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Sample records for gulf coast geopressured-geothermal

  1. United States Gulf Coast geopressured-geothermal program. Annual report, 1 November 1980-31 October 1981

    SciTech Connect

    Dorfman, M.H.; Morton, R.A.; Dunlap, H.F.; Frederick, D.O.; Gray, K.E.; Peters, E.J.; Sepehrnoori, K.; Thompson, T.W.

    1982-07-01

    The following are included: objectives, overview, coordination assistance, compaction measurements on Texas Gulf Coast Sandstones and Shales; US Gulf Coast Geopressured-Geothermal Aquifer simulation, Preliminary Review of Subsidence Insurance Issues, Geopressured-Geothermal Information System, and Study of Log Derived Water Resistivity Values in Geopressured Geothermal Formations. (MHR)

  2. Geopressured geothermal resource of the Texas and Louisiana Gulf Coast: a technology characterization and environmental assessment

    SciTech Connect

    Usibelli, A.; Deibler, P.; Sathaye, J.

    1980-12-01

    Two aspects of the Texas and Louisiana Gulf Coast geopressured geothermal resource: (1) the technological requirements for well drilling, completion, and energy conversion, and, (2) the environmental impacts of resource exploitation are examined. The information comes from the literature on geopressured geothermal research and from interviews and discussions with experts. The technology characterization section emphasizes those areas in which uncertainty exists and in which further research and development is needed. The environmental assessment section discusses all anticipated environmental impacts and focuses on the two largest potential problems: (a) subsidence and (b) brine disposal.

  3. Gulf Coast Geopressured-Geothermal Program Summary Report Compilation. Volume I, Executive Summary

    SciTech Connect

    Chacko, J. John; Maciasz, Gina; Harder, Brian J.

    1998-06-01

    The significant accomplishments of this program included (1) identification of the geopressured-geothermal onshore fairways in Louisiana and Texas, (2) determination that high brine flow rates of 20,000--40,000 barrels a day can be obtained for long periods of time, (3) brine, after gas extraction can be successfully reinjected into shallow aquifers without affecting the surface waters or the fresh water aquifers, (4) no observable subsidence or microseismic activity was induced due to the subsurface injection of brine, and no detrimental environmental effects attributable to geopressured--geothermal well testing were noticed, (5) sanding can be controlled by reducing flow rates, (6) corrosion controlled with inhibitors, (7) scaling controlled by phosphonate scale inhibitors, (8) demonstrated that production of gas from saturated brine under pressure was viable and (9) a hybrid power system can be successfully used for conversion of the thermal and chemical energy contained in the geopressured-geothermal resource for generation of electricity. The U. S. Department of Energy's geopressured-geothermal research program in the Gulf Coast achieved many significant findings and disproved and clarified many historical perceptions that had previously limited industry's interest in developing this resource. Though in today's economic market it may not be commercially profitable to exploit this resource, the rapid advance of technology in all its different aspects could potentially make this resource attractive in the not too distant future. The ideal situation would involve the development of a total energy system in which all three associated forms of energy--chemical, thermal and mechanical are utilized. The extraction of gas from brine combined with the large number of potential direct and indirect uses of this resource will add to its economic profitability. This U.S. DOE's visionary research program has essentially laid the foundations for characterization of this

  4. Radon in unconventional natural gas from gulf coast geopressured-geothermal reservoirs

    USGS Publications Warehouse

    Kraemer, T.F.

    1986-01-01

    Radon-222 has been measured in natural gas produced from experimental geopressured-geothermal test wells. Comparison with published data suggests that while radon activity of this unconventional natural gas resource is higher than conventional gas produced in the gulf coast, it is within the range found for conventional gas produced throughout the U.S. A method of predicting the likely radon activity of this unconventional gas is described on the basis of the data presented, methane solubility, and known or assumed reservoir conditions of temperature, fluid pressure, and formation water salinity.

  5. Uranium geochemistry in geopressured-geothermal aquifers of the U.S. Gulf Coast

    USGS Publications Warehouse

    Kraemer, T.F.; Kharaka, Y.K.

    1986-01-01

    Formation water from U.S. Gulf Coast geopressured-geothermal sandstone aquifers has been analyzed to determine the geochemistry of uranium in these systems. Results of chemical analyses and chemical equilibrium modeling indicate the formation waters are in equilibrium with uraninite (UO2) and coffinite (USiO4). The 234U 238U activity ratios in the formation waters range from 1.06 to 1.69. These isotopic data suggest that at formation temperatures uranium is continually reequilibrating chemically and isotopically between water, a solid phase of either UO2 or USiO4 and a component of 234U supplied to solution from the aquifer matrix material by alpha recoil processes. ?? 1986.

  6. Gulf Coast geopressured-geothermal program summary report compilation. Volume 1: Executive summary

    SciTech Connect

    John, C.J.; Maciasz, G.; Harder, B.J.

    1998-06-01

    The significant accomplishments of this program included (1) identification of the geopressured-geothermal onshore fairways in Louisiana and Texas, (2) determination that high brine flow rates of 20,000--40,000 barrels a day can be obtained for long periods of time, (3) brine, after gas extraction can be successfully reinjected into shallow aquifers without affecting the surface waters or the fresh water aquifers, (4) no observable subsidence or microseismic activity was induced due to the subsurface injection of brine, and no detrimental environmental effects attributable to geopressured-geothermal well testing were noticed, (5) sanding can be controlled by reducing flow rates, (6) corrosion controlled with inhibitors, (7) scaling controlled by phosphonate scale inhibitors, (8) demonstrated that production of gas from saturated brine under pressure was viable and (9) a hybrid power system can be successfully used for conversion of the thermal and chemical energy contained in the geopressured-geothermal resource for generation of electricity.

  7. Depositional setting, structural style, and sandstone distribution in three geopressured geothermal areas, Texas Gulf Coast

    SciTech Connect

    Winker, C.D.; Morton, R.A.; Ewing, T.E.; Garcia, D.D.

    1983-01-01

    Three areas in the Texas Gulf Coastal Plain were studied using electric logs and seismic-reflection data to interpret their depositional and structural history and to compare their potential as geopressured-geothermal reservoirs. The Cuero study area, on the lower Wilcox (upper Paleocene) growth-fault trend, is characterized by closely and evenly spaced, subparallel, down-to-the-basin growth faults, relatively small expansion ratios, and minor block rotation. Distributary-channel sandstones in the geopressured lower Wilcox Group of the South Cook fault block appear to be the best geothermal aquifers in the Cuero area. The Blessing study area, on the lower Frio (Oligocene) growth-fault trend, shows wider and more variable fault spacing and much greater expansion ratios and block rotation, particularly during early Frio time. Thick geopressured sandstone aquifers are laterally more extensive in the Blessing area than in the Cuero area. The Pleasant Bayou study area, like the Blessing area, is on the Frio growth-fault trand, and its early structural development was similar rapid movement of widely spaced faults resulted in large expansion ratios and major block rotation. However, a late-stage pattern of salt uplift and withdrawal complicated the structural style. Thick geopressured lower Frio sandstone aquifers are highly permeable and laterally extensive, as in the Blessing area. In all three areas, geopressured aquifers were created where early, rapid movement along down-to-the-basin growth faults juxtaposed shallow-water sands against older shales, probably deposited in slope environments. Major transgressions followed the deposition of reservoir sands and probably also influenced the hydraulic isolation that allowed the build up of abnormal pressures. 26 refs., 49 figs., 8 tabs.

  8. Failure studies on Texas Gulf Coast geopressured-geothermal sandstones and shales

    SciTech Connect

    Jogi, P.N.; Llewellyn, B.C.; Gray, K.E.

    1981-10-01

    Triaxial compression tests were run at room temperature to determine failure characteristics of rocks extracted from the geopressured-geothermal reservoir underlying Brazoria County. Effects of both confining and pore fluid pressure were considered. Like all other rocks, ultimate strength was found to increase with increase in effective confining pressure. Partial ductile behavior was observed at pressures above 5000 psi. In general rocks from this reservoir were found to be considerably weaker than corresponding well compacted sandstones.

  9. Depositional setting, structural style, and sandstone distribution in three geopressured geothermal areas, Texas Gulf Coast

    SciTech Connect

    Winker, C.D.; Morton, R.A.; Ewing, T.E.; Garcia, D.D.

    1981-10-01

    Three areas in the Texas Gulf Coast region with different depositional settings, structural styles, and sandstone distribution were studied with well log and seismic data to evaluate some of the controls on subsurface conditions in geopressured aquifers. Structural and stratigraphic interpretations were made primarily on the basis of well log correlations. Seismic data confirm the log interpretations but also are useful in structure mapping at depths below well control.

  10. Gulf Coast geopressured-geothermal program summary report compilation. Volume 4: Bibliography (annotated only for all major reports)

    SciTech Connect

    John, C.J.; Maciasz, G.; Harder, B.J.

    1998-06-01

    This bibliography contains US Department of Energy sponsored Geopressured-Geothermal reports published after 1984. Reports published prior to 1984 are documented in the Geopressured Geothermal bibliography Volumes 1, 2, and 3 that the Center for Energy Studies at the University of Texas at Austin compiled in May 1985. It represents reports, papers and articles covering topics from the scientific and technical aspects of geopressured geothermal reservoirs to the social, environmental, and legal considerations of exploiting those reservoirs for their energy resources.

  11. Gulf Coast geopressured-geothermal program summary report compilation. Volume 3: Applied and direct uses, resource feasibility, economics

    SciTech Connect

    John, C.J.; Maciasz, G.; Harder, B.J.

    1998-06-01

    The US Department of Energy established a geopressured-geothermal energy program in the mid 1970`s as one response to America`s need to develop alternate energy resources in view of the increasing dependence on imported fossil fuel energy. This program continued for 17 years and approximately two hundred million dollars were expended for various types of research and well testing to thoroughly investigate this alternative energy source. This volume describes the following studies: Geopressured-geothermal hybrid cycle power plant: design, testing, and operation summary; Feasibility of hydraulic energy recovery from geopressured-geothermal resources: economic analysis of the Pelton turbine; Brine production as an exploration tool for water drive gas reservoirs; Study of supercritical Rankine cycles; Application of the geopressured-geothermal resource to pyrolytic conversion or decomposition/detoxification processes; Conclusions on wet air oxidation, pyrolytic conversion, decomposition/detoxification process; Co-location of medium to heavy oil reservoirs with geopressured-geothermal resources and the feasibility of oil recovery using geopressured-geothermal fluids; Economic analysis; Application of geopressured-geothermal resources to direct uses; Industrial consortium for the utilization of the geopressured-geothermal resource; Power generation; Industrial desalination, gas use and sales, pollutant removal, thermal EOR, sulfur frasching, oil and natural gas pipelining, coal desulfurization and preparation, lumber and concrete products kilning; Agriculture and aquaculture applications; Paper and cane sugar industries; Chemical processing; Environmental considerations for geopressured-geothermal development. 27 figs., 25 tabs.

  12. Gulf Coast geopressured-geothermal program summary report compilation. Volume 2-A: Resource description, program history, wells tested, university and company based research, site restoration

    SciTech Connect

    John, C.J.; Maciasz, G.; Harder, B.J.

    1998-06-01

    The US Department of Energy established a geopressured-geothermal energy program in the mid 1970`s as one response to America`s need to develop alternate energy resources in view of the increasing dependence on imported fossil fuel energy. This program continued for 17 years and approximately two hundred million dollars were expended for various types of research and well testing to thoroughly investigate this alternative energy source. This volume describes the following studies: Geopressured-geothermal resource description; Resource origin and sediment type; Gulf Coast resource extent; Resource estimates; Project history; Authorizing legislation; Program objectives; Perceived constraints; Program activities and structure; Well testing; Program management; Program cost summary; Funding history; Resource characterization; Wells of opportunity; Edna Delcambre No. 1 well; Edna Delcambre well recompletion; Fairfax Foster Sutter No. 2 well; Beulah Simon No. 2 well; P.E. Girouard No. 1 well; Prairie Canal No. 1 well; Crown Zellerbach No. 2 well; Alice C. Plantation No. 2 well; Tenneco Fee N No. 1 well; Pauline Kraft No. 1 well; Saldana well No. 2; G.M. Koelemay well No. 1; Willis Hulin No. 1 well; Investigations of other wells of opportunity; Clovis A. Kennedy No. 1 well; Watkins-Miller No. 1 well; Lucien J. Richard et al No. 1 well; and the C and K-Frank A. Godchaux, III, well No. 1.

  13. Wilcox sandstone reservoirs in the deep subsurface along the Texas Gulf Coast: their potential for production of geopressured geothermal energy. Report of Investigations No. 117

    SciTech Connect

    Debout, D.G.; Weise, B.R.; Gregory, A.R.; Edwards, M.B.

    1982-01-01

    Regional studies of the lower Eocene Wilcox Group in Texas were conducted to assess the potential for producing heat energy and solution methane from geopressured fluids in the deep-subsurface growth-faulted zone. However, in addition to assembling the necessary data for the geopressured geothermal project, this study has provided regional information of significance to exploration for other resources such as lignite, uranium, oil, and gas. Because the focus of this study was on the geopressured section, emphasis was placed on correlating and mapping those sandstones and shales occurring deeper than about 10,000 ft. The Wilcox and Midway Groups comprise the oldest thick sandstone/shale sequence of the Tertiary of the Gulf Coast. The Wilcox crops out in a band 10 to 20 mi wide located 100 to 200 mi inland from the present-day coastline. The Wilcox sandstones and shales in the outcrop and updip shallow subsurface were deposited primarily in fluvial environments; downdip in the deep subsurface, on the other hand, the Wilcox sediments were deposited in large deltaic systems, some of which were reworked into barrier-bar and strandplain systems. Growth faults developed within the deltaic systems, where they prograded basinward beyond the older, stable Lower Cretaceous shelf margin onto the less stable basinal muds. Continued displacement along these faults during burial resulted in: (1) entrapment of pore fluids within isolated sandstone and shale sequences, and (2) buildup of pore pressure greater than hydrostatic pressure and development of geopressure.

  14. United States Gulf Coast geopressured geothermal program. Special projects research and coordination assistance. Final report, 1 December 1978-30 October 1980

    SciTech Connect

    Dorfman, M.H.; Morton, R.A.

    1981-06-01

    Work for the period, December 1, 1978 through October 31, 1980, is documented. The following activities are covered: project technical coordination assistance and liaison; technical assistance for review and evaluation of proposals and contract results; technical assistance for geopressured-geothermal test wells; technical assistance, coordination, and planning of surface utilization program; legal research; and special projects. (MHR)

  15. Environmental impact of geopressure - geothermal cogeneration facility on wetland resources and socioeconomic characteristics in Louisiana Gulf Coast region. Final report, October 10, 1983-September 31, 1984

    SciTech Connect

    Smalley, A.M.; Saleh, F.M.S.; Fontenot, M.

    1984-08-01

    Baseline data relevant to air quality are presented. The following are also included: geology and resource assessment, design well prospects in southwestern Louisiana, water quality monitoring, chemical analysis subsidence, microseismicity, geopressure-geothermal subsidence modeling, models of compaction and subsidence, sampling handling and preparation, brine chemistry, wetland resources, socioeconomic characteristics, impacts on wetlands, salinity, toxic metals, non-metal toxicants, temperature, subsidence, and socioeconomic impacts. (MHR)

  16. Gulf Coast geopressured-geothermal program summary report compilation. Volume 2-B: Resource description, program history, wells tested, university and company based research, site restoration

    SciTech Connect

    John, C.J.; Maciasz, G.; Harder, B.J.

    1998-06-01

    The US Department of Energy established a geopressured-geothermal energy program in the mid 1970`s as one response to America`s need to develop alternate energy resources in view of the increasing dependence on imported fossil fuel energy. This program continued for 17 years and approximately two hundred million dollars were expended for various types of research and well testing to thoroughly investigate this alternative energy source. This volume describes the following studies: Design well program; LaFourche Crossing; MG-T/DOE Amoco Fee No. 1 (Sweet Lake); Environmental monitoring at Sweet Lake; Air quality; Water quality; Microseismic monitoring; Subsidence; Dow/DOE L.R. Sweezy No. 1 well; Reservoir testing; Environmental monitoring at Parcperdue; Air monitoring; Water runoff; Groundwater; Microseismic events; Subsidence; Environmental consideration at site; Gladys McCall No. 1 well; Test results of Gladys McCall; Hydrocarbons in production gas and brine; Environmental monitoring at the Gladys McCall site; Pleasant Bayou No. 2 well; Pleasant Bayou hybrid power system; Environmental monitoring at Pleasant Bayou; and Plug abandonment and well site restoration of three geopressured-geothermal test sites. 197 figs., 64 tabs.

  17. The Geopressured-Geothermal Resource, research and use

    SciTech Connect

    Negus-de Wys, J.

    1990-01-01

    The Geopressured-Geothermal Resource has an estimated accessible resource base of 5700 quads of gas and 11,000 quads of thermal energy in the onshore Texas and Louisiana Gulf Coast area alone. After 15 years the program is now beginning a transition to commercialization. The program presently has three geopressured- geothermal wells in Texas and Louisiana. Supporting research in the Geopressured Program includes research on rock mechanics, logging, geologic studies, reservoir modeling, and co-location of brine and heavy oil, environmental monitoring, geologic studies, hydrocarbons associated with the geopressured brines and development of a pH monitor for harsh environments, research support in prediction of reservoir behavior, thermal enhanced oil recovery, direct use, hydraulic and thermal conversion, and use of supercritical processes and pyrolysis in detoxification. The on-going research and well operations are preparing the way to commercialization of the Geopressured-Geothermal Resource is covered in this report. 12 refs., 8 figs., 1 tab.

  18. Geopressured-Geothermal Research Program: An Overview

    SciTech Connect

    Fortuna, Raymond; Jelacic, Allan

    1989-04-01

    The geopressured-geothermal resource consists of deeply buried reservoirs of hot brine, under abnormally high pressures, that contain dissolved methane. Geopressured brine reservoirs with pressures approaching the lithostatic load are known to occur both onshore and offshore beneath the Gulf of Mexico coast, along the Pacific west coast, in Appalachia, as well as in deep sedimentary basins elsewhere in the United States. The Department of Energy (DOE) has concentrated its research on the northern Gulf of Mexico sedimentary basin (Figure 1) which consists largely of Tertiary interbedded sandstones and shales deposited in alternating deltaic, fluvial, and marine environments. Thorsen (1964) and Norwood and Holland (1974) describe three generalized depositional facies in sedimentary beds of the Gulf Coast Geosyncline (Figure 2 ): (1) a massive sandstone facies in which sandstone constitutes 50 percent o r more of the sedimentary volume; (2) an alternating sandstone and shale facies in which sandstone constitutes 15 to 35 percent of the sedimentary volume. (3) a massive shale facies in which sandstone constitutes 15 percent or less of the sedimentary volume. In general, at any given location the volume of sandstone decreases with increasing depth. The datum of higher-than-normal fluid pressures is associated with the alternating sandstone and shale facies and the massive shale facies. Faulting and salt tectonics have complicated the depositional patterns and influenced the distribution of geopressured reservoirs (Wallace et a1 1978). The sandstones in the alternating sandstone and shale facies have the greatest potential for geopressured-geothermal energy development. Due to the insulating effect of surrounding shales, temperatures of the geopressured-geothermal brines typically range from 250 F to over 350 F, and under prevailing temperature, pressure, and salinity conditions, the brine contains 20 or more cubic feet of methane per barrel. Wallace et al (1978

  19. Problem definition study of subsidence caused by geopressured geothermal resource development

    SciTech Connect

    Not Available

    1980-12-01

    The environmental and socio-economic settings of four environmentally representative Gulf Coast geopressured geothermal fairways were inventoried. Subsidence predictions were prepared using feasible development scenarios for the four representative subsidence sites. Based on the results of the subsidence estimates, an assessment of the associated potential environmental and socioeconomic impacts was prepared. An inventory of mitigation measures was also compiled. Results of the subsidence estimates and impact assessments are presented, as well as conclusions as to what are the major uncertainties, problems, and issues concerning the future study of geopressured geothermal subsidence.

  20. Technical support for geopressured-geothermal well activities in Louisiana

    SciTech Connect

    Not Available

    1991-07-01

    Continuous recording microearthquake monitoring networks have been established around US Department of Energy (DOE) geopressured-geothermal design wells in southwestern Louisiana and southeastern Texas since summer 1980 to assess the effects well development may have had on subsidence and growth-fault activation. This monitoring has shown several unusual characteristics of Gulf Coast seismic activity. The observed activity is classified into two dominant types, one with identifiable body phases (type 1) and the other with only surface-wave signatures (type 2). During this reporting period no type 1 or body-wave events were reported. A total of 230 type 2 or surface-wave events were recorded. Origins of the type 2 events are still not positively understood; however, little or no evidence is available to connect them with geopressured-geothermal well activity. We continue to suspect sonic booms from military aircraft or some other human-induced source. 37 refs., 16 figs., 6 tabs.

  1. Economic review of the geopressured-geothermal resource with recommendations

    SciTech Connect

    Plum, M.M.; Negus-de Wys, J.; Faulder, D.D.; Lunis, B.C.

    1989-11-01

    This report presents the results of an economic study conducted by the INEL under DOE Contract No. AC07-76ID01570 to evaluate the breakeven price to market energy from a geopressured-geothermal resource. A breakeven price is a minimum, per unit charge required for the developer to recover all direct and indirect costs and a rate of return sufficient to compensate the developer for depreciation, the time value of money, and the risk of failure. The DOE Geopressured-Geothermal Research Program and the DOE well testing and operations at three locations in the Gulf Coast region provide the bulk of resource and economic characteristics for this study. A menu-driven model was developed in LOTUS-123 to calculate the breakeven price to market gas and electricity from a geopressured-geothermal resource. This model was developed using the present value methodology and conservative assumptions. Assuming present well constraints and current off-the-shelf conversion technology, the breakeven price for electricity is about $0.26/kWh using only the thermal energy from a Hulin-type resource. Assuming identical resource and technology constraints, the breakeven price is reduced to about $0.15/kWh when using all available energy forms (methane, hydraulic, and thermal). Assuming the use of available advanced technologies, the breakeven price is reduced to about $0.10/kWh. Assuming the higher quality resource (with higher temperature and gas content) in the South Texas cases, the breakeven cost is about $0.095/kWh. Using advanced technology, this cost is further reduced to about $0.05/kWh. Both costs are within program goals. The results of this study suggest that the future direction of the Geopressured-Geothermal Program emphasize (a) selection of higher quality resource, (b) advanced energy conversion technology, and (c) total energy utilization.

  2. Parcperdue Geopressure -- Geothermal Project: Appendix E

    SciTech Connect

    Sweezy, L.R.

    1981-10-05

    The mechanical and transport properties and characteristics of rock samples obtained from DOW-DOE L.R. SWEEZY NO. 1 TEST WELL at the Parcperdue Geopressure/Geothermal Site have been investigated in the laboratory. Elastic moduli, compressibility, uniaxial compaction coefficient, strength, creep parameters, permeability, acoustic velocities (all at reservoir conditions) and changes in these quantities induced by simulated reservoir production have been obtained from tests on several sandstone and shale samples from different depths. Most important results are that the compaction coefficients are approximately an order of magnitude lower than those generally accepted for the reservoir sand in the Gulf Coast area and that the creep behavior is significant. Geologic characterization includes lithological description, SEM micrographs and mercury intrusion tests to obtain pore distributions. Petrographic analysis shows that approximately half of the total sand interval has excellent reservoir potential and that most of the effective porosity in the Cib Jeff Sand is formed by secondary porosity development.

  3. Geopressured geothermal drilling and completions technology development needs

    SciTech Connect

    Maish, A.B.

    1981-03-01

    Geopressured geothermal formations found in the Texas and Louisiana gulf coast region and elsewhere have the potential to supply large quantities of energy in the form of natural gas and warm brine (200 to 300/sup 0/F). Advances are needed, however, in hardware technology, well design technology, and drilling and completion practices to enable production and testing of exploratory wells and to enable economic production of the resource should further development be warranted. This report identifies needed technology for drilling and completing geopressured geothermal source and reinjection wells to reduce the cost and to accelerate commercial recovery of this resource. A comprehensive prioritized list of tasks to develop necessary technology has been prepared. Tasks listed in this report address a wide range of technology needs including new diagnostic techniques, control technologies, hardware, instrumentation, operational procedure guidelines and further research to define failure modes and control techniques. Tasks are organized into the functional areas of well design, drilling, casing installation, cementing, completions, logging, brine reinjection and workovers.

  4. Pleasant Bayou Geopressured-Geothermal Reservoir Analysis - January 1991

    SciTech Connect

    Riney, T.D.

    1991-01-01

    Many sedimentary basins contain formations with pore fluids at pressures higher than hydrostatic value; these formations are called geopressured. The pore pressure is generally well in excess of hydrostatic and the fluids vary in scalinity, temperature, and dissolved methane. As part of its program to define the magnitude and recoverability of the geopressured-geothermal energy resource, the US Department of Energy has drilled and tested deep wells in geopressured formations in the Texas-Louisiana Gulf Coast region. Geological information for the Pleasant Bayou geopressured geothermal resource is most extensive among the reservoirs tested. Earlier testing of the DOE well (Pleasant Bayou Well No.2) was conducted in several phases during 1979-1983. Long-term testing was resumed in May 1988 and is currently in progress. This report summarizes the pertinent field and laboratory test data available through December 31, 1990. A numerical reservoir simulator is employed as a tool for synthesizing and integrating the reservoir information, formation rock and fluid properties data from laboratory tests, well data from the earlier testing (1979-1983), and the ongoing long-term production testing (1988-1990) of Pleasant Bayou Well No.2. A reservoir simulation model has been constructed which provides a detailed match to the well test history to date. This model is constructed within a geologic framework described by the Texas Bureau of Economic Geology and relies heavily on the pressure transient data from the 1980 Reservoir Limits Test in conjunction with the 1988-1990 production testing.

  5. Geopressured geothermal bibliography (Geopressure Thesaurus)

    SciTech Connect

    Hill, T.R.; Sepehrnoori, K.

    1981-08-01

    This thesaurus of terminology associated with the geopressured geothermal energy field has been developed as a part of the Geopressured Geothermal Information System data base. A thesaurus is a compilation of terms displaying synonymous, hierarchical, and other relationships between terms. These terms, which are called descriptors, constitute the special language of the information retrieval system, the system vocabulary. The Thesaurus' role in the Geopressured Geothermal Information System is to provide a controlled vocabulary of sufficient specificity for subject indexing and retrieval of documents in the geopressured geothermal energy field. The thesauri most closely related to the Geopressure Thesaurus in coverage are the DOE Energy Information Data Base Subject Thesaurus and the Geothermal Thesaurus being developed at the Lawrence Berkeley Laboratory (LBL). The Geopressure Thesaurus differs from these thesauri in two respects: (1) specificity of the vocabulary or subject scope and (2) display format.

  6. Comparison of estimated and background subsidence rates in Texas-Louisiana geopressured geothermal areas

    SciTech Connect

    Lee, L.M.; Clayton, M.; Everingham, J.; Harding, R.C.; Massa, A.

    1982-06-01

    A comparison of background and potential geopressured geothermal development-related subsidence rates is given. Estimated potential geopressured-related rates at six prospects are presented. The effect of subsidence on the Texas-Louisiana Gulf Coast is examined including the various associated ground movements and the possible effects of these ground movements on surficial processes. The relationships between ecosystems and subsidence, including the capability of geologic and biologic systems to adapt to subsidence, are analyzed. The actual potential for environmental impact caused by potential geopressured-related subsidence at each of four prospects is addressed. (MHR)

  7. Continuity and internal properties of Gulf Coast sandstones and their implications for geopressured fluid production

    SciTech Connect

    Morton, R.A.; Ewing, T.E.; Tyler, N.

    1983-01-01

    The intrinsic properties of the genetic sandstone units that typify many geopressured geothermal aquifers and hydrocarbon reservoirs in the Gulf Coast region were systematically investigated classified, and differentiated. The following topics are coverd: structural and stratigraphic limits of sandstone reservoirs, characteristics and dimensions of Gulf Coast sandstones; fault-compartment areas; comparison of production and geologic estimates of aquifer fluid volume; geologic setting and reservoir characteristics, Wells of Opportunity; internal properties of sandstones; and implications for geopressured fluid production. (MHR)

  8. Depletion and recovery behavior of the Gladys McCall geopressured geothermal reservoir

    SciTech Connect

    Riney, T.D. )

    1990-06-01

    Many sedimentary basins throughout the world contain sealed fault blocks in which the pore fluids are at higher pressures and temperatures than normal as a consequence of their depositional environment. The U.S. Department of Energy has drilled, completed, and tested four deep research wells in selected geopressured geothermal prospects in the Texas-Louisiana Gulf Coast region to evaluate the recoverability of the thermal, hydraulic, and chemical (methane) energy in this potential energy resource. The wells are expensive and the specific energy of the fluids is relatively small, but the total recoverable energy from a single well can be extremely large. Long-term testing of the Gladys McCall No. 1 research well, located in Cameron Parish, Louisiana, U.S.A., has defined an impressively large geopressured geothermal reservoir. In this paper an integrated analysis of the test data is presented, and a numerical model is constructed that matches the available data for the 6.5-year test history of the well.

  9. Continuity and internal properties of Gulf Coast sandstones and their implications for geopressured energy development. Annual report, November 1, 1980-October 31, 1981

    SciTech Connect

    Morton, R.A.; Ewing, T.E.; Tyler, N.

    1982-06-01

    Systematic investigation, classification, and differentiation of the intrinsic properties of genetic sandstone units that typify many geopressured geothermal aquifers and hydrocarbon reservoirs of the Gulf Coast region are provided. The following are included: structural and stratigraphic limits of sandstone reservoirs; characteristics and dimensions of Gulf Coast Sandstones; fault compartment areas; comparison of production and geologic estimates of aquifer volume; geologic setting and reservoir characteristics, wells of opportunity; internal properties of sandstones and implications for geopressured energy development. (MHR)

  10. Subsidence measurements around geopressured-geothermal test sites in southwestern Louisiana

    SciTech Connect

    Trahan, D.B.

    1988-02-01

    First-order elevation surveys of benchmark networks established around geopressured-geothermal test sites in southwestern Louisiana have been conducted before, during, and after testing to determine the potential for growth fault activation and compactional subsidence due to depressurization of geopressured-geothermal reservoirs. Subsidence increased to the south along the line from Lafayette, Louisiana, to the Parcperdue test site as expected as this line descends the flank of the Iberian structural axis. Subsidence varied for benchmarks around the site and by yearly rate although the yearly pattern was consistent. During the period from 1980 to 1982, the benchmarks on the site may have subsided more than other benchmarks due to compaction of soils by drilling and testing equipment. Motion rates for benchmarks around the Sweet Lake geopressured-geothermal test site south of Lake Charles, Louisiana, were highly variable during the period from 1980 to 1984 and were less variable from 1984 to 1986. These rates and patterns of motion may reflect the instability of the Sweet Lake salt dome located south of the prospect but do not correlate with the subsidence expected from geopressured-geothermal development. Relevelings of the benchmark network around the Gladys McCall geopressured-geothermal test site on the coast illustrate generally decreasing subsidence from west to east and slight variations among benchmark motions. The greatest subsidence occurred along the well access road and at the well site from 1981 to 1984 coincident with well-site preparation and drilling.

  11. Recoverable Resource Estimate of Identified Onshore Geopressured Geothermal Energy in Texas and Louisiana (Presentation)

    SciTech Connect

    Esposito, A.; Augustine, C.

    2012-04-01

    Geopressured geothermal reservoirs are characterized by high temperatures and high pressures with correspondingly large quantities of dissolved methane. Due to these characteristics, the reservoirs provide two sources of energy: chemical energy from the recovered methane, and thermal energy from the recovered fluid at temperatures high enough to operate a binary power plant for electricity production. Formations with the greatest potential for recoverable energy are located in the gulf coastal region of Texas and Louisiana where significantly overpressured and hot formations are abundant. This study estimates the total recoverable onshore geopressured geothermal resource for identified sites in Texas and Louisiana. In this study a geopressured geothermal resource is defined as a brine reservoir with fluid temperature greater than 212 degrees F and a pressure gradient greater than 0.7 psi/ft.

  12. Geopressured geothermal bibliography. Volume 1 (citation extracts)

    SciTech Connect

    Hill, T.R.; Sepehrnoori, K.

    1981-08-01

    This bibliography was compiled by the Center for Energy Studies at The University of Texas at Austin to serve as a tool for researchers in the field of geopressured geothermal energy resources. The bibliography represents citations of papers on geopressured geothermal energy resources over the past eighteen years. Topics covered in the bibliography range from the technical aspects of geopressured geothermal reservoirs to social, environmental, and legal aspects of tapping those reservoirs for their energy resources. The bibliography currently contains more than 750 entries. For quick reference to a given topic, the citations are indexed into five divisions: author, category, conference title, descriptor, and sponsor. These indexes are arranged alphabetically and cross-referenced by page number.

  13. Geopressured-geothermal well activities in Louisiana

    SciTech Connect

    John, C.J.

    1992-10-01

    Since September 1978, microseismic networks have operated continuously around US Department of Energy (DOE) geopressured-geothermal well sites to monitor any microearthquake activity in the well vicinity. Microseismic monitoring is necessary before flow testing at a well site to establish the level of local background seismicity. Once flow testing has begun, well development may affect ground elevations and/or may activate growth faults, which are characteristic of the coastal region of southern Louisiana and southeastern Texas where these geopressured-geothermal wells are located. The microseismic networks are designed to detest small-scale local earthquakes indicative of such fault activation. Even after flow testing has ceased, monitoring continues to assess any microearthquake activity delayed by the time dependence of stress migration within the earth. Current monitoring shows no microseismicity in the geopressured-geothermal prospect areas before, during, or after flow testing.

  14. Overview of Geopressured-Geothermal

    SciTech Connect

    Jelacic, Allan

    1992-03-24

    Dr. Mock began the session by paying tribute to Dr. Myron Dorfman, Professor of Petroleum Engineering at the University of Texas, who had just passed away after a protracted illness. Dr. Dorfman, more than other any individual, was responsible for bringing the geopressured-geothermal state-of-the-art to its present technological readiness for commercialization by industry. Allan Jelacic, Geosciences Team Leader, Geothermal Division, chaired the formal session and gave a historic overview of the conference that defined research needs and economic potential of the resource. First the Nevada Field Office and later the Idaho Field Office took the lead in setting research directions and managing the program. The major research activity was to flow-test ten Wells of Opportunity, provided by industry, as well as the Design Wells, of which four were drilled. Initial problems with calcium carbonate scale deposition and the safe handling and disposition of up to 30,000 barrels of geopressured brine per day were solved. A series of seminal conferences followed so that by the mid-eighties, the resource's extent and productivity were understood, and DOE's Geothermal Division was proceeding with technology transfer to industry. Allan Jelacic pointed out that currently the program is phasing down, with only three active wells remaining: Hulin, Pleasant Bayou, and Gladys McCall. Nevertheless, environmental monitoring, which to date has yielded no significant water quality or seismicity problems, will continue for several more years. The $190 million spent on the program yielded a number of major accomplishments, not the least of which was confirming USGS's initial estimate of the resource, which turned out to be the largest source of natural gas in the US. The economics of power production, however, are not attractive at this time, given the relatively low brine temperatures and current economic conditions in the energy sector. The next speaker, Ben Eaton, of Eaton Operating

  15. Subsidence measurements around geopressured-geothermal test sites in southwestern Louisiana

    SciTech Connect

    Trahan, D.B.

    1988-01-01

    First-order elevation surveys of benchmark networks established around geopressured-geothermal test sites in southwestern Louisiana have been conducted before, during, and after testing to determine the potential for growth fault activation and compactional subsidence due to depressurization of geopressured-geothermal reservoirs. Subsidence increased to the south along the line from Lafayette, Louisiana, to the Parcperdue test site as expected as this line descends the flank of the Iberian structural axis. Subsidence varied for benchmarks around the site and by yearly rate although the yearly pattern was consistent. During the period from 1980 to 1982, the benchmarks on the site may have subsided more than other benchmarks due to compaction of soils by drilling and testing equipment. Motion rates for benchmarks around the Sweet Lake geopressured-geothermal test site south of Lake Charles, Louisiana, were highly variable during the period from 1980 to 1984 and were less variable from 1984 to 1986. These rates and patterns of motion may reflect the instability of Sweet Lake salt dome located south of the prospect but do not correlate with the subsidence expected from geopressured-geothermal development. Relevelings of the benchmark network around the Gladys McCall geopressured-geomthermal test site on the coast illustrate generally decreasing subsidence from west to east and slight variations among benchmark motions. The greatest subsidence occurred along the well access road and the well site from 1981 to 1984 coincident with well-site preparation and drilling.

  16. Evaluation of potential geopressure geothermal test sites in southern Louisiana

    SciTech Connect

    Bassiouni, Z.

    1980-04-01

    Six geopressured-geothermal prospects in southern Louisiana were studied in detail to assess their potential use as test sites for the production of geopressure-geothermal energy. Each of the six sites contains substantial quantities of energy. Three of these prospects, Grand Lake, Lake Theriot, and Bayou Hebert, appear to be suitable for a test site. A summary of the findings is presented.

  17. Consolidation of geologic studies of geopressured geothermal resources in Texas. 1982 annual report

    SciTech Connect

    Morton, R.A.; Ewing, T.E.; Kaiser, W.R.; Finley, R.J.

    1983-03-01

    Detailed structural mapping at several horizons in selected study areas within the Frio growth-fault trend demonstrates a pronounced variability in structural style. At Sarita in South Texas, shale mobilization produced one or more shale ridges, one of which localized a low-angle growth fault trapping a wedge of deltaic sediments. At Corpus Christi, shale mobilization produced a series of large growth faults, shale-cored domed anticlines, and shale-withdrawal basins, which become progressively younger basinward. At Blessing, major growth faults trapped sands of the Greta/Carancahua barrier system with little progradation. At Pleasant Bayou, a major early growth-fault pattern was overprinted by later salt tectonics - the intrusion of Danbury Dome and the development of a salt-withdrawal basin. At Port Arthur, low-displacement, long-lived faults formed on a sand-poor shelf margin contemporaneously with broad salt uplifts and basins. Variability in styles is related to the nature and extent of Frio sedimentation and shelf-margin progradation and to the presence or absence of salt. Structural styles that are conducive to the development of large geothermal reservoirs include blocks between widely spaced growth faults having dip reversal, salt-withdrawal basins, and shale-withdrawal basins. These styles are widespread on the Texas Gulf Coast. However, actually finding a large reservoir depends on demonstrating the existence of sufficient sandstone with adequate quality to support geopressured geothermal energy production.

  18. Properties of geopressured brines and wells in the Gulf Coast and opportunities for industrial/research participation

    SciTech Connect

    Negus-de Wys, J.

    1989-01-01

    Geopressured reservoirs exhibit pressure gradients in excess of the normal hydrostatic gradient. (In the Gulf Coast area the normal gradient is 0.465 psi/ft.) Pressures may approach lithostatic pressure and have been measured as high as 1.05 psi/ft in the Gulf Coast area. Geopressured basins exist worldwide and in a number of US locations, east, west, north and south. The Gulf Coast area has been studied extensively and is the subject of the DOE geopressured-geothermal research at present. Present industrial interest in the Pleasant Bayou and Hulin wells include: desalination plants, an economic study by a power company for regional use, use of generated electricity by a coalition of towns, aquaculture (catfish farming) research program, and an unsolicited proposal for enhanced oil recovery of heavy oil. Direct uses of the hot brine cover dozens of industries and processes. An example of multiple uses in the USSR is shown. A research spin-off: a sensitive in-line benzene monitor has been designed by USL and will be tested in the near future. An in-line pH monitor is also under development for the harsh conditions of the geopressured-geothermal wells. 24 refs., 12 figs.

  19. Sweet Lake Geopressured-geothermal Project, Magma Gulf-Technadril/DOE Amoco Fee. Volume II. Surface installations reservoir testing. Annual report, February 28, 1981-February 10, 1982

    SciTech Connect

    Hoffman, K.S.

    1984-01-01

    The Magma Gulf-Technadril/Department of Energy Amoco Fee No. 1 (production) and salt water disposal wells were drilled in the period from August, 1980 to February 1981. Surface facilities were designed and constructed during March-June 1981. Flow testing began in June 1981 and continued until February, 1982. The Miogypsinoides interval contains seven discrete sands in the test well. These sands have been numbered 1 to 7, beginning at the top of the sequence. Data from wireline logs and core samples suggested that the first zone to be perforated should be Sand 5. Because of its high porosity and permeability, Sand 5 was thought to contain almost 50% of the total hydraulic capacity of the well. Flow testing of Sand 5 was performed in three stages, each of which is fully described in this report. Phase I was designed as an initial clean-up flow and a reservoir confirmation test. Phase II consisted of the reservoir limit determination test and lasted 17 days. Boundaries were confirmed which suggest that the Sweet Lake reservoir is fairly narrow, with boundaries on three sides, but is open in one direction with no closure for at least 4-1/4 miles. These boundaries approximate the shape of the graben in which the test well was drilled, but may or may not be directly related to the major faults forming the graben. Phase III testing was planned to be a long-term test at commercial design rates. Although Sand 5 alone would not support such rates, long-term production was demonstrated. Additional research not supported by DOE funding was also performed during the period covered by this report. This research, consisting of mud logging, micropaleontology, organic geochemistry, core analysis, and rock mechanics, is summarized in this report.

  20. Geopressured geothermal bibliography. Volume III. (Geopressure thesaurus). Second edition

    SciTech Connect

    Sepehrnoori, K.; Carter, F.; Schneider, R.; Street, S.; McGill, K.

    1985-05-01

    This thesaurus of terminology associated with the geopressured geothermal energy field has been developed as a part of the Geopressured Geothermal Information System data base. The subject scope includes: (1) geopressure resource assessment; (2) geology, hydrology, and geochemistry of geopressured systems; (3) geopressure exploration and exploration technology; (4) geopressured reservoir engineering and drilling technology; (5) economic aspects; (6) environmental aspects; (7) legal, institutional, and sociological aspects; (8) electrical and nonelectrical utilization; and (9) other energy sources, especially methane and other fossil fuel reserves, associated with geopressured reservoirs.

  1. Frio sandstone reservoirs in the deep subsurface along the Texas Gulf Coast: their potential for production of geopressured geothermal energy

    SciTech Connect

    Bebout, D.G.; Loucks, R.G.; Gregory, A.R.

    1983-01-01

    Detailed geological, geophysical, and engineering studies conducted on the Frio Formation have delineated a geothermal test well site in the Austin Bayou Prospect which extends over an area of 60 square miles. A total of 800 to 900 feet of sandstone will occur between the depths of 13,500 and 16,500 feet. At leat 30 percent of the sand will have core permeabilities of 20 to 60 millidarcys. Temperature at the top of the sandstone section will be 300/sup 0/F. Water, produced at a rate of 20,000 to 40,000 barrels per day, will probably have to be disposed of by injection into shallower sandstone reservoirs. More than 10 billion barrels of water are in place in these sandstone reservoirs of the Austin Bayou Prospect; there should be approximately 400 billion cubic feet of methane in solution in this water. Only 10 percent of the water and methane (1 billion barrels of water and 40 billion cubic feet of methane) will be produced without reinjection of the waste water into the producing formation. Reservoir simulation studies indicate that 90 percent of the methane can be produced with reinjection. 106 figures.

  2. Geopressured geothermal bibliography. Volume I. Citation extracts. Second edition

    SciTech Connect

    Sepehrnoori, K.; Carter, F.; Schneider, R.; Street, S.; McGill, K.

    1983-05-01

    This annoted bibliography contains 1131 citations. It represents reports, papers, and articles appearing over the past eighteen years covering topics from the scientific and technical aspects of geopressured geothermal reservoirs to the social, environmental, and legal considerations of exploiting those reservoirs for their energy resources. Six indexes include: author, conference title, descriptor, journal title, report number, and sponsor. (MHR)

  3. Analysis of Sweet Lake geopressured-geothermal aquifer

    SciTech Connect

    Andrade, M.; Rago, F.; Ohkuma, H.; Sepehrnoori, K.; Peters, E.; Dorfman, M.

    1982-01-01

    The Sweet Lake geopressured-geothermal aquifer, located southeast of Lake Charles, Louisiana, is modeled by a two-dimensional geopressured-geothermal simulator. This aquifer is a sandstone within the Frio formation at depths between 15,000 to 15,640 ft with a net porous thickness of 250 ft, a calculated in-situ permeability (from drawdown data) of 17 md, an estimated porosity of 24%, a uniaxial compaction coefficient of 4.5 x 10/sup -7/ psi/sup -1/ and a solution gas-water ratio of 11 SCF/STB all at the initial reservoir pressure of 12,060 psi. These parameters are typically pressure sensitive in geopressured-geothermal aquifers and are critically important to aquifer performance. Several simulation experiments are conducted which investigate the effects of varying initial values for these parameters with the experimentally determined values as means. The simulations give both optimistic and pessimistic expectations for aquifer performance. The expected life of the geopressured-geothermal well is reported for each simulation.

  4. Analysis of Sweet Lake geopressured-geothermal aquifer

    SciTech Connect

    Andrade, M.; Rago, F.M.; Ohkuma, H.; Sepehrnoori, K.; Peters, E.; Dorfman, M.

    1983-01-01

    The Sweet Lake geopressured-geothermal aquifer, located southeast of Lake Charles, Louisiana, is an aquifer modeled by a two-dimensional geopressured-geothermal simulator. This aquifer is a sandstone within the Frio formation at depths between 15,000 to 15,640 ft with a net porous thickness of 250 ft, a calculated in-situ permeability (from drawdown data) of 17 md, an estimated porosity of 24 percent, a uniaxial compaction coefficient of 4.5 x 10/sup -7/ psi/sup -1/ and a solution gas-water ratio of 11 SCF/STB all at the initial reservoir pressure of 12,060 psi. These parameters are typically pressure sensitive in geopressured-geothermal aquifers and are critically important to aquifer performance. Several simulation experiments are conducted which investigate the effects of varying initial values for these parameters with the experimentally determined values as means. The simulations give both optimistic and pessimistic expectations for aquifer performance. The expected life of the geopressured-geothermal well is reported for each simulation.

  5. Properties of Geopressured Brines and Wells in the Gulf Coast and Opportunities for Industrial/Research Participation

    SciTech Connect

    Wys, J. Nequs- de

    1989-03-21

    Geopressured reservoirs exhibit pressure gradients in excess of the normal hydrostatic gradient. In the Gulf Coast area the normal gradient is 0.465 psi/ft. Pressures may approach lithostatic pressure and have been measured as high as 1.05 psi/ft in the Gulf Coast area. Geopressured basins exist worldwide and in a number of U.S. locations, east, west, north and south. The Gulf Coast area has been studied extensively and is the subject of the DOE geopressured-geothermal research at present. The assumed ranges in resource characteristics include: depth from -12,000 to > -20,000 feet, brine flow rate from 20,000 to 40,000 bpd, temperature from 300 to 400 F, bottomhole pressure from 12,000 to 18,500 psi; salinity from 20,000 to 200,000 mg/L, gas-water ratio from 40 to 80 scf/bbl., and condensate from a trace to production. Energy in the geopressured resource includes gas, thermal, and hydraulic energy. It has been estimated that there are 6,000 quads of methane and 11,000 quads of thermal energy in the Gulf Coast area geopressured-geothermal reservoirs. Estimates run as high as 50,000 quad for the thermal energy (Wallace et al, 1978). Present industrial interest in the Pleasant Bayou and Hulin wells includes: desalination plants, an economic study by a power company for regional use, use of generated electricity by a coalition of towns, aquaculture (catfish farming) research program, and an unsolicited proposal for enhanced oil recovery of heavy oil. Direct uses of the hot brine cover dozens of industries and processes. An example of multiple uses in the USSR is shown. Outside agency interest includes the U.S.G.S., N.S.F., G.R.I., and possibly other areas within DOE. A research spin-off: a sensitive in-line benzene monitor has been designed by USL and will be tested in the near future. An in-line pH monitor is also under development for the harsh conditions of the geopressured-geothermal wells.

  6. Geopressured geothermal bibliography. Volume II (geopressure thesaurus). Second Edition

    SciTech Connect

    Sepehrnoori, K.; Carter, F.; Schneider, R.; Street, S.; McGill, K.

    1983-05-01

    This thesaurus of terminology associated with the geopressured geothermal energy field has been developed as a part of the Geopressured Geothermal Information System data base. It is a compilation of terms displaying synomymous, hierarchical, and other relationships between terms. These terms, which are called descriptors, constitute the special language of the information retrieval system - the system vocabulary. The function of this thesaurus is to provide a standardized vocabulary for the information storage and retrieval system to facilitate both the indexing and subject-searching processes. In indexing, a thesaurus is used to translate the natural language of the document to be indexed into the standardized system vocabulary and to place the document at the appropriate level of generality or specificity in relation to the other documents in the data base. In subject retrieval, the thesaurus is used to match the natural language used in search requests with the system vocabulary and to find the most appropriate term to represent a concept.

  7. Geopressured-geothermal development and coastal subsidence in Louisiana

    SciTech Connect

    Trahan, D.B.

    1985-01-01

    Elevation changes at the Parcperdue geopressured-geothermal test site in southwestern Louisiana range from 0.8 to 0.16 in/y (+2 to -4 mm/y) and reflect natural base-line movements associated with salt dome growth and the compaction of thick, recent sediments. Natural variation is the primary cause of greater movement at the nearby Rockefeller Refuge geopressured-geothermal test site where base-line movement rates range from -0.43 to -0.55 in/y (-12 to -14 mm/y). Holocene sediments in the coastal marshlands at Rockefeller Refuge are more susceptible to compactional subsidence than upland Pleistocene formations at Parcperdue. Anomalous subsidence at both test sites coincided with site preparation and well drilling and may have been related to loading of surficial soils by the weight of drilling equipment. Elevation changes monitored after drilling and during formation testing were consistent with base-line subsidence rates, indicating that loading was temporary. Anomalous base-line subsidence rates coinciding with areas of historical fluid withdrawal indicate that these effects may outweigh the effects of present geopressured-geothermal development.

  8. Factors controlling reservoir quality in tertiary sandstones and their significance to geopressured geothermal production. Annual report, May 1, 1979-May 31, 1980

    SciTech Connect

    Loucks, R.G.; Richmann, D.L.; Milliken, K.L.

    1980-07-01

    Differing extents of diagenetic modification is the factor primarily responsible for contrasting regional reservoir quality of Tertiary sandstones from the Upper and Lower Texas Gulf Coast. Detailed comparison of Frio sandstones from the Chocolate Bayou/Danbury Dome area, Brazoria County, and Vicksburg sandstones from the McAllen Ranch Field area, Hidalgo County, reveals that extent of diagenetic modification is most strongly influenced by (1) detrital mineralogy and (2) regional geothermal gradients. Vicksburg sandstones from the McAllen Ranch Field area are less stable, chemically and mechanically, than Frio sandstones from the Chocolate Bayou/Danbury dome area. Vicksburg sandstones are mineralogically immature and contain greater proportions of feldspars and rock fragments than do Frio sandstones. Thr reactive detrital assemblage of Vicksubrg sandstones is highly susceptible to diagenetic modification. Susceptibility is enhanced by higher than normal geothermal gradients in the McAllen Ranch Field area. Thus, consolidation of Vicksburg sandstones began at shallower depth of burial and precipitation of authigenic phases (especially calcite) was more pervasive than in Frio sandstones. Moreover, the late-stage episode of ferroan calcite precipitation that occluded most secondary porosity in Vicksburg sandstones did not occur significantly in Frio sandstones. Therefore, regional reservoir quality of Frio sandstones from Brazoria County is far better than that characterizing Vicksburg sandstones from Hidalgo County, especially at depths suitable for geopressured geothermal energy production.

  9. Water Resource Assessment of Geothermal Resources and Water Use in Geopressured Geothermal Systems

    SciTech Connect

    Clark, C. E.; Harto, C. B.; Troppe, W. A.

    2011-09-01

    This technical report from Argonne National Laboratory presents an assessment of fresh water demand for future growth in utility-scale geothermal power generation and an analysis of fresh water use in low-temperature geopressured geothermal power generation systems.

  10. Testing geopressured geothermal reservoirs in existing wells: Detailed completions prognosis for geopressured-geothermal well of opportunity, prospect #1

    SciTech Connect

    Kennedy, Clovis A.

    1980-04-03

    This prospective well of opportunity was originally drilled and completed as a gas producer by Wrightsman Investment Company in early 1973. The original and present producing interval was from 15,216 to 15,238 feet. IMC Exploration Company, Inc. acquired the property from Wrightsman and is the present owner operator. The well is presently shut in s a non-economic producer and IMC proposed to perform plug and abandonment operations in April, 1980. This well has a good geopressured-geothermal water sand behind the 5-1/2 inch casing that has 94 feet of net sand thickness. Pursuant to DOE/NVO authorization of March 11,1980, Eaton negotiated an option agreement with IMC whereby IMC would delay their abandonment operations for a period of 90 days to permit DOE to evaluate the well for geopressure-geothermal testing. The IMC-Eaton option agreements provide that IMG will delay plugging the well until June 15, 1980. If Eaton exercises its option to acquire the well, IMC will sell the well bore, and an adjacent salt water disposal well, to Eaton for the sole consideration of Eaton assuming the obligation to plug and abandon the wells in accordance with lease and regulatory requirements. If Eaton does not exercise its option, then Eaton will pay IMC $95,000 cash and IMC will proceed with plugging and abandonment at the termination of the option period.

  11. Factors controlling reservoir quality in tertiary sandstones and their significance to geopressured geothermal production

    SciTech Connect

    Loucks, R.G.; Richmann, D.L.; Milliken, K.L.

    1981-01-01

    Variable intensity of diagenesis is the factor primarily responsible for contrasting regional reservoir quality of Tertiary sandstones from the upper and lower Texas coast. Detailed comparison of Frio sandstone from the Chocolate Bayou/Danbury Dome area, Brazoria County, and Vicksburg sandstones from the McAllen Ranch Field area, Hidalgo County, reveals that extent of diagenetic modification is most strongly influenced by (1) detrital mineralogy and (2) regional geothermal gradients. The regional reservoir quality of Frio sandstones from Brazoria County is far better than that characterizing Vicksburg sandstones from Hidalgo County, especially at depths suitable for geopressured geothermal energy production. However, in predicting reservoir quality on a site-specific basis, locally variable factors such as relative proportions for porosity types, pore geometry as related to permeability, and local depositional environment must also be considered. Even in an area of regionally favorable reservoir quality, such local factors can significantly affect reservoir quality and, hence, the geothermal production potential of a specific sandstone unit.

  12. Environmental monitoring at designed geopressured-geothermal well sites, Louisiana and Texas

    SciTech Connect

    Groat, C.; Stevenson, D.

    1990-01-01

    The research objectives of this report are to: implement and maintain the ongoing environmental monitoring program around DOE geopressured-geothermal test well in Louisiana and Texas; analyze and interpret collected data for evidence of subsidence and induced microearthquakes which may be brought about by geopressured-geothermal well testing and development; continue geological-geophysical studies of the Hulin and Gladys McCall sites incorporating new seismic data; continue review of previously identified and tested geopressured-geothermal prospects in Louisiana to determine if any link exists between such reservoirs and the existence of free gas in commercial or subcommercial quantities; and initiate review of geology, co-location and properties of geopressured brines with medium and heavy oil reservoirs in Louisiana utilizing existing maps, databases, reports, and journal articles.

  13. Environmental monitoring at designed geopressured-geothermal well sites, Louisiana and Texas

    SciTech Connect

    Not Available

    1991-01-01

    The research objectives of this report are to: implement and maintain the ongoing environmental monitoring program around DOE geopressured-geothermal test wells in Louisiana and Texas; analyze and interpret collected data for evidence of subsidence and induced microearthquakes which may be brought about by geopressured-geothermal well testing and development; continue geological-geophysical studies of the Hulin and Gladys McCall sites incorporating new seismic data; continue review of previously identified and tested geopressured-geothermal prospects in Louisiana to determine if any link exists between such reservoirs and the existence of free gas in commercial or subcommercial quantities; and initiate review of geology, co-location and properties of geopressured brines with medium and heavy oil reservoirs in Louisiana utilizing existing maps, databases, reports, and journal articles. 2 figs.

  14. Gulf Coast geopressured-geothermal reservoir simulation: final task report (year 4). Final report, 1 August 1979-31 July 1980

    SciTech Connect

    MacDonald, R.C.; Sepehrnoori, K.; Ohkuma, H.

    1982-10-01

    The results of the short-term production tests run on the Pleasant Bayou No. 2 well are summarized. These tests were analyzed using conventional pressure test analysis methods. The effects of reservoir heterogeneties onm production behavior and, in particular, permeability distribution and faulting of reservoir sand were studied to determine the sensitivity of recovery to these parameters. A study on the effect of gas buildup around a producing well is reported. (MHR)

  15. Subsurface evaluation of the geopressured-geothermal Chloe Prospect, Calcasieu Parish, Louisiana

    SciTech Connect

    Kurth, R.J.

    1981-12-01

    A 123 square mile area approximately 10 miles east of Lake Charles, Louisiana, has been studied to assess its potential geopressured-geothermal resources. Subsurface information was used to study the structure and stratigraphy of the area as they related to the development of geopressured aquifers. The Middle Frio Hackberry wedge was found to contain the geopressured-geothermal reservoir sand, as well as the shales responsible for the origin and sealing of the geopressured strata. The major reservoir within the wedge is the Hackberry massive A sand.

  16. Gulf Coast Wetlands

    Atmospheric Science Data Center

    2014-05-15

    article title:  Wetlands of the Gulf Coast     ... web of estuarine channels and extensive coastal wetlands that provide important habitat for fisheries. The city of New Orleans ... or below sea level. The city is protected by levees, but the wetlands which also function as a buffer from storm surges have been ...

  17. Testing geopressured geothermal reservoirs in existing wells: Detailed completion prognosis for geopressured-geothermal well of opportunity, prospect #2

    SciTech Connect

    1981-03-01

    A geopressured-geothermal test of Martin Exploration Company's Crown Zellerbach Well No. 2 will be conducted in the Tuscaloosa Trend. The Crown Zellerbach Well No. 1 will be converted to a saltwater disposal well for disposal of produced brine. The well is located in the Satsuma Area, Livingston parish, Louisiana. Eaton proposes to test the Tuscaloosa by perforating the 7 inch casing from 16,718 feet to 16,754 feet. The reservoir pressure at an intermediate formation depth of 16,736 feet is anticipated to be 12,010 psi and the temperature is anticipated to be 297 F. Calculated water salinity is 16,000 ppm. The well is expected to produce a maximum of 16,000 barrels of water a day with a gas content of 51 SCF/bbl. Eaton will re-enter the test well, clean out to 17,000 feet, run production casing and complete the well. The disposal well will be re-entered and completed in the 9-5/8 inch casing for disposal of produced brine. Testing will be conducted similar to previous Eaton annular flow WOO tests. An optional test from 16,462 feet to 16,490 feet may be performed after the original test and will require a workover with a rig on location to perform the plugback. The surface production equipment utilized on previous tests will be utilized on this test. The equipment has worked satisfactorily and all parties involved in the testing are familiar with its operation. Weatherly Engineering will operate the test equipment. The Institute of Gas Technology (IGT) and Mr. Don Clark will handle sampling, testing and reservoir engineering evaluation, respectively. wireline work required will be awarded on basis of bid evaluation. At the conclusion of the test period, the D.O.E. owned test equipment will be removed from the test site, the test and disposal wells plugged and abandoned and the sites restored to the satisfaction of all parties.

  18. Thunderstorm, Texas Gulf Coast, USA

    NASA Image and Video Library

    1990-04-29

    This thunderstorm along the Texas Gulf Coast (29.0N, 95.0W), USA is seen as the trailing edge of a large cloud mass formed along the leading edge of a spring frontal system stretching northwest to southeast across the Texas Gulf Coast. This system brought extensive severe weather and flooding to parts of Texas and surrounding states. Muddy water discharging from coastal streams can be seen in the shallow Gulf of Mexico as far south as Lavaca Bay.

  19. Subsurface and seismic investigation of the geopressured-geothermal potential of south Louisiana. Final report

    SciTech Connect

    Kinsland, G.L.; Paine, W.R.; Duhon, M.P.; Dungan, J.R.; Kurth, R.J.; Moore, D.R.; Lyons, W.S.

    1983-09-01

    Specific sites (areas) for geopressured-geothermal energy potential have been evaluated: (1) Abbeville Area, (2) Chloe Area, (3) Turtle Bayou Field-Kent Bayou Field Area and (4) Lirette-Chauvin-Lake Boudreaux Area. To arrive at geologic conclusions concerning the geopressured-geothermal energy potential of each area, the following factors have been considered in this study: (1) depth of geopressured sands, (2) geopressured sand volumes, (3) porosities, (4) permeabilities, (5) temperatures, (6) salinities, (7) dissolved gas content, (8) structure - especially as it relates to continuity of reservoirs, and (9) petroleum prodution - espeially if the geopressured fluids are driving mechanisms for current petroleum prodution. To evaluate these parameters the most useful source of information has been petroleum well logs which most commonly are a continuous depth survey of the spontaneous potential (SP) and the electrical resistivity of the subsurface formations. A separate thesis for each of the above four areas was processed separately.

  20. Industrial Consortium for the Utilization of the Geopressured-Geothermal Resource. Volume 2

    SciTech Connect

    Negus-deWys, J.

    1990-03-01

    The Geopressured-Geothermal Program, now in its fifteenth year, is entering the transition period to commercial use. The industry cost-shared proposals to the consortium, represented in the presentations included in these proceedings, attest to the interest developing in the industrial community in utilizing the geopressured-geothermal resource. Sixty-five participants attended these sessions, two-thirds of whom represented industry. The areas represented by cost-shared proposals include (1) thermal enhanced oil recovery, (2) direct process use of thermal energy, e.g., aquaculture and agriculture, (3) conversion of thermal energy to electricity, (4) environment related technologies, e.g., use of supercritical processes, and (5) operational proposals, e.g., a field manual for scale inhibitors. It is hoped that from this array of potential use projects, some will persist and be successful in proving the viability of using the geopressured-geothermal resource. Such industrial use of an alternative and relatively clean energy resource will benefit our nation and its people.

  1. Industrial Consortium for the Utilization of the Geopressured-Geothermal Resource. Volume 1

    SciTech Connect

    Negus-deWys, J.

    1990-03-01

    The Geopressured-Geothermal Program, now in its fifteenth year, is entering the transition period to commercial use. The industry cost-shared proposals to the consortium, represented in the presentations included in these proceedings, attest to the interest developing in the industrial community in utilizing the geopressured-geothermal resource. Sixty-five participants attended these sessions, two-thirds of whom represented industry. The areas represented by cost-shared proposals include (1) thermal enhanced oil recovery, (2) direct process use of thermal energy, e.g., aquaculture and agriculture, (3) conversion of thermal energy to electricity, (4) environment related technologies, e.g., use of supercritical processes, and (5) operational proposals, e.g., a field manual for scale inhibitors. It is hoped that from this array of potential use projects, some will persist and be successful in proving the viability of using the geopressured-geothermal resource. Such industrial use of an alternative and relatively clean energy resource will benefit our nation and its people.

  2. Well Test Analysis and Improved Models for Geopressured-Geothermal Systems

    SciTech Connect

    Riney, T.D.

    1990-12-01

    In accordance with the S-CUBED Subcontract Work Statement, S-CUBED has concentrated on the synthesis, correlation and analysis of all pertinent data from the Department of Energy (DOE) geopressured-geothermal research wells undergoing testing during the contract period. This work has included the development of reservoir simulation models for the geopressured-geothermal resource in hydrological connection with each well. Existing S-CUBED simulation techniques have been applied to develop, update and improve the models for the reservoirs tested. During the contract period, data have been available from the Gladys McCall, Pleasant Bayou and Hulin test wells. S-CUBED has also contributed to the design of the well tests and participated in DOE's planning and review meetings in support of the geopressured-geothermal program. Detailed technical Topical Reports have been prepared and issued as appropriate during the contract period as referenced in the following summary of the work performed during the final year of the S-CUBED Subcontract to UTA.

  3. Evidence of regional subsidence and associated interior wetland loss induced by hydrocarbon production, Gulf Coast region, USA

    NASA Astrophysics Data System (ADS)

    Morton, Robert A.; Bernier, Julie C.; Barras, John A.

    2006-05-01

    Analysis of remote images, elevation surveys, stratigraphic cross-sections, and hydrocarbon production data demonstrates that extensive areas of wetland loss in the northern Gulf Coast region of the United States were associated with large-volume fluid production from mature petroleum fields. Interior wetland losses at many sites in coastal Louisiana and Texas are attributed largely to accelerated land subsidence and fault reactivation induced by decreased reservoir pressures as a result of rapid or prolonged extraction of gas, oil, and associated brines. Evidence that moderately-deep hydrocarbon production has induced land-surface subsidence and reactivated faults that intersect the surface include: (1) close temporal and spatial correlation of fluid production with surficial changes including rapid subsidence of wetland sediments near producing fields, (2) measurable offsets of shallow strata across the zones of wetland loss, (3) large reductions in subsurface pressures where subsidence rates are high, (4) coincidence of orientation and direction of displacement between surface fault traces and faults that bound the reservoirs, and (5) accelerated subsidence rates near producing fields compared to subsidence rates in surrounding areas or compared to geological rates of subsidence. Based on historical trends, subsidence rates in the Gulf Coast region near producing fields most likely will decrease in the future because most petroleum fields are nearly depleted. Alternatively, continued extraction of conventional energy resources as well as potential production of alternative energy resources (geopressured-geothermal fluids) in the Gulf Coast region could increase subsidence and land losses and also contribute to inundation of areas of higher elevation.

  4. Evidence of regional subsidence and associated interior wetland loss induced by hydrocarbon production, Gulf Coast region, USA

    USGS Publications Warehouse

    Morton, R.A.; Bernier, J.C.; Barras, J.A.

    2006-01-01

    Analysis of remote images, elevation surveys, stratigraphic cross-sections, and hydrocarbon production data demonstrates that extensive areas of wetland loss in the northern Gulf Coast region of the United States were associated with large-volume fluid production from mature petroleum fields. Interior wetland losses at many sites in coastal Louisiana and Texas are attributed largely to accelerated land subsidence and fault reactivation induced by decreased reservoir pressures as a result of rapid or prolonged extraction of gas, oil, and associated brines. Evidence that moderately-deep hydrocarbon production has induced land-surface subsidence and reactivated faults that intersect the surface include: (1) close temporal and spatial correlation of fluid production with surficial changes including rapid subsidence of wetland sediments near producing fields, (2) measurable offsets of shallow strata across the zones of wetland loss, (3) large reductions in subsurface pressures where subsidence rates are high, (4) coincidence of orientation and direction of displacement between surface fault traces and faults that bound the reservoirs, and (5) accelerated subsidence rates near producing fields compared to subsidence rates in surrounding areas or compared to geological rates of subsidence. Based on historical trends, subsidence rates in the Gulf Coast region near producing fields most likely will decrease in the future because most petroleum fields are nearly depleted. Alternatively, continued extraction of conventional energy resources as well as potential production of alternative energy resources (geopressured-geothermal fluids) in the Gulf Coast region could increase subsidence and land losses and also contribute to inundation of areas of higher elevation. ?? Springer-Verlag 2006.

  5. The Geopressured-Geothermal Program: Energy conversion status and future possibilities

    SciTech Connect

    Negus-de Wys, J.; Lawford, T.W.; Faulder, D.D. )

    1989-01-01

    The Geopressured-Geothermal Program, sponsored by the Department of Energy (DOE) began in 1976 with the Wells of Opportunity. This early research concentrated on resource characterization at several locations in Texas and Louisiana. More recently, the program has included well operations and supporting university research in geoscience and engineering. Long term flow testing, reinjection of brine, and scale prevention were accomplished at the Gladys McCall Well. The Pleasant Bayou Well provided additional data for modeling and predicting geopressured reservoir behavior. This year a hybrid power system (HPS) was constructed at Pleasant Bayou in cooperation with the Electric Power Research Institute (EPRI). This is the first conversion of the geopressured-geothermal resource to electricity. An economic review of geopressured-geothermal resource development concludes that using off-the-shelf technology, electricity can be produced for $0.125/kWh from a Gladys McCall type resource (40,000 bpd brine production, 27 scf methane/bbl, 288{degree}F brine, and 10-year resource life). The Pleasant Bayou type resource can produce electricity for $0.32/kWh. Advanced technology could reduce the cost to $0.16/kWh. A review and status of the HPS is presented with future possibilities for the program, including (1) recovery of medium and heavy oil with hot geopressured brine, (2) direct use, especially aquaculture, and (3) development and use of advanced technology for conversion at the Hulin Well, the deepest, hottest well in the program. The estimated improvement in efficiencies with advanced conversion technology range from 100 to 160%. This would greatly reduce the cost to produce electricity. 6 refs., 7 figs., 2 tabs.

  6. Microseismic monitoring of Chocolate Bayou, Texas: The Pleasant Bayou no. 2 geopressured/geothermal energy test well program

    NASA Astrophysics Data System (ADS)

    Mauk, F. J.; Kimball, B.; Davis, R. A.

    The Brazoria seismic network, instrumentation, design, and specifications are described. The data analysis procedures are presented. Seismicity is described in relation to the Pleasant Bayou production history. Seismicity originating near the chemical plant east of the geopressured/geothermal well is discussed.

  7. Microseismic monitoring of Chocolate Bayou, Texas: the Pleasant Bayou No. 2 geopressured/geothermal energy test well program

    SciTech Connect

    Mauk, F.J.; Kimball, B.; Davis, R.A.

    1984-01-01

    The Brazoria seismic network, instrumentation, design, and specifications are described. The data analysis procedures are presented. Seismicity is described in relation to the Pleasant Bayou production history. Seismicity originating near the chemical plant east of the geopressured/geothermal well is discussed. (MHR)

  8. Upper Texas Gulf Coast, USA

    NASA Technical Reports Server (NTRS)

    1989-01-01

    The Upper Texas Gulf Coast (29.0N, 95.5W) is clearly represented in this view from space. The area covered stretches almost 300 miles from Aransas Pass, on the Texas coast in the south to Cameron, Louisiana in the north. The sharp detail of both the natural and cultural features throughout the scene is especially evident in the Houston area where highways, major streets, airport runways and even some neighborhood lanes can be easily seen.

  9. The feasibility of recovering medium to heavy oil using geopressured- geothermal fluids

    SciTech Connect

    Negus-de Wys, J.; Kimmell, C.E.; Hart, G.F.; Plum, M.M.

    1991-09-01

    The feasibility, economics and environmental concerns of producing more domestic oil using thermal enhanced oil recovery (TEOR) are reviewed and the unique nature of geopressured-geothermal (GPGT) fluids for thermal recovery are outlined. Current methods of TEOR are briefly discussed and it is noted that these methods are presently under scrutiny by both federal and state air quality agencies; and moreover, they often involve costly operational and mechanical problems associated with heating water on the surface for injection into the target reservoir. The characteristics of the GPGT resources as seen through previous Department of Energy (DOE) studies from sites in Louisiana and Texas are discussed. These studies indicate sufficient quantities of GPGT fluids can be produced to sustain a TEOR project. The Alworth Field in the south Texas Mirando Trend is proposed as a TEOR pilot site. The target reservoirs for injection of the GPGT fluids are the Jackson and Yegua sandstones of the upper Eocene Epoch. The reservoirs contain an estimated 4 MMbbls of heavy oil in place (OIP) (18.6{degree}API) of which it is estimated that at least 1 MMbbls could be recovered by TEOR. The problems associated with using the GPGT fluids for TEOR include those normally associated with hot water flooding but in addition the reaction of the brine from the geopressured-geothermal reservoir with the target reservoir is uncertain. Under the elevated temperatures associated with GPGT TEOR, actual increased porosity and permeability are possible. 120 refs., 40 figs., 13 tabs.

  10. Geopressured Geothermal Resource and Recoverable Energy Estimate for the Wilcox and Frio Formations, Texas (Presentation)

    SciTech Connect

    Esposito, A.; Augustine, C.

    2011-10-01

    An estimate of the total and recoverable geopressured geothermal resource of the fairways in the Wilcox and Frio formations is made using the current data available. The flow rate of water and methane for wells located in the geopressured geothermal fairways is simulated over a 20-year period utilizing the TOUGH2 Reservoir Simulator and research data. The model incorporates relative permeability, capillary pressure, rock compressibility, and leakage from the bounding shale layers. The simulations show that permeability, porosity, pressure, sandstone thickness, well spacing, and gas saturation in the sandstone have a significant impact on the percent of energy recovered. The results also predict lower average well production flow rates and a significantly higher production of natural gas relative to water than in previous studies done from 1975 to 1980. Previous studies underestimate the amount of methane produced with hot brine. Based on the work completed in this study, multiphase flow processes and reservoir boundary conditions greatly influence the total quantity of the fluid produced as well as the ratio of gas and water in the produced fluid.

  11. Reservoir Modeling and Prediction at Pleasant Bayou Geopressured-Geothermal Reservoir

    SciTech Connect

    Shook, Mike

    1992-03-24

    Modeling and prediction of geopressured-geothermal reservoirs is an excellent example of an engineering problem that can be solved through many different means. The problem may be approached from a purely numerical viewpoint, where a successful history match ''demonstrates'' the validity of the reservoir model, or from an analytical point of view. Each method has its own inherent limitations and weaknesses. Such limitations can be minimized by using some combination of both numerical and analytical methods, taking advantage of the strengths of each without the attendant weaknesses. This paper describes a combined numerical/analytical approach to reservoir engineering at the Pleasant Bayou geopressured-geothermal reservoir. A reservoir description had previously been developed, through which a successful history match was performed. Certain details of the reservoir can also be obtained through analysis of pressure and flow transients; these can then be used to constrain the numerical model. Methods for extracting such reservoir data are discussed, and the manner in which they can be used as constraints in the numerical models are presented.

  12. Pleasant Bayou geopressured/geothermal testing project, Brazoria County, Texas. Final report

    SciTech Connect

    Ortego, P.K.

    1985-07-01

    Phase II-B production testing of the Pleasant Bayou No. 2 well began September 22, 1982. The test plan was designed to evaluate the capabilities of the geopressured-geothermal reservoir during an extended flow period. Tests were conducted to determine reservoir areal extent; aquifer fluid properties; fluid property change with production; information on reservoir production drive mechanism; long-term scale and corrosion control methods; and disposal well operations. Operatinal aspects of geopressured-geothermal production were also evaluated. The test was discontinued prematurely in May 1983 because of a production tubing failure. Most of the production tubing was recovered from the well and cause of the failure was determined. Plans for recompletion of the well were prepared. However, the well was not recompleted because of funding constraints and/or program rescheduling. In March 1984, the Department of Energy, Nevada Operations Office (DOE/NV) directed that the site be placed in a standby-secured condition. In August 1984, the site was secured. Routine site maintenance and security was provided during the secured period.

  13. Geologic, geophysical, and geochemical aspects of site-specific studies of the geopressured-geothermal energy resource of southern Louisiana. Final report

    SciTech Connect

    Pilger, R.H. Jr.

    1985-01-01

    The report consists of four sections dealing with progress in evaluating geologic, geochemical, and geophysical aspects of geopressured-geothermal energy resources in Louisiana. Separate abstracts have been prepared for the individual sections. (ACR)

  14. Contractor for geopressured-geothermal sites: Final contract report, Volume 1, fiscal years 1986--1990 (5 years), testing of wells through October 1990

    SciTech Connect

    Not Available

    1992-09-01

    Field tests and studies were conducted to determine the production behavior of geopressured-geothermal reservoirs and their potential as future energy sources. Results are presented for Gladys McCall Site, Pleasant Bayou Site, and Hulin Site.

  15. Investigation and evaluation of geopressured-geothermal wells. Summary of Gruy Federal's Well-of-Opportunity Program to January 31, 1980

    SciTech Connect

    Not Available

    1980-03-01

    Scouting and monitoring techniques peculiar to geopressured-geothermal wells and legal problems are presented. The following are tabulated: priority wells actively monitored, industry contacts, and the summary of industry responses to well-or-opportunity solicitation. (MHR)

  16. Gasification of Gulf Coast Lignites

    SciTech Connect

    Smoller, R.K.

    1983-11-01

    Gulf Coast lignites are examined as a feedstock for a gasification facility making substitute natural gas (SNG). Advantages and disadvantages are explored in the areas of project development factors, gasification technology and physical and chemical characteristics of the lignite. The Texas Gasification Project currently under study at Phillips Coal is used to exemplify these factors. It has been found that the use of Gulf Coast lignite has several natural developmental advantages over fuels from other parts of the U.S. A project is relatively close to markets for all of its products including SNG, carbon dioxide and all by-products. The Gulf Coast has adequate supplies of basic commodities such as water. Most potential gasification plant locations have a good local infrastructure in existence. Labor can be drawn from one or more metropolitan areas within commuting distance. State regulatory agencies interact with energy development projects of all sizes on a regular basis providing a solid working knowledge of energy policies and accepted project development guidelines. Finally, a positive business climate exists at both the state and local levels providing support and encouragement to go forward with projects. The physical and chemical characteristics of the lignite are shown to have a major effect on the operability of the gasification process. Lignite properties examined include moisture content, friability, and ash content.

  17. Laboratory determination of mechanical properties of rocks from the Parcperdue geopressured/geothermal site

    SciTech Connect

    Sinha, K.P.; Borschel, T.F.; Holland, M.T.; Schatz, J.F.; Bebout, D.G.; Bachman, A.L.

    1981-01-01

    The deformational behavior and fluid flow characteristics of rock samples obtained from DOW/DOE L.R. Sweezy No. 1 Test Well at the Parcperdue Geopressured/Geothermal Site have been investigated in the laboratory. Elastic moduli, compressibility, uniaxial compaction coefficient, strength, creep parameters, permeability, acoustic velocites (all at reservoir conditions) and changes in these quantities induced by simulated reservoir production have been obtained from tests on several sandstone and shale samples from different depths. Tests consisting of several hydrostatic and triaxial loading phases and pore pressure reduction were designed to provide measurements to be used for calculating several of the above mentioned parameters in a single test. Pore volume changes were measured during some phases of the tests.

  18. Gas-turbine-topped hybrid power plants for the utilization of geopressured geothermal resources

    NASA Astrophysics Data System (ADS)

    Khalifa, H. E.

    1981-01-01

    The paper presents an analysis of the performance and economics of a novel hybrid energy conversion system that would efficiently utilize the methane, hydraulic and thermal energy produced by geopressured-geothermal resources. The novel system comprises a methane-fueled gas turbine whose waste heat is used to superheat the vapor generated from the geopressured brine in an otherwise-conventional double-flash power plant. The analysis indicates that, compared to a conventional double-flash system, the hybrid system can generate nearly 44 percent more work from the thermal energy of the brine, in addition to the outputs of the gas and hydraulic turbines. Conservative preliminary economic estimates indicate that the unit installed cost of the hybrid plant would be about 25 percent lower than that of a conventional system constructed at the same geopressured resource site.

  19. Geopressured geothermal resource potential of Miocene Bayou Hebert Prospect, Vermilion and Iberia parishes, Louisiana

    SciTech Connect

    McCulloh, R.P.; Pino, M.A.; Bebout, D.G.; Bachman, A.L.

    1981-01-01

    The Bayou Hebert prospect is a fault-bounded block of lower Miocene shale and sandstone which covers a 75-square-mile area in southeastern Vermilion and southwestern Iberia parishes, southwestern Louisiana. The average depth to the top of the geopressured zone is 12,500 feet. Detailed correlation of shale resistivity patterns on well logs from this area has delineated faults, local unconformities, and changes in thickness and facies of lithologic units. Most faults revealed by this method are associated with the boundary fault zones, but the few delineated in the interior of the prospect could reduce the volume of potential reservoir units. Cross sections show that the lower Miocene section thickens across growth faults by addition of new units as well as by expansion. Of the parameters of reservoir volume, salinity, temperature, and permeability, reservoir volume shows the most significant variation and indicates that the eastern fourth of the prospect has the most geopressured geothermal potential.

  20. The variable pressure supercritical Rankine cycle for integrated natural gas and power production from the geopressured geothermal resource

    NASA Astrophysics Data System (ADS)

    Goldsberry, F. L.

    1982-03-01

    A small-scale power plant cycle that utilizes both a variable pressure vaporizer (heater) and a floating pressure (and temperature) air-cooled condenser is described. Further, it defends this choice on the basis of classical thermodynamics and minimum capital cost by supporting these conclusions with actual comparative examples. The application suggested is for the geopressured geothermal resource. The arguments cited in this application apply to any process (petrochemical, nuclear, etc.) involving waste heat recovery.

  1. Subsurface geology and geopressured/geothermal resource evaluation of the Lirette-Chauvin-Lake Boudreaux area, Terrebonne Parish, Louisiana

    SciTech Connect

    Lyons, W.S.

    1982-12-01

    The geology of a 125 square mile area located about 85 miles southeast of Baton Rouge and about 12 miles southeast of Houma, Louisiana, has been studied to evaluate its potential for geopressured/geothermal energy resources. Structure, stratigraphy, and sedimentation were studied in conjunction with pressure and temperature distributions over a broad area to locate and identify reservoirs that may be prospective. Recommendations concerning future site specific studies within the current area are proposed based on these findings.

  2. Fiscal Year 1992 Annual Operating Plan for the Geopressured-Geothermal Research Program ($4.3 Million Budget)

    SciTech Connect

    1991-08-01

    This plan describes the Geopressured-Geothermal Research Program. A Geopressured well in Texas (Pleasant Bayou) will undergo a slow test and a pressure buildup test. A geopressured well in Louisiana (Gladys McCall) will be flow tested for a short period, logged, plugged and abandoned or turned over to industry early in FY 92. A second deep geopressured well in Louisiana, the Hulin Well, is being kept on standby. Related university research in geology, numerical reservoir modeling, subsidence, microseismicity, and water quality will continue, with program data reviews initiated in appropriate areas. Increased emphasis on integrated reservoir engineering will be implemented. The well activities coupled with the related university research are designed to improve the ability to forecast reservoir productive capacity, to verify the reliability of the resource as a long-term energy resource, and to determine the environmental effects of long-term production. By these means, the Geopressured-Geothermal Research Program is developing a solid technology base that private industry can use to evaluate the geopressured-geothermal resource. The Industrial Consortium for utilization of the resource will be continued. Use projects in Louisiana and Texas will be evaluated. A geopressured reservoir review will be managed by INEL. The DOE Field Office, Idaho will make preparations to complete the program. [DJE-2005

  3. Upper Texas Gulf Coast, USA

    NASA Image and Video Library

    1989-05-08

    STS030-152-066 (4-8 May 1989) --- The upper Texas and Louisiana Gulf Coast area was clearly represented in this large format frame photographed by the astronaut crew of the Earth-orbiting Space Shuttle Atlantis. The area covered stretches almost 300 miles from Aransas Pass, Texas to Cameron, Louisiana. The sharp detail of both the natural and cultural features noted throughout the scene is especially evident in the Houston area, where highways, major streets, airport runways and even some neighborhood lanes are easily seen. Other major areas seen are Austin, San Antonio and the Golden Triangle. An Aero Linhof camera was used to expose the frame.

  4. Gulf Coast Community College's Memory Project

    ERIC Educational Resources Information Center

    Burrell, Matthew D.

    2005-01-01

    Gulf Coast Community College in Panama City, Florida, is celebrating a fifty-year anniversary in 2007. Maintained by the library, the school's archives represent the historical contributions on a local and national level. Gulf Coast Community College library is ensuring the school's historical significance through the digitization of its…

  5. Gulf Coast Community College's Memory Project

    ERIC Educational Resources Information Center

    Burrell, Matthew D.

    2005-01-01

    Gulf Coast Community College in Panama City, Florida, is celebrating a fifty-year anniversary in 2007. Maintained by the library, the school's archives represent the historical contributions on a local and national level. Gulf Coast Community College library is ensuring the school's historical significance through the digitization of its…

  6. Subsurface geology and potential for geopressured-geothermal energy in the Turtle Bayou field-Kent Bayou field area, Terrebonne Parish, Louisiana

    SciTech Connect

    Moore, D.R.

    1982-09-01

    A 216 square mile area approximately 65 miles southwest of New Orleans, Louisiana, has been geologically evaluated to determine its potential for geopressured-geothermal energy production. The structural and stratigraphic analyses were made with emphasis upon the Early and Middle Miocene age sediments which lie close to and within the geopressured section. Three geopressured sands, the Robulus (43) sand, Cibicides opima sand, and Cristellaria (I) sand, are evaluated for their potential of producing geothermal energy. Two of these sands, the Robulus (43) sand and the Cibicides opima sand, meet several of the United States Department of Energy's suggested minimum requirements for a prospective geopressured-geothermal energy reservoir.

  7. Methods for collection and analysis of geopressured geothermal and oil field waters

    USGS Publications Warehouse

    Lico, Michael S.; Kharaka, Yousif K.; Carothers, William W.; Wright, Victoria A.

    1982-01-01

    Present methods are described for the collection, preservation, and chemical analysis of waters produced from geopressured geothermal and petroleum wells. Detailed procedures for collection include precautions and equipment necessary to ensure that the sample is representative of the water produced. Procedures for sample preservation include filtration, acidification, dilution for silica, methyl isobutyl ketone (MIBK) extraction of aluminum, addition of potassium permanganate to preserve mercury, and precipitation of carbonate species as strontium carbonate for stable carbon isotopes and total dissolved carbonate analysis. Characteristics determined at the well site are sulfide, pH, ammonia, and conductivity. Laboratory procedures are given for the analysis of lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, barium, iron, manganese, zinc, lead, aluminum, .and mercury by atomic absorption and flame emission spectroscopy. Chloride is determined by silver nitrate titration and fluoride by ion-specific electrode. Bromide and iodide concentrations are determined by the hypochlorite oxidation method. Sulfate is analyzed by titration using barium chloride with thorin indicator after pretreatment with alumina. Boron and silica are determined colorimetrically by the carmine and molybdate-blue methods, respectively. Aliphatic acid anions (C2 through C5) are determined by gas chromatography after separation and concentration in a chloroform-butanol mixture.

  8. Geology of the Gladys McCall geopressured-geothermal prospect, Cameron Parish, Louisiana

    SciTech Connect

    John, C.J.

    1988-12-01

    The Gladys McCall prospect lies at the western edge of the Rockefeller Wildlife Refuge about 88 km (55 mi) southeast of Lake Charles in Cameron Parish, Louisiana. The test well is 4825 m (15,831 ft) deep and was drilled in 1981 under the U.S. Department of Energy geopressured-geothermal research program. The well was shut in at the end of October 1987 after it had produced over 27 million barrels of brine and 676 MMscf gas, without any significant pressure decline. The stratigraphic section seen in this test well consists of alternating sandstones and shales with about 350 m (1150 ft) of net sand between 4393 m (14,412 ft) and 4974 m (16,320 ft). The producing reservoir is bounded on the north and south by faults. The east-west dimension is poorly defined due to lack of deep well control. Eleven prospective production zones have been identified. The pressure maintenance and the continuous high brine yield from the reservoir may be due to laterally overlapping and connected sandstones, communication between overlying and/or underlying reservoirs, growth faults acting as passageways for brine, shale dewatering, or possible communication of zones behind the casing.

  9. Methods for collection and analysis of geopressured geothermal and oil field waters

    SciTech Connect

    Lico, M.S.; Kharaka, Y.K.; Carothers, W.W.; Wright, V.A.

    1982-01-01

    Present methods are described for the collection, preservation, and chemical analysis of waters produced from geopressured geothermal and petroleum wells. Detailed procedures for collection include precautions and equipment necessary to ensure that the sample is representative of the water produced. Procedures for sample preservation include filtration, acidification, dilution for silica, methyl isobutyl ketone (MIBK) extraction of aluminum, addition of potassium permanganate to preserve mercury, and precipitation of carbonate species as strontium carbonate for stable carbon isotopes and total dissolved carbonate analysis. Characteristics determined at the well site are sulfide, pH, ammonia, and conductivity. Laboratory procedures are given for the analysis of lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, barium, iron, manganese, zinc, lead, aluminum, and mercury by atomic absorption and flame emission spectroscopy. Chloride is determined by silver nitrate titration and fluoride by ion-specific electrode. Bromide and iodide concentrations are determined by the hypochlorite oxidation method. Sulfate is analyzed by titration using barium chloride with thorin indicator after pretreatment with alumina. Boron and silica are determined colorimetrically by the carmine and molybdate-blue methods, respectively. Aliphatic acid anions (C/sub 2/ through C/sub 5/) are determined by gas chromatography after separation and concentration in a chloroform-butanol mixture.

  10. Environmental analysis of geopressured-geothermal prospect areas, De Witt and Colorado counties, Texas. Final report, March 1 - August 31, 1979

    SciTech Connect

    Gustavson, T.C.; Reeder, F.S.; Badger, E.A.

    1980-02-01

    Information collected and analyzed for a preliminary environmental analysis of geopressured geothermal prospect areas in Colorado and DeWitt Counties, Texas is presented. Specific environmental concerns for each geopressured geothermal prospect area are identified and discussed. Approximately 218 km/sup 2/(85 mi/sup 2/) were studied in the vicinity of each prospect area to: (1) conduct an environmental analysis to identify more and less suited areas for geopressured test wells; and (2) provide an environmental data base for future development of geopressured geothermal energy resources. A series of maps and tables are included to illustrate environmental characteristics including: geology, water resources, soils, current land use, vegetation, wildlife, and meteorological characteristics, and additional relevant information on cultural resources, power- and pipelines, and regulatory agencies. A series of transparent overlays at the scale of the original mapping has also been produced for the purposes of identifying and ranking areas of potential conflict between geopressured geothermal development and environmental characteristics. The methodology for ranking suitability of areas within the two prospect areas is discussed in the appendix. (MHR)

  11. Screening of three proposed DOE geopressured-geothermal aquifer natural gas project areas for potential conflicting commercial production: Freshwater Bayou, Lake Theriot, and Kaplan, Louisiana

    SciTech Connect

    Knutson, C.F.; Rogers, L.A.

    1982-02-01

    Three proposed DOE geopressured geothermal prospects defined by the Louisiana State University resource assessment group were screened for possible conflict with existing gas production. The analysis used the public records available at the Louisiana Department of Conservation offices in Baton Rouge and structural and statigraphic interpretations made by the L.S.U. resource assessment group. (MHR)

  12. G. M. Koelemay well No. 1, Jefferson County, Texas. Volume I. Completion and testing: testing geopressured geothermal reservoirs in existing wells. Final report

    SciTech Connect

    Not Available

    1980-01-01

    The acquisition, completion, and testing of a geopressured-geothermal well are described. The following are covered: geology; petrophysics; re-entry and completion operations - test well; drilling and completion operations - disposal well; test objectives; surface testing facilities; pre-test operations; test sequence; test results and analysis; and return of wells and location to operator. (MHR)

  13. A geopressured-geothermal, solar conversion system to produce potable water

    NASA Astrophysics Data System (ADS)

    Nitschke, George Samuel

    A design is presented for recovering Geopressured-Geothermal (GPGT) reservoir brines for conversion into solar ponds to renewably power coastal seawater desalination. The hot, gas-cut, high-pressure GPGT brine is flowed through a well-bore to surface systems which concentrate the brine in multi-effect evaporators and recover the gas. The gas and distilled water are used for thermal enhanced oil recovery, and the concentrated brine is used to construct solar ponds. The thermal energy from the solar ponds is used to produce electricity, which is then used to renewably power coastal desalination plants for large-scale potable water production from the sea. The design is proposed for deployment in California and Texas, where the two largest U.S. GPGT basins exist. Projections show that the design fully deployed in California could provide 5 MAF/y (million acre-ft per year) while yielding a 45% Rate of Return (combined oil and water revenues); the California municipal water load is 10 MAF/y. The dissertation contains a feasibility study of the design approach, supported by engineering analyses and simulation models, included in the appendices. A range of systems configurations and GPGT flow conditions are modeled to illustrate how the approach lends itself to modular implementation, i.e., incrementally installing a single system, tens of systems, up to 1000 systems, which corresponds to full deployment in California for the scenario analyzed. The dissertation includes a method for launching and piloting the approach, starting from a single system installation.

  14. Design and operation of a geopressurized-geothermal hybrid cycle power plant

    SciTech Connect

    Campbell, R.G.; Hattar, M.M.

    1991-02-01

    Geopressured-geothermal resources can contribute significantly to the national electricity supply once technical and economic obstacles are overcome. Power plant performance under the harsh conditions of a geopressured resource was unproven, so a demonstration power plant was built and operated on the Pleasant Bayou geopressured resource in Texas. This one megawatt facility provided valuable data over a range of operating conditions. This power plant was a first-of-a-kind demonstration of the hybrid cycle concept. A hybrid cycle was used to take advantage of the fact that geopressured resources contain energy in more than one form -- hot water and natural gas. Studies have shown that hybrid cycles can yield thirty percent more power than stand-alone geothermal and fossil fuel power plants operating on the same resource. In the hybrid cycle at Pleasant Bayou, gas was burned in engines to generate electricity directly. Exhaust heat from the engines was then combined with heat from the brine to generate additional electricity in a binary cycle. Heat from the gas engine was available at high temperature, thus improving the efficiency of the binary portion of the hybrid cycle. Design power output was achieved, and 3445 MWh of power were sold to the local utility over the course of the test. Plant availability was 97.5% and the capacity factor was over 80% for the extended run at maximum power production. The hybrid cycle power plant demonstrated that there are no technical obstacles to electricity generation at Pleasant Bayou. 14 refs., 38 figs., 16 tabs.

  15. Technical support for geopressured-geothermal well activities in Louisiana; Final report, 1 January 1992--31 December 1993

    SciTech Connect

    John, C.J.

    1994-01-01

    The US Department of Energy has operated continuous-recording, microearthquake monitoring networks at geopressured-geothermal test well sites since 1980. These microseismic networks were designed to detect microearthquakes indicative of fault activation and/or subsidence that can potentially result from the deep subsurface withdrawal and underground disposal of large volumes of brine during well testing. Seismic networks were established before the beginning of testing to obtain background levels of seismicity. Monitoring continued during testing and for some time after cessation of flow testing to assess any delayed microseismicity caused by the time dependence of stress migration within the earth. No flow testing has been done at the Hulin well since January 1990, and the Pleasant Bayou well has been shut down since September 1992. Microseismic monitoring continued at the Hulin and Pleasant Bayou sites until 31 December 1992, at which time both operations were shut down and field sites dismantled. During 1992, the networks recorded seismic signals from earthquakes, sonic booms, geophysical blasting, thunderstorms, etc. However, as in previous years, no local microseismic activity attributable to geopressured-geothermal well testing was recorded.

  16. Gulf Coast Clean Energy Application Center

    SciTech Connect

    Dillingham, Gavin

    2013-09-30

    The Gulf Coast Clean Energy Application Center was initiated to significantly improve market and regulatory conditions for the implementation of combined heat and power technologies. The GC CEAC was responsible for the development of CHP in Texas, Louisiana and Oklahoma. Through this program we employed a variety of outreach and education techniques, developed and deployed assessment tools and conducted market assessments. These efforts resulted in the growth of the combined heat and power market in the Gulf Coast region with a realization of more efficient energy generation, reduced emissions and a more resilient infrastructure. Specific t research, we did not formally investigate any techniques with any formal research design or methodology.

  17. Wetlands of the Gulf Coast

    NASA Image and Video Library

    2001-11-21

    This set of images from NASA Terra satellit highlights coastal areas of four states along the Gulf of Mexico: Louisiana, Mississippi, Alabama and part of the Florida panhandle. The images were acquired on October 15, 2001 Terra orbit 9718.

  18. 3 CFR - Long-Term Gulf Coast Restoration Support Plan

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 3 The President 1 2011-01-01 2011-01-01 false Long-Term Gulf Coast Restoration Support Plan Presidential Documents Other Presidential Documents Memorandum of June 30, 2010 Long-Term Gulf Coast... help the Gulf Coast and its people recover from this tragedy. A long-term plan to restore the unique...

  19. Rickettsiae in Gulf Coast Ticks, Arkansas, USA

    PubMed Central

    Steelman, C. Dayton; Szalanski, Allen L.; Williamson, Phillip C.

    2010-01-01

    To determine the cause of spotted fever cases in the southern United States, we screened Gulf Coast ticks (Amblyomma maculatum) collected in Arkansas for rickettsiae. Of the screened ticks, 30% had PCR amplicons consistent with Rickettsia parkeri or Candidatus Rickettsia amblyommii. PMID:20409375

  20. Testing geopressured geothermal reservoirs in existing wells. Wells of Opportunity Program final contract report, 1980-1981

    SciTech Connect

    Not Available

    1982-01-01

    The geopressured-geothermal candidates for the Wells of Opportunity program were located by the screening of published information on oil industry activity and through direct contact with the oil and gas operators. This process resulted in the recommendation to the DOE of 33 candidate wells for the program. Seven of the 33 recommended wells were accepted for testing. Of these seven wells, six were actually tested. The first well, the No. 1 Kennedy, was acquired but not tested. The seventh well, the No. 1 Godchaux, was abandoned due to mechanical problems during re-entry. The well search activities, which culminated in the acceptance by the DOE of 7 recommended wells, were substantial. A total of 90,270 well reports were reviewed, leading to 1990 wells selected for thorough geological analysis. All of the reservoirs tested in this program have been restricted by one or more faults or permeability barriers. A comprehensive discussion of test results is presented.

  1. Operations research and systems analysis of geopressured-geothermal energy in Louisiana. Final report for the period June 1, 1978-August 31, 1979

    SciTech Connect

    Johnson, A.E. Jr.

    1980-11-01

    The primary purpose was to provide a projection of the probable future contribution of the geopressured-geothermal energy resource in Louisiana to the overall energy requirements of the nation. A number of associated objectives were emphasized: namely, development of the tools and methodology for performing economic analyses, application of these tools to specific prospects about which adequate resource assessments have been made, identification of the impediments to resource development, and socio-economic analysis of the impact of development of the resource on these specific prospects. An overview of the geopressured-geothermal resource activities in Louisiana is provided first, followed by a detailed discussion and review of the achievements of this project. Finally the major conclusions and findings of this project with respect to commercial viability, impediments, and social and economic impact are presented, and recommendations are made for future systems analysis work.

  2. An Evaluation of the Available Energy Potential of the Gulf Coast Geopressured Zones

    SciTech Connect

    Swanson, R.K.; Osoba, J. S.; Hankin, J.W.

    1980-12-01

    The geopressured zones presently under serious study in the U.S. are tertiary sediments in the Gulf Coastal basin which are water saturated and exhibit pressures significantly greater than hydrostatic. These sediments are primarily shale, interbedded with sandstone. The top of the geopressured zone is frequently near 10,000 ft. or so, and extends to indeterminate depths. The water contained in these zones is at a moderately elevated temperature and, more significantly, appears to contain dissolved methane at near-saturation values. Conceptually, wells drilled into the geopressured zone might be expected to produce water without pumping, due to the high pressures. The dissolved methane could then be separated at the surface and used conventionally as natural gas. The water may contain sufficient heat to provide a useful source of geothermal energy, and the hydraulic energy might also provide useful work. Development of the geopressured/geothermal resource is largely dependent upon production characteristics of geopressured reservoirs. These in turn are intimately related to properties of the formations, and can be defined within reasonable limits.

  3. GT-11 - EARTH SKY - US GULF COAST

    NASA Image and Video Library

    1966-09-14

    S66-54560 (14 Sept. 1966) --- U.S. Gulf coast area from Aransas Bay, Texas, to Mobile Bay, Alabama, as seen from the Gemini-11 spacecraft during its 29th revolution of Earth. The Galveston Bay and Houston area is in center of photograph. Further eastward along the coast can be seen the Mississippi River delta and New Orleans area. Taken with a modified 70mm Hasselblad camera, using Eastman Kodak, Ektachrome, MS (S.O. 368) color film. Photo credit: NASA

  4. Regional CMS Modeling: Southwest Florida Gulf Coast

    DTIC Science & Technology

    2016-05-01

    Island , the City of Sarasota SPP at Lido Key, Sarasota County SPP at Venice Beach, and a number of federally authorized channels. Local projects exist...approximately 24.9 miles from the throat of Big Sarasota Pass and extends approximately 53.4 miles in the alongshore from Treasure Island to South Venice Inlet...regional CMS modeling framework that has been used to determine the morphologic change in multiple barrier -inlet systems along the Gulf Coast of

  5. Memorandum of Understanding with the Mississippi Gulf Coast Community College

    EPA Pesticide Factsheets

    The purpose of the Memorandum of Understanding signed October 1, 2013 is to increase cooperation between Mississippi Gulf Coast Community College and the U.S Environmental Protection Agency’s Gulf of Mexico Program in areas of mutual interest.

  6. Wetlands of the Gulf Coast

    NASA Technical Reports Server (NTRS)

    2001-01-01

    This set of images from the Multi-angle Imaging SpectroRadiometer highlights coastal areas of four states along the Gulf of Mexico: Louisiana, Mississippi, Alabama and part of the Florida panhandle. The images were acquired on October 15, 2001 (Terra orbit 9718)and represent an area of 345 kilometers x 315 kilometers.

    The two smaller images on the right are (top) a natural color view comprised of red, green, and blue band data from MISR's nadir(vertical-viewing) camera, and (bottom) a false-color view comprised of near-infrared, red, and blue band data from the same camera. The predominantly red color of the false-color image is due to the presence of vegetation, which is bright at near-infrared wavelengths. Cities appear as grey patches, with New Orleans visible at the southern edge of Lake Pontchartrain, along the left-hand side of the images. The Lake Pontchartrain Bridge runs approximately north-south across the middle of the lake. The distinctive shape of the Mississippi River Delta can be seen to the southeast of New Orleans. Other coastal cities are visible east of the Mississippi, including Biloxi, Mobile and Pensacola.

    The large image is similar to the true-color nadir view, except that red band data from the 60-degree backward-looking camera has been substituted into the red channel; the blue and green data from the nadir camera have been preserved. In this visualization, green hues appear somewhat subdued, and a number of areas with a reddish color are present, particularly near the mouths of the Mississippi, Pascagoula, Mobile-Tensaw, and Escambia Rivers. Here, the red color is highlighting differences in surface texture. This combination of angular and spectral information differentiates areas with aquatic vegetation associated with poorly drained bottom lands, marshes, and/or estuaries from the surrounding surface vegetation. These wetland regions are not as well differentiated in the conventional nadir views.

    Variations in ocean color

  7. Wetlands of the Gulf Coast

    NASA Technical Reports Server (NTRS)

    2001-01-01

    This set of images from the Multi-angle Imaging SpectroRadiometer highlights coastal areas of four states along the Gulf of Mexico: Louisiana, Mississippi, Alabama and part of the Florida panhandle. The images were acquired on October 15, 2001 (Terra orbit 9718)and represent an area of 345 kilometers x 315 kilometers.

    The two smaller images on the right are (top) a natural color view comprised of red, green, and blue band data from MISR's nadir(vertical-viewing) camera, and (bottom) a false-color view comprised of near-infrared, red, and blue band data from the same camera. The predominantly red color of the false-color image is due to the presence of vegetation, which is bright at near-infrared wavelengths. Cities appear as grey patches, with New Orleans visible at the southern edge of Lake Pontchartrain, along the left-hand side of the images. The Lake Pontchartrain Bridge runs approximately north-south across the middle of the lake. The distinctive shape of the Mississippi River Delta can be seen to the southeast of New Orleans. Other coastal cities are visible east of the Mississippi, including Biloxi, Mobile and Pensacola.

    The large image is similar to the true-color nadir view, except that red band data from the 60-degree backward-looking camera has been substituted into the red channel; the blue and green data from the nadir camera have been preserved. In this visualization, green hues appear somewhat subdued, and a number of areas with a reddish color are present, particularly near the mouths of the Mississippi, Pascagoula, Mobile-Tensaw, and Escambia Rivers. Here, the red color is highlighting differences in surface texture. This combination of angular and spectral information differentiates areas with aquatic vegetation associated with poorly drained bottom lands, marshes, and/or estuaries from the surrounding surface vegetation. These wetland regions are not as well differentiated in the conventional nadir views.

    Variations in ocean color

  8. FINAL TECHNICAL REPORT, U.S. Department of Energy: Award No. DE-EE0002855 "Demonstrating the Commercial Feasibility of Geopressured-Geothermal Power Development at Sweet Lake Field - Cameron Parish, Louisiana"

    SciTech Connect

    Gayle, Phillip A., Jr.

    2012-01-13

    The goal of the project was to demonstrate the commercial feasibility of geopressured-geothermal power development by exploiting the extraordinarily high pressured hot brines know to exist at depth near the Sweet Lake oil and gas field in Cameron Parish, Louisiana. The existence of a geopressured-geothermal system at Sweet Lake was confirmed in the 1970's and 1980's as part of DOE's Geopressured-Geothermal Program. That program showed that the energy prices at the time could not support commercial production of the resource. Increased electricity prices and technological advancements over the last two decades, combined with the current national support for developing clean, renewable energy and the job creation it would entail, provided the justification necessary to reevaluate the commercial feasibility of power generation from this vast resource.

  9. Feasibility study: Application of the geopressured-geothermal resource to pyrolytic conversion or decomposition/detoxification processes

    SciTech Connect

    Propp, W.A.; Grey, A.E.; Negus-de Wys, J.; Plum, M.M.; Haefner, D.R.

    1991-09-01

    This study presents a preliminary evaluation of the technical and economic feasibility of selected conceptual processes for pyrolytic conversion of organic feedstocks or the decomposition/detoxification of hazardous wastes by coupling the process to the geopressured-geothermal resource. The report presents a detailed discussion of the resource and of each process selected for evaluation including the technical evaluation of each. A separate section presents the economic methodology used and the evaluation of the technically viable process. A final section presents conclusions and recommendations. Three separate processes were selected for evaluation. These are pyrolytic conversion of biomass to petroleum like fluids, wet air oxidation (WAO) at subcritical conditions for destruction of hazardous waste, and supercritical water oxidation (SCWO) also for the destruction of hazardous waste. The scientific feasibility of all three processes has been previously established by various bench-scale and pilot-scale studies. For a variety of reasons detailed in the report the SCWO process is the only one deemed to be technically feasible, although the effects of the high solids content of the geothermal brine need further study. This technology shows tremendous promise for contributing to solving the nation's energy and hazardous waste problems. However, the current economic analysis suggests that it is uneconomical at this time. 50 refs., 5 figs., 7 tabs.

  10. Industry participation in DOE-sponsored geopressured geothermal research development. Final report, May 1, 1979-April 30, 1982

    SciTech Connect

    Coffer, H.F.

    1982-07-01

    Nine DOE/Industry Forum meetings where the progress of DOE's resource development program was outlined and discussed were planned, organized, conducted, and reported. These nine forum meetings included three meetings of the Drilling and Testing group, two Site Selection meetings, one meeting each of the Legal and Environmental groups and two Overview meetings where the entire DOE program was discussed. Summaries of each of these meetings are included and the progress of DOE's geopressured geothermal resource evaluation program from its early beginnings to demonstration of the tremendous size and widespread availability of this supplementary energy resource are shown. Attendees at the meetings represented a broad cross section of state and federal agencies and potential users and developers of this large energy source. Attendance at meetings averages 50 to 80 with the most interest shown at meetings where reservoir testing results were discussed. In addition to the forums 16 newsletters were prepared and distributed to all participants. These were instituted to keep industry apprised of the latest developments in this DOE resource evaluation program. Three additional studies were carried out for DOE under this contract: a reservoir continuity study, a survey of gas stripping operations, and the development of a lease agreement for design well prospects.

  11. Regional Industry Workforce Development: The Gulf Coast Petrochemical Information Network

    ERIC Educational Resources Information Center

    Hodgin, Johnette; Muha, Susan

    2008-01-01

    The Gulf Coast Petrochemical Information Network (GC-PIN) is a workforce development partnership among industry businesses and area institutions of higher education in the four-county Gulf Coast region. GC-PIN partners develop new industry-specific curricula, foster industry career awareness, and retrain existing employees in new technologies.

  12. Screening Gulf Coast forest species for susceptibility to Phytophthora ramorum

    Treesearch

    Jason Preuett; Daniel Collins; Douglas Luster; Timothy Widmer

    2013-01-01

    Phytophthora ramorum, the causal agent of sudden oak death in California oak woodlands, poses a threat to woody plants in the rest of the United States, including the Gulf Coast area, which is regarded as a high-risk location. Several plant species native to Gulf Coast forests were tested for susceptibility to P. ramorum,...

  13. Regional Industry Workforce Development: The Gulf Coast Petrochemical Information Network

    ERIC Educational Resources Information Center

    Hodgin, Johnette; Muha, Susan

    2008-01-01

    The Gulf Coast Petrochemical Information Network (GC-PIN) is a workforce development partnership among industry businesses and area institutions of higher education in the four-county Gulf Coast region. GC-PIN partners develop new industry-specific curricula, foster industry career awareness, and retrain existing employees in new technologies.

  14. Provenance of Norphlet sandstone, northern Gulf Coast

    SciTech Connect

    Ryan, W.P.; Ward, W.C.; Kuglar, R.L.

    1987-09-01

    The Upper Jurassic Norphlet sandstone of the northern Gulf Coast is predominantly subarkose, with some arkose in the eastern area and sublitharenite and quartzarenite in the western area. Despite great depths of burial and despite feldspar and rock-fragment constituents, diagenesis has not appreciably altered the composition of Norphlet sandstone. Therefore, reconstruction of original composition of Norphlet sandstone presented little difficulty. Variation in detrital modes of the Norphlet suggests compositionally distinct source terranes. Samples from Florida, Alabama, and Mississippi reflect the influence of metamorphic and plutonic rocks of the Appalachian Piedmont Province and of Triassic-Jurassic volcanic rocks. Sandstones in east Texas, northern Louisiana, and southern Arkansas were derived from sedimentary and metasedimentary rocks of the Ouachita system. The Arbuckle Mountains and Llano uplift may have supplied trace amounts of quartzo-feldspathic and volcanic-rock fragments to the extreme western part of the study area. Norphlet sandstones represent a mixture of collision-orogen-derived sediment from the Appalachian and/or Ouachita system and continental-block-derived sediment from paleohighs and uplifts within the Gulf basin. However, Norphlet sandstones plot in the craton-interior and transitional-continental fields on Q-F-L and QM-F-Lt tectonic-provenance diagrams, because of mineralogically mature source rocks, elimination of unstable grains by abrasion and sorting during deposition, and/or sediment mixing from different source terranes.

  15. Investigation and evaluation of geopressured-geothermal wells. Final report: Beulah Simon No. 2 Well, Vermilion Parish, Louisiana. Volume I. Completion and testing

    SciTech Connect

    Dobson, R.J.; Hartsock, J.H.; McCoy, R.L.; Rodgers, J.A.

    1980-07-01

    Geopressured-geothermal (Geo{sup 2}) test operations were conducted at the Beulah Simon No. 2 well site during the period from September through December 1979. The well provided the second geopressured-geothermal test to be completed under the DOE-Gruy Well of Opportunity program. The completion in a geopressured aquifer of Oligocene age at approximately 14,700 feet and the testing of hot salt water from this zone were accomplished without significant difficulty. Some problems were encountered with the wireline and wireline high-pressure lubricator associated with the running of bottomhole instruments. The objectives of the project were all accomplished, and good test data were obtained on the flow rates of gas and water. The gas content was 24 standard cubic feet per stock tank barrel of water. The disposal well accepted the full wellhead stream at temperatures as high as 255{sup 0}F (124{sup 0}C). Over the 10-day flow period the hot brine did not appear to adversely affect the clay minerals in the disposal aquifer. A conclusion from this operation is that presently available wirelines and pressure lubricators are not adaptable for use with uninhibited well fluids under flowing conditions. In addition, this test demonstrated that injection of scale inhibitor down the annulus eliminated scale buildup within the flow string and surface facilities. (MHR)

  16. Gulf Coast Sea Turtle Hatchlings Released at KSC

    NASA Image and Video Library

    The first group of hatchlings from endangered sea turtle eggs brought from beaches along the northern U.S. Gulf Coast was released into the Atlantic Ocean off NASA's Kennedy Space Center in Florida...

  17. Technical support for geopressured-geothermal well activities in Louisiana: Annual report for the period 1 November 1984 to 31 December 1986

    SciTech Connect

    Groat, C.G.

    1987-09-01

    This report describes environmental monitoring activities carried out by Louisiana State University (LSU) under US Department of Energy Contract FC07-85NV10425 for the period 1 November 1984 through 31 December 1986. Other aspects of the LSU technical support program completed under prior contracts were covered in final form in reports preceding this one. During the contract period, the Louisiana Geological Survey, aided by subcontractors, monitored microseismic activity, land-surface subsidence, and surface and ground-water quality at three designed geopressured-geothermal test well sites in Louisiana and Texas. Don Stevenson supervised microseismic monitoring activities, and Drukell Trahan coordinated water quality and land-surface subsidence studies. This is a progress report in the sense that it discusses program components, provides raw data, and presents preliminary interpretations. The environmental monitoring program continues and will be the subject of subsequent annual reports.

  18. Environmental baseline monitoring in the area of general crude oil - Department of Energy Pleasant Bayou Number 2: a geopressured geothermal test well, 1979. Annual report, Volume I

    SciTech Connect

    Gustavson, T.C.; Howard, R.C.; McGookey, D.

    1980-01-01

    A program to monitor baseline air and water quality, subsidence, microseismic activity, and noise in the vicinity of Brazoria County geopressured geothermal test wells, Pleasant Bayou No. 1 and No. 2, has been underway since March 1978. The initial report on environmental baseline monitoring at the test well contained descriptions of baseline air and water quality, a noise survey, an inventory of microseismic activity, and a discussion of the installation of a liquid tilt meter (Gustavson, 1979). The following report continues the description of baseline air and water quality of the test well site, includes an inventory of microseismic activity during 1979 with interpretations of the origin of the events, and discusses the installation and monitoring of a liquid tilt meter at the test well site. In addition, a brief description of flooding at the test site is presented.

  19. Testing geopressured geothermal reservoirs in existing wells. Saldana well No. 2, Zapata County, Texas. Volume I. Completion and testing. Final report

    SciTech Connect

    Not Available

    1981-10-07

    The Saldana Well No. 2, approximately 35 miles Southeast of the city of Laredo, Texas, was the sixth successful test of a geopressured-geothermal aquifer under the DOE Wells of Opportunity Program. The well was tested through the annulus between 7-inch casing and 2-3/8 inch tubing. The interval tested was from 9745 to 9820 feet. The geological section was the 1st Hinnant Sand, an upper member of the Wilcox Group. Produced water was injected into the Saldana Well No. 1, which was also acquired from Riddle Oil Company and converted to a disposal well. A Miocene salt water sand was perforated from 3005 to 3100 feet for disposal. One pressure drawdown flow test and one pressure buildup test were conducted during a 10-day period. A total of 9328 barrels of water was produced. The highest sustained flow rate was 1950 BWPD.

  20. 77 FR 42653 - United States Navy Restricted Area, SUPSHIP Gulf Coast Detachment Mobile at AUSTAL, USA, Mobile...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-20

    ... Department of the Army, Corps of Engineers 33 CFR Part 334 United States Navy Restricted Area, SUPSHIP Gulf... and Repair, United States Navy (USN), Gulf Coast (SUPSHIP Gulf Coast) assumed the duties of... (SUPERVISOR), USN, Gulf Coast (SUPSHIP Gulf Coast) assumed the duties of administering new...

  1. Gulf Coast, Shaded Relief and Colored Height

    NASA Technical Reports Server (NTRS)

    2004-01-01

    [figure removed for brevity, see original site] [figure removed for brevity, see original site] Figure 1Figure 2

    The topography of the Gulf Coast states is well shown in this color-coded shaded relief map generated with data from the Shuttle Radar Topography Mission. The image on the top (see Figure 1) is a standard view showing southern Louisiana, Mississippi, Alabama and the panhandle of Florida. Green colors indicate low elevations, rising through yellow and tan, to white at the highest elevations.

    For the view on the bottom (see Figure 2), elevations below 10 meters (33 feet) above sea level have been colored light blue. These low coastal elevations are especially vulnerable to flooding associated with storm surges. Planners can use data like these to predict which areas are in the most danger and help develop mitigation plans in the event of particular flood events.

    Elevation data used in this image were acquired by the Shuttle Radar Topography Mission aboard the Space Shuttle Endeavour, launched on Feb. 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM was designed to collect 3-D measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter (approximately 200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between NASA, the National Geospatial-Intelligence Agency (NGA) of the U.S. Department of Defense and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., for NASA's Science Mission Directorate, Washington, D.C.

    Location: 31 degrees north latitude, 88 degrees west longitude Orientation: North toward the top, Mercator projection Size: 702 by 433 kilometers (435 by 268 miles) Image Data: shaded and colored SRTM

  2. Gulf Coast, Shaded Relief and Colored Height

    NASA Technical Reports Server (NTRS)

    2004-01-01

    [figure removed for brevity, see original site] [figure removed for brevity, see original site] Figure 1Figure 2

    The topography of the Gulf Coast states is well shown in this color-coded shaded relief map generated with data from the Shuttle Radar Topography Mission. The image on the top (see Figure 1) is a standard view showing southern Louisiana, Mississippi, Alabama and the panhandle of Florida. Green colors indicate low elevations, rising through yellow and tan, to white at the highest elevations.

    For the view on the bottom (see Figure 2), elevations below 10 meters (33 feet) above sea level have been colored light blue. These low coastal elevations are especially vulnerable to flooding associated with storm surges. Planners can use data like these to predict which areas are in the most danger and help develop mitigation plans in the event of particular flood events.

    Elevation data used in this image were acquired by the Shuttle Radar Topography Mission aboard the Space Shuttle Endeavour, launched on Feb. 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM was designed to collect 3-D measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter (approximately 200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between NASA, the National Geospatial-Intelligence Agency (NGA) of the U.S. Department of Defense and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., for NASA's Science Mission Directorate, Washington, D.C.

    Location: 31 degrees north latitude, 88 degrees west longitude Orientation: North toward the top, Mercator projection Size: 702 by 433 kilometers (435 by 268 miles) Image Data: shaded and colored SRTM

  3. 75 FR 62313 - Establishing the Gulf Coast Ecosystem Restoration Task Force

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-08

    ... Order 13554 of October 5, 2010 Establishing the Gulf Coast Ecosystem Restoration Task Force By the... vibrant ecosystem; and the Gulf's culture, natural beauty, and historic significance are unique. Each year... Gulf Coast residents conserve and restore resilient and healthy ecosystems in the Gulf of Mexico and...

  4. Hurricane Isaac Moving Towards Northern Gulf Coast

    NASA Image and Video Library

    This is an animation of GOES-13 satellite imagery from Aug. 26-28, 2012 of Hurricane Isaac's track through the Gulf of Mexico. Isaac is headed for New Orleans, exactly 7 years after hurricane Katri...

  5. 75 FR 38913 - Long-Term Gulf Coast Restoration Support Plan

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-06

    ... June 30, 2010 Long-Term Gulf Coast Restoration Support Plan Memorandum for the Heads of Executive... crisis does not happen again, we must help the Gulf Coast and its people recover from this tragedy. A... environmental restoration of the Gulf Coast region, in coordination with States, local communities, tribes...

  6. Gulf Coast Ecosystem Restoration Council Releases Draft Initial Funded Priorities List A series of public meetings will be held across the Gulf Coast

    EPA Pesticide Factsheets

    ATLANTA - The Gulf Coast Ecosystem Restoration Council (Council) released a draft Initial Funded Priorities List (draft FPL). The Council is comprised of governors from the five affected Gulf States, the Secretaries from the U.S. Departments of the

  7. SOLUTION MINING IN SALT DOMES OF THE GULF COAST EMBAYMENT

    SciTech Connect

    Griswold, G. B.

    1981-02-01

    Following a description of salt resources in the salt domes of the gulf coast embayment, mining, particularly solution mining, is described. A scenario is constructed which could lead to release of radioactive waste stored in a salt dome via inadvertent solution mining and the consequences of this scenario are analyzed.

  8. Zika Virus Vector Competency of Mosquitoes, Gulf Coast, United States.

    PubMed

    Hart, Charles E; Roundy, Christopher M; Azar, Sasha R; Huang, Jing H; Yun, Ruimei; Reynolds, Erin; Leal, Grace; Nava, Martin R; Vela, Jeremy; Stark, Pamela M; Debboun, Mustapha; Rossi, Shannan; Vasilakis, Nikos; Thangamani, Saravanan; Weaver, Scott C

    2017-03-01

    Zika virus has recently spread throughout the Americas. Although Aedes aegypti mosquitoes are considered the primary vector, Culex quinquefasciatus and mosquitoes of other species may also be vectors. We tested Cx. quinquefasciatus and Ae. taeniorhynchus mosquitoes from the US Gulf Coast; both were refractory to infection and incapable of transmission.

  9. Zika Virus Vector Competency of Mosquitoes, Gulf Coast, United States

    PubMed Central

    Hart, Charles E.; Roundy, Christopher M.; Azar, Sasha R.; Huang, Jing H.; Yun, Ruimei; Reynolds, Erin; Leal, Grace; Nava, Martin R.; Vela, Jeremy; Stark, Pamela M.; Debboun, Mustapha; Rossi, Shannan; Vasilakis, Nikos

    2017-01-01

    Zika virus has recently spread throughout the Americas. Although Aedes aegypti mosquitoes are considered the primary vector, Culex quinquefasciatus and mosquitoes of other species may also be vectors. We tested Cx. quinquefasciatus and Ae. taeniorhynchus mosquitoes from the US Gulf Coast; both were refractory to infection and incapable of transmission. PMID:28005002

  10. Crisis Begets Change: Hurricane Recovery at Gulf Coast Institutions

    ERIC Educational Resources Information Center

    Shaw, Mahauganee Dawn

    2012-01-01

    Despite a growing body of literature on campus crisis management and the breadth of research on organizational change, little is known about organizational changes prompted by campus crisis. The purpose of this study is to examine the changes made to the operational profiles of Gulf Coast institutions during the process of recovering from major…

  11. Crisis Begets Change: Hurricane Recovery at Gulf Coast Institutions

    ERIC Educational Resources Information Center

    Shaw, Mahauganee Dawn

    2012-01-01

    Despite a growing body of literature on campus crisis management and the breadth of research on organizational change, little is known about organizational changes prompted by campus crisis. The purpose of this study is to examine the changes made to the operational profiles of Gulf Coast institutions during the process of recovering from major…

  12. 78 FR 54801 - Gulf Coast Restoration Trust Fund

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-06

    ... 31 U.S.C. 9702, Treasury will invest the Gulf Coast Restoration Trust Fund in non-marketable Treasury... weighted average of population of the parish, and the weighted average of the land mass of the parish. We... region is an area in which the people, animals, minerals, land, and water are interconnected....

  13. Florida Gulf Coast University Annual Accountability Report, 2013-14

    ERIC Educational Resources Information Center

    Board of Governors, State University System of Florida, 2014

    2014-01-01

    This statistical report provides data tables on Florida Gulf Coast University's (FGCU's) financial resources, personnel, enrollment, undergraduate education, graduate education, and research & economic development. Highlighted data include: (1) Recent results (fall 2013) of FGCU's participation in the National Survey of Student Engagement…

  14. Gulf of Mexico and Atlantic coast sea level change

    NASA Astrophysics Data System (ADS)

    Douglas, Bruce C.

    Twentieth-century relative sea level rise shows considerable variability along the U.S. East and Gulf coasts. Local rates of rise lie in the range of about 1.5 to more than 4 mm per year for records from Key West, Florida, to New York City. Rates of sea level rise in the Gulf of Mexico can be much higher. In Texas and Louisiana, long-term water levels are rising up to about 10 mm per year. This is having disastrous consequences in the form of wetlands loss in the region, estimated to be as much as 65 km2 per year in the Mississippi Delta area of Louisiana alone. Beach erosion is also significant along both the Gulf and Atlantic coasts, resulting in ever-increasing exposure of fixed structures to the damaging impacts of storms. The especially high rates of sea level rise in Louisiana and Texas are a result of their particular geomorphology, and anthropogenic alterations in the form of sediment diversion and withdrawal of underground fluids. The average long-term local rate of sea level rise on the rest of the U.S. East and Gulf coasts when corrected for glacial isostatic adjustment is about 2 mm per year, in conformity with 20th century global sea level rise. U.S. East and Gulf coast tide gauge records also have regionally coherent low frequency (decadal and longer) variations that need to be understood because of their impact on wetlands loss, and to enable accurate determination of long-term trends of sea level rise.

  15. Habitat Suitability Index Models: Northern pintail (gulf coast wintering)

    USGS Publications Warehouse

    Howard, Rebecca J.; Kantrud, Harold A.

    1986-01-01

    A review and synthesis of existing information were used to develop a model for evaluating wintering habitat quality for northern pintail (Anas acuta) along the Gulf of Mexico coast. The model is scaled to produce an index between unsuitable habitat) and 1.0 (optimal habitat). Habitat suitability index models are designed for use with the Habitat Evaluation Procedures previously developed by the U.S. Fish and Wildlife Service. Guidelines for model application and techniques for measuring model variables are provided.

  16. High-resolution, three-dimensional, seismic survey over the geopressured-geothermal reservoir at Parcperdue, Louisiana. Final report, January 1, 1981-July 31, 1985

    SciTech Connect

    Kinsland, G.L.

    1985-07-01

    A high resolution three-dimensional seismic survey was performed over the reservoir of the geopressured-geothermal production experiment at Parcperdue, Louisiana and high quality results have been obtained. The reservoir is now mapped with more control and assurance than was possible with the previously existing data. Three differences between the map of this project and those available before are significant in the interpretation of the depletion experiment: (1) the western bounding fault is further west leading to a larger reservoir volume; (2) a down to the north (relief) fault through the reservoir has been found; and (3) there are structural highs in which small petroleum accumulations may exist within the reservoir. An original goal of testing the before and after seismic experiment idea as a production monitor has not been realized. However, the quality of the data at the stages of processing presently available is high enough that, had the well not failed, it would have been prudent to have proceeded with the project toward the second experiment. 3 refs., 16 figs., 3 tabs.

  17. Testing geopressured geothermal reservoirs in existing wells. Final report P. R. Girouard Well No. 1, Lafayette Parish, Louisiana. Volume I. Completion and testing

    SciTech Connect

    Not Available

    1981-01-01

    The P.R. Girouard No. 1 Well, located approximately 10 miles southeast of Lafayette, Louisiana, was the fourth successful test of a geopressured-geothermal aquifer under the Wells of Opportunity program. The well was tested through 3-1/2 inch tubing set on a packer at 14,570 feet without major problems. The geological section tested was the Oligocene Marginulina Texana No. 1 sand of upper Frio age. The interval tested was from 14,744 to 14,819 feet. Produced water was piped down a disposal well perforated from 2870 to 3000 feet in a Miocene saltwater sand. Four flow tests were conducted for sustained production rates of approximately 4000 BWPD to approximately 15,000 BWPD. The highest achieved, during a fifth short test, was 18,460 BWPD. The test equipment was capable of handling higher rates. The gas-to-water ratio was relatively uniform at approximately 40 SCF/bbl. The heating value of the gas is 970 Btu/SCF. The reservoir tests show that is is doubtful that this well would sustain production rates over 10,000 BWPD for any lengthy period from the sand zone in which it was completed. This limited flow capacity is due to the well's poor location in the reservoir and is not a result of any production deficiencies of the Marginulina Texana sand.

  18. Post-disaster Gulf Coast Recovery Using Telehealth

    PubMed Central

    Kim, Thomas J.; Eastburn, Sasha L.; Icenogle, Marjorie L.; Slagle, Michelle; Nuriddin, Azizeh H.; Brantley, Katrina M.; Foreman, Rachel D.; Buckner, Ayanna V.

    2013-01-01

    Abstract Objective: The Gulf Coast continues to struggle with service need far outpacing available resources. Since 2005, the Regional Coordinating Center for Hurricane Response (RCC) at Morehouse School of Medicine, Atlanta, GA, has supported telehealth solutions designed to meet high service needs (e.g., psychiatry) within primary care and other healthcare organizations. The overall RCC vision is to support autonomous, useful, and sustainable telehealth programs towards mitigating unmet disaster-related needs. Subjects and Methods: To assess Gulf Coast telehealth experiences, we conducted semistructured interviews with both regional key informants and national organizations with Gulf Coast recovery interests. Using qualitative-descriptive analysis, interview transcripts were analyzed to identify shared development themes. Results: Thirty-eight key informants were interviewed, representing a 77.6% participation rate among organizations engaged by the RCC. Seven elements critical to telehealth success were identified: Funding, Regulatory, Workflow, Attitudes, Personnel, Technology, and Evaluation. These key informant accounts reveal shared insights with telehealth regarding successes, challenges, and recommendations. Conclusions: The seven elements critical to telehealth success both confirm and organize development principles from a diverse collective of healthcare stakeholders. The structured nature of these insights suggests a generalizable framework upon which other organizations might develop telehealth strategies toward addressing high service needs with limited resources. PMID:23427981

  19. Hurricane Impact on Gulf Coast Barriers.

    DTIC Science & Technology

    1982-01-01

    of latlll I Ihe central pressore had dropped to 946 mb. onshore winds in excess of 200 km/hr were lashing the Alabama I-~to infd thie open coast toerin...relationship between the hurricane tide height lowing criteria. Large lateral extent of’ horizontal. upper flow , and the barrier profile. regime, planar...stratification Each set is some 10 to 20 cr0 These fans are characterized byv wide con tinhi-its upper- flow thick. Tahular cross-stratif aioofviblthcnsisa

  20. 3 CFR 13626 - Executive Order 13626 of September 10, 2012. Gulf Coast Ecosystem Restoration

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Coast Ecosystem Restoration 13626 Order 13626 Presidential Documents Executive Orders Executive Order 13626 of September 10, 2012 EO 13626 Gulf Coast Ecosystem Restoration By the authority vested in me as... a Gulf Coast Ecosystem Restoration Task Force (Task Force) to coordinate intergovernmental efforts...

  1. Mysterious Black Water off Florida's Gulf Coast

    NASA Technical Reports Server (NTRS)

    2002-01-01

    In mid-December last year, a mysterious black water overtook the normally bluish green waters of Florida Bay. Over the course of the winter, the extent of the water grew to encompass an area as big as Lake Okeechobee, Florida, before subsiding over the last few weeks. These images taken by the Sea-viewing Wide Field-of-View Sensor (SeaWiFS), flying aboard the Orbview-2 satellite, show the progression of the black water over the last three months. The affected water sits along the southeastern coast of Florida about fifty miles north of the Florida Keys. As of now, scientists do not know why the water appears black in satellite and aerial images or whether the water is harming the wildlife. They speculate that it could be due to an exotic algae bloom, an underwater fountain pushing up sediments from the ocean floor, or possibly chemical and sediment run-off from the nearby Shark River. Researchers at the Florida Marine Research Institute in St. Petersburg and the Mote Marine Research Institute in Sarasota are running tests to determine the chemical make-up of the water. No big fish kills have been reported in the area. But fishermen say the catch has been low this winter. In addition, the black water sits just north of the Florida Keys National Marine Sanctuary, which is home to one of the largest coral reef habitats in the United States. Toxic run-off from the Florida coastline and motor boats in the area have already destroyed many of Florida's reefs. Scientists are concerned that if the extent of the black water grows again, it could endanger these reefs. Information provided by the Naples Daily News. For up-to-date images of the area, view these SeaWiFS Images of Florida Bay. Image courtesy the SeaWiFS Project, NASA/Goddard Space Flight Center, and ORBIMAGE

  2. Giant Upper Cretaceous oysters from the Gulf coast and Caribbean

    USGS Publications Warehouse

    Sohl, Norman F.; Kauffman, Erle G.

    1964-01-01

    Two unusually massive ostreid species, representing the largest and youngest Mesozoic members of their respective lineages, occur in Upper Cretaceous sediment of the gulf coast and Caribbean areas. Their characteristics and significance, as well as the morphologic terminology of ostreids in general, are discussed. Crassostrea cusseta Sohl and Kauffman n. sp. is the largest known ostreid from Mesozoic rocks of North America; it occurs sporadically in the Cusseta Sand and rarely in the Blufftown Formation of the Chattahoochee River region in Georgia and Alabama. It is especially notable in that it lacks a detectable posterior adductor muscle scar on large adult shells. C. cusseta is the terminal Cretaceous member of the C. soleniscus lineage in gulf coast sediments; the lineage continues, however, with little basic modification, throughout the Cenozoic, being represented in the Eocene by C. gigantissima (Finch) and probably, in modern times, by C. virginica (Gmelin). The C. soleniscus lineage is the first typically modern crassostreid group recognized in the Mesozoic. Arctostrea aguilerae (Böse) occurs in Late Campanian and Early Maestrichtian sediments of Alabama, Mississippi, Texas(?), Mexico, and Cuba. The mature shell of this species is larger and more massive than that of any other known arctostreid. Arctostrea is well represented throughout the Upper Jurassic and Cretaceous of Europe, but in North America, despite the great numbers and diversity of Cretaceous oysters, only A. aguilerae and the Albian form A. carinata are known. The presence of A. aquilerae in both the Caribbean and gulf coast faunas is exceptional, as the Late Cretaceous faunas of these provinces are generally distinct and originated in different faunal realms.

  3. Hunting for Exoplanets at Florida Gulf Coast University

    NASA Astrophysics Data System (ADS)

    Buzasi, Derek L.; Lezcano, Andy; Fine, Stephanie; Humes, Cassandra; King, Alex; Patel, Keval; Rivers, Dakota; Sinclair, Kelsey; Stacey, Enzo; Vural, Leyla; Zimmer, Jenna

    2016-06-01

    Honors Program participants at Florida Gulf Coast University must complete two of four required "Honors Experiences". One student option is a research experience, and we have developed a "Planet Hunters" course to provide an astronomical research track. In the course, students spend the first semester learning astronomical background and exoplanet detection techniques, while the second semester is devoted to planet searches in Kepler and K2 data, using student-oriented software tools developed specifically for the task. In this poster, we present the tools, data sets, and results obtained by students participating in the first year of the course, along with lessons learned for future implementation.

  4. Gulf Coast stratigraphic traps in the Lower Cretaceous carbonates

    SciTech Connect

    Sams, R.H.

    1981-09-01

    Prolific oil and gas production is being obtained from carbonate patch reef reservoirs within Lower Cretaceous formations along the Gulf Coast from Florida to Mexico. Many of these reservoirs are trapped stratigraphically where facies changes within a formation or patch reef unit establish an up-dip permeability barrier. Illustrations of such traps are given from the literature for oil and gas fields in Florida, Mississippi, Louisiana, and E. Texas. A geologic model is presented which provides the explorationist with an actual drilling target suitable to a multiple well exploratory program. 18 references.

  5. Geopressured-Geothermal Drilling and Testing Plan, Volume II, Testing Plan; Dow Chemical Co. - Dept. of Energy Dow-DOE Sweezy No. 1 Well, Vermilion Parish, Louisiana

    SciTech Connect

    1982-02-01

    The Dow/D.O.E. L. R. Sweezy No. 1 geopressured geothermal production well was completed in August of 1981. The well was perforated and gravel packed in approximately 50 feet of sand from 13,344 feet to 13,395 feet. Permeabilities of 6 to 914 millidarcies were measured with porosity of 25 to 36%. Static surface pressure after well clean-up was 5000 psi. At 1000 B/D flow rate the drawdown was 50 psi. The water produced in clean-up contained 100,000 ppm TDS. This report details the plan for testing this well with the goal of obtaining sufficient data to define the total production curve of the small, 939 acre, reservoir. A production time of six to nine months is anticipated. The salt water disposal well is expected to be completed and surface equipment installed such that production testing will begin by April 1, 1982. The program should be finished and reports written by February 28, 1983. The brine will be produced from the No.1 well, passed through a separator where the gas is removed, then reinjected into the No.2 (SWD) well under separator pressure. Flow rates of up to 25,000 B/D are expected. The tests are divided into a two-week short-term test and six to nine-month long-term tests with periodic downhole measurement of drawdown and buildup rates. Data obtained in the testing will be relayed by phoneline computer hookup to Otis Engineering in Dallas, Texas, where the reservoir calculations and modeling will be done. At the point where sufficient data has been obtained to reach the objectives of the program, production will be ended, the wells plugged and abandoned, and a final report will be issued.

  6. T-F and S/DOE Gladys McCall No. 1 well, Cameron Parish, Louisiana. Geopressured-geothermal well report, Volume II. Well workover and production testing, February 1982-October 1985. Final report. Part 1

    SciTech Connect

    Not Available

    1985-01-01

    The T-F and S/DOE Gladys McCall No. 1 well was the fourth in a series of wells in the DOE Design Wells Program that were drilled into deep, large geopressured-geothermal brine aquifers in order to provide basic data with which to determine the technological and economic viability of producing energy from these unconventional resources. This brine production well was spudded on May 27, 1981 and drilling operations were completed on November 2, 1981 after using 160 days of rig time. The well was drilled to a total depth of 16,510 feet. The target sands lie at a depth of 14,412 to 15,860 feet in the Fleming Formation of the lower Miocene. This report covers well production testing operations and necessary well workover operations during the February 1982 to October 1985 period. The primary goals of the well testing program were: (1) to determine reservoir size, shape, volume, drive mechanisms, and other reservoir parameters, (2) to determine and demonstrate the technological and economic viability of producing energy from a geopressured-geothermal brine aquifer through long-term production testing, and (3) to determine problem areas associated with such long-term production, and to develop solutions therefor.

  7. Geopressured -- Geothermal Drilling and Testing Plan: Volume 1 Drilling and Completion, Technadril/Fenix and Scisson -- Department of Energy T/F&S -- DOE Gladys McCall No. 1 Well, Cameron Parish, Louisiana

    SciTech Connect

    1981-03-01

    The principal objectives of the geopressured-geothermal reservoir resource assessment program are to obtain data related to the following: 1.2.1--Reservoir parameters and characteristics, including permeability, porosity, areal extent, net thickness of productive sands, methane content, and formation compressibilities; 1.2.2--Ability of a geopressured well to flow at the high rates, i.e., 40,000 bbls/day, expected to achieve the resource recovery required for economic commercial operations; 1.2.3--Reservoir production drive mechanisms and physical and chemical changes that may occur with various production rates and conditions; 1.2.4--Aquifer fluid properties, including chemical composition, dissolved and suspended solids, hydrocarbon content, in situ temperature, and pressure; 1.2.5--Techniques and strategies for completion and production of geopressured wells for methane, thermal, and hydraulic energy production, including examination of producibility using computer simulators employing parameters determined by well testing; 1.2.6--Disposal well parameters, such as optimum injection rate and pressures (transient and pseudo steady state), chemical compatibility of fluids, temperature-solubility relationships, and the economic considerations of injection, including evaluation of filtering and inhibition techniques in the process steam; and 1.2.7--The long-term environmental effects of an extensive commercial application of geopressured-geothermal energy, i.e., subsidence, induced seismicity, and fluid disposal.

  8. 78 FR 50030 - Implementation of New Gulf Coast Ecosystem Restoration Science, Observation, Monitoring, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-16

    ... National Oceanic and Atmospheric Administration Implementation of New Gulf Coast Ecosystem Restoration Science, Observation, Monitoring, and Technology Program AGENCY: National Ocean Service (NOS), National... Gulf Coast States Act (RESTORE Act) of 2012, of a new competitive science program to ensure the long...

  9. Design and Rationale of Gulf locals with Acute Coronary Syndrome Events (Gulf Coast) Registry

    PubMed Central

    Zubaid, Mohammad; Thani, Khalid Bin; Rashed, Wafa; Alsheikh-Ali, Alawi; Alrawahi, Najib; Ridha, Mustafa; Akbar, Mousa; Alenezi, Fahad; Alhamdan, Rashed; Almahmeed, Wael; Ouda, Hussam; Al-Mulla, Arif; Baslaib, Fahad; Shehab, Abdulla; Alnuaimi, Abdulla; Amin, Haitham; Krumholz, Harlan M

    2014-01-01

    Objectives: To describe the risk profile, management and one-year outcomes of patients hospitalized with acute coronary syndrome (ACS) in the Gulf region of the Middle East. Subjects and Methods: The Gulf locals with acute coronary syndrome events (Gulf COAST) registry is a prospective, multinational, longitudinal, observational, cohort-based registry of consecutive citizens, from the Gulf region of the Middle East, admitted from January 2012 to January 2013 to 29 hospitals with a diagnosis of ACS. Data entered online included patient demographics, cardiovascular risk profiles, past medical history, physical findings on admission, in-hospital diagnostic tests and therapeutic management, as well as one year outcomes. Results: 3188 patients were recruited. The mean age was 60.4 ± 12.6years (range: 22-112), 2104 (66%) were males and 1084 (34%) females. The discharge diagnosis was ST-segment elevation myocardial infarction (STEMI) in 741 (23.2%), new-onset left bundle branch block myocardial infarction (LBBBMI) in 30 (0.9%), non-ST-segment elevation myocardial infarction (NSTEMI) in 1486 (46.6%) and unstable angina in 931 (29.2%). At hospital presentation, 2105 (66%), 1779 (55.8%), 1703 (53.4%) and 740 (23.2%) had history of hypertension, dyslipidemia, diabetes mellitus and active smoking, respectively. Conclusion: Patients with ACS in our region are young with very high risk profile. The Gulf COAST registry is an example of successful regional collaboration and will provide information on contemporary management of ACS in the region. PMID:25328551

  10. 40 CFR 408.260 - Applicability; description of the Atlantic and Gulf Coast hand-shucked oyster processing...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Atlantic and Gulf Coast hand-shucked oyster processing subcategory. 408.260 Section 408.260 Protection of... SEAFOOD PROCESSING POINT SOURCE CATEGORY Atlantic and Gulf Coast Hand-Shucked Oyster Processing Subcategory § 408.260 Applicability; description of the Atlantic and Gulf Coast hand-shucked oyster processing...

  11. 40 CFR 408.260 - Applicability; description of the Atlantic and Gulf Coast hand-shucked oyster processing...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Atlantic and Gulf Coast hand-shucked oyster processing subcategory. 408.260 Section 408.260 Protection of... SEAFOOD PROCESSING POINT SOURCE CATEGORY Atlantic and Gulf Coast Hand-Shucked Oyster Processing Subcategory § 408.260 Applicability; description of the Atlantic and Gulf Coast hand-shucked oyster processing...

  12. 40 CFR 408.260 - Applicability; description of the Atlantic and Gulf Coast hand-shucked oyster processing...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Atlantic and Gulf Coast hand-shucked oyster processing subcategory. 408.260 Section 408.260 Protection of... SEAFOOD PROCESSING POINT SOURCE CATEGORY Atlantic and Gulf Coast Hand-Shucked Oyster Processing Subcategory § 408.260 Applicability; description of the Atlantic and Gulf Coast hand-shucked oyster processing...

  13. 40 CFR 408.260 - Applicability; description of the Atlantic and Gulf Coast hand-shucked oyster processing...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Atlantic and Gulf Coast hand-shucked oyster processing subcategory. 408.260 Section 408.260 Protection of... SEAFOOD PROCESSING POINT SOURCE CATEGORY Atlantic and Gulf Coast Hand-Shucked Oyster Processing Subcategory § 408.260 Applicability; description of the Atlantic and Gulf Coast hand-shucked oyster processing...

  14. 40 CFR 408.260 - Applicability; description of the Atlantic and Gulf Coast hand-shucked oyster processing...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Atlantic and Gulf Coast hand-shucked oyster processing subcategory. 408.260 Section 408.260 Protection of... SEAFOOD PROCESSING POINT SOURCE CATEGORY Atlantic and Gulf Coast Hand-Shucked Oyster Processing Subcategory § 408.260 Applicability; description of the Atlantic and Gulf Coast hand-shucked oyster processing...

  15. A coastal hazards data base for the US Gulf Coast

    SciTech Connect

    Daniels, R.C. |; Gornitz, V.M.; White, T.W.

    1994-06-01

    This document describes the contents of a digital data base that may be used to identify coastlines along the US Gulf Coast at risk to sea-level rise. The data base integrates point, line, and polygon data for the US Gulf Coast into 0.25{degree} latitude by 0.25{degree} longitude grid cells and into 1:2,000,000 digitized line segments that can be used by raster or vector geographic information systems (GIS) as well as by non-GIS data base systems. Each coastal grid cell and line segment contains data on elevation, geology, geomorphology, sea-level trends, shoreline displacement (erosion/accretion), tidal ranges, and wave heights. To allow for the identification of coastlines at risk from sea-level rise, 7 of the 22 original data variables in this data base were classified by vulnerability and used to create 7 relative risk variables. These relative risk variables range in value from 1 to 5 and may be used to calculate a coastal vulnerability index for each grid cell and/or line segment. The data for these 29 variables (i.e., the 22 original variables and 7 risk variables) have been placed into the following data formats: (1) Gridded polygon data for the 22 original data variables. Data include elevation, geology, geomorphology, sea-level trends, shoreline displacement (erosion/accretion), tidal ranges, and wave heights. (2) Gridded polygon data for the seven classified risk variables. The risk variables are classified versions of: mean coastal elevation, geology, geomorphology, local subsidence trend, mean shoreline displacement, maximum tidal range, and maximum significant wave height. (3) 1:2,000,000 line segment data containing the 29 data variables (the 22 original data variables and the seven classified risk variables). (4) Supplemental point data for the stations used in calculating the sea-level trend and tidal range data sets. (5) Supplemental line segment data containing a 1:2,000,000 digitized coastline of the US Gulf Coast as defined by this document.

  16. Climate change and its potential impacts on the Gulf Coast region of the United States.

    PubMed

    Tchounwou, P B

    1999-01-01

    The Gulf Coast region of the United States abuts five states, including Alabama, Florida, Louisiana, Mississippi, and Texas. In general, the Gulf of Mexico has a surface area of 1.63 million square kilometers (630,000 square miles) and a watershed area of 4.69 million square kilometers (1.81 million square miles) in the United States. This region is one of the nation's largest ecological systems and is closely linked to a significant portion of the nation's economy. In the Gulf Coast region, energy, fisheries, agriculture, and tourism rank among the most significant sectors of the economy. The Gulf has five of the top ten fishing ports in the United States, and commercial fisheries in the Gulf annually produce nearly 2 billion tons of fish, oysters, shrimps, and crabs. Gulf ports handle one-half of the nation's import-export tonnage. Petroleum produced in the Gulf represents about 80% of the nation's offshore production. The Gulf Coast region largely relies on many natural resources to fuel many important sectors of its economy. But nevertheless, the health and vitality of the Gulf have declined in recent years, caused in part by increasing populations along its coast and the growing demand upon its resources and in part by the accumulation of years of careless depletion, abuse, and neglect of the environment. Equally important are the impacts of natural and human-induced climate change on the economy and on the quality of life for millions of people living in the Gulf Coast region. The results have generated alarming increases in damage to and destruction of the ecosystems and habitats of the Gulf. This paper reviews the nature of global environmental change and addresses the potential health and environmental impacts that may occur in the Gulf Coast region of the United States as a consequence of various environmental alterations resulting from global change.

  17. Reservoirs and petroleum systems of the Gulf Coast

    USGS Publications Warehouse

    Pitman, Janet

    2010-01-01

    This GIS product was designed to provide a quick look at the ages and products (oil or gas) of major reservoir intervals with respect to the different petroleum systems that have been identified in the Gulf Coast Region. The three major petroleum source-rock systems are the Tertiary (Paleocene-Eocene) Wilcox Formation, Cretaceous (Turonian) Eagle Ford Formation, and Jurassic (Oxfordian) Smackover Formation. The ages of the reservoir units extend from Jurassic to Pleistocene. By combining various GIS layers, the user can gain insights into the maximum extent of each petroleum system and the pathways for petroleum migration from the source rocks to traps. Interpretations based on these data should improve development of exploration models for this petroleum-rich province.

  18. Tectonic boundaries of the eastern Gulf Coast of North America

    SciTech Connect

    Leonard, C. Jr.; Phillips, R.R. )

    1993-09-01

    Two Precambrian extensional fault episodes, recorded in mapping from central Arkansas across Mississippi, central Alabama, southern Georgia, and into the Atlantic Ocean affected later Pennsylvanian and Triassic tectonics. This interpretation is from magnetic anomaly data and is supported by seismic, gravity, core, and well-log data. The fault system was first suspected from an anomalous magnetic high, representing a feature that affected tectonism during the Ouachita and the Alleghenian orogenies of the eastern Gulf Coast and southeastern United States. The northernmost upthrown block is considered part of an ancient passive continental margin developed during the late Precambrian. The southern downthrown block is deformed by left-lateral transverse faults active during the Ouachita Orogeny. The Ouachita Orogeny may have deformed terrain farther east than the Black Worrior basin. These transverse fault blocks were buttressed by the footwall of the extensional fault system. These left-lateral faults extending from Florida and Georgia into Alabama, Mississippi, and southern Arkansas.

  19. Two Years of Hunting Exoplanets at Florida Gulf Coast University

    NASA Astrophysics Data System (ADS)

    Buzasi, Derek L.; Carboneau, Lindsey; Childs, Stephen; Colon, Tristan; Dumouchel, Emily; Glenn, William; Humphrey, Morgan; Hunter, Alana; Klunk, Derek; Myers, Riley; Nadreau, Jacob; Nance, Rebecca; Reynolds, Zachary; Romas, Olivia; Smith, Alexandra; Stansfield, Alexis; Sumler, Kendyll; Vignet-Williams, Gabrielle

    2017-06-01

    Honors Program participants at Florida Gulf Coast University must complete two of four required "Honors Experiences". One student option is a research experience, and we have developed a "Planet Hunters" course to provide an astronomical research track. In the course, students spend the first semester learning astronomical background and exoplanet detection techniques, while the second semester is devoted to planet searches in Kepler and K2 data, using student-oriented software tools developed specifically for the task. During the first year, students detected both a brown dwarf candidate and a hot Jupiter candidate. In this poster, we review the tools, data sets, and results obtained by students participating in the second year of the course, along with lessons learned for future implementation, including possible extension to TESS data.

  20. Origin, migration, and accumulation of petroleum in Gulf Coast Cenozoic

    SciTech Connect

    Jones, R.W.

    1986-05-01

    Explanations of the origin, migration, and accumulation of petroleum in the Gulf Coast upper Cenozoic must accommodate the following facts. (1) No specific source of the petroleum has ever been identified. (2) The most probable source section is 10,000-20,000 ft of low TOC (0.4-1.0 wt %) shale that underlies the reservoirs. (3) Tremendous volumes of dry gas have been generated in the middle and basal part of the source section. (4) More gas than oil is in the reservoirs. (5) The distribution of oil and gas accumulations in the Cenozoic is not primarily controlled by the distribution of terrestrial gas-prone organic facies and marine oil-prone organic facies, but by the relative ease of migration of the two hydrocarbon phases. For example, gas preferentially accumulates in the simpler structures, oil in the intrusive salt domes. (6) High pressure and high porosity in the source rock indicates that neither water movement nor continuous phase oil movement out of the source rock are likely to be significant factors in primary migration. (7) The situation is very dynamic, with generation, migration, and accumulation occurring today. (8) Faults are very important as controls on migration and accumulation of the petroleum. The interaction of these (and other) factors suggests that most oil reservoirs in the Gulf Coast upper Cenozoic sediments probably initially became mobile after being dissolved in gas in the source rock. The gas-oil mixture moved toward lower pressure areas adjacent to and in faults, and moved upward into reservoirs and traps along faults.

  1. Perspective on eastern migration studies: stopover ecology of migratory landbirds in the Gulf Coast region

    USGS Publications Warehouse

    Barrow, W.C.; Johnson Randall, L.A.

    2004-01-01

    Millions of Nearctic-Neotropical landbirds move through the coastal habitats of the Gulf of Mexico each spring and autumn as they migrate across and around the Gulf. Migration routes in the Gulf region are not static and they shift year to year and season to season according to prevailing wind patterns. Using data from field and radar studies, we mapped patterns of migration movement and landfall in the Gulf of Mexico region. Map categories include coastal areas where migrant numbers are consistently high, consistently common, sporadically common-abundant, sporadically common, or sparse. Weather surveillance radar data indicates that habitats along the Northwest Gulf Coast are consistently used each year.

  2. Oceanic and Atmospheric Patterns Associated with Hurricanes Making Gulf of Mexico vs. Atlantic Coast Landfalls

    NASA Astrophysics Data System (ADS)

    Paxton, C. H.; Collins, J. M.

    2011-12-01

    A multi-year clustering is apparent in the location of landfalling hurricanes of Category 2 or greater striking the U.S. Differences in the evolution of hurricane seasons in which landfalls were distinctly on the Gulf of Mexico vs. the Atlantic coast will be presented. Eight seasons with Gulf of Mexico coast landfalls and eight seasons with Atlantic coast landfalls were chosen to illustrate the atmospheric and ocean differences between the two landfall regimes. Monthly averages from December prior to the hurricane season through October were produced to show the evolution of the patterns. For example, La Niña onset was more likely to occur prior to the hurricane season in years with Atlantic coast landfalls, but the onset was later for Gulf of Mexico coast landfall years. More persistent westerly flow in February to May was common for the Gulf of Mexico landfalls, as were negative sea level pressure anomalies over the southern Pacific Ocean. Positive precipitable water anomalies over the main development region were significant and increased from February to September during Gulf of Mexico coast landfall years. Persistent sea level pressure anomalies were present over North Africa in the Atlantic landfalling years but not in the Gulf coast years. The results of this research can be used as guidance to indicate potential landfall locations of strong tropical cyclones during the coming hurricane season.

  3. Gulf Coast Ecosystem Restoration Council Seeks Public Comment on Priorities for $139.6 million

    EPA Pesticide Factsheets

    DALLAS - (Aug. 19, 2015) The Gulf Coast Ecosystem Restoration Council (Council) recently released a draft Initial Funded Priorities List that would fund approximately $139.6 million in restoration activities. The funds are derived from the recent se

  4. 75 FR 48739 - Application of Gulf Coast Airways, Inc. for Commuter Air Carrier Authority

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-11

    .... SUMMARY: The Department of Transportation is directing all interested persons to show cause why it should not issue an order finding Gulf Coast Airways, Inc., fit, willing, and able, and awarding it commuter...

  5. BIOGEOGRAPHY OF BENTHIC MACROINVERTEBRATES IN ESTUARIES ALONG THE GULF OF MEXICO AND WESTERN ATLANTIC COASTS

    EPA Science Inventory

    The community composition of benthic macroinvertebrates from 870 estuarine sites was examined to determine boundaries of biogeographical provinces along the Gulf of Mexico and western Atlantic coasts of the United States. Our objective was to confirm or challenge established boun...

  6. Indicators, Metric and Tools for Informing the Science and Vision of Gulf Coast Ecosystem Restoration

    EPA Science Inventory

    The Gulf Coast Ecosystem Restoration Council will oversee restoration efforts the under the recently passed RESTORE Act in response to the historic Deep Water Horizon oil spill in the Gulf of Mexico. The Council will develop a Comprehensive Restoration Plan using best available ...

  7. Indicators, Metric and Tools for Informing the Science and Vision of Gulf Coast Ecosystem Restoration

    EPA Science Inventory

    The Gulf Coast Ecosystem Restoration Council will oversee restoration efforts the under the recently passed RESTORE Act in response to the historic Deep Water Horizon oil spill in the Gulf of Mexico. The Council will develop a Comprehensive Restoration Plan using best available ...

  8. Seasonal levels of the Vibrio predator Bacteriovorax in Atlantic, Pacific and Gulf Coast Seawater

    USDA-ARS?s Scientific Manuscript database

    Bacteriovorax were quantified in US Atlantic, Gulf and Pacific seawater to determine baseline levels of these predatory bacteria and possible seasonal fluctuations in levels. Surface seawater was analyzed monthly for 1 year from Kailua-Kona, Hawaii; the Gulf Coast of Alabama; and four sites along t...

  9. Gulf of Fonseca, Pacifica coast of Central America as seen from Apollo 9

    NASA Image and Video Library

    1969-03-12

    AS09-19-3019 (3-13 March 1969) --- Gulf of Fonseca, on the Pacific coast of Central America, as photographed from the Apollo 9 spacecraft during its Earth-orbital mission. The gulf is shared by the nations of El Salvador, Honduras, and Nicaragua. The prominent volcano on the peninsula in Nicaragua is Volcan Cosiguina.

  10. Holocene climate and climate variability of the northern Gulf of Mexico and adjacent northern Gulf Coast: A review

    USGS Publications Warehouse

    Poore, Richard Z.

    2008-01-01

    Marine records from the northern Gulf of Mexico indicate that significant multidecadal- and century-scale variability was common during the Holocene. Mean annual sea-surface temperature (SST) during the last 1,400 years may have varied by 3°C, and excursions to cold SST coincide with reductions in solar output. Broad trends in Holocene terrestrial climate and environmental change along the eastern portion of the northern Gulf Coast are evident from existing pollen records, but the high-frequency details of climate variability are not well known. Continuous and well-dated records of climate change and climate variability in the western portion of the northern Gulf Coast are essentially lacking.Information on Holocene floods, droughts, and storm frequency along the northern Gulf Coast is limited. Records of floods may be preserved in continental shelf sediments, but establishing continuity and chronologies for sedimentary sequences on the shelf presents challenges due to sediment remobilization and redeposition during storms. Studies of past storm deposits in coastal lakes and marshes show promise for constructing records of past storm frequency. A recent summary of sea-level history of the northern Gulf Coast indicates sea level was higher than modern sea level several times during the last few thousand years.

  11. Identification of geopressured occurrences outside of the Gulf Coast. Final report, Phase I

    SciTech Connect

    Strongin, O.

    1980-09-30

    As an extension of its efforts in the development of the geopressured resources of the Gulf Coast, the Division of Geothermal Energy of the US Department of Energy is interested in determining the extent and characteristics of geopressured occurrences in areas outside the Gulf Coast. The work undertaken involved a literature search of available information documenting such occurrences. Geopressured reservoirs have been reported from various types of sedimentary lithologies representing virtually all geologic ages and in a host of geologic environments, many of which are unlike those of the Gulf Coast. These include many Rocky Mountain basins (Green River, Big Horn, Powder River, Wind River, Uinta, Piceance, Denver, San Juan), Mid-Continent basins (Delaware, Anadorko, Interior Salt, Williston, Appalachian), California basins (Sacramento, San Joaquin, Los Angeles, Ventura, Coast Ranges), Alaskan onshore and offshore basins, Pacific Coast offshore basins, and other isolated occurrences, both onshore and offshore.

  12. Geological evaluation of Gulf Coast salt domes: overall assessment of the Gulf Interior Region

    SciTech Connect

    1981-10-01

    The three major phases in site characterization and selection are regional studies, area studies, and location studies. This report characterizes regional geologic aspects of the Gulf Coast salt dome basins. It includes general information from published sources on the regional geology; the tectonic, domal, and hydrologic stability; and a brief description the salt domes to be investigated. After a screening exercise, eight domes were chosen for further characterization: Keechi, Oakwood, and Palestine Domes in Texas; Vacherie and Rayburn's domes in North Louisiana; and Cypress Creek and Richton domes in Mississippi. A general description of each, maps of the location, property ownership, and surface geology, and a geologic cross section were presented for each dome.

  13. 77 FR 66580 - Notice of Availability of the Record of Decision (ROD) for the Gulf Coast Pipeline Project

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-06

    ... Coast Pipeline Project AGENCY: Natural Resources Conservation Service, USDA. ACTION: Notice of... Wetland Reserve Program, to allow the Gulf Coast Segment (Gulf Coast Pipeline Project) of the TransCanada Keystone Pipeline, LP to cross one NRCS held conservation easement in Fannin County, Texas associated...

  14. Fog chemistry in the Texas-Louisiana Gulf Coast corridor

    NASA Astrophysics Data System (ADS)

    Raja, Suresh; Raghunathan, Ravikrishna; Yu, Xiao-Ying; Lee, Taehyoung; Chen, Jing; Kommalapati, Raghava R.; Murugesan, Karthik; Shen, Xinhua; Qingzhong, Yuan; Valsaraj, Kalliat T.; Collett, Jeffrey L.

    Fog samples were collected in two population centers of the US Gulf Coast (Houston, Texas and Baton Rouge, Louisiana) using Caltech active strand cloud collectors. A total of 32 fogwater samples were collected in Baton Rouge (November 2004-February 2005) and Houston (February 2006). These samples were analyzed for pH, total and dissolved organic carbon, major inorganic ions, and a variety of organic compounds including organic acids, aromatics, carbonyls, and linear alkanes. Fogs in both environments were of moderate density, with typical fog liquid water contents <100 mg m -3. Fog samples collected in Houston reflect a clear influence of marine and anthropogenic inputs, while Baton Rouge samples also reflect agricultural inputs. The volume-weighted mean fog pH was somewhat more acidic (˜4.3) in Houston than in Baton Rouge (˜5.0). A wide pH range was observed in fog at both locations. Houston fog had higher concentrations of Cl -, NO 3-, Na +, Mg 2+, and Ca 2+. Sulfate to nitrate ratios were high in fogs at both locations, typical of many clouds in the eastern US. Total organic carbon concentrations were much higher in Houston fogs than in Baton Rouge fogs. Efforts to speciate dissolved organic carbon (DOC) reveal large contributions from organic acids and carbonyls, with smaller contributions from other organic compound families including aromatics, alkanes, amides, and alcohols. Approximately 40% of the fog DOC was unspeciated in samples from both study locations.

  15. Tracking sandhill crane migration from Saskatchewan to the Gulf Coast

    USGS Publications Warehouse

    Hjertaas, D.G.; Ellis, D.H.; Johns, B.W.; Moon, S.L.

    2001-01-01

    Four adult sandhill cranes (Grus canadensis rowani) were captured in east-central Saskatchewan, equipped with transmitters, and tracked by satellite to determine if their migration routes and wintering areas would allow their use as guide birds to establish a new migratory flock of whooping cranes (G. americana). Two birds captured near Yorkton died or their transmitters were lost before migration. Two adults from the Overflowing River moved to staging areas in southern Saskatchewan in September. By 29 September, Crane A left Saskatchewan and moved to North Dakota where it remained until late October. By 21 December, it arrived a few km inland from the Gulf Coast near McFaddin, Texas, 3,378 km from its capture location. It remained there until at least 9 March 1995. On 15 March, it was relocated near Grand Island, Nebraska and by 20 April, it had returned to the Overflowing River area. Crane B spent most of September and October near the Quill Lakes, Saskatchewan, then migrated with brief stops in South Dakota and Kansas, arriving 29 November at its winter area near the northwestern comer of the Laguna Madre in Tamaulipas, Mexico, 3,998 km from its summering area. It remained there until at least 25 December, whereafter no further transmissions were received. Because both cranes wintered or migrated near the current whooping crane winter area at Aransas National Wildlife Refuge (Aransas), Texas, this population was judged unsuitable to provide guide birds for a new flock of whooping cranes.

  16. Evidence for vertical movement of diagenetic fluids, Texas Gulf Coast

    SciTech Connect

    Land, L.S.

    1984-04-01

    Both the study of burial diagenesis and the study of present-day formation waters of Jurassic through Pleistocene formations from the Texas Gulf Coast document local vertical fluid transport of at least several kilometers. Evidence includes the following: (1) discharge at the land surface of Mesozoic-derived brines as bad water; (2) emplacement of Mississippi Valley-type lead-zinc mineralization by fluids derived from Mesozoic formations in salt dome cap rocks at or near the land surface; (3) emplacement of uranium in Tertiary aquifers as a result of reduction by ascending reduced sulfur, presumably of Mesozoic origin; (4) emplacement of calcite cement derived from Mesozoic strata Tertiary sandstones; and (5) presence of fluids in Plio-Pleistocene rocks with chemical signatures that could only have been derived from Mesozoic strata. Material-transport calculations indicate that the volumes of fluid involved far exceed the volume of connate water deposited in the basin, strongly suggesting some mechanism of thermally driven convective flow.

  17. Effects of inherited pre-Jurassic tectonics on Gulf Coast

    SciTech Connect

    Adams, R.L.

    1989-03-01

    Extensional and compressional tectonic features from the Canadian shield to the Gulf Coast reflect repeated and continued movement of crustal elements along northwest-southeast paths. Resultant rift and thrust features formed perpendicular to that orientation. Cycles of ocean opening (rifting), quiescence, and ocean closure (thrusting) controlled the structural style and stratigraphic sequences that recorded the accretion of much of the North American craton onto the Canadian shield. The Triassic separation of North America from South America resulted in an irregular fragmented arc that now extends from Central America to southern Florida. Stranded blocks of continental crust, left behind when spreading centers jumped during rifting, control the location of major basins over the attenuated crust between the blocks. The former location of the Yucatan Peninsula is now marked by the salt dome basins of central Mississippi, southern Louisiana, and southeastern Texas. Postrifting tectonic patterns retain an inherited fabric reflecting the Triassic rifting. Triassic horsts, grabens, and half grabens localized and delineated later microbasins. The term microbasin is a limited area of deposition whose boundaries reflect, or can be presumed to reflect, buried basement-related faulting.

  18. Source of oils in Gulf Coast Cenozoic reservoirs

    SciTech Connect

    Curtis, D.M. )

    1989-09-01

    Many Gulf Coast geologists have assumed that shales interbedded with or adjacent to the reservoir sandstones are source rocks for oils in Cenozoic reservoirs, but few source-rock quality shales have been identified in Cenozoic strata. Reservoirs and their associated shales are in thermally immature and organic-poor intervals. Based on geothermal gradient, age, and depth, it can be shown that thermally mature source rocks should be present in older slope shales beneath each producing trend. Assumptions regarding the source rock potential of the interbedded thermally immature shales derive from the fact that hydrocarbons migrated into traps soon after burial of the reservoir (early migration). Early migration from the source rock was therefore also assumed (shallow burial, early migration model). Review of the geochemical requirements for a source rock shows that geochemical constraints demand late migration from the source rock after many thousands of feet of burial (deep burial, late migration model). Geological and geochemical concepts are compatible, however, if migration out of the source rock was late (long after deposition and deep burial of the source rock) but migration into the reservoir was early (soon after shallow burial of the reservoir and trap system).

  19. Evidence for vertical movement of diagenetic fluids, Texas Gulf Coast

    SciTech Connect

    Land, L.S.

    1984-04-01

    Both the study of burial diagenesis and the study of present-day formation waters of Jurassic through Pleistocene formations from the Texas Gulf Coast document local vertical fluid transport of at least several kilometers. Evidence includes the following: (1) discharge at the land surface of Mesozoic-derived brines as bad water; (2) emplacement of Mississippi Valley-type lead-zinc mineralization by fluids derived from Mesozoic formations in salt dome cap rocks at or near the land surface; (3) emplacement of uranium in Tertiary aquifers as a result of reduction by ascending reduced sulfur, presumably of Mesozoic origin; (4) emplacement of calcite cement derived from Mesozoic strata Tertiary sandstones; and (5) presence of fluids in Plio-Pleistocene rocks with chemical signatures that could only have been derived from Mesozoic strata. Material-transport calculations indicate that the volumes of fluid involved far exceed the volume of connate water deposited in the basin, strongly suggesting some mechanism of thermally driven convective flow.

  20. Land subsidence associated with hydrocarbon production, Texas Gulf Coast

    SciTech Connect

    Kreitler, C.W.; White, W.A.; Akhter, M.S.

    1988-01-01

    Although ground-water withdrawal has been the predominant cause of land subsidence in the Texas Gulf Coast, localized subsidence and faulting have also resulted from hydrocarbon production. Subsidence was documented as early as the 1920s over the Goose Creek field. Since then, subsidence and/or faulting have been identified over the Saxet, South Houston, Chocolate Bayou, Hastings, Alco-Mag, Clinton, Mykawa, Blue Ridge, Webster, and Caplen oil fields. Oil-production-related subsidence over these fields generally creates few environmental or engineering problems. One exception is the subsidence and faulting over the Caplen oil field on Bolivar Peninsula, where more than 1,000 ac of saltwater marsh has been replaced by subaqueous flats. Subsidence may be occurring over other fields but has not been identified because of limited releveled benchmark data. An evaluation of drill-stem and bottom-hole pressure data for the Frio Formation in Texas indicates extensive depressurization presumably from hydrocarbon production. Nearly 12,000 measurements from a pressure data base of 17,000 measurements indicate some depressurization. Some of the Frio zones have pressure declines of more than 1,500 psi from original hydrostatic conditions. Subsidence and faulting may be associated with these fields in the Frio as well as other Tertiary formations where extensive hydrocarbon production and subsequent depressurization have occurred.

  1. U.S. Gulf Coast as seen from Gemini 11 spacecraft

    NASA Technical Reports Server (NTRS)

    1966-01-01

    U.S. Gulf coast area from Aransas Bay, Texas to Mobile Bay, Alabama, as seen from the Gemini 11 spacecraft during its 29th revolution of the earth. The Galveston Bay and Houston area is in center of photograph. Further eastward along the coast can be seen the Mississippi River delta and New Orleans area.

  2. Tertiary volcanic rocks and the potassium content of Gulf Coast shales—The smoking gun

    NASA Astrophysics Data System (ADS)

    Bloch, John; Hutcheon, Ian E.; de Caritat, Patrice

    1998-06-01

    The majority of Tertiary volcanic rocks of the western United States and Mexico are alkaline in composition and may contain as much as 50 wt% equivalent K-feldspar. Emplacement of these volcanic strata is coeval with Tertiary shale deposition in the Texas Gulf Coast, and they previously have been identified as likely sources of sediment for Gulf Coast shales. Evaluation of chemical trends in Gulf Coast shales, particularly K2O, indicates changes in sediment composition in the lower Eocene, Oligocene, and near the Oligocene-Miocene boundary. In particular, there is a 250% increase in K2O content from ˜2 wt% to ˜5 wt% from the late Eocene to the early Oligocene. Gulf Coast shale bulk-rock compositions are consistent with a Tertiary volcanic source. Estimates of erosion and mass balance calculations suggest that in the south Texas Gulf Coast, the Oligocene Frio Formation may contain between 60% and 85% volcanic detritus, and coeval Frio shales to the north contain ˜25%. Vertical and lateral compositional variations highlight variable abundances of source detritus and the effects of weathering and depositional processes on Gulf Coast shale composition. Trends of increasing K2O content with depth in Gulf Coast shales previously have been interpreted to result from open-system diagenesis and K-metasomatism at depth. The data presented herein suggest instead that these trends result from variable provenance and the influx of large volumes of Tertiary alkaline volcanic material. Therefore, diagenetic models that invoke a homogeneous initial shale composition and open-system behavior may be invalid.

  3. Sweet Lake geopressured-geothermal project, Magma Gulf-Technadril/DOE Amoco fee. Volume III. Final report. Annual report, February 1982-March 1985

    SciTech Connect

    Durham, C.O. Jr.; O'Brien, F.D.; Rodgers, R.W.

    1985-01-01

    This report presents the results of the testing of Sand 3 (15,245 to 15,280 feet in depth) which occurred from November 1983 to March 1984 and evaluates these new data in comparison to results from the testing of Sand 5 (15,385 to 15,415 feet in depth) which occurred from June 1981 to February 1982. It also describes the reworking of the production and salt water disposal wells preparatory to the Sand 3 testing as well as the plug and abandon procedures requested to terminate the project. The volume contains two parts: Part 1 includes the text and accompanying plates, figures and tables; Part 2 consists of the appendixes including auxiliary reports and tabulations.

  4. Geopressured-geothermal drilling and testing plan: Magma Gulf/Technadril-Dept. of Energy MGT-DOE AMOCO Fee No. 1 well, Cameron Parish, Lousiana

    SciTech Connect

    Not Available

    1980-07-01

    The following topics are covered: generalized site activities, occupational health and safety, drilling operations, production testing, environmental assessment and monitoring plan, permits, program management, reporting, and schedule. (MHR)

  5. 77 FR 39169 - Eighth Coast Guard District Annual Safety Zones; Blue Angels Air Show; Gulf of Mexico & Santa...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-02

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Eighth Coast Guard District Annual Safety Zones; Blue Angels Air Show; Gulf of Mexico & Santa Rosa Sound; Pensacola, FL AGENCY: Coast Guard, DHS. ACTION: Notice of enforcement of regulation. SUMMARY: The Coast Guard will enforce a Safety Zone for the Blue...

  6. Venezuelan Equine Encephalitis Virus Activity in the Gulf Coast Region of Mexico, 2003–2010

    PubMed Central

    Adams, A. Paige; Navarro-Lopez, Roberto; Ramirez-Aguilar, Francisco J.; Lopez-Gonzalez, Irene; Leal, Grace; Flores-Mayorga, Jose M.; Travassos da Rosa, Amelia P. A.; Saxton-Shaw, Kali D.; Singh, Amber J.; Borland, Erin M.; Powers, Ann M.; Tesh, Robert B.; Weaver, Scott C.; Estrada-Franco, Jose G.

    2012-01-01

    Venezuelan equine encephalitis virus (VEEV) has been the causative agent for sporadic epidemics and equine epizootics throughout the Americas since the 1930s. In 1969, an outbreak of Venezuelan equine encephalitis (VEE) spread rapidly from Guatemala and through the Gulf Coast region of Mexico, reaching Texas in 1971. Since this outbreak, there have been very few studies to determine the northward extent of endemic VEEV in this region. This study reports the findings of serologic surveillance in the Gulf Coast region of Mexico from 2003–2010. Phylogenetic analysis was also performed on viral isolates from this region to determine whether there have been substantial genetic changes in VEEV since the 1960s. Based on the findings of this study, the Gulf Coast lineage of subtype IE VEEV continues to actively circulate in this region of Mexico and appears to be responsible for infection of humans and animals throughout this region, including the northern State of Tamaulipas, which borders Texas. PMID:23133685

  7. Mating success of two geographically distinct populations of Gulf Coast ticks, Amblyomma maculatum Koch.

    PubMed

    Ketchum, H R; Teel, P D; Strey, O F; Longnecker, M T

    2006-08-31

    Gulf Coast ticks collected from Refugio Co., TX and Osage Co., KS are reproductively compatible despite differences in genetic haplotypes, geographic separation and seasonal phenologies. Two heifers per mating combination (TX males x TX females, KS males x KS females, TX males x KS females, KS males x TX females) were each infested with 360 pairs of Gulf Coast ticks. Only mean pre-oviposition and mean egg conversion efficiency index for the Texas male-Kansas female mating were significantly different (p<0.05) from other mating treatments. These females began oviposition 1-day later and used 4% less body mass toward egg production when compared to site-specific matings. However, the overall trend in reproductive performance of reciprocal tick matings was slightly lower than that of site-specific matings. There appear to be no pre-zygotic barriers to mating among Gulf Coast ticks from these Texas and Kansas populations.

  8. Venezuelan equine encephalitis virus activity in the Gulf Coast region of Mexico, 2003-2010.

    PubMed

    Adams, A Paige; Navarro-Lopez, Roberto; Ramirez-Aguilar, Francisco J; Lopez-Gonzalez, Irene; Leal, Grace; Flores-Mayorga, Jose M; Travassos da Rosa, Amelia P A; Saxton-Shaw, Kali D; Singh, Amber J; Borland, Erin M; Powers, Ann M; Tesh, Robert B; Weaver, Scott C; Estrada-Franco, Jose G

    2012-01-01

    Venezuelan equine encephalitis virus (VEEV) has been the causative agent for sporadic epidemics and equine epizootics throughout the Americas since the 1930s. In 1969, an outbreak of Venezuelan equine encephalitis (VEE) spread rapidly from Guatemala and through the Gulf Coast region of Mexico, reaching Texas in 1971. Since this outbreak, there have been very few studies to determine the northward extent of endemic VEEV in this region. This study reports the findings of serologic surveillance in the Gulf Coast region of Mexico from 2003-2010. Phylogenetic analysis was also performed on viral isolates from this region to determine whether there have been substantial genetic changes in VEEV since the 1960s. Based on the findings of this study, the Gulf Coast lineage of subtype IE VEEV continues to actively circulate in this region of Mexico and appears to be responsible for infection of humans and animals throughout this region, including the northern State of Tamaulipas, which borders Texas.

  9. Gulf Coast regional aquifer-system analysis; a Mississippi perspective

    USGS Publications Warehouse

    Grubb, H.F.

    1986-01-01

    The Gulf Coast Regional Aquifer-System Analysis is a study of regional aquifers in sediments of mostly Cenozoic age in an area of about 230,000 sq mi in the Central Plain of Alabama, Arkansas , Florida, Illinois, Kentucky, Louisiana, Mississippi, Missouri, Tennessee, and Texas, and an additional 60,000 sq mi offshore. Three aquifer systems have been identified: the Mississippi embayment aquifer system, the Texas coastal uplands aquifer system, and the coastal lowlands aquifer system. These aquifer systems thicken from < 100 ft near their updip limit to thousands of ft gulfward toward their downdip limits. The Mississippi embayment aquifer system exceeds 5,000 ft in thickness in central Louisiana and in southwestern Mississippi. The thickest area in southwestern Mississippi underlies most of the six Mississippi counties, centered around Jefferson County. The greatest thickness of the coastal lowlands aquifer system in Mississippi occurs in southern Hancock County where the system is composed of several individual aquifers and confining units. There are seven aquifers and three confining units in the Mississippi embayment aquifer system, five aquifers and two confining units in the Texas coastal uplands aquifer system, and five aquifers and two confining units in the coastal lowlands aquifer system. Most of the thicker parts of each aquifer system contain moderately saline to very saline water. Water in the Mississippi embayment aquifer system is moderately saline to very saline in most of a seven county area in southwestern Mississippi. About 9,600 million gal/day (gpd) of ground water was pumped from the aquifers in the study area during 1980. About 15% of that pumpage (or about 1,400 million gpd was in Mississippi, mostly from the Mississippi River Valley alluvial aquifer of the Mississippi embayment aquifer system. About 10% of the Mississippi pumpage, or 140 million gpd, was from the coastal lowlands aquifer system. Preliminary results from simulation of

  10. An Integrated Gulf Coast Monitoring System Using Field, Remote Sensing and Model Results (Invited)

    NASA Astrophysics Data System (ADS)

    D'Sa, E. J.; Ko, D. S.; Stone, G.; Walker, N. D.

    2010-12-01

    The northern Gulf of Mexico is strongly influenced by the discharge of water, nutrients, dissolved and suspended particulate matter from the Mississippi-Atchafalaya River system, the largest in North America. It is also frequently impacted by energetic meteorological events that cause storm surge, high waves and affects water quality along its coastal waters. We describe the components of an integrated web-based Gulf Coast Information System (GCIS) (http://gulf-coast.lsu.edu) developed to serve remotely sensed products from a number of NASA satellite sensors such as the SeaWiFS and MODIS ocean color and the QuikSCAT wind sensors. GCIS also serves high-resolution nowcast and 48-hour forecast outputs (sea level variations, temperature, salinity and currents) from a 3-dimensional NCOM coastal circulation model for the coastal states of Mississippi, Louisiana and Texas. The GCIS is coupled to the near real-time outputs of a field monitoring and satellite receiving system, the Wave-Current Information System (WAVCIS) (http://www.wavcis.lsu.edu) and Earth Scan Laboratory (ESL) (www.esl.lsu.edu), respectively that provide critical decision support during hurricanes to the Gulf Coast. We present results on the use of the combined field, satellite and model outputs to monitor the effects of fronts, hurricanes, oil spill and the potential to study longer term climate impacts along the Gulf coast.

  11. 77 FR 76066 - Endangered and Threatened Wildlife and Plants; Draft Recovery Plan for the Gulf Coast Jaguarundi

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-26

    ... viable populations and genetic exchange of the Gulf Coast jaguarundi in southern Texas and in Mexico. Reduce the effects of human population growth and development on potential Gulf Coast jaguarundi habitat... increasing population numbers and habitat quality and quantity. The revised recovery plan focuses...

  12. 78 FR 43959 - In the Matter of American Technologies Group, Inc., Bonanza Oil & Gas, Inc., and Gulf Coast Oil...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-22

    ... COMMISSION In the Matter of American Technologies Group, Inc., Bonanza Oil & Gas, Inc., and Gulf Coast Oil... information concerning the securities of Bonanza Oil & Gas, Inc. because it has not filed any periodic reports... a lack of current and accurate information concerning the securities of Gulf Coast Oil & Gas,...

  13. 33 CFR 334.782 - SUPSHIP Gulf Coast, Pascagoula, Mississippi, Detachment Mobile, Alabama at AUSTAL, USA, Mobile...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ..., Mississippi, Detachment Mobile, Alabama at AUSTAL, USA, Mobile, Alabama; restricted area. 334.782 Section 334... DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.782 SUPSHIP Gulf Coast, Pascagoula, Mississippi..., Conversion and Repair, USN, Gulf Coast, Pascagoula, Mississippi or his/her authorized representative. (2)...

  14. 33 CFR 334.782 - SUPSHIP Gulf Coast, Pascagoula, Mississippi, Detachment Mobile, Alabama at AUSTAL, USA, Mobile...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ..., Mississippi, Detachment Mobile, Alabama at AUSTAL, USA, Mobile, Alabama; restricted area. 334.782 Section 334... DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.782 SUPSHIP Gulf Coast, Pascagoula, Mississippi..., Conversion and Repair, USN, Gulf Coast, Pascagoula, Mississippi or his/her authorized representative. (2)...

  15. Metal concentrations in pearl oyster, Pinctada radiata, collected from Saudi Arabian coast of the Arabian Gulf

    SciTech Connect

    Sadig, M.; Alam, I.

    1989-01-01

    The Arabian Gulf is a shallow semi-closed water body. Several industrial complexes have been established along its coast line during the past decade. The effluent from these facilities is being discharged into the Gulf. These discharges pose potential hazards to the marine environment of the Arabian Gulf. The Saudi Arabian government is striving to protect the marine environment of the Gulf and has commissioned several studies to assess the damage from the industrial and municipal discharges. In these studies, marine organisms, for example, fish, clams, sea urchins, oysters, and plankton, along with sediments and seawater, have been analyzed for various pollutants. This study reports metal concentrations in pearl oysters collected from the Saudi Arabian coastal areas of the Arabian Gulf.

  16. Upper Paleocene and lowermost Eocene angiosperm pollen biostratigraphy of the eastern Gulf Coast and Virginia

    USGS Publications Warehouse

    Frederiksen, N.O.

    1998-01-01

    Strata comprising most of the upper Paleocene in eastern North America are divided into two new pollen zones, the Carya and Platycarya platycaryoides Interval Zones. Pollen data have proven to be important for correlations between Alabama-western Georgia and eastern Mississippi and between the eastern Gulf Coast and Virginia. Migration of tropical plant taxa from the Caribbean to the Gulf Coast began at least 4 m.y. before the end of the Paleocene. The Terminal Paleocene Extinction Event, accompanied by a distinct pulse of plant immigration from Europe, began several hundred thousand years before the end of the Paleocene.

  17. Tropical Storm Database - East and Gulf of Mexico Coasts of the United States

    DTIC Science & Technology

    1995-03-01

    This technical note describes the availability of a database of tropical storm surge elevations and currents produced from the numerical simulation of 134 historically based events that impacted the east and Gulf of Mexico coasts of the United States. The database consists of surge data hydrographs recorded at 486 discrete locations along the east and gulf coasts and Puerto Rico. Also described are a summary atlas and cross reference tables of storm track and maximum storm surge corresponding to a 246-station nearshore subset of the 486-location database.

  18. Northern Gulf of Mexico: USGS science contributions to a resilient coast, 2006-2011

    USGS Publications Warehouse

    ,

    2007-01-01

    The devastating hurricane season of 2005 challenged U.S. Geological Survey (USGS) to develop a science base for resource managers and policy makers that could provide an understanding of the multiple stressors and influence affecting the northern Gulf of Mexico coast and to rack changes in linked coastal systems. The complexity of the Gulf Coast requires a science strategy for data collection and data reporting that is consistent across regional ecosystems and that can be applied to both short-term and long-term responses to stressors.

  19. Children's Attachment-Related Narratives Following US Gulf Coast Hurricanes: Linkages with Understanding and Teacher Stress

    ERIC Educational Resources Information Center

    Page, Timothy; Buchanan, Teresa K.; Verbovaya, Olga

    2016-01-01

    The central focus of this study was the perceptions of emotional security among 64 elementary school-aged children exposed to the hurricanes that affected the US Gulf Coast in 2005. Specifically, we examined the representational qualities of attachment, exploration, and caregiving as assessed with a narrative story-stem task in relation to…

  20. Educational Plant Survey: Gulf Coast Community College, May 16-18, 1995.

    ERIC Educational Resources Information Center

    Glass, Ruth S.; Farr, Loyce K.

    Pursuant to Florida educational legislation, this report presents findings of an educational plant survey conducted in May 1995 at Gulf Coast Community College (GCCC). The report is designed to aid the formulation of plans for housing the educational program, student population, faculty, administrators, staff, and auxiliary and ancillary services…

  1. A survey of estuarine submerged aquatic vegetation in the northern Gulf coast

    USGS Publications Warehouse

    Carter, J.

    2003-01-01

    The status of submerged aquatic vegetation along the northern Gulf of Mexico is of concern because of its role in the ecology and economy of the coast. Recent studies by U.S. Geological Survey scientists help assess the factors that contribute to SAV distribution and health.

  2. Matagorda Bay, Gulf Coast of Texas as seen from the Apollo 7 spacecraft

    NASA Technical Reports Server (NTRS)

    1968-01-01

    Matagorda Bay area on the Gulf Coast of Texas as seen from the Apollo 7 spacecraft during its 62nd revolution of the earth. Photographed from an altitude of 90 nautical miles, at ground elapsed time of 98 hours and 38 minutes.

  3. Gulf Coast area from Texas to Louisiana seen from the Gemini 12 spacecraft

    NASA Technical Reports Server (NTRS)

    1966-01-01

    Gulf Coast area from Matagorda Bay, Texas to Vermillion Bay, Louisiana, looking east, as seen from the Gemini 12 spacecraft during its 44th revolution of the earth. Galveston Bay is in center of picture. Houston and its environs are clearly visible. Note network of freeways and superhighways. Large lake near left center of picture is the Sam Rayburn Reservoir.

  4. Using High Resolution Satellite Imagery to Map Black Mangrove on the Texas Gulf Coast

    USDA-ARS?s Scientific Manuscript database

    QuickBird false color satellite imagery was evaluated for distinguishing black mangrove [Avicennia germinans (L.) L.] populations on the south Texas Gulf Coast. The imagery had three bands (green, red, and near-infrared) and contained 11-bit data. Two subsets of the satellite image were extracted ...

  5. BIOGEOGRAPHY OF BENTHIC MACROINVERTEBRATES IN ESTUARIES ALONG THE GULF OF MEXICO AND WESTERN ATLANTIC COASTS

    EPA Science Inventory

    The community composition of benthic macroinvertebrates from 870 estuarine sites was examimed in order to either confirm or challenge established boundaries of biogeographical provinces along the Gulf of Mexico and western Atlantic coasts of the United States. The objective was t...

  6. Potential new blueberry cultivars for the Gulf Coast Region of the U.S

    USDA-ARS?s Scientific Manuscript database

    Several new elite rabbiteye and southern highbush blueberry strains developed from diverse origins and having potential for release as new blueberry cultivars for the Gulf Coast region of the U.S. have been developed. Promising new early ripening and vigorous new rabbiteye blueberry strains being c...

  7. Potential new blueberry cultivars for the Gulf Coast region of the U.S.

    USDA-ARS?s Scientific Manuscript database

    Several new elite rabbiteye and southern highbush blueberry strains developed from diverse origins and having potential for release as new blueberry cultivars for the Gulf Coast region of the U.S. have been developed. Promising new early ripening and vigorous new rabbiteye blueberry strains being c...

  8. Lessons learned using water quality models to develop numeric nutrient criteria for a Gulf coast estuary

    EPA Science Inventory

    Pensacola Bay is a shallow, mesotrophic estuary located in the north-central coast of the Gulf of Mexico, US. In November 2012, the US Environmental Protection Agency (US EPA) proposed numeric total nitrogen (TN), total phosphorus (TP), and chlorophyll-a (chl-a) water quality cr...

  9. The Gulf Coast Future Issues Council, Inc. Summary Report, June 1, 1984 to November 30, 1984.

    ERIC Educational Resources Information Center

    Vaughan, Jerry L.

    Focusing on the period from June, 1984 through November, 1984, this report summarizes the activities of the Gulf Coast Future Issues Council (GCFIC), a non-profit corporation organized as a coordination center of community research, forecasting, trend analysis, and educational activities. After introductory material that highlights the role of the…

  10. Characteristics of Concurrent/Dual Credit Students in the Gulf Coast Community Colleges of Texas

    ERIC Educational Resources Information Center

    Preston, David L.

    2006-01-01

    The Gulf Coast Association for Institutional Research (GCAIR) conducted a study of those concurrent/dual credit (CDC) students enrolled fall semester, 2001. The purpose was to determine a profile for this group of students which included gender, ethnicity, GPA, re enrollment, etc. Since there has been little research done on these students,…

  11. Seasonal infestations of two stem borers (Lepidoptera: Crambidae) in noncrop grasses of Gulf Coast rice agroecosystems

    USDA-ARS?s Scientific Manuscript database

    Infestations of two stem borers, the Mexican rice borer, Eoreuma loftini (Dyar) and the sugarcane borer, Diatraea saccharalis (F.) (Lepidoptera: Crambidae), were compared in non-crop grasses adjacent to rice, Oryza sativa L., fields. Three farms in the Texas Gulf Coast rice production area were sur...

  12. Characterization of a West Nile Virus Isolate from a Human on the Gulf Coast of Texas

    PubMed Central

    Granwehr, Bruno P.; Li, Li; Davis, Charles T.; Beasley, David W. C.; Barrett, Alan D. T.

    2004-01-01

    Genetic characterization of a human cerebrospinal fluid West Nile virus isolate from Beaumont, Texas, revealed several nucleotide changes and amino acid substitutions that differentiated it from all other North American strains isolated to date, suggesting that isolates from the Texas Gulf Coast may form a unique genetic group among North American strains. PMID:15528747

  13. Children's Attachment-Related Narratives Following US Gulf Coast Hurricanes: Linkages with Understanding and Teacher Stress

    ERIC Educational Resources Information Center

    Page, Timothy; Buchanan, Teresa K.; Verbovaya, Olga

    2016-01-01

    The central focus of this study was the perceptions of emotional security among 64 elementary school-aged children exposed to the hurricanes that affected the US Gulf Coast in 2005. Specifically, we examined the representational qualities of attachment, exploration, and caregiving as assessed with a narrative story-stem task in relation to…

  14. Initial estimates of hurricane Katrina impacts of Mississippi gulf coast forest resources

    Treesearch

    Patrick A. Glass; Sonja N. Oswalt

    2007-01-01

    Hurricane Katrina pummeled the Gulf Coast of Mississippi on August 29, 2005. The eye wall of the storm passed directly over Hancock and Pearl River Counties. Harrison, Jackson, Stone, and George Counties on the windward side of the hurricane's path sustained severe damage before the storm's strength dissipated as it moved farther inland (fig. 1).

  15. Status of Mississippi gulf coast Live Oak trees after Hurricane Katrina

    Treesearch

    Julie Ann Dobbs; David W. Held; Nebeker T. Evan

    2006-01-01

    Live oak trees, Quercus virginiana, have long been considered to be the symbol of the Old South. Part of the attraction of the Atlantic and Gulf Coasts is the stately live oaks. These majestic live oaks have weathered many hurricanes in their >200 yr life span. Most recently, on 29 August 2005 Hurricane Katrina, with sustained winds exceeding 160...

  16. Understanding the science of climate change: Talking points - Impacts to the Gulf Coast

    Treesearch

    Rachel Loehman; Greer Anderson

    2010-01-01

    Predicted climate changes in the Gulf Coast bioregion include increased air and sea surface temperatures, altered fire regimes and rainfall patterns, increased frequency of extreme weather events, rising sea levels, increased hurricane intensity, and potential destruction of coastal wetlands and the species that reside within them. Prolonged drought conditions, storm...

  17. Landsat Imagery: A Tool for Updating Land Use in Gulf Coast Mexico

    ERIC Educational Resources Information Center

    Harnapp, Vern

    1978-01-01

    Explores the use of Landsat imagery in mapping and updating land use for the purpose of planning. Examines Gulf Coast Mexico as a case study, because modern agricultural techniques used to expand the ranching industry have significantly altered the landscape. (Author/BC)

  18. BIOGEOGRAPHY OF BENTHIC MACROINVERTEBRATES IN ESTUARIES ALONG THE GULF OF MEXICO AND WESTERN ATLANTIC COASTS

    EPA Science Inventory

    The community composition of benthic macroinvertebrates from 870 estuarine sites was examimed in order to either confirm or challenge established boundaries of biogeographical provinces along the Gulf of Mexico and western Atlantic coasts of the United States. The objective was t...

  19. Gulf of Mexico, coast of Yucatan, as seen from the Apollo 7 spacecraft

    NASA Image and Video Library

    1968-10-13

    AS07-05-1635 (13 Oct. 1968) --- Gulf of Mexico, coast of Yucatan, Mexico, as seen from the Apollo 7 spacecraft during its 33rd revolution of Earth. Note road leading to city of Merida which is under cloud cover. Photographed from an altitude of 123 nautical miles, at ground elapsed time of 52 hours and 37 minutes.

  20. Lessons learned using water quality models to develop numeric nutrient criteria for a Gulf coast estuary

    EPA Science Inventory

    Pensacola Bay is a shallow, mesotrophic estuary located in the north-central coast of the Gulf of Mexico, US. In November 2012, the US Environmental Protection Agency (US EPA) proposed numeric total nitrogen (TN), total phosphorus (TP), and chlorophyll-a (chl-a) water quality cr...

  1. Landsat Imagery: A Tool for Updating Land Use in Gulf Coast Mexico

    ERIC Educational Resources Information Center

    Harnapp, Vern

    1978-01-01

    Explores the use of Landsat imagery in mapping and updating land use for the purpose of planning. Examines Gulf Coast Mexico as a case study, because modern agricultural techniques used to expand the ranching industry have significantly altered the landscape. (Author/BC)

  2. Gulf Coast from Corpus Christi to mouth of Mississippi river from Gemini 11

    NASA Image and Video Library

    1966-09-14

    S66-54559 (14 Sept. 1966) --- Gulf Coast from Corpus Christi, Texas, to mouth of Mississippi River, as seen from the Gemini-11 spacecraft during its 29th revolution of Earth. This photo was taken near sunrise. Photo credit: NASA

  3. Gulf Coast from from Atchafalaya Bay to Apalachicola seen from Gemini 11

    NASA Image and Video Library

    1966-09-14

    S66-54563 (14 Sept. 1966) --- View of the Gulf Coast area from Atchafalaya Bay to Apalachicola, including the mouth of the Mississippi River, Mobile Bay, New Orleans, Louisiana, and Pensacola, Florida, as seen from the Gemini-11 spacecraft during its 29th revolution of Earth. This photo was taken near sunrise. Photo credit: NASA

  4. Matagorda Bay, Gulf Coast of Texas as seen from the Apollo 7 spacecraft

    NASA Image and Video Library

    1968-10-15

    AS07-07-1800 (15 Oct. 1968) --- Matagorda Bay area on the Gulf Coast of Texas as seen from the Apollo 7 spacecraft during its 62nd revolution of Earth. Photographed from an altitude of 90 nautical miles, at ground elapsed time of 98 hours and 38 minutes.

  5. Recommendations for Ensuring Long-Term Engagement of Communities if Gulf Coast Ecosystem Restoration

    EPA Pesticide Factsheets

    This report contains advice and recommendations about how the Agency can best engage minority, low-income, and tribal/indigenous communities for input on decisions about Gulf Coast restoration plans, particularly with respect to the impacts of such plans on permitting (such as wetlands restoration, equitable development, revitalization, cleanups, and sustainable energy).

  6. Assessing the response of the Gulf Coast to global change

    NASA Astrophysics Data System (ADS)

    Anderson, John B.; Törnqvist, Torbjörn E.; Day, John

    2012-11-01

    Gulf Coastal Science Consortium Workshop;Houston, Texas, 28-29 June 2012 The newly formed Gulf Coastal Science Consortium held its first workshop at Rice University. The creation of the consortium was prompted by two recent incidents. One incident involved censorship of a book chapter on Galveston Bay by the Texas Commission on Environmental Quality that omitted all references to climate change and accelerated sea-level rise. The other incident was the adoption of legislation in North Carolina that requires planners and developers to assume a linear sea-level rise projection, despite compelling scientific evidence for a multifold increase in sea-level rise in historical time.

  7. Oil slicks off the coast of Qatar, Persian Gulf

    NASA Technical Reports Server (NTRS)

    1983-01-01

    A detailed view the port facility of Musay'id on the Qatar Peninsula, United Arab Emirates, Persian Gulf (25.0N, 52.5E). Part of a large oil spill seen as a dark toned mass in the water, covering much of the surface of the western Persian Gulf, has moved offshore in this scene. Qatar is one of several of the oil rich United Arab Emirate states. Oil spills and oil pollution of the environment commonly occur in oil tanker operations.

  8. Oil slicks off the coast of Qatar, Persian Gulf

    NASA Technical Reports Server (NTRS)

    1983-01-01

    A detailed view the port facility of Musay'id on the Qatar Peninsula, United Arab Emirates, Persian Gulf (25.0N, 52.5E). Part of a large oil spill seen as a dark toned mass in the water, covering much of the surface of the western Persian Gulf, has moved offshore in this scene. Qatar is one of several of the oil rich United Arab Emirate states. Oil spills and oil pollution of the environment commonly occur in oil tanker operations.

  9. The effect of Gulf Stream-induced baroclinicity on US East Coast winter cyclones

    SciTech Connect

    Cione, J.J.; Raman, S.; Pietrafesa, L.J. )

    1993-02-01

    Midlatitude cyclones develop off the Carolinas during winters and move north producing gale-force winds, ice, and heavy snow. It is believed that boundary-layer and air-sea interaction processes are very important during the development stages of these East Coast storms. The marine boundary layer (MBL) off the mid-Atlantic coastline is highly baroclinic due to the proximity of the Gulf Stream just offshore. Typical horizontal distances between the Wilmington coastline and the western edge of the Gulf Stream vary between 90 and 250 km annually, and this distance can deviate by over 30 km within a single week. While similar weekly Gulf Stream position standard deviations also exist at Cape Hatteras, the average annual distance to the Gulf Stream frontal zone is much smaller off Cape Hatteras, normally ranging between 30 and 100 km. This research investigates the low-level baroclinic conditions present prior to observed storm events. The examination of nine years of data on the Gulf Stream position and East Coast winter storms seems to indicate that the degree of low-level baroclinicity and modification existing prior to a cyclonic event may significantly affect the rate of cyclonic deepening off the mid-Atlantic coastline. Statistical analyses linking the observed surface-pressure decrease with both the Gulf Stream frontal location and the prestorm coastal baroclinic conditions are presented. These results quantitatively indicate that Gulf Stream-induced wintertime baroclinicity may significantly affect the regional intensification of East Coast winter cyclones. 20 refs., 9 figs., 1 tab.

  10. Partnerships to Deliver Bird Conservation along the Gulf Coast

    Treesearch

    Cecilia M. Riley; Greg Esslinger; Barry Wilson

    2005-01-01

    The Gulf of Mexico region contains much of the Western Hemisphere’s most important stopover habitat. Long an important region for industry and agriculture, the near-shore maritime and wetland habitats are now highly threatened by habitat degradation and rapid urbanization. Because of the value placed on coastal property, acquisition is not always a viable...

  11. Sustaining Productivity of Planted Forests in the Gulf Coast Region

    Treesearch

    James P. Bamett; Allan E. Tiarks; Mary Anne Sword

    2000-01-01

    The forests of the Gulf Coastal Region provide the basis for its economic well-being. Because of the semitropical climate, abundant rainfall and availing topography, the nation's richest plant communities thrive. These forests are predominately privately owned. Millions of private landowners are committed to managing their forests for a broad array of values which...

  12. Assessment of Undiscovered Gas Resources in the Upper Cretaceous Tuscaloosa and Woodbine Formations, Western Gulf Province of the Gulf Coast Region, Louisiana and Texas, 2007

    USGS Publications Warehouse

    ,

    2007-01-01

    Using a geology-based assessment methodology, the U.S. Geological Survey estimated a mean of 20.8 trillion cubic feet of undiscovered natural gas and a mean of 0.60 billion barrels of undiscovered natural gas liquids in the Western Gulf Province of the Gulf Coast Region, Louisiana and Texas.

  13. Hurricane frequency and landfall distribution for coastal wetlands of the Gulf coast, USA

    USGS Publications Warehouse

    Doyle, T.W.

    2009-01-01

    The regularity and severity of tropical storms are major determinants controlling ecosystem structure and succession for coastal ecosystems. Hurricane landfall rates vary greatly with high and low frequency for given coastal stretches of the southeastern United States. Site-specific meteorological data of hurricane wind speeds and direction, however, are only available for select populated cities of relatively sparse distribution and inland from the coast. A spatial simulation model of hurricane circulation, HURASIM, was applied to reconstruct chronologies of hurricane wind speeds and vectors for northern Gulf coast locations derived from historical tracking data of North Atlantic tropical storms dating back to 1851. Contrasts of storm frequencies showed that tropical storm incidence is nearly double for Florida coastal ecosystems than the westernmost stretches of Texas coastline. Finer-scale spatial simulations for the north-central Gulf coast exhibited sub-regional differences in storm strength and frequency with coastal position and latitude. The overall pattern of storm incidence in the Gulf basin indicates that the disturbance regime of coastal areas varies greatly along the coast, inland from the coast, and temporally over the period of record. Field and modeling studies of coastal ecosystems will benefit from this retrospective analysis of hurricane incidence and intensity both on a local or regional basis. ?? 2009 The Society of Wetland Scientists.

  14. Holocene aridity and storm phases, Gulf and Atlantic coasts, USA

    NASA Astrophysics Data System (ADS)

    Otvos, Ervin G.

    2005-05-01

    A bottomland flora that prevailed between ˜9900 and 6000 cal yr B.P. in a North Carolina stream valley may not reflect a regionally much wetter Atlantic climate, coeval with record drought in the Great Plains region and assumed dry Gulf coastal conditions. Such conditions were inferred for 6000 ± 1000 yr ago when the Bermuda High may have consistently occupied summer positions far to the NE. Arid episodes coeval with the Little River local wet interval are known from eolian sediments and pollen spectra in the Atlantic and the Gulf coastal plain. For multiple reasons, the regional extent, intensity, and duration of coastal aridity and alternating wet phases and the Bermuda High positions are not yet adequately constrained. The climate and edaphic causes for the steadily growing predominance of southern pines over hardwoods, achieved between ˜8900 and 4200 cal yr B.P. at different sites at different times are similarly still unresolved. New data from Shelby Lake, AL, reconfirms that no credible field or other proxy evidence exists for a previously postulated "catastrophic Gulf hurricane phase" in the late Holocene.

  15. Seasonal levels of the Vibrio predator bacteriovorax in atlantic, pacific, and gulf coast seawater.

    PubMed

    Richards, Gary P; Watson, Michael A; Boyd, E Fidelma; Burkhardt, William; Lau, Ronald; Uknalis, Joseph; Fay, Johnna P

    2013-01-01

    Bacteriovorax were quantified in US Atlantic, Gulf, and Pacific seawater to determine baseline levels of these predatory bacteria and possible seasonal fluctuations in levels. Surface seawater was analyzed monthly for 1 year from Kailua-Kona, Hawaii; the Gulf Coast of Alabama; and four sites along the Delaware Bay. Screening for Bacteriovorax was performed on lawns of V. parahaemolyticus host cells. Direct testing of 7.5 mL portions of seawater from the Atlantic, Pacific, and Gulf coasts gave mean annual counts ≤12.2 PFU. Spikes in counts were observed at 3 out of 4 sites along the Delaware Bay 1 week after Hurricane Sandy. A comparison of summer versus winter counts showed significantly more Bacteriovorax (P ≤ 0.0001) in the Delaware Bay during the summer and significantly more (P ≤ 0.0001) in the Gulf during the winter, but no significant seasonal differences (P > 0.05) for Hawaiian seawater. Bacteriovorax counts only correlated with seawater salinity and temperature at one Delaware site (r = 0.79 and r = 0.65, resp.). There was a relatively strong negative correlation between temperature and Bacteriovorax levels (r = -0.585) for Gulf seawater. Selected isolates were sequenced and identified by phylogenetic analysis as Bacteriovorax clusters IX, X, XI, and XII.

  16. Seasonal Levels of the Vibrio Predator Bacteriovorax in Atlantic, Pacific, and Gulf Coast Seawater

    PubMed Central

    Richards, Gary P.; Watson, Michael A.; Boyd, E. Fidelma; Burkhardt, William; Lau, Ronald; Uknalis, Joseph; Fay, Johnna P.

    2013-01-01

    Bacteriovorax were quantified in US Atlantic, Gulf, and Pacific seawater to determine baseline levels of these predatory bacteria and possible seasonal fluctuations in levels. Surface seawater was analyzed monthly for 1 year from Kailua-Kona, Hawaii; the Gulf Coast of Alabama; and four sites along the Delaware Bay. Screening for Bacteriovorax was performed on lawns of V. parahaemolyticus host cells. Direct testing of 7.5 mL portions of seawater from the Atlantic, Pacific, and Gulf coasts gave mean annual counts ≤12.2 PFU. Spikes in counts were observed at 3 out of 4 sites along the Delaware Bay 1 week after Hurricane Sandy. A comparison of summer versus winter counts showed significantly more Bacteriovorax (P ≤ 0.0001) in the Delaware Bay during the summer and significantly more (P ≤ 0.0001) in the Gulf during the winter, but no significant seasonal differences (P > 0.05) for Hawaiian seawater. Bacteriovorax counts only correlated with seawater salinity and temperature at one Delaware site (r = 0.79 and r = 0.65, resp.). There was a relatively strong negative correlation between temperature and Bacteriovorax levels (r = −0.585) for Gulf seawater. Selected isolates were sequenced and identified by phylogenetic analysis as Bacteriovorax clusters IX, X, XI, and XII. PMID:24454382

  17. Gulf Coast Water Port Facilities Study. Appendix A. Western Gulf Hydrobiological Zones.

    DTIC Science & Technology

    1973-04-01

    urban concentration , and continuing coastal land development. Because the zone is buffeted by floods and hurricane impact damage, and modified by...encompasses shallow coastal lagoons . bays. and salt flats that are separated from the Gulf of Mexico by that major link in the chain of barrier islands...1) Physiographic. - The Laguna Madre of Texas is a series of coastal lagoons , consisting of a long, narrow outer lagoon separated from the Gulf of

  18. Houston, Texas and Gulf Coast area as seen from the Apollo 7 spacecraft

    NASA Technical Reports Server (NTRS)

    1968-01-01

    The Houston, Texas and Gulf Coast area, looking southeast, as seen from the Apollo 7 spacecraft during its 91st revolution of the earth. Photographed from an altitude of 101 nautical miles, at ground elapsed time of 144 hours and 26 minutes. The morning sun causes a reflection on the water surfaces such as the Gulf of Mexico, Galveston Bay, Buffalo Bayou and the Brazos River and causes a unique reflection in the canals and fields west of Alvin. Some of the landmarks visible in this picture include highways and freeways, the Astrodome, the Intercontinental Airport and the Manned Spacecraft Center.

  19. Hurricane Wave Power Extremes Along the U.S. Atlantic and Gulf Coasts

    NASA Astrophysics Data System (ADS)

    Bromirski, P. D.; Kossin, J. P.

    2007-12-01

    Extremes in wave power generated by tropical cyclones (TCs) will have an increasingly greater coastal impact as mean sea level rises. The Gulf 98th percentile (3 m) deep-water significant wave height, HS, measured at four open ocean NOAA buoys along the U.S. Atlantic coast and three Gulf buoys identifies extreme TC-generated wave events during the June-November hurricane season. Since 1978, there were substantially more significant HS events along the Atlantic coast than in the Gulf, with almost three times as many extreme wave events during September. The monthly distribution along both coasts peaks in September, with an equally likely chance of a significant TC wave event occurring during October as during August over the 1978-2006 data record. However, no clear trend in TC-generated extreme wave heights is observed. In general, the Atlantic buoys show a significant increase in seasonal wave power, PW, since 1995. PW during six of the hurricane seasons since 1995 exceeds all prior years at at least one of the Atlantic group buoys. In contrast to the Atlantic buoys, the Gulf buoys show exceptional seasonal PW levels only during the 2005 hurricane season when major Hurricanes Dennis, Emily, Katrina, Rita, and Wilma tracked trough the Gulf. The exceptional PW levels observed in the Gulf during 2005 were exceeded in the Atlantic during 1999, and approached during 1995 and 1996, attesting to a greater frequency of extreme TC-associated extreme wave events along the East Coast compared to the Gulf during the last four decades. A TC wave power index (WPI) increases significantly in the Atlantic during the mid-1990s, resulting largely from an increase in mid-to-late hurricane season TCs. The WPI is related to TC strength, size, duration, and frequency, and is highly correlated with the TC power dissipation index (PDI, Emanuel 2005). The close association of the WPI to hurricane activity implies that significant coastal impacts will increase as the PDI increases

  20. Climatology of Transport and Diffusion Conditions along the United States Atlantic and Gulf Coasts.

    NASA Astrophysics Data System (ADS)

    Raynor, Gilbert S.; Hayes, Janet V.

    1981-08-01

    A study of the atmospheric transport and diffusion climatology of the United States east and Gulf coasts was conducted to aid in planning and site selection for potentially polluting installations. This paper presents selected results from an extensive statistical study. Regular hourly observational data were obtained from 30 coastal stations from Maine to Texas and analyzed in terms of conditions important to emission transport and diffusion. The 30 stations included four pairs with one of each pair at a greater distance from the coast than the other but near the same latitude.For each station, wind directions were classified into eight groups with reference to orientation of the local coastline. For some studies, fewer classes were desirable and these were combined into three groups-onshore, alongshore and offshore. Wind speeds were divided into four classes. A stability class for each observation was computed by a modified Pasquill method. This gave eight classes which were combined into three-unstable, neutral and stable-for some studies. Diffusion ratings ranging from very good to very poor were derived from combinations of wind speed and stability classes. Finally, the joint frequency distributions of wind direction and diffusion rating were calculated for each station. Data were then classified by season, time of day, wind direction, wind speed, stability class and combinations of these variables, and the percent of hours in each subgroup determined.Onshore winds were least frequent along the New England and Mid-Atlantic coasts except from Cape Cod to New York City and along the west coast of Florida. Onshore winds were most frequent along the east coast of Florida and the Texas coast. Poor diffusion conditions occurred most frequently from the Carolinas to the Florida east coast and along the northern Gulf Coast. At all stations, diffusion conditions were better during the day than at night. Among the paired stations, the more inland had a greater frequency

  1. Giant oil fields of the Gulf Coast area

    SciTech Connect

    Haeberle, F.R.

    1993-09-01

    The 134 giant fields in the Gulf Coastal area contain 29% of the total giant-field reserves. Cumulative production is 32% of the giant-field cumulative total and 20% of the United States cumulative production. Eighty-nine of the giant fields are offshore with 22% of the reserves, 11 fields are in east Texas with 24% of the reserves, and 1 field is in Florida with 1% of the reserves. In 106 of the giant fields the primary producing interval is Cenozoic with 65% of the reserves, and in 28 giant fields the producing interval is Mesozoic with 35% of the reserves. The primary producing interval is Mesozoic with 35% of the reserves. The primary producing interval in 124 giant fields consists of clastics with 91% of the reserves, in 7 fields the primary lithology is carbonates with 6% of the reserves, and in 3 giant fields the lithology is mixed clastics and carbonates. A total of 127 fields are in structural traps with all of the reserves, 4 fields are stratigraphic traps (3%) with 18% of the reserves, and 3 fields are combination traps with 1% of the reserves. Over 50 of the giant oil fields in structural traps are salt domes. The most prevalent types of giant fields in the Gulf Coastal area are onshore structural traps with Cenozoic clastics as the primary producing intervals.

  2. Oil and Water Don't Mix: The Gulf Coast Oil Disaster as a Preschool Social Studies Lesson

    ERIC Educational Resources Information Center

    Kruse, Tricia

    2010-01-01

    On April 20, 2010, an offshore oil-drilling platform exploded, spilling millions of gallons of oil into the gulf. From Louisiana to the Gulf Coast of Florida the effects are being felt by fisherman, shrimpers, dive charters, and other hardworking folks who depend on the water for their livelihood. But there is another population in these coastal…

  3. Oil and Water Don't Mix: The Gulf Coast Oil Disaster as a Preschool Social Studies Lesson

    ERIC Educational Resources Information Center

    Kruse, Tricia

    2010-01-01

    On April 20, 2010, an offshore oil-drilling platform exploded, spilling millions of gallons of oil into the gulf. From Louisiana to the Gulf Coast of Florida the effects are being felt by fisherman, shrimpers, dive charters, and other hardworking folks who depend on the water for their livelihood. But there is another population in these coastal…

  4. View of Gulf coast area of Louisiana from Skylab space station

    NASA Technical Reports Server (NTRS)

    1974-01-01

    A vertical view of the Gulf coast area of Louisiana (29.0N, 92.0W) as seen from the Skylab space station in Earth orbit. A Skylab 4 crewman used a hand-held 70mm Hasselblad camera to take this picture. This view extends from White Lake and Pecan Island (bottom border) eastward to the Mississippi River delta (top left). Atchafalaya Bay (red) is in the center. The Bayou Teche area is included in this view. A prominent feature of this photograph is two large white smoke plumes extending from Louisiana south into the Gulf of Mexico. The larger smoke plume originates on the southern shore of Vermillion Bay. The other plume extends from the southern shore of Marsh Island. The prononced narrow width and length of the plumes indicate that a strong offshore wind is present. Approximately 100 miles of the plumes are visible in this photograph; but they probably extend well into the Gulf of Mexico.

  5. Distribution and movement of suspended sediment in the Gulf of Mexico off the Texas coast

    NASA Technical Reports Server (NTRS)

    Hunter, R. E.

    1973-01-01

    ERTS-1 imagery has proven very useful in studies of the distribution of suspended sediment in the Gulf of Mexico off the Texas coast. Moreover, by using suspended matter concentrations as tags on water masses, much information on water movement can be obtained. The utility of suspended sediment as a tracer is dependent on the sediment remaining in suspension long enough to travel an appreciable distance or to be visible on successive images. Although the evidence is not conclusive, it seems likely that much of the suspended sediment in Gulf of Mexico nearshore waters during normal seastate conditions has remained in suspension since the time of its entry into the Gulf of Mexico through rivers and tidal inlets.

  6. View of Gulf coast area of Louisiana from Skylab space station

    NASA Technical Reports Server (NTRS)

    1974-01-01

    A vertical view of the Gulf coast area of Louisiana (29.0N, 92.0W) as seen from the Skylab space station in Earth orbit. A Skylab 4 crewman used a hand-held 70mm Hasselblad camera to take this picture. This view extends from White Lake and Pecan Island (bottom border) eastward to the Mississippi River delta (top left). Atchafalaya Bay (red) is in the center. The Bayou Teche area is included in this view. A prominent feature of this photograph is two large white smoke plumes extending from Louisiana south into the Gulf of Mexico. The larger smoke plume originates on the southern shore of Vermillion Bay. The other plume extends from the southern shore of Marsh Island. The prononced narrow width and length of the plumes indicate that a strong offshore wind is present. Approximately 100 miles of the plumes are visible in this photograph; but they probably extend well into the Gulf of Mexico.

  7. Oil production, agriculture, and groundwater quality in the southeastern Gulf Coast Aquifer, Texas.

    PubMed

    Hudak, P F; Wachal, D J

    2001-12-01

    Associations between groundwater quality and land use were evaluated in the southeastern Gulf Coast Aquifer, Texas. Data from 19234 oil/gas wells and 256 water wells were mapped with a geographic information system (GIS) and statistically analyzed. Water wells near oil/gas wells had significantly higher levels of chloride, bromide, and total dissolved solids (TDS). Bromide-chloride ratios were also higher at water wells near oil/gas wells. Shallower water wells had significantly higher chloride, bromide, TDS, and nitrate concentrations. Nitrate concentrations were higher beneath cropland compared to other land uses. Results of this study suggest that oil/gas production and agriculture have impacted water quality in the Gulf Coast Aquifer.

  8. Preliminary Gulf Coast Coalbed Methane Exploration Maps: Depth to Wilcox, Apparent Wilcox Thickness and Vitrinite Reflectance

    USGS Publications Warehouse

    Barker, Charles E.; Biewick, Laura R.; Warwick, Peter D.; SanFilipo, John R.

    2000-01-01

    Strong economic controls on the viability of coalbed methane (CBM) prospects make coal geometry and coal property maps key elements in identifying sweet spots and production fairways. Therefore, this study seeks to identify the apparent prospective areas for CBM exploration in the Wilcox Group (Paleocene-Eocene) lignite and coalbeds by mapping net coal thickness, depth to coal, and coal rank (vitrinite reflectance). Economic factors are not considered in this CBM prospects study. Given the comparatively extensive gas pipeline and other production infrastructure development in the Gulf Coast Region, these factors seem less a control compared to other areas. However, open leasable public lands are minimal or nonexistent in the Gulf Coast region and access to the CBM prospects could be a problem.

  9. A Coastal Hazards Data Base for the U.S. Gulf Coast (1993) (NDP-043b)

    DOE Data Explorer

    Gornitz, V. M.; White, T. W.

    2008-01-01

    This document describes the contents of a digital data base that may be used to identify coastlines along the U.S. Gulf Coast at risk to sea-level rise. The data base integrates point, line, and polygon data for the U.S. Gulf Coast into 0.25° latitude by 0.25° longitude grid cells and into 1:2,000,000 digitized line segments that can be used by raster or vector geographic information systems (GIS) as well as by non-GIS data base systems. Each coastal grid cell and line segment contains data on elevations, geology, geomorphology, sea-level trends, shoreline displacement (erosion/accretion), tidal ranges, and wave heights.

  10. The Gulf Coast Vulnerability Assessment: Mangrove, Tidal Emergent Marsh, Barrier Islands, and Oyster Reef

    USGS Publications Warehouse

    Watson, Amanda; Reece, Joshua S.; Tirpak, Blair; Edwards, Cynthia Kallio; Geselbracht, Laura; Woodrey, Mark; LaPeyre, Megan K.; Dalyander, P. Soupy

    2015-01-01

    Climate, sea level rise, and urbanization are undergoing unprecedented levels of combined change and are expected to have large effects on natural resources—particularly along the Gulf of Mexico coastline (Gulf Coast). Management decisions to address these effects (i.e., adaptation) require an understanding of the relative vulnerability of various resources to these stressors. To meet this need, the four Landscape Conservation Cooperatives along the Gulf partnered with the Gulf of Mexico Alliance to conduct this Gulf Coast Vulnerability Assessment (GCVA). Vulnerability in this context incorporates the aspects of exposure and sensitivity to threats, coupled with the adaptive capacity to mitigate those threats. Potential impact and adaptive capacity reflect natural history features of target species and ecosystems. The GCVA used an expert opinion approach to qualitatively assess the vulnerability of four ecosystems: mangrove, oyster reef, tidal emergent marsh, and barrier islands, and a suite of wildlife species that depend on them. More than 50 individuals participated in the completion of the GCVA, facilitated via Ecosystem and Species Expert Teams. Of the species assessed, Kemp’s ridley sea turtle was identified as the most vulnerable species across the Gulf Coast. Experts identified the main threats as loss of nesting habitat to sea level rise, erosion, and urbanization. Kemp’s ridley also had an overall low adaptive capacity score due to their low genetic diversity, and higher nest site fidelity as compared to other assessed species. Tidal emergent marsh was the most vulnerable ecosystem, due in part to sea level rise and erosion. In general, avian species were more vulnerable than fish because of nesting habitat loss to sea level rise, erosion, and potential increases in storm surge. Assessors commonly indicated a lack of information regarding impacts due to projected changes in the disturbance regime, biotic interactions, and synergistic effects in both

  11. Gulf Coast vulnerability assessment: Mangrove, tidal emergent marsh, barrier islands and oyster reef

    USGS Publications Warehouse

    Watson, Amanda; Reece, Joshua; Tirpak, Blair; Edwards, Cynthia Kallio; Geselbracht, Laura; Woodrey, Mark; LaPeyre, Megan K.; Dalyander, Patricia (Soupy)

    2017-01-01

    Climate, sea level rise, and urbanization are undergoing unprecedented levels of combined change and are expected to have large effects on natural resources—particularly along the Gulf of Mexico coastline (Gulf Coast). Management decisions to address these effects (i.e., adaptation) require an understanding of the relative vulnerability of various resources to these stressors. To meet this need, the four Landscape Conservation Cooperatives along the Gulf partnered with the Gulf of Mexico Alliance to conduct this Gulf Coast Vulnerability Assessment (GCVA). Vulnerability in this context incorporates exposure and sensitivity to threats (potential impact), coupled with the adaptive capacity to mitigate those threats. Potential impact and adaptive capacity reflect natural history features of target species and ecosystems. The GCVA used an expert opinion approach to qualitatively assess the vulnerability of four ecosystems: mangrove, oyster reef, tidal emergent marsh, and barrier islands, and a suite of wildlife species that depend on them. More than 50 individuals participated in the completion of the GCVA, facilitated via Ecosystem and Species Expert Teams. Of the species assessed, Kemp’s ridley sea turtle was identified as the most vulnerable species across the Gulf Coast. Experts identified the main threats as loss of nesting habitat to sea level rise, erosion, and urbanization. Kemp’s ridley also had an overall low adaptive capacity score due to their low genetic diversity, and higher nest site fidelity as compared to other assessed species. Tidal emergent marsh was the most vulnerable ecosystem, due in part to sea level rise and erosion. In general, avian species were more vulnerable than fish because of nesting habitat loss to sea level rise, erosion, and potential increases in storm surge. Assessors commonly indicated a lack of information regarding impacts due to projected changes in the disturbance regime, biotic interactions, and synergistic effects in

  12. Economic vulnerability to sea-level rise along the northern U.S. Gulf Coast

    USGS Publications Warehouse

    Thatcher, Cindy A.; Brock, John C.; Pendleton, Elizabeth A.

    2013-01-01

    The northern Gulf of Mexico coast of the United States has been identified as highly vulnerable to sea-level rise, based on a combination of physical and societal factors. Vulnerability of human populations and infrastructure to projected increases in sea level is a critical area of uncertainty for communities in the extremely low-lying and flat northern gulf coastal zone. A rapidly growing population along some parts of the northern Gulf of Mexico coastline is further increasing the potential societal and economic impacts of projected sea-level rise in the region, where observed relative rise rates range from 0.75 to 9.95 mm per year on the Gulf coasts of Texas, Louisiana, Mississippi, Alabama, and Florida. A 1-m elevation threshold was chosen as an inclusive designation of the coastal zone vulnerable to relative sea-level rise, because of uncertainty associated with sea-level rise projections. This study applies a Coastal Economic Vulnerability Index (CEVI) to the northern Gulf of Mexico region, which includes both physical and economic factors that contribute to societal risk of impacts from rising sea level. The economic variables incorporated in the CEVI include human population, urban land cover, economic value of key types of infrastructure, and residential and commercial building values. The variables are standardized and combined to produce a quantitative index value for each 1-km coastal segment, highlighting areas where human populations and the built environment are most at risk. This information can be used by coastal managers as they allocate limited resources for ecosystem restoration, beach nourishment, and coastal-protection infrastructure. The study indicates a large amount of variability in index values along the northern Gulf of Mexico coastline, and highlights areas where long-term planning to enhance resiliency is particularly needed.

  13. Habitat suitability index models: northern pintail (Gulf Coast wintering). [Anas acuta

    SciTech Connect

    Howard, R.J.; Kantrud, H.A.

    1986-07-01

    A review and synthesis of existing information were used to develop a model for evaluatin wintering habitat quality for northern pintail (Anas acuta) along the Gulf of Mexico coast. The model is scaled to produce an index between 0 (unsuitable habitat) and 1.0 (optimal habitat). Habitat suitability index models are designed for use with the Habitat Evaluation Procedures previously developed by the US Fish and Wildlife Service. Guidelines for model application and techniques for measuring model variables are provided.

  14. The Evolving Medical and Veterinary Importance of the Gulf Coast tick (Acari: Ixodidae).

    PubMed

    Paddock, Christopher D; Goddard, Jerome

    2015-03-01

    Amblyomma maculatum Koch (the Gulf Coast tick) is a three-host, ixodid tick that is distributed throughout much of the southeastern and south-central United States, as well as several countries throughout Central and South America. A considerable amount of scientific literature followed the original description of A. maculatum in 1844; nonetheless, the Gulf Coast tick was not recognized as a vector of any known pathogen of animals or humans for >150 years. It is now identified as the principal vector of Hepatozoon americanum, the agent responsible for American canine hepatozoonosis, and Rickettsia parkeri, the cause of an emerging, eschar-associated spotted fever group rickettsiosis identified throughout much of the Western Hemisphere. Coincident with these discoveries has been recognition that the geographical distribution of A. maculatum in the United States is far more extensive than described 70 yr ago, supporting the idea that range and abundance of certain tick species, particularly those with diverse host preferences, are not fixed in time or space, and may change over relatively short intervals. Renewed interest in the Gulf Coast tick reinforces the notion that the perceived importance of a particular tick species to human or animal health can be relatively fluid, and may shift dramatically with changes in the distribution and abundance of the arthropod, its vertebrate hosts, or the microbial agents that transit among these organisms.

  15. Hurricanes and the U.S. Gulf Coast: Science and Sustainable Rebuilding

    NASA Astrophysics Data System (ADS)

    2006-06-01

    The knowledge available among AGU members provides scientific expertise on nearly all of the physical environment of the dynamic Gulf Coast ecosystem complex. Intelligently rebuilding features such as fisheries, oil fields, seaports, farms, and wetlands after hurricanes Katrina and Rita will require ``a well-constructed collaborative effort to maximize the role of science in decisions made about the rebuilding,'' wrote Charles Groat, former director of the U.S. Geological Survey, in a news article published in Eos that simulated an AGU meeting of experts. As a step toward developing a scientific basis for safer communities along the Florida-Alabama-Mississippi-Louisiana-Texas coastline, AGU convened an interdisciplinary `Conference of Experts' on 11-12 January 2006 to discuss what we, as Earth and space scientists, know about the present and projected environment in New Orleans and the Gulf Coast areas affected by the hurricanes of 2005. Twenty scientists, all experts in the fields of science relevant to the Gulf Coast, met to consider ideas for a coordinated effort to integrate science into the decision-making processes necessary for the area's sustainable rebirth. Political, economic, and social issues were intentionally not discussed. Nevertheless, it was recognized that these issues are intertwined with science and are of paramount importance. This report contains a summary of the discussion and is intended to be helpful in providing scientific understanding useful in redevelopment of the affected area.

  16. Barrier backbeach shell assemblages from the central Texas Gulf Coast

    SciTech Connect

    Albertzart, L.S.; Wilkinson, B.H. )

    1990-08-01

    Lateral variation in the abundance, taxonomic composition and amount of abrasion of approximately 14,000 mollusc shells, from 135 km of backbeach along Matagorda Island and Matagorda Peninsula of the central Texas coast, primarily reflect long-term patterns of shoreline progradation and recession. Disarticulated shell is concentrated as a gravel lag during landward transport of barrier island/peninsula sediment from storm washover and during lateral transport by fairweather longshore currents. Taxonomic dominance within any backbeach area directly relates to long-term Holocene patterns of shoreline migration. Shell along progradational Matagorda Island is largely derived from gulfward shoreface communities and valves of normal marine species are predominant. Shell along recessive beaches of Matagorda Peninsula, on the other hand, is primarily derived from the erosion of older bay-estuarine facies now exposed to shoreface currents, and values of brackish lagoonal species are predominant. Degree of valve abrasion reflects both the residence time of shell in shoreface settings and occurrence of shell with coarse, poorly sorted sediment. Central Texas coast backbeach molluscan death assemblages largely reflect a time-averaged census of both living communities and older shell assemblages that are sampled over an along-shore length of several kilometers and over a shore-to-basin distance of several hundred meters. These assemblages, accumulated over a time span of several thousand years, reflect the spatial and the temporal proximity of specific sedimentary environments to sites of sediment accumulation. Backbeach shell assemblages record both the ecologic preference of individual taxonomic groups to specific environmental parameters as well as the dominant processes of sediment transport in littoral depositional systems.

  17. Gulf Coast Resilience Coalition: An Evolved Collaborative Built on Shared Disaster Experiences, Response, and Future Preparedness.

    PubMed

    Hansel, Tonya Cross; Osofsky, Howard J; Langhinrichsen-Rohling, Jennifer; Speier, Anthony; Rehner, Tim; Osofsky, Joy D; Rohrer, Glenn

    2015-12-01

    For close to a decade, the Gulf Coast of the United States has been in almost constant disaster recovery mode, and a number of lessons have been learned concerning disaster recovery and behavioral health. The purpose of this report was to describe the natural development of a Gulf Coast Resilience Coalition (GCRC). The GCRC methods began with state-specific recovery goals following Hurricane Katrina in 2005 and transitioned to a shared multistate and multidiscipline coalition. The coalition's effectiveness is demonstrated through continuation, procurement of funding to provide response services, and increased membership to ensure sustainability. The coalition has enhanced response, recovery, and resilience by providing strategic plans for dissemination of knowledge; post-disaster surveillance and services; effective relationships and communication with local, state, and regional partners; disaster response informed by past experience; a network of professionals and community residents; and the ability to improve access to and efficiency of future behavioral health coordination through an organized response. The GCRC can not only improve readiness and response, but work toward a shared vision of improved overall mental and behavioral health and thus resilience, with beneficial implications for the Gulf South and other communities as well.

  18. Hydrology of the Texas Gulf Coast aquifer systems

    USGS Publications Warehouse

    Ryder, Paul D.; Ardis, Ann F.

    1991-01-01

    A complex, multilayered ground-water flow system exists in the Coastal Plain sediments of Texas. The Tertiary and Quaternary clastic deposits have an areal extent of 114,000 square miles onshore and in the Gulf of Mexico. Two distinct aquifer systems are recognized within the sediments, which range in thickness from a few feet to more than 12,000 feet The older system--the Texas coastal uplands aquifer system-consists of four aquifers and two confining units in the Claiborne and Wilcox Groups. It is underlain by the practically impermeable Midway confining unit or by the top of the geopressured zone. It is overlain by the nearly impermeable Vicksburg-Jackson confining unit, which separates it from the younger coastal lowlands aquifer system. The coastal lowlands aquifer system consists of five permeable zones and two confining units that range in age from Oligocene to Holocene. The hydrogeologic units of both systems are exposed in bands that parallel the coastline. The units dip and thicken toward the Gulf. Quality of water in the aquifer systems is highly variable, with dissolved solids ranging from less than 500 to 150,000 milligrams per liter.Substantial withdrawal from the aquifer systems began in the early 1900's and increased nearly continuously into the 1970's. The increase in withdrawal was relatively rapid from about 1940 to 1970. Adverse hydrologic effects, such as saltwater encroachment in coastal areas, land-surface subsidence in the Houston-Galveston area, and long-term dewatering in the Whiter Garden area, were among some of the factors that caused pumping increases to slow or to cease in the 1970's and 1980's.Ground-water withdrawals in the study area in 1980 were about 1.7 billion gallons per day. Nearly all of the withdrawal was from four units: Permeable zones A, B, and C of Miocene age and younger, and the lower Claiborae-upper Wilcox aquifer. Ground-water levels have declined hundreds of feet in the intensively pumped areas of Houston

  19. Phytoplankton variability in relation to some environmental factors in the eastern coast of Suez Gulf, Egypt.

    PubMed

    Nassar, Mohamed Z; El-Din, Nihal G Shams; Gharib, Samiha M

    2015-10-01

    Water samples were seasonally collected from 12 stations of the eastern coast of Suez Gulf during autumn of 2012 and winter, spring, and summer of 2013 in order to investigate phytoplankton community structure in relation to some physicochemical parameters. The study area harbored a diversified phytoplankton community (138 species), belonging to 67 genera. Four algal groups were represented and classified as Bacillariophyceae (90 species), Dinophyceae (28 species), Cyanophyceae (16 species), and Chlorophyceae (4 species). The results indicated a relative high occurrence of some species namely.; Pleurotaenium trabecula of green algae; Chaetoceros lorenzianus, Proboscia alata var. gracillima, Pseudosolenia calcar-avis, and Pseudo-nitzschia pungens of diatoms; Trichodesmium erythraeum and Pseudoanabaena limnetica of cyanophytes. Most of other algal species were fairly distributed at the selected stations of the study area. The total abundance of phytoplankton was relatively low (average of 2989 unit/L) in the eastern coast of Suez Gulf, as compared its western coast and the northern part of the Red Sea. The diversity of phytoplankton species was relatively high (2.35-3.82 nats) with an annual average of 3.22 nats in the present study. The results concluded that most of eastern coast of Suez Gulf is still healthy, relatively unpolluted, and oligotrophic area, which is clearly achieved by the low values of dissolved phosphate (0.025-0.3 μM), nitrate (0.18-1.26 μM), and dissolved ammonium (0.81-5.36 μM). Even if the occurrence of potentially harmful algae species was low, the study area should be monitored continuously. The dissolved oxygen ranged between 1.77 and 8.41 mg/L and pH values between 7.6 and 8.41. The multiple regression analysis showed that the dissolved nitrate and pH values were the most effective factors that controlled the seasonal fluctuations of phytoplankton along the eastern coast of Suez Gulf during 2012-2013.

  20. Migratory bird pathways and the Gulf of Mexico: Importance of Louisiana's coast

    USGS Publications Warehouse

    Smith, Gregory J.; Barrow, Wylie

    2005-01-01

    Because of its geographic position, Louisiana plays an important role in the hemispheric-scale phenomenon known as the Nearctic-Neotropical bird migration system. Each year millions of landbirds migrate across or near to the coast of the Gulf of Mexico. Birds migrate in large, broad fronts that sometimes exceed 2 million individuals, and there is an advantage for them to take a direct north-south route (the shortest distance).During migration seasons, nearly all of the migratory landbird species of the eastern United States, as well as many western species, use the coastal plains of the western gulf.Spring migrants arrive with depleted energy reserves and depend on Louisiana's coastal habitats to provide food and cover after long gulf crossings.Fall migrants depend on Louisiana’s coastal habitats for food to store fat reserves just prior to gulf crossings in autumn.Mortality during the migratory period can be high. Recent research on the black-throated blue warbler (Dendroica caerulescens) indicates that more than 85% of the annual mortality for the species occurs during migration.Migrants en route tend to concentrate in habitats adjacent to ecological barriers; DOI land managers need to identify key coastal landscape features that are important to these birds.Because of the vastness of the North American continent, it is nearly impossible to delineate movement patterns and migration pathways by using traditional ground-based surveys.

  1. Vicksburg Group carbonates: a look at Gulf Coast Paleogene carbonate banks

    SciTech Connect

    Coleman, J.L. Jr.

    1983-09-01

    Throughout the Paleogene of the northern Gulf coastal plain large deltaic systems dumped thick sequences of lithoclastic sediments onto the shelf of the Gulf of Mexico. In between major deltaic pulses, thick carbonate banks or reefs developed in the vicinity of the broad Wiggins uplift of southern Mississippi and Alabama. Because the present-day out-crop of the Oligocene Vicksburg Group in Mississippi and Alabama cuts across sedimentary strike, all of the component lithofacies of a typical Paleogene carbonate bank complex of the northern Gulf coastal plain are exposed. By relating outcrop lithology to electric log character, the various lithofacies of the Vicksburg Group can be mapped throughout its subsurface extent. Similar inferences and maps can be made for the other Paleogene carbonate complexes. All of these environments, with their slightly different faunal constituents, can be found in the other carbonate units of the Gulf Coast Paleogene. The Tatum and the Salt Mountain Limestones have coral-algal community shelf margins, whereas the Cook Mountain, Ocala, and Vicksburg have a slightly deeper water foraminiferal-algal community at the margin. Time-equivalent lithoclastic deposition to the west prevented westward expansion much beyond central Louisiana. During the Miocene, bank complex communities were displaced farther to the east by continued Rocky Mountain-derived sediments coupled with a major epeirogenic uplift of the southern Appalachians.

  2. PCB concentrations in sediments from the Gulf of Nicoya estuary, Pacific coast of Costa Rica.

    PubMed

    Spongberg, Alison L

    2004-12-01

    Thirty-one sediment samples collected from 1996-2003 from the Gulf of Nicoya estuary on the northwestern coast of Costa Rica, have been obtained for PCB analyses. This is part of the first study to evaluate the PCB contamination in coastal Costa Rica. Overall, the concentrations are low, especially when compared to sediments from more temperate climates and/or sediments from more heavily industrialized areas. Values average less than 3 ng/g dw sediment, however, a few samples contained up to 7 ng/g dw sediment. Sediments with the highest concentrations were located in the Punta Morales area, where muds were sampled from among mangrove roots. The Puntarenas samples had surprisingly low PCB concentrations, likely due to their sandy lithology. The congener distribution within the majority of the samples showed signs of either recent sources or lack of degradation. However, a few sites, specifically some of the inter-gulf islands and more remote samples had congener distributions indicative of airborne contaminants and/or degradation. Considering the presence of airborne PCBs in the Gulf of Papagayo to the north, the lack of airborne PCBs and more varied congener distribution in the Gulf of Nicoya estuary was surprising.

  3. Evaluation of oil tanker routing per section 4111(b)(7) Oil Pollution Act of 1990. Part 2. Atlantic and Florida Gulf coasts. Final report

    SciTech Connect

    1996-08-01

    The purpose of this study is to evaluate oil tanker routing along the east coast and Florida Gulf Coast. It discusses whether areas of navigable waters and the Exclusive Economic Zone should be restricted to oil tankers.

  4. Houston, Texas and Gulf Coast area as seen from the Apollo 7 spacecraft

    NASA Image and Video Library

    1968-10-15

    AS07-07-1872 (11-22 Oct. 1968) --- The Houston, Texas, and Gulf Coast area, looking southeast, as seen from the Apollo 7 spacecraft at an altitude of 101 nautical miles. This photograph was made during the spacecraft's 91st revolution of Earth, at ground elapsed time of 144 hours and 26 minutes. The morning sun causes a spectacular reflection on water surfaces such as the Gulf of Mexico, Galveston Bay, Buffalo Bayou, and the Brazos River, and causes a unique reflection in the canals and rice fields west of Alvin. Some of the landmarks visible in this picture include highways and freeways, the Astrodome, the new Intercontinental Airport, and the Manned Spacecraft Center.

  5. Gulf Coast Deep Water Port Facilities study. Appendix B. North Central Gulf Hydrobiological Zones.

    DTIC Science & Technology

    1973-04-01

    alga flora of the Mississippi coast. Previous knowledge of the algal flora was limited primarily to the work of Taylor (1954). Eleuterius (1972...Rhodophyta, 7 of Chlorophyta, 5 of Phaeophyta, and 4 of Cyanophyta. In comparing the algal flora of the Chandeleur Islands to previous collections in...Changes in the Mississippi Sound," J. Mississippi A cad. Sci., 12. 1966. pp. 418-419. Mullahy, J.H., "Preliminary Survey of the Algal Flora of the Chandeleur

  6. Paleoecologic and biostratigraphic models for pleistocene through miocene foraminiferal assemblages of the Gulf Coast Basin

    SciTech Connect

    Breard, S.Q.; Callender, A.D.; Nault, M.J. )

    1993-09-01

    We have developed operationally oriented paleoecologic models used in hydrocarbon exploration of the Gulf Coast basin for Pleistocene through Miocene foraminifera and an updated, refined biostratigraphic chart. We also present estimated paleoecologic tolerances for major benthic and planktic foraminiferal markers, and discuss a number of rules and problems encountered in oil industry paleoenvironmental reconstruction. Key benthic paleoenvironmental markers for particular depth zones are graphically presented for the Pleistocene through Miocene. Improvements over previous models include greater use of calcareous and arenaceous foraminiferal species not used or recognized in earlier studies. Finer subdivisions of bathyal paleoenvironments are of particular significance due to current Gulf of Mexico deep-water exploration. Operationally, the abyssal environmental is difficult to recognize due to a reliance of faunal abundance to delineate abyssal from bathyal and the lack of abyssal zone markers. A number of genera and species are identified as having changed habitat preference through time. Some forms have moved progressively into deeper water (Ceratobulimina Cyclammina cancellata and Nonion pompiloides). Conversely, the movement of species into progressively shallower occurrences through time (Pullenia bullodies) appears to be less common. The widespread occurrence of known Gulf of Mexico foraminiferal species from countries such as Mexico, Venezuela, Ecuador, Jamaica, Trinidad, and the Dominican Republic, suggest that these; models have direct application to Neogene studies in Central America, South America, the Caribbean, and the U.S. Gulf Coast. We introduce a variety of deep-water benthic marker foraminifera, many for the first time. These taxa help fill gaps for deeper-water sections where standard benthic marker foraminifera do not occur, helping debunk the popular myth that benthic foraminifera are useless as markers in the exploration of deep-water sections.

  7. Estimating tsunami inundation from hurricane storm surge predictions along the U.S. gulf coast

    NASA Astrophysics Data System (ADS)

    Pampell-Manis, Alyssa; Horrillo, Juan; Figlus, Jens

    2016-08-01

    Gulf of Mexico (GOM) coasts have been included in the U.S. Tsunami Warning System since 2005. While the tsunami risk for the GOM is low, tsunamis generated by local submarine landslides pose the greatest potential threat, as evidenced by several large ancient submarine mass failures identified in the northern GOM basin. Given the lack of significant historical tsunami evidence in the GOM, the potential threat of landslide tsunamis in this region is assessed from a worst-case scenario perspective based on a set of events including the large ancient failures and most likely extreme events determined by a probabilistic approach. Since tsunamis are not well-understood along the Gulf Coast, we investigate tsunami inundation referenced to category-specific hurricane storm surge levels, which are relatively well established along the Gulf Coast, in order to provide information for assessing the potential threat of tsunamis which is more understandable and accessible to emergency managers. Based on tsunami inundation studies prepared for the communities of South Padre Island, TX, Galveston, TX, Mobile, AL, Panama City, FL, and Tampa, FL, we identify regional trends of tsunami inundation in terms of modeled storm surge inundation. The general trends indicate that tsunami inundation can well exceed the level of storm surge from major hurricanes in open beachfront and barrier island regions, while more interior areas are less threatened. Such information can be used to better prepare for tsunami events as well as provide a preliminary estimate of tsunami hazard in locations where detailed tsunami inundation studies have not been completed.

  8. Radon in the Gulf Coast area: Potential problem or exaggerated risk?

    SciTech Connect

    Duex, T.W.

    1994-12-31

    Indoor air pollution from radon has been identified by the U.S. Environmental Protection Agency (U.S. EPA) as a serious health problem; estimates indicate that radon is the second-leading cause of lung cancer (after smoking) and that high levels of radon may cause as many as 20,000 to 40,000 lung cancer deaths per year in the United States. Studies of the potential risk in the Gulf Coast have been few. This report summarizes more than 7,000 previously unreported radon analyses and relates them to geological information in order to identify possible problem areas for the Gulf Coast region of Louisiana, Texas, Mississippi, Alabama, and Florida. High levels of indoor radon are generally associated with older {open_quotes}crystalline{close_quotes} igneous and metamorphic bedrock. Thus, most areas of the Gulf Coast are relatively low risk because they are underlain by Cenozoic sedimentary rocks and unconsolidated deposits. However, some types of sedimentary deposits, such as {open_quotes}black shale{close_quotes} and phosphate-rich rocks, can be areas of high risk. According to the U.S. EPA indoor radon survey results the percentage of houses with screening levels greater than 4 pCi/l (picocuries per liter) for given states is as follows: AL = 6.0%; LA = 0.8%; MS = 2.0%; and TX = 4.0% (no data available for FL). The data developed in the current study indicate that the percentage of houses with greater than 4/pCi/l for given states as follows: AL = 6.1%; LA = 0.6%; MS = 2.0%; TX =1.6%; and FL = 4.5%. The areas that appear to have the greatest risk are parts of northern Alabama and Mississippi, central Texas, and some areas in Florida.

  9. Radon in the Gulf Coast area: Potential problem or exaggerated risk?

    SciTech Connect

    Duex, T.W.

    1994-09-01

    Indoor air pollution from radon has been identified by the EPA as a serious health problem; estimates indicate that radon is the second leading cause of lung cancer (after smoking) and that high levels of radon may cause as many as 20,000 to 40,000 lung cancer deaths per year in the United States. Studies of the potential risk in the Gulf Coast have been sparse. This report summarizes over 7000 previously unreported radon analyses and relates them to geological information to identify possible problem areas for the Gulf Coast region of Louisiana, Texas, Mississippi, Alabama, and Florida. High levels of indoor radon are generally associated with older {open_quotes}crystalline{close_quotes} igneous and metamorphic bedrock; thus, most areas of the Gulf Coast are of relatively low risk because they are underlain by Cenozoic sedimentary rocks and unconsolidated deposits. However, some types of sedimentary deposits, such as {open_quotes}black shale{close_quotes} and phosphate-rich rocks, can underlie areas of high risk. According to EPA indoor radon survey results the percentage of houses with screening levels greater than 4 pCi/1 (picocuries per liter) for given states is as follows: Alabama = 0.6%, Louisiana = 0.8%, Mississippi = 2.0%, and Texas = 4.0% (no data available for Florida). The data presented here for the percentage of houses with greater than 4 pCi/1 for given states is as follows: Alabama = 6.1 %, Louisiana = 0.6%, Mississippi = 2.0%, Texas = 1.6%, and Florida = 4.5%. The areas that appear to have the greatest risk are parts of northern Alabama and Mississippi, central Texas, and some areas in Florida.

  10. Understanding sea level rise along the Mississippi sector of the US Gulf Coast

    NASA Astrophysics Data System (ADS)

    Milne, G. A.; Wolstencroft, M.; Shen, Z.; Tornqvist, T. E.; Kulp, M.; Love, R.

    2013-12-01

    The Mississippi Delta (MD) and the adjacent US Gulf Coast host a significant population,extensive economic activity, and critical ecosystem goods and services. The characteristic rate of 20th century relative sea level rise in the MD is ~10 mm/yr [e.g., Penland and Ramsey, 1990], which is about five times the global mean value. This regional amplification, thought to be dominated by land subsidence, makes this part of the Gulf Coast particularly vulnerable to catastrophic events (e.g., storm surges associated with tropical cyclones) as well as more chronic environmental degradation such as wetland loss from a range of largely human influences [Day et al., 2007]. This paper focuses on improving our understanding of land subsidence in this region via a modelling analysis that considers the influence of sediment loading as well as glacial isostatic adjustment (ice and ocean loading). A number of studies have suggested that sediment isostatic adjustment (SIA) and/or active tectonics are primary contributors to the present-day subsidence of this region [e.g. Dokka et al., 2006; Ivins et al., 2007] and thus contribute several mm/yr of regional basement subsidence. Our model sensitivity analysis considers key components of the regional sediment loading history as well as a range of plausible Earth model parameters. Results indicate that rates due to SIA are likely less that 0.5 mm/yr and those due to GIA can be up to ~2 mm/yr and so the latter plays a more important role. Model output was found to be compatible with both paleo (e.g. relative sea level) and geodetic (Global Positioning System) observations. We therefore conclude that processes other than SIA and GIA, such as sediment compaction in the Holocene sediments, most likely dominate the high rates of sea level change (~10 mm/yr) measured along this part of the Gulf Coast.

  11. Pulses of middle Eocene to earliest Oligocene climatic deterioration in southern California and the Gulf Coast

    USGS Publications Warehouse

    Frederiksen, N.O.

    1991-01-01

    A general deterioration of terrestrial climate took place during middle Eocene to earliest Oligocene time in southern California and in the Gulf Coast. Pollen data, calibrated by calcareous nannofossil ages, indicate four events of rapid floral and/or vegetational change among angiosperms during this time interval. The events can be correlated between the two regions even though these regions lay within different floristic provinces, and each event of angiosperm change is interpreted to indicate a pulse of rapid climatic shift. The most distinct of these events is the Middle Eocene Diversity Decline, which resulted from a peak in last appearances (extinctions, emigrations) centered in the early Bartonian. -from Author

  12. The Vermetidae of the Gulf of Kachchh, western coast of India (Mollusca, Gastropoda)

    PubMed Central

    Joshi, Devanshi MukundRay; Mankodi, Pradeep C.

    2016-01-01

    Abstract Coral reefs are often termed underwater wonderlands due to the presence of an incredible biodiversity including numerous invertebrates and vertebrates. Among the dense population of benthic and bottom-dwelling inhabitants of the reef, many significant species remain hidden or neglected by researchers. One such example is the vermetids, a unique group of marine gastropods. The present study attempts for the first time to assess the density and identify preferred reef substrates in the Gulf of Kachchh, state of Gujarat, on the western coast of India. A total of three species of the family Vermetidae were recorded during the study and their substrate preferences identified. PMID:26877684

  13. Study of application of remote sensing data to land use planning on the Mississippi gulf coast

    NASA Technical Reports Server (NTRS)

    Ingels, F. M. (Principal Investigator); Boyd, R. W.

    1973-01-01

    The author has identified the following significant results. This project is currently involved in making visits to state and county agencies to obtain their reactions and opinions to the Mississippi Gulf Coast ERTS-1 data. The data products being used in these interviews are produced by NASA/MTF-ERL and consist of computer plotted maps with eight classifications and a statistical summary in booklet form. Reaction by potential users has been very favorable, but cost will be the largely determining factor in their ability to utilize ERTS-1 data in a recurring manner.

  14. Bird Movements and Behaviors in the Gulf Coast Region: Relation to Potential Wind-Energy Developments

    SciTech Connect

    Morrison, M. L.

    2006-06-01

    The purpose of this paper is to discuss the possible impacts of wind development to birds along the lower Gulf Coast, including both proposed near-shore and offshore developments. The report summarizes wind resources in Texas, discusses timing and magnitude of bird migration as it relates to wind development, reviews research that has been conducted throughout the world on near- and offshore developments, and provides recommendations for research that will help guide wind development that minimizes negative impacts to birds and other wildlife resources.

  15. Overview of the recent sediment hydrocarbon geochemistry of Atlantic and Gulf Coast outer continental shelf environments

    NASA Astrophysics Data System (ADS)

    Boehm, Paul D.; Requejo, A. G.

    1986-07-01

    An overview of the hydrocarbon geochemistry of recent marine sediments from the U.S. Atlantic and Gulf of Mexico Outer Continental Shelf (OCS) regions is presented. Hydrocarbon levels along the Atlantic OCS are fairly uniform, ranging between <0·1 and 20 ppm, with the higher values occurring in areas of fine-grained sediment accumulation. Elevated hydrocarbon concentrations appear to be associated with anthropogenic inputs of silt/clay-sized particles to OCS sediments via particulate resuspension and transport, as evidenced by an increase in contributions from the unresolved complex mixture (UCM) feature in gas chromatograms. Compositional characteristics of hydrocarbons in the high-carbonate sediments of the Eastern Gulf OCS indicate a primarily marine origin. Proceeding north and west along the shelf, sedimentary hydrocarbons assume a more terrestrial and/or anthropogenic character in response to a greater input of silt/clays from the Mississippi River. Highest hydrocarbon concentrations in this region (up to 70 ppm) are found in the shallow nearshore areas west of the Mississippi River discharge and in the vicinity of Galveston Bay along the South Texas OCS. In the North Atlantic, Eastern Gulf, South Texas Gulf and coastal Louisiana sediments a linear relationship exists between total hydrocarbon and total organic carbon concentrations, indicating that each area consists of a geochemical 'province' defined by a source input or depositional regime specific to the region. The use of trace parameter/bulk parameter ratios (such as total hydrocarbon or individual PAH concentrations/total organic carbon content) in defining such provinces, and thus in serving as a basis for evaluating variations in source inputs as part of future surveys, is demonstrated. This approach views the hydrocarbon content and composition of Atlantic and Gulf coast OCS sediments as points on a spectrum defined by input types (sources) and deposition patterns (sedimentation and erosion

  16. The Calm AFTER the Storm: An Interview with Laura Bush about the Caring Power of the Gulf Coast School Library Recovery Initiative

    ERIC Educational Resources Information Center

    Walker, Julie

    2012-01-01

    In 2005, a record breaking 26 named tropical storms including 13 hurricanes ravaged the Gulf Coast of the United States. In response to the devastation of hundreds of schools, the Laura Bush Foundation swiftly created The Gulf Coast School Library Recovery Initiative to help school libraries become fully functional and to offer the needed print…

  17. The Calm AFTER the Storm: An Interview with Laura Bush about the Caring Power of the Gulf Coast School Library Recovery Initiative

    ERIC Educational Resources Information Center

    Walker, Julie

    2012-01-01

    In 2005, a record breaking 26 named tropical storms including 13 hurricanes ravaged the Gulf Coast of the United States. In response to the devastation of hundreds of schools, the Laura Bush Foundation swiftly created The Gulf Coast School Library Recovery Initiative to help school libraries become fully functional and to offer the needed print…

  18. Overview of Collaborative Project to Develop Tsunami Hazard Assessments for the US Atlantic and Gulf Coasts

    NASA Astrophysics Data System (ADS)

    Kammerer, A. M.; ten Brink, U. S.; Titov, V. V.

    2008-12-01

    In response to the 2004 Indian Ocean Tsunami, and in anticipation of new license applications, the United States Nuclear Regulatory Commission (US NRC) initiated a long-term research program to improve understanding of tsunami hazard levels for coastal facilities on the U.S. Atlantic and Gulf Coasts. For this effort, the US NRC organized a collaborative research program with researchers at the United States Geological Survey (USGS) and the National Oceanic and Atmospheric Administration (NOAA). Key researchers from universities and other groups have also made important contributions to this program. The work undertaken represents the combined effort of a diverse group of marine geologists, geophysicists, geotechnical engineers, and hydrodynamic modelers. The Atlantic and Gulf coasts are the focus of this program due to the number of existing and proposed nuclear facilities located on these coasts and because less is generally known about tsunami hazard on these coasts. Because the US NRC is interested in understanding hazard associated with the rare large tsunami that may occur over long time periods (in excess of 10,000 years), the research program considers both seismic and landslide tsunamigenic sources. It also includes the study of both large far-field sources and near-field sources. The study of tsunamigenic landslides is a key difference between this research program and other tsunami hazard assessment programs. In the initial phase, significant effort was focused on identifying and characterizing offshore near-field landslides and on understanding their regional distribution along the coasts. Once early results were obtained, modeling of one of the larger slides was initiated to better understand the hazard posed by the slides identified. Important properties of the slide, such as flow velocity, were characterized through work that included analysis of the dynamic elements. The research related to far-field tsunamigenic landslides has similarly focused on

  19. View of Gulf coast area of Louisiana from Skylab space station

    NASA Image and Video Library

    1974-02-01

    SL4-136-3475 (February 1974) --- A vertical view of the Gulf coast area of Louisiana (29.0N, 92.0W) as seen from the Skylab space station in Earth orbit. A Skylab 4 crewman used a hand-held 70mm Hasselblad camera to take this picture. This view extends from White Lake and Pecan Island (bottom border) eastward to the Mississippi River delta (top left). Atchafalaya Bay (red) is in the center. The Bayou Teche area is included in this view. A prominent feature of this photograph is two large white smoke plumes extending from Louisiana south into the Gulf of Mexico. The larger smoke plume originates on the southern shore of Vermillion Bay. The other plume extends from the southern shore of Marsh Island. The prononced narrow width and length of the plumes indicate that a strong offshore wind is present. Approximately 100 miles of the plumes are visible in this photograph; but they probably extend well into the Gulf of Mexico. Photo credit: NASA

  20. Evaluation of Gulf Coast Ticks (Acari: Ixodidae) for Ehrlichia and Anaplasma Species.

    PubMed

    Allerdice, Michelle E J; Hecht, Joy A; Karpathy, Sandor E; Paddock, Christopher D

    2017-03-01

    Amblyomma maculatum Koch (the Gulf Coast tick) is an aggressive, human-biting ixodid tick distributed throughout much of the southeastern United States and is the primary vector for Rickettsia parkeri, an emerging human pathogen. Amblyomma maculatum has diverse host preferences that include white-tailed deer, a known reservoir for Ehrlichia and Anaplasma species, including the human pathogens E. ewingii and E. chaffeensis. To examine more closely the potential role of A. maculatum in the maintenance of various pathogenic Ehrlichia and Anaplasma species, we screened DNA samples from 493 questing adult A. maculatum collected from six U.S. states using broad-range Anaplasmataceae and Ehrlichia genus-specific PCR assays. Of the samples tested, four (0.8%) were positive for DNA of Ehrlichia ewingii, one (0.2%) was positive for Anaplasma platys, and one (0.2%) was positive for a previously unreported Ehrlichia species closely related to Ehrlichia muris and an uncultivated Ehrlichia species from Haemaphysalis longicornis ticks in Japan. No ticks contained DNA of Ehrlichia chaffeensis, Ehrlichia canis, the Panola Mountain Ehrlichia, or Anaplasma phagocytophilum. This is the first identification of E. ewingii, A. platys, and the novel Ehrlichia in questing Gulf Coast ticks; nonetheless the low prevalence of these agents suggests that A. maculatum is not likely an important vector of these zoonotic pathogens.

  1. Origin of Na-Ca-Cl brines in Jurassic and Cretaceous reservoirs of Gulf Coast

    SciTech Connect

    Carpenter, A.B.

    1985-02-01

    Na-Ca-Cl brines in Jurassic and Cretaceous reservoirs in the Gulf Coast have been attributed to the diagenesis of concentrated Jurassic seawater related to Louann Salt deposition and alternatively to the diagenesis of brines produced by halie dissolution. These brines contain up to 35,000 mg/L Ca, up to 4000 mg/L, from 400 to 2400 mgL Br, and up to 13,000 mg/L K. Mutual relationships of Na, Cl, total divalent cations minus sulfate and bicarbonate, K, and Br are similar to those in seawater that has been evaporated past the initial stage of halite deposition, particularly when the K content of the brine exceeds 5000 mg/L. The concentrations of divalent cations and K increase, and the mutual relationships of all the dissolved salts become increasingly similar to those in seawater with increasing proximity to bedded salt. The abundance of authigenic K-feldspar in rocks above the salt beds explains the relatively rapid decrease in the K content of the brines upsection. The Ca and K contents of Jurassic Gulf Coast brines are similar to those in Na-Ca-Cl brines in feldspar-poor carbonate sequences in other basins.

  2. Use of rocuronium for endotracheal intubation of North American Gulf Coast box turtles.

    PubMed

    Kaufman, Gretchen E; Seymour, Rosemarie E; Bonner, Barbara B; Court, Michael H; Karas, Alicia Z

    2003-04-15

    To determine whether rocuronium, a reversible neuromuscular blocking agent, would provide safe, short-term immobilization to facilitate endotracheal intubation in turtles. Prospective study. 30 healthy adult Gulf Coast box turtles. Turtles were given rocuronium, and responses were recorded every 3 minutes. Times to onset of effects, intubation, and recovery were recorded and analyzed for associations with dose and patient characteristics to determine an optimal dose range. Neostigmine and glycopyrrolate were given to augment recovery from neuromuscular blockade. Rocuronium administered at a dose of 0.25 to 0.5 mg/kg (0.11 to 0.23 mg/lb), IM, permitted intubation; lower doses were not effective. Mean +/- SD time to loss of the palpebral reflex was 6.4 +/- 4.0 minutes, and mean time to intubation was 9.2 +/- 6.4 minutes. Mean time to return of the palpebral reflex was 44 +/- 13.2 minutes, and mean time to walking was 55 +/- 16.6 minutes. Time to onset of effects was not associated with dose, but recovery times were prolonged with higher doses of rocuronium. Cardiac arrhythmias were observed in 13 (43%) turtles. Administration of rocuronium at a dose of 0.25 to 0.5 mg/kg is a safe and effective adjunct to general anesthesia in Gulf Coast box turtles. Because rocuronium does not provide any analgesic or sedative effects, the duration of neuromuscular blockade without anesthesia should be minimized to avoid undue distress.

  3. VULNERABILITY TO HURRICANE DAMAGE ON THE U.S. GULF COAST SINCE 1950

    PubMed Central

    LOGAN, JOHN R.; XU, ZENGWANG

    2015-01-01

    We study hurricane risk on the U.S. Gulf Coast during 1950–2005, estimating the wind damage and storm surge from every hurricane in this extended period. Wind damage is estimated from the known path and wind speeds of individual storms and calibrated to fit actual damage reports for a sample of Gulf Coast storms. Storm surge is estimated using the SLOSH model developed by NOAA. These models provide the first comprehensive overview of the hurricane storm hazard as it has been experienced over a fifty-six-year period. We link the estimated damage with information on the population and specific socio-demographic components of the population (by age, race, and poverty status). Results show that white, young adult, and nonpoor populations have shifted over time away from zones with higher risk of wind damage, while more vulnerable population groups–the elderly, African Americans, and poor—have moved in the opposite direction. All groups have moved away from areas with high risk of storm surge since 1970. But in this case, perhaps because living near the water is still perceived as an amenity, those at highest risk are whites, elderly, and nonpoor households. Here exposure represents a trade-off between the risk and the amenity. PMID:25926706

  4. VULNERABILITY TO HURRICANE DAMAGE ON THE U.S. GULF COAST SINCE 1950.

    PubMed

    Logan, John R; Xu, Zengwang

    2015-04-01

    We study hurricane risk on the U.S. Gulf Coast during 1950-2005, estimating the wind damage and storm surge from every hurricane in this extended period. Wind damage is estimated from the known path and wind speeds of individual storms and calibrated to fit actual damage reports for a sample of Gulf Coast storms. Storm surge is estimated using the SLOSH model developed by NOAA. These models provide the first comprehensive overview of the hurricane storm hazard as it has been experienced over a fifty-six-year period. We link the estimated damage with information on the population and specific socio-demographic components of the population (by age, race, and poverty status). Results show that white, young adult, and nonpoor populations have shifted over time away from zones with higher risk of wind damage, while more vulnerable population groups-the elderly, African Americans, and poor-have moved in the opposite direction. All groups have moved away from areas with high risk of storm surge since 1970. But in this case, perhaps because living near the water is still perceived as an amenity, those at highest risk are whites, elderly, and nonpoor households. Here exposure represents a trade-off between the risk and the amenity.

  5. Pipeline transportation of natural gas from the Gulf Coast to the Northeast

    SciTech Connect

    Boehm, J.C.

    1980-01-01

    Transcontinental Gas Pipe Line Corp.'s national gas pipeline system from the Gulf Coast producing area (where 75% of its supply lies offshore) extends for 1832 mi along the Gulf Coast through the southeastern Piedmont and north to terminate in New York City. It serves high-priority markets in 11 southern and Atlantic seaboard states with a daily flowing capacity of 3.0 billion cu ft/day and an additional 1.5 billion cu ft/day available from storage. Also discussed are gas conditioning for the removal of hydrogen sulfide, carbon dioxide, water vapor and entrained salt water and solids, and measurement of gas volume with a meter and gravitometer and of heating value with a calorimeter; gas transmission through 9,295 mi of pipeline, made up mostly of four, 30-42 in. dia parallel pipelines with 1,062,452 hp of compression capacity; LNG storage, including unique facilities at the Eminence, Miss., Salt Dome Storage facility and the Carlstadt, N.J., LNG plant; odorization; operations; and pipeline protection against third-party damage and against corrosion.

  6. Influence of Water Temperature and Salinity on Vibrio vulnificus in Northern Gulf and Atlantic Coast Oysters (Crassostrea virginica)

    PubMed Central

    Motes, M. L.; DePaola, A.; Cook, D. W.; Veazey, J. E.; Hunsucker, J. C.; Garthright, W. E.; Blodgett, R. J.; Chirtel, S. J.

    1998-01-01

    This study investigated the temperature and salinity parameters associated with waters and oysters linked to food-borne Vibrio vulnificus infections. V. vulnificus was enumerated in oysters collected at three northern Gulf Coast sites and two Atlantic Coast sites from July 1994 through September 1995. Two of these sites, Black Bay, La., and Apalachicola Bay, Fla., are the source of the majority of the oysters implicated in V. vulnificus cases. Oysters in all Gulf Coast sites exhibited a similar seasonal distribution of V. vulnificus: a consistently large number (median concentration, 2,300 organisms [most probable number] per g of oyster meat) from May through October followed by a gradual reduction during November and December to ≤10 per g, where it remained from January through mid-March, and a sharp increase in late March and April to summer levels. V. vulnificus was undetectable (<3 per g) in oysters from the North and South Carolina sites for most of the year. An exception occurred when a late-summer flood caused a drop in salinity in the North Carolina estuary, apparently causing V. vulnificus numbers to increase briefly to Gulf Coast levels. At Gulf Coast sites, V. vulnificus numbers increased with water temperatures up to 26°C and were constant at higher temperatures. High V. vulnificus levels (>103 per g) were typically found in oysters from intermediate salinities (5 to 25 ppt). Smaller V. vulnificus numbers (<102 per g) were found at salinities above 28 ppt, typical of Atlantic Coast sites. On 11 occasions oysters were sampled at times and locations near the source of oysters implicated in 13 V. vulnificus cases; the V. vulnificus levels and environmental parameters associated with these samples were consistent with those of other study samples collected from the Gulf Coast from April through November. These findings suggest that the hazard of V. vulnificus infection is not limited to brief periods of unusual abundance of V. vulnificus in Gulf Coast

  7. Fingerprinting groundwater salinity sources in the Gulf Coast Aquifer System, USA

    NASA Astrophysics Data System (ADS)

    Chowdhury, Ali H.; Scanlon, Bridget R.; Reedy, Robert C.; Young, Steve

    2017-07-01

    Understanding groundwater salinity sources in the Gulf Coast Aquifer System (GCAS) is a critical issue due to depletion of fresh groundwater and concerns for potential seawater intrusion. The study objective was to assess sources of groundwater salinity in the GCAS using ˜1,400 chemical analyses and ˜90 isotopic analyses along nine well transects in the Texas Gulf Coast, USA. Salinity increases from northeast (median total dissolved solids (TDS) 340 mg/L) to southwest (median TDS 1,160 mg/L), which inversely correlates with the precipitation distribution pattern (1,370- 600 mm/yr, respectively). Molar Cl/Br ratios (median 540-600), depleted δ2H and δ18O (-24.7‰, -4.5‰) relative to seawater (Cl/Br ˜655 and δ2H, δ18O 0‰, 0‰, respectively), and elevated 36Cl/Cl ratios (˜100), suggest precipitation enriched with marine aerosols as the dominant salinity source. Mass balance estimates suggest that marine aerosols could adequately explain salt loading over the large expanse of the GCAS. Evapotranspiration enrichment to the southwest is supported by elevated chloride concentrations in soil profiles and higher δ18O. Secondary salinity sources include dissolution of salt domes or upwelling brines from geopressured zones along growth faults, mainly near the coast in the northeast. The regional extent and large quantities of brackish water have the potential to support moderate-sized desalination plants in this location. These results have important implications for groundwater management, suggesting a current lack of regional seawater intrusion and a suitable source of relatively low TDS water for desalination.

  8. Factors influencing safety among a group of commercial fishermen along the Texas Gulf Coast.

    PubMed

    Levin, Jeffrey L; Gilmore, Karen; Shepherd, Sara; Wickman, Amanda; Carruth, Ann; Nalbone, J Torey; Gallardo, Gilbert; Nonnenmann, Matthew W

    2010-10-01

    The commercial fishing trades are among the most dangerous jobs in the world. Little published information exists regarding some populations of commercial fishermen such as along the United States Gulf Coast. Studying these unique and often vulnerable groups is important to characterize potential influences on or barriers to safety in anticipation of designing interventions that can change safety behaviors. Working closely with the United States Coast Guard (USCG), a cross-sectional convenience sample of Gulf Coast shrimp fishermen in and near the Port of Galveston, Texas, was surveyed. The survey included demographic factors and broadly covered areas such as type of work and fishing activities, general or global perceptions and beliefs related to safety and accidents, self-report of ability to use safety equipment or apply procedures aboard vessel, and training considerations. Surveys were obtained following informed consent (n = 133). Of the participants, 96.7% were male with 60.9% ≥40 years old. A majority were of Asian descent (57.1% of all fishermen, 82.1% of shrimp fishermen). Over half claimed to speak little or no English and nearly 60% considered the job to be very safe to neutral. A third to half of respondents expressed doubt about their knowledge of using essential safety equipment in the event of emergency. A large portion of the participants preferred hands-on safety training (40.6%). Important findings about this group of commercial fishermen will help with future development of effective prevention practices through the delivery of culturally appropriate safety awareness training. One element that must be addressed in training programs is to increase the awareness among fishermen about the severe occupational risks inherent in this type of work. Community trust and collaborative partnerships are essential to the success of such initiatives.

  9. Review of the NURE assessment of the U.S. Gulf Coast Uranium Province

    USGS Publications Warehouse

    Hall, Susan M.

    2013-01-01

    Historic exploration and development were used to evaluate the reliability of domestic uranium reserves and potential resources estimated by the U.S. Department of Energy national uranium resource evaluation (NURE) program in the U.S. Gulf Coast Uranium Province. NURE estimated 87 million pounds of reserves in the $30/lb U3O8 cost category in the Coast Plain uranium resource region, most in the Gulf Coast Uranium Province. Since NURE, 40 million pounds of reserves have been mined, and 38 million pounds are estimated to remain in place as of 2012, accounting for all but 9 million pounds of U3O8 in the reserve or production categories in the NURE estimate. Considering the complexities and uncertainties of the analysis, this study indicates that the NURE reserve estimates for the province were accurate. An unconditional potential resource of 1.4 billion pounds of U3O8, 600 million pounds of U3O8 in the forward cost category of $30/lb U3O8 (1980 prices), was estimated in 106 favorable areas by the NURE program in the province. Removing potential resources from the non-productive Houston embayment, and those reserves estimated below historic and current mining depths reduces the unconditional potential resource 33% to about 930 million pounds of U3O8, and that in the $30/lb cost category 34% to 399 million pounds of U3O8. Based on production records and reserve estimates tabulated for the region, most of the production since 1980 is likely from the reserves identified by NURE. The potential resource predicted by NURE has not been developed, likely due to a variety of factors related to the low uranium prices that have prevailed since 1980.

  10. Transport and diffusion climatology of the US Atlantic and Gulf coasts

    SciTech Connect

    Raynor, G.S.; Hayes, J.V.

    1980-01-01

    This study is part of a larger study of coastal meteorology and diffusion and was planned to assist in site selection of energy facilities by describing the transport and diffusion climatology of the United States east and Gulf coasts in as much detail as can be extracted from readily available meteorological data. The area covered in this study is the United States east and Gulf coasts from Maine to Texas. The region studied is all within the coastal plain and is generally characterized by flat beaches and very gentle slopes inland except in New England, where the coast is more rugged and the terrain hilly close to the sea. Meteorological variables of primary concern in this study are those which govern or influence transport and diffusion of airborne gases and particles. The most important are wind direction and speed and some measure of diffusive capacity such as turbulence, gustiness or lapse rate. Eight stations were chosen to give four pairs for comparison between a coastal station and another somewhat farther inland. The pairs are Boston and Bedford, Massachusetts; Belmar and Lakehurst, New Jersey; Cape Kennedy and Orlando, Florida; and Galveston and Houston, Texas. The same years of data were obtained for both stations in each pair. Results of selected examples are presented. The frequency of calms and of winds in the three sectors relative to the coastline is reported for the 25 coastal stations from Portland, Maine (PWM) to Brownsville, Texas (BRO). Differences between day and night in wind direction distribution are shown for six selected stations. The frequency of the five diffusion rating classes at the same coastal stations during onshore winds is also shown. Differences in dffusion conditions between day and night at six selected stations are given. The results obtained were arranged for easy use with diffusion models in which the primary meteorological inputs are wind speed and measures of lateral and vertical diffusion. (JGB)

  11. Review of the NURE Assessment of the U.S. Gulf Coast Uranium Province

    SciTech Connect

    Hall, Susan M.

    2013-09-15

    Historic exploration and development were used to evaluate the reliability of domestic uranium reserves and potential resources estimated by the U.S. Department of Energy national uranium resource evaluation (NURE) program in the U.S. Gulf Coast Uranium Province. NURE estimated 87 million pounds of reserves in the $30/lb U{sub 3}O{sub 8} cost category in the Coast Plain uranium resource region, most in the Gulf Coast Uranium Province. Since NURE, 40 million pounds of reserves have been mined, and 38 million pounds are estimated to remain in place as of 2012, accounting for all but 9 million pounds of U{sub 3}O{sub 8} in the reserve or production categories in the NURE estimate. Considering the complexities and uncertainties of the analysis, this study indicates that the NURE reserve estimates for the province were accurate. An unconditional potential resource of 1.4 billion pounds of U{sub 3}O{sub 8}, 600 million pounds of U{sub 3}O{sub 8} in the forward cost category of $30/lb U{sub 3}O{sub 8} (1980 prices), was estimated in 106 favorable areas by the NURE program in the province. Removing potential resources from the non-productive Houston embayment, and those reserves estimated below historic and current mining depths reduces the unconditional potential resource 33% to about 930 million pounds of U{sub 3}O{sub 8}, and that in the $30/lb cost category 34% to 399 million pounds of U{sub 3}O{sub 8}. Based on production records and reserve estimates tabulated for the region, most of the production since 1980 is likely from the reserves identified by NURE. The potential resource predicted by NURE has not been developed, likely due to a variety of factors related to the low uranium prices that have prevailed since 1980.

  12. Comparison of operational energy intensities and consumption of pipelines versus coastal tankers: US Gulf coast to northeast coast routes

    SciTech Connect

    Hooker, J.; Rose, A.B.; Bertram, K.M.

    1980-01-01

    This report is a comparative analysis of operational energy intensities and consumption for pipeline shipments versus coastal tanker and tanker-barge movements of light petroleum products from the US Gulf Coast to US East Coast Mid-Atlantic states. It has been prepared for the Office of Transportation Programs of the US Department of Energy (DOE) as part of a project designed to develop energy conservation strategies in the areas of modal shifts and energy materials transport. It also answers an expressed interest of DOE's Office of Competition as to whether energy penalties are being paid in this region by the shipment of this oil by tanker rather than pipeline. Detailed estimates are made of the 1977 energy intensities (EIs) for tankers and the two major pipelines serving these routes; these are the Colonial pipeline (from Houston) and the Plantation pipeline (from Baton Rouge). Estimates of potential operational energy savings gained from diverting these shipments from tankers to pipelines are figured from these EIs plus 1977 tanker short-ton volumes for these products. Also estimated for these diversions are additional savings of petroleum available through shifts from the fuel oil used to power tankers, to the other energy sources used by pipelines (e.g., coal, which is burned by the utilities serving them). Table 1 indicates that these tanker volumes have been large and steady as a whole; however, individual origin ports have had substantial variations since the 1973 Arab oil embargo. Indirect energy requirements of the two modes are not included in this analysis because the methodology for calculating them is still an unresolved research area (e.g., diagreements exist as to how much supporting-infrastructure energy usage should be included for a mode).

  13. Gulf Coast Hurricanes: Lessons Learned for Protecting and Educating Children. Briefing for Congressional Staff. GAO-06-680R

    ERIC Educational Resources Information Center

    Government Accountability Office, 2006

    2006-01-01

    In August and September 2005, Hurricanes Katrina and Rita caused devastating damage to states along the Gulf Coast. In the aftermath of the storms, many questions were raised about the status of the thousands of children living in the affected areas. The US Government Accountability Office (GAO) prepared this preliminary information under the…

  14. Assessment of undiscovered oil and gas resources in Jurassic and Cretaceous strata of the Gulf Coast, 2010

    USGS Publications Warehouse

    Dubiel, Russell F.; Warwick, Peter D.; Swanson, Sharon; Burke, Lauri; Biewick, Laura; Charpentier, Ronald R.; Coleman, James L.; Cook, Troy A.; Dennen, Kris; Doolan, Colin; Enomoto, Catherine; Hackley, Paul C.; Karlsen, Alexander W.; Klett, Timothy R.; Kinney, Scott A.; Lewan, Michael D.; Merrill, Matt; Pearson, Krystal; Pearson, Ofori N.; Pitman, Janet K.; Pollastro, Richard M.; Rowan, Elizabeth L.; Schenk, Christopher J.; Valentine, Brett

    2011-01-01

    Using a geology-based assessment methodology, the U.S. Geological Survey estimated means of 147.4 trillion cubic feet of undiscovered natural gas, 2.4 billion barrels of undiscovered oil, and 2.96 billion barrels of undiscovered natural gas liquids in Jurassic and Cretaceous strata in onshore lands and State waters of the Gulf Coast.

  15. Climate Change and Health on the U.S. Gulf Coast: Public Health Adaptation is Needed to Address Future Risks.

    PubMed

    Petkova, Elisaveta P; Ebi, Kristie L; Culp, Derrin; Redlener, Irwin

    2015-08-11

    The impacts of climate change on human health have been documented globally and in the United States. Numerous studies project greater morbidity and mortality as a result of extreme weather events and other climate-sensitive hazards. Public health impacts on the U.S. Gulf Coast may be severe as the region is expected to experience increases in extreme temperatures, sea level rise, and possibly fewer but more intense hurricanes. Through myriad pathways, climate change is likely to make the Gulf Coast less hospitable and more dangerous for its residents, and may prompt substantial migration from and into the region. Public health impacts may be further exacerbated by the concentration of people and infrastructure, as well as the region's coastal geography. Vulnerable populations, including the very young, elderly, and socioeconomically disadvantaged may face particularly high threats to their health and well-being. This paper provides an overview of potential public health impacts of climate variability and change on the Gulf Coast, with a focus on the region's unique vulnerabilities, and outlines recommendations for improving the region's ability to minimize the impacts of climate-sensitive hazards. Public health adaptation aimed at improving individual, public health system, and infrastructure resilience is urgently needed to meet the challenges climate change may pose to the Gulf Coast in the coming decades.

  16. Effective Communication to Aid Collaboration for Digital Collections: A Case Study at Florida Gulf Coast University Library

    ERIC Educational Resources Information Center

    VandeBurgt, Melissa Minds; Rivera, Kaleena

    2016-01-01

    Effective communication is one of the most important resources for successful outreach efforts. This article addresses the benefits that can emerge from successful communication as well as the negative effects that may stem from ineffective communication. A case study of Florida Gulf Coast University Archives, Special Collections, & Digital…

  17. Survivorship, development, and fecundity of buck moth (Lepidoptera: Saturniidae) on common tree species in the Gulf Coast urban forest

    Treesearch

    P. J. Martinat; J. D. Solomon; Theodor D. Leininger

    1996-01-01

    Hemileuca maia maia (Drury), the buck moth, is abundant in urban areas of the Gulf Coast region where it defoliates oaks. However, the extent to which the buck moth can survive on other tree species common in the southern urban forest has not been reported. In the laboratory, the authors studied the suitability and acceptability to larvae of 14 common tree species in...

  18. Assessment of undiscovered oil and gas resources in the Haynesville Formation, U.S. Gulf Coast, 2016

    USGS Publications Warehouse

    Paxton, Stanley T.; Pitman, Janet K.; Kinney, Scott A.; Gianoutsos, Nicholas J.; Pearson, Ofori N.; Whidden, Katherine J.; Dubiel, Russell F.; Schenk, Christopher J.; Burke, Lauri A.; Klett, Timothy R.; Leathers-Miller, Heidi M.; Mercier, Tracey J.; Haines, Seth S.; Varela, Brian A.; Le, Phuong A.; Finn, Thomas M.; Gaswirth, Stephanie B.; Hawkins, Sarah J.; Marra, Kristen R.; Tennyson, Marilyn E.

    2017-04-13

    Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 1.1 billion barrels of conventional oil and 195.8 trillion cubic feet of gas in the Upper Jurassic Haynesville Formation in onshore lands and State waters of the U.S. Gulf Coast region.

  19. Assessment of undiscovered oil and gas resources in the Bossier Formation, U.S. Gulf Coast, 2016

    USGS Publications Warehouse

    Paxton, Stanley T.; Pitman, Janet K.; Kinney, Scott A.; Gianoutsos, Nicholas J.; Pearson, Ofori N.; Whidden, Katherine J.; Dubiel, Russell F.; Schenk, Christopher J.; Burke, Lauri A.; Klett, Timothy R.; Leathers-Miller, Heidi M.; Mercier, Tracey J.; Haines, Seth S.; Varela, Brian A.; Le, Phuong A.; Finn, Thomas M.; Gaswirth, Stephanie B.; Hawkins, Sarah J.; Marra, Kristen R.; Tennyson, Marilyn E.

    2017-04-13

    Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 2.9 billion barrels of conventional oil and 108.6 trillion cubic feet of natural gas in the Upper Jurassic Bossier Formation in onshore lands and State waters of the U.S. Gulf Coast region.

  20. CONTAMINANT THRESHOLDS FOR PREDICTING ADVERSE IMPACTS IN BENTHIC COMMUNITIES ALONG THE U.S. ATLANTIC AND GULF OF MEXICO COASTS

    EPA Science Inventory

    EMAP 2001 Symposium, April 24-27, 2001, Pensacola, FL

    Matching data on sediment contaminants and macroinfauna from 1,349 samples collected as part of EMAP in estuaries along the U.S. Atlantic and Gulf of Mexico coasts were used to define thresholds for evaluating risks of ...

  1. Climate Change and Health on the U.S. Gulf Coast: Public Health Adaptation is Needed to Address Future Risks

    PubMed Central

    Petkova, Elisaveta P.; Ebi, Kristie L.; Culp, Derrin; Redlener, Irwin

    2015-01-01

    The impacts of climate change on human health have been documented globally and in the United States. Numerous studies project greater morbidity and mortality as a result of extreme weather events and other climate-sensitive hazards. Public health impacts on the U.S. Gulf Coast may be severe as the region is expected to experience increases in extreme temperatures, sea level rise, and possibly fewer but more intense hurricanes. Through myriad pathways, climate change is likely to make the Gulf Coast less hospitable and more dangerous for its residents, and may prompt substantial migration from and into the region. Public health impacts may be further exacerbated by the concentration of people and infrastructure, as well as the region’s coastal geography. Vulnerable populations, including the very young, elderly, and socioeconomically disadvantaged may face particularly high threats to their health and well-being. This paper provides an overview of potential public health impacts of climate variability and change on the Gulf Coast, with a focus on the region’s unique vulnerabilities, and outlines recommendations for improving the region’s ability to minimize the impacts of climate-sensitive hazards. Public health adaptation aimed at improving individual, public health system, and infrastructure resilience is urgently needed to meet the challenges climate change may pose to the Gulf Coast in the coming decades. PMID:26270669

  2. Light requirements of seagrasses determined from historical records of light attenuation along the Gulf coast of peninsular Florida

    Treesearch

    Zanethia D. Choice; Thomas K. Frazer; Charles A. Jacoby

    2014-01-01

    Seagrasses around the world are threatened by human activities that degrade water quality and reduce light availability. In this study, light requirements were determined for four common and abundant seagrasses along the Gulf coast of peninsular Florida using a threshold detecting algorithm. Light requirements ranged from 8% to 10% of surface irradiance for Halophila...

  3. Elementary Teachers' Perceptions of Response to Intervention and Teacher Support Team Effectiveness within a Mississippi Gulf Coast School District

    ERIC Educational Resources Information Center

    Rhodes, Shanta Dannette

    2014-01-01

    The purpose of this study was to examine elementary teachers' perceptions of the effectiveness of Response to Intervention (RTI) and Teacher Support Team (TST) within a Mississippi Gulf Coast school district. RTI models have gained popularity within the national education system. Schools are encouraged to implement RTI in efforts to improve the…

  4. Effective Communication to Aid Collaboration for Digital Collections: A Case Study at Florida Gulf Coast University Library

    ERIC Educational Resources Information Center

    VandeBurgt, Melissa Minds; Rivera, Kaleena

    2016-01-01

    Effective communication is one of the most important resources for successful outreach efforts. This article addresses the benefits that can emerge from successful communication as well as the negative effects that may stem from ineffective communication. A case study of Florida Gulf Coast University Archives, Special Collections, & Digital…

  5. Discharge between San Antonio Bay and Aransas Bay, southern Gulf Coast, Texas, May-September 1999

    USGS Publications Warehouse

    East, Jeffery W.

    2001-01-01

    Along the Gulf Coast of Texas, many estuaries and bays are important habitat and nurseries for aquatic life. San Antonio Bay and Aransas Bay, located about 50 and 30 miles northeast, respectively, of Corpus Christi, are two important estuarine nurseries on the southern Gulf Coast of Texas (fig. 1). According to the Texas Parks and Wildlife Department, “Almost 80 percent of the seagrasses [along the Texas Gulf Coast] are located in the Laguna Madre, an estuary that begins just south of Corpus Christi Bay and runs southward 140 miles to South Padre Island. Most of the remaining seagrasses, about 45,000 acres, are located in the heavily traveled San Antonio, Aransas and Corpus Christi Bay areas” (Shook, 2000).Population growth has led to greater demands on water supplies in Texas. The Texas Water Development Board, the Texas Parks and Wildlife Department, and the Texas Natural Resource Conservation Commission have the cooperative task of determining inflows required to maintain the ecological health of the State’s streams, rivers, bays, and estuaries. To determine these inflow requirements, the three agencies collect data and conduct studies on the need for instream flows and freshwater/ saline water inflows to Texas estuaries.To assist in the determination of freshwater inflow requirements, the U.S. Geological Survey (USGS), in cooperation with the Texas Water Development Board, conducted a hydrographic survey of discharge (flow) between San Antonio Bay and Aransas Bay during the period May–September 1999. Automated instrumentation and acoustic technology were used to maximize the amount and quality of data that were collected, while minimizing personnel requirements. This report documents the discharge measured at two sites between the bays during May–September 1999 and describes the influences of meteorologic (wind and tidal) and hydrologic (freshwater inflow) conditions on discharge between the two bays. The movement of water between the bays is

  6. Ground-water flow in the Gulf Coast aquifer systems, south-central United States

    USGS Publications Warehouse

    Williamson, A.K.; Grubb, H.F.

    2001-01-01

    The Gulf Coast regional aquifer systems constitute one of the largest, most complicated, and most interdependent aquifer systems in the United States. Ground-water flow in a 230,000-square-mile area of the south-central United States was modeled for the effect of withdrawing freshwater at the rate of nearly 10 billion gallons per day in 1985 from regional aquifers in the Mississippi Embayment, the Texas coastal uplands, and the coastal lowlands aquifer systems. The 1985 rate of pumping was three times the average rate of recharge to the aquifers before development. The report also estimates the effects of even greater withdrawal rates in the aquifer systems. About two-thirds of the water in the aquifers is saline to brine, which complicates the modeling. Land subsidence due to water withdrawal also was modeled.

  7. 1978 Houston-Galveston and Texas Gulf Coast vertical-control surveys

    SciTech Connect

    Balazs, E.I.

    1980-11-01

    Comparisons between leveling surveys of different epochs are used to determine vertical displacement of permanent bench marks. Displacement of bench marks usually represents the movement of the surrounding area. In this report, the 1978 Houston-Galveston and Texas Gulf Coast releveling surveys are compared to the 1963, 1973, and 1976 releveling results. The changes in elevations of bench marks common to two or more epochs are tabulated and plotted in Appendix A. From these differences, contour maps were prepared for the 1963 to 1978 and 1973 to 1978 epochs in the 2/sup 0/ x 2/sup 0/ area of maximum subsidence. Annual subsidence rates computed for the 1973 to 1978 period are about 25% less in the maximum subsidence area than the rates computed for the 1963 to 1973 period.

  8. The impact of climate change on transportation in the gulf coast

    USGS Publications Warehouse

    Savonis, M.J.; Burkett, V.R.; Potter, J.R.; Kafalenos, R.; Hyman, R.; Leonard, K.

    2009-01-01

    Climate affects the design, construction, safety, operations, and maintenance of transportation infrastructure and systems. The prospect of a changing climate raises critical questions regarding how alterations in temperature, precipitation, storm events, and other aspects of the climate could affect the nation's transportation system. This regional assessment of climate change and its potential impacts on transportation systems addresses these questions for the central Gulf Coast between Houston and Mobile. Warming temperatures are likely to increase the costs of transportation construction, maintenance, and operations. More frequent extreme precipitation events will likely disrupt transportation networks with flooding and visibility problems. Relative sea level rise will make much of the existing infrastructure more prone to frequent or permanent inundation. Increased storm intensity may lead to increased service disruption and damage. Consideration of these factors in today's transportation decisions should lead to a more robust, resilient, and cost-effective transportation network in the coming decades. ?? 2009 ASCE.

  9. The utility of ERTS-1 data for applications in land use classification. [Texas Gulf Coast

    NASA Technical Reports Server (NTRS)

    Dornbach, J. E.; Mckain, G. E.

    1974-01-01

    A comprehensive study has been undertaken to determine the extent to which conventional image interpretation and computer-aided (spectral pattern recognition) analysis techniques using ERTS-1 data could be used to detect, identify (classify), locate, and measure current land use over large geographic areas. It can be concluded that most of the level 1 and 2 categories in the USGS Circular no. 671 can be detected in the Houston-Gulf Coast area using a combination of both techniques for analysis. These capabilities could be exercised over larger geographic areas, however, certain factors such as different vegetative cover, topography, etc. may have to be considered in other geographic regions. The best results in identification (classification), location, and measurement of level 1 and 2 type categories appear to be obtainable through automatic data processing of multispectral scanner computer compatible tapes.

  10. Status and reproduction of Gulf coast strain walleye in a Tombigbee River tributary

    USGS Publications Warehouse

    Schramm, H.L.; Hart, J.; Hanson, L.A.

    2004-01-01

    Walleye (Sander vitreus [Mitchill]) are native to rivers and streams in the Mobile River basin in Mississippi and Alabama. These populations comprise a genetically unique strain (Gulf coast walleye, GCW) and represent the southernmost distribution of walleye in the United States. Luxapallila Creek was considered an important spawning site for GCW prior to and shortly after impoundment of the Tombigbee River in 1980. Extensive sampling in Luxapallila Creek in 2001 and 2002 collected only one larval walleye. Microsatellite DNA analysis suggested 14 of 16 adult walleye from Luxapallila Creek were hatchery-produced fish or their progeny. Controlled angling catch rates of adult walleye have declined since 1997. The scarcity of wild-spawned walleye and the similarity of wild-caught and hatchery broodstock walleye indicates that the GCW population in, or spawning in, Luxapallila Creek is sustained by stocking and recruitment from these stocked fish may be diminishing.

  11. Vertical distributions of molecular hydrogen off the eastern and Gulf coasts of the United States

    NASA Technical Reports Server (NTRS)

    Cofer, Wesley R., III; Harriss, Robert C.; Levine, Joel S.; Edahl, Robert A., Jr.

    1986-01-01

    The vertical distributions of molecular hydrogen (H2) and carbon monoxide (CO) were determined during spiraling maneuvers from aircraft off the eastern coast of the United States and over the Gulf of Mexico. H2 was always at its lowest levels in the boundary layer, averaging about 500 parts per billion by volume (ppbv). H2 mixing ratios determined in the free troposphere were typically higher (600-700 ppbv), and often suggested a small progressive increase with altitude. Several large free-tropospheric H2 plumes (mixing ratios as high as 1-2 parts per million by volume) were implied by the data. These H2 plumes were not always accompanied by corresponding increases in CO mixing ratios. This result is most difficult to explain when it is noted that the primary atmospheric sources for molecular H2 are considered to be combustion and photochemistry, both of which should be strong CO sources also.

  12. Foraging preferences influence microplastic ingestion by six marine fish species from the Texas Gulf Coast.

    PubMed

    Peters, Colleen A; Thomas, Peyton A; Rieper, Kaitlyn B; Bratton, Susan P

    2017-07-11

    This study evaluated the influence of foraging preferences on microplastic ingestion by six marine fish species from the Texas Gulf Coast. A total of 1381 fish were analyzed and 42.4% contained ingested microplastic, inclusive of fiber (86.4%), microbead (12.9% %), and fragment (<1.0%) forms. Despite a substantial overlap in diet, ordination of ingested prey items clustered samples into distinctive species groupings, reflective of the foraging gradient among species. Orthopristis chrysoptera displayed the lowest overall frequency of microplastic ingestion and the most distinctive ordination grouping, indicating their selective invertebrate foraging preferences. Cluster analysis of O. chrysoptera most closely classified microplastic with the ingestion of benthic invertebrates, whereas the ingestion of microplastic by all other species most closely classified with the ingestion of vegetation and shrimp. O. chrysoptera, as selective invertebrate foragers, are less likely to ingest microplastics than species exhibiting generalist foraging preferences and methods of prey capture. Copyright © 2017 Elsevier Ltd. All rights reserved.

  13. New distributional data on ascidian fauna (Tunicata: Ascidiacea) from Mandapam coast, Gulf of Mannar, India

    PubMed Central

    Akram, Soban A; Arshan, Kaleem ML

    2016-01-01

    Abstract Background Ascidians play a key role in the ecology and biodiversity of marine ecosystem. Ascidians can be transported in ship ballast water and while attached to ship and boat hulls. Heavy traffic by domestic and international ships as well as cargo vessels between the major and minor ports warrants continuous monitoring for new introductions of ascidians. The Mandapam coast is situated in the Gulf of Mannar, India, a marine hot spot area in the Indian Ocean which provides an environment suitable for the settlement of ascidians. New information A total of 30 species of ascidians were reported from Mandapam coastal waters, of which 26 species were new to the study area and five species: Ecteinascidia turbinata, Eudistoma carnosum, Trididemnum caelatum, T. vermiforme and Didemnum spadix, were new to India. PMID:27099557

  14. Injecting polyacrylamide into Gulf Coast sands: The White Castle Q sand polymer-injectivity test

    SciTech Connect

    Shahin, G.T.; Thigpen, D.R.

    1996-08-01

    A polymer-injectivity test designed to control mobility in cosurfactant-enhanced alkaline flooding was performed in the Q sand of the White Castle field, LA. Analysis of test data indicates that a polymer bank with an average viscosity of 4 cp was propagated as far as 90 ft into the reservoir with no measurable sign of degradation. It is estimated from pilot and laboratory data that injection of 500 ppm polyacrylamide through perforations at a rate of at least 32 B-D/in{sup 2} of perforation into gulf coast sands is feasible. Monitoring of backproduced reservoir samples indicates that, to date, no detectable change in viscosity has occurred over a 2-year period.

  15. Nutrition and health at contact in late prehistoric central Gulf Coast Florida.

    PubMed

    Hutchinson, Dale L; Norr, Lynette

    2006-03-01

    This paper presents an analysis of human remains from Tatham Mound, a dual-component mortuary site from central Gulf Coast Florida. The human remains from Tatham are significant because they come from a limited time period during the initial contact with Europeans at AD 1525-1550. Dietary reconstruction demonstrates that at the time of European contact, maize was not a predominant dietary item. Low frequencies for several dental and skeletal pathological indicators are consistent with relatively good health as compared to other Southeastern late prehistoric and protohistoric populations. Despite the limited time period represented by the mound population, critical interactions occurred between Native Americans and Spaniards, as indicated by skeletal elements severed by metal weapons. The Tatham population is significant because it is one of the earliest studied populations contacted by Europeans in North America, and the only one with well-documented sharp-force trauma that represents intergroup hostility. (c) 2005 Wiley-Liss, Inc.

  16. Hurricane Katrina's carbon footprint on U.S. Gulf Coast forests.

    PubMed

    Chambers, Jeffrey Q; Fisher, Jeremy I; Zeng, Hongcheng; Chapman, Elise L; Baker, David B; Hurtt, George C

    2007-11-16

    Hurricane Katrina's impact on U.S. Gulf Coast forests was quantified by linking ecological field studies, Landsat and Moderate Resolution Imaging Spectroradiometer (MODIS) image analyses, and empirically based models. Within areas affected by relatively constant wind speed, tree mortality and damage exhibited strong species-controlled gradients. Spatially explicit forest disturbance maps coupled with extrapolation models predicted mortality and severe structural damage to approximately 320 million large trees totaling 105 teragrams of carbon, representing 50 to 140% of the net annual U.S. forest tree carbon sink. Changes in disturbance regimes from increased storm activity expected under a warming climate will reduce forest biomass stocks, increase ecosystem respiration, and may represent an important positive feedback mechanism to elevated atmospheric carbon dioxide.

  17. Modeling and Prediction of Oyster Norovirus Outbreaks along Gulf of Mexico Coast.

    PubMed

    Wang, Jiao; Deng, Zhiqiang

    2016-05-01

    Oyster norovirus outbreaks often pose high risks to human health. However, little is known about environmental factors controlling the outbreaks, and little can be done to prevent the outbreaks because they are generally considered to be unpredictable. We sought to develop a mathematical model for predicting risks of oyster norovirus outbreaks using environmental predictors. We developed a novel probability-based Artificial Neural Network model, called NORF model, using 21 years of environmental and norovirus outbreak data collected from Louisiana oyster harvesting areas along the Gulf of Mexico coast, USA. The NORF model involves six input variables that were selected through stepwise regression analysis and sensitivity analysis. We found that the model-based probability of norovirus outbreaks was most sensitive to gage height (the depth of water in an oyster bed) and water temperature, followed by wind, rainfall, and salinity, respectively. The NORF model predicted all historical oyster norovirus outbreaks from 1994 through 2014. Specifically, norovirus outbreaks occurred when the NORF model probability estimate was > 0.6, whereas no outbreaks occurred when the estimated probability was < 0.5. Outbreaks may also occur when the estimated probability is 0.5-0.6. Our findings require further confirmation, but they suggest that oyster norovirus outbreaks may be predictable using the NORF model. The ability to predict oyster norovirus outbreaks at their onset may make it possible to prevent or at least reduce the risk of norovirus outbreaks by closing potentially affected oyster beds. Wang J, Deng Z. 2016. Modeling and prediction of oyster norovirus outbreaks along Gulf of Mexico coast. Environ Health Perspect 124:627-633; http://dx.doi.org/10.1289/ehp.1509764.

  18. Overpressure and hydrocarbon accumulations in Tertiary strata, Gulf Coast of Louisiana

    USGS Publications Warehouse

    Nelson, Philip H.

    2012-01-01

    Many oil and gas reservoirs in Tertiary strata of southern Louisiana are located close to the interface between a sand-rich, normally pressured sequence and an underlying sand-poor, overpressured sequence. This association, recognized for many years by Gulf Coast explorationists, is revisited here because of its relevance to an assessment of undiscovered oil and gas potential in the Gulf Coast of Louisiana. The transition from normally pressured to highly overpressured sediments is documented by converting mud weights to pressure, plotting all pressure data from an individual field as a function of depth, and selecting a top and base of the pressure transition zone. Vertical extents of pressure transition zones in 34 fields across southern onshore Louisiana range from 300 to 9000 ft and are greatest in younger strata and in the larger fields. Display of pressure transition zones on geologic cross sections illustrates the relative independence of the depth of the pressure transition zone and geologic age. Comparison of the depth distribution of pressure transition zones with production intervals confirms previous findings that production intervals generally overlap the pressure transition zone in depth and that the median production depth lies above the base of the pressure transition zone in most fields. However, in 11 of 55 fields with deep drilling, substantial amounts of oil and gas have been produced from depths deeper than 2000 ft below the base of the pressure transition zone. Mud-weight data in 7 fields show that "local" pressure gradients range from 0.91 to 1.26 psi/ft below the base of the pressure transition zone. Pressure gradients are higher and computed effective stress gradients are negative in younger strata in coastal areas, indicating that a greater potential for fluid and sediment movement exists there than in older Tertiary strata.

  19. Natural gas ultimate recovery growth modeling by plays in the Gulf Coast Basin

    NASA Astrophysics Data System (ADS)

    Kim, Eugene Miryong

    Estimates of ultimate recovery, the sum of the proved reserves and cumulative production up to a specific time, are initially conservative due to the lack of understanding of the geological, engineering, and production characteristics of the reservoir or field. Ultimate recovery tends on average to increase substantially over time and drilling due to better understanding of the reservoir or field and application of advanced technologies. In recent years, natural gas ultimate recovery growth has become a major component of total U.S. annual natural gas reserve additions. Although there is a wide range in ultimate recovery growth potential by play and that potential is a function of the drilling and technology applied, current ultimate recovery growth studies are gross, averaging wide ranges, aggregated by broad provinces, and calculated solely as a function of time. An assessment on a play basis is the key to understanding the future role of natural gas ultimate recovery growth in the Gulf Coast Basin. Ultimate recovery growth varies according to plays because of different geological, engineering, and production characteristics and amenability to advanced recovery technology. Natural gas ultimate recovery growth in Texas Railroad Commission (TX RRC) District 4 was initially analyzed on the basis of its role as a major natural gas producing district in the Gulf Coast Basin where significant technological advancements have been routinely applied. Significant ultimate recovery growth and future potential was observed for the total 520 major natural gas fields of TX RRC District 4. However, important ultimate recovery growth data were masked by such total, aggregated analysis. Play analysis revealed important ultimate recovery growth trends and characteristics. Plays WX-2, WX-4, and VK-1 revealed significant future ultimate recovery growth potential. These plays are comprised of relatively recently discovered fields, especially play WX-2. Deeper reservoir depths of

  20. Modeling and Prediction of Oyster Norovirus Outbreaks along Gulf of Mexico Coast

    PubMed Central

    Wang, Jiao; Deng, Zhiqiang

    2015-01-01

    Background: Oyster norovirus outbreaks often pose high risks to human health. However, little is known about environmental factors controlling the outbreaks, and little can be done to prevent the outbreaks because they are generally considered to be unpredictable. Objective: We sought to develop a mathematical model for predicting risks of oyster norovirus outbreaks using environmental predictors. Methods: We developed a novel probability-based Artificial Neural Network model, called NORF model, using 21 years of environmental and norovirus outbreak data collected from Louisiana oyster harvesting areas along the Gulf of Mexico coast, USA. The NORF model involves six input variables that were selected through stepwise regression analysis and sensitivity analysis. Results: We found that the model-based probability of norovirus outbreaks was most sensitive to gage height (the depth of water in an oyster bed) and water temperature, followed by wind, rainfall, and salinity, respectively. The NORF model predicted all historical oyster norovirus outbreaks from 1994 through 2014. Specifically, norovirus outbreaks occurred when the NORF model probability estimate was > 0.6, whereas no outbreaks occurred when the estimated probability was < 0.5. Outbreaks may also occur when the estimated probability is 0.5–0.6. Conclusions: Our findings require further confirmation, but they suggest that oyster norovirus outbreaks may be predictable using the NORF model. The ability to predict oyster norovirus outbreaks at their onset may make it possible to prevent or at least reduce the risk of norovirus outbreaks by closing potentially affected oyster beds. Citation: Wang J, Deng Z. 2016. Modeling and prediction of oyster norovirus outbreaks along Gulf of Mexico coast. Environ Health Perspect 124:627–633; http://dx.doi.org/10.1289/ehp.1509764 PMID:26528621

  1. Mental health needs assessment after the Gulf Coast oil spill-Alabama and Mississippi, 2010.

    PubMed

    Buttke, Danielle; Vagi, Sara; Bayleyegn, Tesfaye; Sircar, Kanta; Strine, Tara; Morrison, Melissa; Allen, Mardi; Wolkin, Amy

    2012-10-01

    Previous oil spills and disasters from other human-made events have shown that mental health effects to the affected population are widespread and can be significant. There has been concern regarding the likelihood that existing public health surveillance was not capturing the mental health effects to the population affected by the Gulf Coast oil spill. The objectives of this study were to assess the mental health needs of coastal communities in the states of Alabama and Mississippi following the Deepwater Horizon oil spill. A cluster sampling methodology was used to assess the mental health status of coastal residents in three counties in Alabama four months following the 2010 Deepwater Horizon oil spill, and in the Gulf Coast counties in Mississippi 5.5 months after the oil spill. A total of 469 residents of the selected areas were interviewed. Between 15.4 and 24.5% of the respondents reported depressive symptoms, with 21.4-31.5% reporting symptoms consistent with an anxiety disorder, and 16.3-22.8% reporting ≥14 mentally unhealthy days within the past 30 days. Overall, there were more negative quality of life indicators and negative social context outcomes than in the state's Behavioral Risk Factor Surveillance System (BRFSS) survey. Between 32.1% and 35.7% of all households reported decreased income since the oil spill, and 35.5-38.2% of all households reported having been exposed to oil. The proportion of respondents reporting negative mental health parameters in the affected Alabama and Mississippi coastal communities is higher than the proportion reported in the 2008 and 2009 BRFSS state reports, suggesting that the public health response to the Deepwater Horizon oil spill should focus on mental health services in these communities.

  2. Characterization and cycling of atmospheric mercury along the central US Gulf Coast

    USGS Publications Warehouse

    Engle, M.A.; Tate, M.T.; Krabbenhoft, D.P.; Kolker, A.; Olson, M.L.; Edgerton, E.S.; DeWild, J.F.; McPherson, A.K.

    2008-01-01

    Concentrations of atmospheric Hg species, elemental Hg (Hg{ring operator}), reactive gaseous Hg (RGM), and fine particulate Hg (Hg-PM2.5) were measured at a coastal site near Weeks Bay, Alabama from April to August, 2005 and January to May, 2006. Mean concentrations of the species were 1.6 ?? 0.3 ng m-3, 4.0 ?? 7.5 pg m-3 and 2.7 ?? 3.4 pg m-3, respectively. A strong diel pattern was observed for RGM (midday maximum concentrations were up to 92.7 pg m-3), but not for Hg{ring operator} or Hg-PM2.5. Elevated RGM concentrations (>25 pg m-3) in April and May of 2005 correlated with elevated average daytime O3 concentrations (>55 ppbv) and high light intensity (>500 W m-2). These conditions generally corresponded with mixed continental-Gulf and exclusively continental air mass trajectories. Generally lower, but still elevated, RGM peaks observed in August, 2005 and January-March, 2006 correlated significantly (p 2.5 ??m). A potential source of the large fraction of coarse particulate Hg in the study area is sequestration of RGM within sea salt aerosols. The presence of rapidly depositing RGM and coarse particulate Hg may be important sources of Hg input along the Gulf Coast. However, the impact of these species on deposition rates is yet to be determined. ?? 2008.

  3. Sea-level response to atmospheric forcing along the north coast of Persian Gulf

    NASA Astrophysics Data System (ADS)

    Hassanzadeh, S.; Kiasatpour, A.; Hosseinibalam, F.

    2007-02-01

    Data from tide gauges (1990-1999) at Bandar Abbas and Bushehr combined with atmospheric data at both stations are utilized to investigate the mean sea-level (MSL) response to meteorological forcing functions along the north coast of the Persian Gulf. The relations between MSL and forces due to air pressure, air temperature and local wind are examined. The characteristics of variability of each field are analyzed using the spectral analysis method. The annual cycle is dominant in the sea-level, atmospheric pressure, air temperature and wind spectra. The influence of local meteorological functions are quantified using forward stepwise regression techniques. The results suggest that 71.5% and 71.2% variations in the MSL of Bandar Abbas and Bushehr stations are due to meteorological forces at each stations. The model indicates that the most significant influence on the observed variation of MSL at Bandar Abbas is air pressure, while at Bushehr is air temperature. The results of multivariate and simple regression show that these parameters are highly intercorrelated. The sea-level is not significantly correlated with the monthly and winter NAO and Monsoon in the Persian Gulf. The remaining variations are due to density of sea water (steric effect), which has considerable influence on the sea-level variations, and coastal upwelling.

  4. Assessment of the Deepwater Horizon oil spill impact on Gulf coast microbial communities.

    PubMed

    Lamendella, Regina; Strutt, Steven; Borglin, Sharon; Chakraborty, Romy; Tas, Neslihan; Mason, Olivia U; Hultman, Jenni; Prestat, Emmanuel; Hazen, Terry C; Jansson, Janet K

    2014-01-01

    One of the major environmental concerns of the Deepwater Horizon oil spill in the Gulf of Mexico was the ecological impact of the oil that reached shorelines of the Gulf Coast. Here we investigated the impact of the oil on the microbial composition in beach samples collected in June 2010 along a heavily impacted shoreline near Grand Isle, Louisiana. Successional changes in the microbial community structure due to the oil contamination were determined by deep sequencing of 16S rRNA genes. Metatranscriptomics was used to determine expression of functional genes involved in hydrocarbon degradation processes. In addition, potential hydrocarbon-degrading Bacteria were obtained in culture. The 16S data revealed that highly contaminated samples had higher abundances of Alpha- and Gammaproteobacteria sequences. Successional changes in these classes were observed over time, during which the oil was partially degraded. The metatranscriptome data revealed that PAH, n-alkane, and toluene degradation genes were expressed in the contaminated samples, with high homology to genes from Alteromonadales, Rhodobacterales, and Pseudomonales. Notably, Marinobacter (Gammaproteobacteria) had the highest representation of expressed genes in the samples. A Marinobacter isolated from this beach was shown to have potential for transformation of hydrocarbons in incubation experiments with oil obtained from the Mississippi Canyon Block 252 (MC252) well; collected during the Deepwater Horizon spill. The combined data revealed a response of the beach microbial community to oil contaminants, including prevalence of Bacteria endowed with the functional capacity to degrade oil.

  5. Mesoscale eddies and submesoscale structures of Persian Gulf Water off the Omani coast in Spring 2011

    NASA Astrophysics Data System (ADS)

    L'Hégaret, P.; Carton, X.; Louazel, S.; Boutin, G.

    2015-11-01

    The Persian Gulf produces a high salinity water (Persian Gulf Water, PGW hereafter) flowing into the Sea of Oman, in the northwestern Indian Ocean. Past the Strait of Hormuz, the PGW cascades down the continental slope and spreads in the Sea of Oman under the influence of the energetic mesoscale eddies with different thermohaline signatures and pathways depending of the season. In spring 2011, the Phys-Indien experiment was carried out in the Arabian Sea an in the Sea of Oman. This study uses the results from the measurements to characterize the water masses, their thermohaline and dynamical signatures. During the spring intermonsoon, an anticyclonic eddy is often observed at the mouth of the Sea of Oman. This structure was present in 2011 and created a front between the eastern and western part of the basin. As well two energetic gyres were present along the Omani coast in the Arabian Sea. At their peripheries, injections of fresh and cold water are found in relation with the stirring of the eddies. The PGW observed below or between these eddies have a different dilution depending of the position and formation periods of the gyres. Furthermore, in the western Sea of Oman, the PGW is fragmented in filaments and submesoscale eddies. As well, recirculation of the PGW is observed, thus having the presence of salty nearby patches with two densities. Offshore, in the Arabian Sea, a submesoscale lens was recorded. The different mechanisms leading to its formation and presence are assessed here.

  6. Assessment of the Deepwater Horizon oil spill impact on Gulf coast microbial communities

    PubMed Central

    Lamendella, Regina; Strutt, Steven; Borglin, Sharon; Chakraborty, Romy; Tas, Neslihan; Mason, Olivia U.; Hultman, Jenni; Prestat, Emmanuel; Hazen, Terry C.; Jansson, Janet K.

    2014-01-01

    One of the major environmental concerns of the Deepwater Horizon oil spill in the Gulf of Mexico was the ecological impact of the oil that reached shorelines of the Gulf Coast. Here we investigated the impact of the oil on the microbial composition in beach samples collected in June 2010 along a heavily impacted shoreline near Grand Isle, Louisiana. Successional changes in the microbial community structure due to the oil contamination were determined by deep sequencing of 16S rRNA genes. Metatranscriptomics was used to determine expression of functional genes involved in hydrocarbon degradation processes. In addition, potential hydrocarbon-degrading Bacteria were obtained in culture. The 16S data revealed that highly contaminated samples had higher abundances of Alpha- and Gammaproteobacteria sequences. Successional changes in these classes were observed over time, during which the oil was partially degraded. The metatranscriptome data revealed that PAH, n-alkane, and toluene degradation genes were expressed in the contaminated samples, with high homology to genes from Alteromonadales, Rhodobacterales, and Pseudomonales. Notably, Marinobacter (Gammaproteobacteria) had the highest representation of expressed genes in the samples. A Marinobacter isolated from this beach was shown to have potential for transformation of hydrocarbons in incubation experiments with oil obtained from the Mississippi Canyon Block 252 (MC252) well; collected during the Deepwater Horizon spill. The combined data revealed a response of the beach microbial community to oil contaminants, including prevalence of Bacteria endowed with the functional capacity to degrade oil. PMID:24772107

  7. Effect of temperature and salinity on Vibrio (Beneckea) vulnificus occurrence in a Gulf Coast environment.

    PubMed

    Kelly, M T

    1982-10-01

    Vibrio (Beneckea) vulnificus is a recently recognized halophilic organism that may cause serious human infections. Patients infected with V. vulnificus often have a history of exposure to the sea, suggesting that the organism may be a common inhabitant of marine environments. Twenty-one inshore sites around Galveston Island in the Gulf of Mexico were cultured for V. vulnificus over a 12-month period. The organism was recovered from all but one of the sites at some time during the study. It was frequently isolated during the summer and fall from environments of relatively low salinity (7 to 16%). V. vulnificus was rarely isolated from any of the sites during the winter months, when water temperatures dropped below 20 degrees C. In vitro growth characteristics of environmental isolates of V. vulnificus demonstrated salinity optima of 1.0 to 2.0% NaCl and a temperature optimum of 37 degrees C. These growth characteristics may account for the seasonal and geographical variations in occurrence of the organism. Overall, the results of these studies indicate that V. vulnificus is commonly found in Gulf Coast environments and that the occurrence of the organism is favored by warm temperatures and relatively low salinity.

  8. Undiscovered hydrocarbon resources in the U.S. Gulf Coast Jurassic Norphlet and Smackover Formations

    USGS Publications Warehouse

    Pearson, Ofori N.

    2011-01-01

    The U.S. Geological Survey has completed assessments of undiscovered technically recoverable oil and gas resources in the Jurassic Norphlet and Smackover formations of the onshore coastal plain and State waters of the U.S. Gulf Coast. The Norphlet Formation consists of sandstones and interbedded shales and siltstones deposited during a marine transgression. Along its northeast margin, deposition of the Norphlet was in alluvial fans, fluvial systems, and dune and clastic sabkha environments. Mudstones of the underlying Smackover Formation act as source rocks for Norphlet reservoirs. The Norphlet was divided into the following three assessment units (AUs): the Norphlet Salt Basins and Updip AU, the Norphlet Mobile Bay Deep Gas AU, and the Norphlet South Texas Gas AU. The lower part of the Smackover consists primarily of dark carbonate mudstone and argillaceous limestone deposited in low-energy environments, and is one of the Gulf of Mexico Basin’s major source rocks. The upper part of the Smackover is comprised primarily of grain-supported carbonates deposited in high-energy environments. The Smackover was divided into the following four AUs: the Smackover Updip and Peripheral Fault Zone AU, the Smackover Salt Basin AU, the Smackover South Texas AU, and the Smackover Downdip Continuous Gas AU. Although the Norphlet and Smackover formations have been the focus of extensive exploration and production, they probably still contain significant undiscovered oil and gas resources.

  9. New Insight into the Lithosphere Structure of the Gulf Coast of Texas and Louisiana

    NASA Astrophysics Data System (ADS)

    Pulliam, J.; Gurrola, H.; Mickus, K. L.; Keller, G. R.

    2016-12-01

    The Gulf Coast of Texas is a passive margin remaining after the breakup of Pangaea. The opening of the western Gulf of Mexico (GOM) was the result of the Yucatan block rifting away from North America and rotating to its present location but the exact nature of this rifting is not well understood. Some models describe it as passive rifting while other models consider it to be the result of active volcanic rifting. Until recently the sparse distribution of seismic stations limits our ability to image the deep crust and upper mantle that are important to the understanding of important tectonic process of the area. Here we present new observations from passive seismic imaging using data from a broadband 26-station profile across the Gulf Coastal Plain (GCP) and the EarthScope Transportable Array. Ps receiver function (RF) imaging of the GCP profile reveals possible remnants of a subducted slab beneath the GCP of the central Texas coast outboard of the Balcones fault zone. The presence of a remnant late Paleozoic slab associated with the assembly of Pangaea may imply that rifting associated with the opening of the GOM did not completely overprint older features, which suggests that passive rifting was responsible for the opening of western GOM. A remnant slab would provide a plausible explanation for a low velocity layer imaged beneath the coastal region by Sp RF imaging. A strong negative S110p phase observed in an Sp receiver functions image across the GCP of central Texas may be interpreted as the Lithosphere-Asthenosphere boundary (LAB) but observations of other positive and negative phases in the 110 and 200 km depth interval lead us to believe the interval is a semi-ductile region with layered flow. We refer to this interval as a "Lithosphere-Asthenosphere Transition Zone" (LATZ). The LATZ model is supported by observed high P but low S-wave velocities in this depth interval of tomographic models and by SKS analysis that inferred a large amount of anisotropy in

  10. Reconstructing Late Holocene Relative Sea-level Changes on the Gulf Coast of Florida

    NASA Astrophysics Data System (ADS)

    Gerlach, M. J.; Engelhart, S. E.; Kemp, A.; Moyer, R. P.; Smoak, J. M.; Bernhardt, C. E.

    2015-12-01

    Little is known about late Holocene relative sea-level (RSL) along the Gulf Coast of Florida. A RSL reconstruction from this region is needed to fill a spatial gap in sea-level records which can be used to support coastal management, contribute geologic data for Earth-Ice models estimating late Holocene land-level change and serve as the basis for which future projections of sea-level rise must be superimposed. Further, this dataset is crucial to understanding the presence/absence and non-synchronous timing of small sea-level oscillations (e.g. rise at ~ 1000 A.D.; fall at ~ 1400 A.D.) during the past 2000 years on the Atlantic and Gulf Coasts of the United States that may be linked to climate anomalies. We present the results of a high-resolution RSL reconstruction based on the sediment record of two salt marshes on the eastern margin of the Gulf of Mexico. Two ~1.3m cores primarily composed of Juncus roemeranius peat reveal RSL changes over the past ~2000 years in the southern end of Tampa Bay and in Charlotte Harbor, Florida. Two study sites were used to isolate localized factors affecting RSL at either location. Lithostratigraphic analysis at both sites identifies a transition from sandy-silt layers into salt-marsh peat at the bottom of each core. The two records show continuous accumulation of salt-marsh peat with Juncus roemeranius macrofossils and intermittent sand horizons likely reflecting inundation events. We used vertically zoned assemblages of modern foraminifera to assign the indicative meaning. The high marsh is dominated by Ammoastuta inepta, Haplophragmoides wilberti, and Arenoparella mexicana, with low marsh and tidal flats identified by Ammobaculites spp. and Miliammina fusca. Chronologies for these study sites were established using AMS radiocarbon dating of in-situ plant macrofossils, Cs137, Pb210 and pollen and pollution chronohorizons. Our regional RSL curve will add additional data for constraining the mechanisms causing RSL change.

  11. Use of a Florida Gulf Coast Barrier Island by Spring Trans-Gulf Migrants and the Projected Effects of Sea Level Rise on Habitat Availability.

    PubMed

    Lester, Lori A; Gutierrez Ramirez, Mariamar; Kneidel, Alan H; Heckscher, Christopher M

    2016-01-01

    Barrier islands on the north coast of the Gulf of Mexico are an internationally important coastal resource. Each spring hundreds of thousands of Nearctic-Neotropical songbirds crossing the Gulf of Mexico during spring migration use these islands because they provide the first landfall for individuals following a trans-Gulf migratory route. The effects of climate change, particularly sea level rise, may negatively impact habitat availability for migrants on barrier islands. Our objectives were (1) to confirm the use of St. George Island, Florida by trans-Gulf migrants and (2) to determine whether forested stopover habitat will be available for migrants on St. George Island following sea level rise. We used avian transect data, geographic information systems, remote sensing, and simulation modelling to investigate the potential effects of three different sea level rise scenarios (0.28 m, 0.82 m, and 2 m) on habitat availability for trans-Gulf migrants. We found considerable use of the island by spring trans-Gulf migrants. Migrants were most abundant in areas with low elevation, high canopy height, and high coverage of forests and scrub/shrub. A substantial percentage of forest (44%) will be lost by 2100 assuming moderate sea level rise (0.82 m). Thus, as sea level rise progresses, less forests will be available for migrants during stopover. Many migratory bird species' populations are declining, and degradation of barrier island stopover habitat may further increase the cost of migration for many individuals. To preserve this coastal resource, conservation and wise management of migratory stopover areas, especially near ecological barriers like the Gulf of Mexico, will be essential as sea levels rise.

  12. Use of a Florida Gulf Coast Barrier Island by Spring Trans-Gulf Migrants and the Projected Effects of Sea Level Rise on Habitat Availability

    PubMed Central

    Lester, Lori A.; Gutierrez Ramirez, Mariamar; Kneidel, Alan H.; Heckscher, Christopher M.

    2016-01-01

    Barrier islands on the north coast of the Gulf of Mexico are an internationally important coastal resource. Each spring hundreds of thousands of Nearctic-Neotropical songbirds crossing the Gulf of Mexico during spring migration use these islands because they provide the first landfall for individuals following a trans-Gulf migratory route. The effects of climate change, particularly sea level rise, may negatively impact habitat availability for migrants on barrier islands. Our objectives were (1) to confirm the use of St. George Island, Florida by trans-Gulf migrants and (2) to determine whether forested stopover habitat will be available for migrants on St. George Island following sea level rise. We used avian transect data, geographic information systems, remote sensing, and simulation modelling to investigate the potential effects of three different sea level rise scenarios (0.28 m, 0.82 m, and 2 m) on habitat availability for trans-Gulf migrants. We found considerable use of the island by spring trans-Gulf migrants. Migrants were most abundant in areas with low elevation, high canopy height, and high coverage of forests and scrub/shrub. A substantial percentage of forest (44%) will be lost by 2100 assuming moderate sea level rise (0.82 m). Thus, as sea level rise progresses, less forests will be available for migrants during stopover. Many migratory bird species’ populations are declining, and degradation of barrier island stopover habitat may further increase the cost of migration for many individuals. To preserve this coastal resource, conservation and wise management of migratory stopover areas, especially near ecological barriers like the Gulf of Mexico, will be essential as sea levels rise. PMID:26934343

  13. Gulf Coast Subsidence: Crustal Loading, Geodesy, and Recent InSAR and UAVSAR Observations

    NASA Astrophysics Data System (ADS)

    Blom, R. G.; Dokka, R. K.; Fielding, E. J.; Hawkins, B. P.; Hensley, S.; Ivins, E. R.; Jones, C. E.; Lohman, R. B.; Zheng, Y.

    2011-12-01

    The vulnerability of the Gulf Coast has received increasing attention in the years since hurricanes Katrina and Rita. A quantitative geophysical basis for measuring, predicting, and understanding subsidence rates, their geographic distribution, and temporal variability, is necessary for long term protection of lives and property in addition to being a challenging scientific problem. Analysis of historical and continuing geodetic measurements identifies a surprising degree of complexity in subsidence, including regions that are subsiding at rates faster than those considered during planning for hurricane protection of New Orleans and other population centers (http://www.mvn.usace.army.mil/pdf/hps_verticalsettlement.pdf), and for coastal restoration planning for coastal Louisiana (http://www.coast2050.gov/2050reports.htm) (Dokka, 2011, J. Geophys. Res., 116, B06403, doi:10.1029/2010JB008008). Meanwhile, traditional geodetic data provide precise information at single points, InSAR observations provide geographically dense constraints on surface deformation. Available radar data sources include C and L band satellite, and NASA/JPL airborne UAVSAR L band data. The Gulf Coast environment is very challenging for InSAR techniques, especially with systems not designed for interferometry. The shorter wavelength C band data decorrelates over short time periods necessitating more elaborate analysis techniques. We have early results from new persistent scatterer methods and masking techniques to eliminate areas affected by water level changes, all applied to C-band satellite radar data. Limited L-Band ALOS/PALSAR satellite data are available for analysis using conventional interferometry, unfortunately this Japanese satellite system recently failed. Most importantly, we now have airborne UAVSAR repeat pass interferometry data sets spanning a total interval of 514 days (http://uavsar.jpl.nasa.gov/). These data can constrain geophysical models of crustal behavior, leading to

  14. Gulf Coast Subsidence: Integration of Geodesy, Geophysical Modeling, and Interferometric Synthetic Aperture Radar Observations

    NASA Astrophysics Data System (ADS)

    Blom, R. G.; Chapman, B. D.; Deese, R.; Dokka, R. K.; Fielding, E. J.; Hawkins, B.; Hensley, S.; Ivins, E. R.; Jones, C. E.; Kent, J. D.; Liu, Z.; Lohman, R.; Zheng, Y.

    2012-12-01

    The vulnerability of the US Gulf Coast has received increased attention in the years since hurricanes Katrina and Rita. Agencies responsible for the long-term protection of lives and infrastructure require precise estimates of future subsidence and sea level rise. A quantitative, geophysically based methodology can provide such estimates by incorporating geological data, geodetic measurements, geophysical models of non-elastic mechanical behavior at depth, and geographically comprehensive deformation monitoring made possible with measurements from Interferometric Synthetic Aperture Radar (InSAR). To be effective, results must be available to user agencies in a format suitable for integration within existing decision-support processes. Work to date has included analysis of historical and continuing ground-based geodetic measurements. These reveal a surprising degree of complexity, including regions that are subsiding at rates faster than those considered for hurricane protection planning of New Orleans and other coastal communities (http://www.mvn.usace.army.mil/pdf/hps_verticalsettlement.pdf) as well as Louisiana's coastal restoration strategies (http://www.coast2050.gov/2050reports.htm) (Dokka, 2011, J. Geophys. Res., 116, B06403, doi:10.1029/2010JB008008). Traditional geodetic measurements provide precise information at single points, while InSAR observations provide geographically comprehensive measurements of surface deformation at lower vertical precision. Available InSAR data sources include X-, C- and L-band satellite, and NASA/JPL airborne UAVSAR L-band data. The Gulf Coast environment is very challenging for InSAR techniques, especially with systems not designed for interferometry. For example, the shorter wavelength C-band data decorrelates over short time periods requiring more elaborate time-series analysis techniques, with which we've had some success. Meanwhile, preliminary analysis of limited L-Band ALOS/PALSAR satellite data show promise

  15. Land subsidence along the northeastern Texas Gulf coast: Effects of deep hydrocarbon production

    NASA Astrophysics Data System (ADS)

    Sharp, J. M.; Hill, D. W.

    1995-04-01

    The Texas Gulf of Mexico coast is experiencing high (5 11 mm/yr) rates of relative sea level (RSL) rise that are the sum of subsidence and eustatic sea level (ESL) rise. Even higher rates are associated with areas of groundwater pumping from confined aquifers. We investigate the possibility of deep petroleum production as a cause for the high regional rates of subsidence. The northeast Texas coast was chosen for the study because it has a high rate of RSL rise, very limited groundwater production, and a long history of petroleum production. We examine in detail the Big Hill and Fannett fields, for which adequate bottom hole pressure (BHP) and well log data are available. The hypothesis of deep petroleum production is tested in three ways. First, industry BHP tests show many of the fields are depressurized to far below hydrostatic pressures. Second, analysis of BHP data over time in the Big Hill and Fannett fields indicates that some Zones in these fields were below hydrostatic when production commenced. This indicates that depressurization from production in neighboring fields or zones within the same field is not limited to the production zone. Third, three models for subsidence (a general 1-D regional model, an intrareservoir model, and a reservoir bounding layer model), using reasonable hydrogeological parameters, predict subsidence within the inferred range of data. The latter two models use data from the Big Hill and Fannett fields. Additional verification of the hypothesis that deep petroleum production is causing or accelerating regional subsidence will require the collection and analysis of data on the subsurface hydrogeological parameters and detailed measurements of the spatial and temporal distribution of subsidence along the Texas Coast.

  16. Breeding season survival and breeding incidence of female Mottled Ducks on the upper Texas gulf coast

    USGS Publications Warehouse

    Rigby, Elizabeth A.; Haukos, David A.

    2012-01-01

    Previous Mottled Duck (Anas fulvigula) studies suggested that high female breeding season survival may be caused by low nesting effort, but few breeding season estimates of survival associated with nesting effort exist on the western Gulf Coast. Here, breeding season survival (N = 40) and breeding incidence (N = 39) were estimated for female Mottled Ducks on the upper Texas coast, 2006–2008. Females were fitted with backpack radio transmitters and visually relocated every 3–4 days. Weekly survival was estimated using the Known Fate procedure of program MARK with breeding incidence estimated as the annual proportion of females observed nesting or with broods. The top-ranked survival model included a body mass covariate and held weekly female survival constant across weeks and years (SW = 0.986, SE = 0.006). When compared to survival across the entire year estimated from previous band recovery and age ratio analysis, survival rate during the breeding season did not differ. Breeding incidence was well below 100% in all years and highly variable among years (15%–63%). Breeding season survival and breeding incidence were similar to estimates obtained with implant transmitters from the mid-coast of Texas. The greatest breeding incidence for both studies occurred when drought indices indicated average environmental moisture during the breeding season. The observed combination of low breeding incidence and high breeding season survival support the hypothesis of a trade-off between the ecological cost of nesting effort and survival for Mottled Duck females. Habitat cues that trigger nesting are unknown and should be investigated.

  17. Land subsidence along the northeastern Texas Gulf coast: Effects of deep hydrocarbon production

    SciTech Connect

    Sharp, J.M. Jr.; Hill, D.W.

    1995-04-01

    The Texas Gulf of Mexico coast is experiencing high (5-11 mm/yr) rates of relative sea level (RSL) rise that are the sum of subsidence and eustatic sea level (ESL) rise. Even higher rates are associated with areas of ground-water pumping from confined aquifers. We investigate the possibility of deep petroleum production as a cause for the high regional rates of subsidence. The northeast Texas coast was chosen for the study because it has a high rate of RSL rise, very limited groundwater production, and a long history of petroleum production. We examine in detail the Big Hill and Fannett fields, for which adequate bottom hole pressure (BHP) and well log data are available. The hypothesis of deep petroleum production is tested in three ways. First, industry BHP tests show many of the fields are depressurized to far below hydrostatic pressures. Second, analysis of BHP data over time in the Big Hill and Fannett fields indicates that some zones in these fields were below hydrostatic when production commenced. This indicates that depressurization from production in neighboring fields or zones within the same filed is not limited to the production zone. Third, three models for subsidence (a general 1-D regional model, an intra-reservoir model, and a reservoir bounding layer model), using reasonable hydrogeological parameters, predict subsidence within the inferred range of data. The latter two models use data from the Big Hill and Fannett fields. Additional verification of the hypothesis that deep petroleum production is causing or accelerating regional subsidence will require the collection and analysis of data on the subsurface hydrogeological parameters and detailed measure ments of the spatial and temporal distribution of subsidence along the Texas Coast.

  18. Population genetic structure of annual and perennial populations of Zostera marina L. along the Pacific coast of Baja California and the Gulf of California

    USGS Publications Warehouse

    Munoz-Salazar, R.; Talbot, S.L.; Sage, G.K.; Ward, D.H.; Cabello-Pasini, Alejandro

    2005-01-01

    The Baja California peninsula represents a biogeographical boundary contributing to regional differentiation among populations of marine animals. We investigated the genetic characteristics of perennial and annual populations of the marine angiosperm, Zostera marina, along the Pacific coast of Baja California and in the Gulf of California, respectively. Populations of Z. marina from five coastal lagoons along the Pacific coast and four sites in the Gulf of California were studied using nine microsatellite loci. Analyses of variance revealed significant interregional differentiation, but no subregional differentiation. Significant spatial differentiation, assessed using θ values, was observed among all populations within the two regions. Z. marina populations along the Pacific coast are separated by more than 220 km and had the greatest θ (0.13-0.28) values, suggesting restricted gene flow. In contrast, lower but still significant genetic differentiation was observed among populations within the Gulf of California (θ = 0.04-0.18), even though populations are separated by more than 250 km. This suggests higher levels of gene flow among Gulf of California populations relative to Pacific coast populations. Direction of gene flow was predominantly southward among Pacific coast populations, whereas no dominant polarity in the Gulf of California populations was observed. The test for isolation by distance (IBD) showed a significant correlation between genetic and geographical distances in Gulf of California populations, but not in Pacific coast populations, perhaps because of shifts in currents during El Nino Southern Oscillation (ENSO) events along the Pacific coast.

  19. Population genetic structure of annual and perennial populations of Zostera marina L. along the Pacific coast of Baja California and the Gulf of California.

    PubMed

    Muñiz-Salazar, Raquel; Talbot, Sandra L; Sage, George K; Ward, David H; Cabello-Pasini, Alejandro

    2005-03-01

    The Baja California peninsula represents a biogeographical boundary contributing to regional differentiation among populations of marine animals. We investigated the genetic characteristics of perennial and annual populations of the marine angiosperm, Zostera marina, along the Pacific coast of Baja California and in the Gulf of California, respectively. Populations of Z. marina from five coastal lagoons along the Pacific coast and four sites in the Gulf of California were studied using nine microsatellite loci. Analyses of variance revealed significant interregional differentiation, but no subregional differentiation. Significant spatial differentiation, assessed using theta(ST) values, was observed among all populations within the two regions. Z. marina populations along the Pacific coast are separated by more than 220 km and had the greatest theta(ST) (0.13-0.28) values, suggesting restricted gene flow. In contrast, lower but still significant genetic differentiation was observed among populations within the Gulf of California (theta(ST) = 0.04-0.18), even though populations are separated by more than 250 km. This suggests higher levels of gene flow among Gulf of California populations relative to Pacific coast populations. Direction of gene flow was predominantly southward among Pacific coast populations, whereas no dominant polarity in the Gulf of California populations was observed. The test for isolation by distance (IBD) showed a significant correlation between genetic and geographical distances in Gulf of California populations, but not in Pacific coast populations, perhaps because of shifts in currents during El Niño Southern Oscillation (ENSO) events along the Pacific coast.

  20. Statistical modeling of geopressured geothermal reservoirs

    NASA Astrophysics Data System (ADS)

    Ansari, Esmail; Hughes, Richard; White, Christopher D.

    2017-06-01

    Identifying attractive candidate reservoirs for producing geothermal energy requires predictive models. In this work, inspectional analysis and statistical modeling are used to create simple predictive models for a line drive design. Inspectional analysis on the partial differential equations governing this design yields a minimum number of fifteen dimensionless groups required to describe the physics of the system. These dimensionless groups are explained and confirmed using models with similar dimensionless groups but different dimensional parameters. This study models dimensionless production temperature and thermal recovery factor as the responses of a numerical model. These responses are obtained by a Box-Behnken experimental design. An uncertainty plot is used to segment the dimensionless time and develop a model for each segment. The important dimensionless numbers for each segment of the dimensionless time are identified using the Boosting method. These selected numbers are used in the regression models. The developed models are reduced to have a minimum number of predictors and interactions. The reduced final models are then presented and assessed using testing runs. Finally, applications of these models are offered. The presented workflow is generic and can be used to translate the output of a numerical simulator into simple predictive models in other research areas involving numerical simulation.

  1. Quality and freezing qualities of first and second ejaculates collected from endangered Gulf Coast Native rams.

    PubMed

    Nel-Themaat, L; Harding, G D; Chandler, J E; Chenevert, J F; Damiani, P; Fernandez, J M; Humes, P E; Pope, C E; Godke, R A

    2006-10-01

    The Gulf Coast Native sheep, or Louisiana Native sheep, is an endangered previously feral domestic sheep population of European origin that has been under natural selection pressure for reproductive survival in their transplanted range while roaming in the southern Gulf Coast Region of the United States. This sheep population has an increased natural resistance to internal parasites, breeds year-around and has a greater percentage of live lambs as compared with other breeds of sheep raised in similar environments. To preserve the genetic diversity of this important feral sheep population, semen was collected by electro-ejaculation and subjected to cryopreservation for subsequent storage in a genome resource bank. Unrelated rams (n=5) were collected 3 days-a-week, allowing at least 2 days of rest between collections. Two ejaculates were obtained from each ram per collection day, with the second collection conducted 10min after the first ejaculation. Semen was processed using the standard Salamon cryopreservation procedure in a Tris-yolk-glycerol extender, frozen in 0.5ml plastic straws using liquid nitrogen (LN(2)) vapor and stored in LN(2). Each ejaculate was evaluated for volume, sperm concentration/ml (x10(9)/ml), number of spermatozoa/ejaculate (x10(9)), sperm progressive motility (%) for pre-cooled semen, cooled semen and semen after thawing. For the five rams, each semen variable for the first ejaculate was compared with that of the second ejaculate collected 10min later. The mean semen volume, sperm concentration and number of spermatozoa per ejaculate obtained from the first ejaculate were significantly greater (P< or =0.01) than those of the second ejaculate (comparisons being 1.62 and 1.06; 3.2 and 1.5; 5.4 and 1.8, respectively). Overall, the mean motility of pre-cooled (22 degrees Celsius), cooled (5 degrees Celsius) and frozen (-196 degrees Celsius) post-thawed spermatozoa was less (P< or =0.01) in the first ejaculate (71.5, 64.8 and 34.1%, respectively

  2. Mesoscale eddies and submesoscale structures of Persian Gulf Water off the Omani coast in spring 2011

    NASA Astrophysics Data System (ADS)

    L'Hégaret, Pierre; Carton, Xavier; Louazel, Stephanie; Boutin, Guillaume

    2016-05-01

    The Persian Gulf produces high-salinity water (Persian Gulf Water, PGW hereafter), which flows into the Sea of Oman via the Strait of Hormuz. Beyond the Strait of Hormuz, the PGW cascades down the continental slope and spreads in the Sea of Oman under the influence of the energetic mesoscale eddies. The PGW outflow has different thermohaline characteristics and pathways, depending on the season. In spring 2011, the Phys-Indien experiment was carried out in the Arabian Sea and in the Sea of Oman. The Phys-Indien 2011 measurements, as well as satellite observations, are used here to characterize the circulation induced by the eddy field and its impact on the PGW pathway and evolution. During the spring intermonsoon, an anticyclonic eddy is often observed at the mouth of the Sea of Oman. It creates a front between the eastern and western parts of the basin. This structure was observed in 2011 during the Phys-Indien experiment. Two energetic eddies were also present along the southern Omani coast in the Arabian Sea. At their peripheries, ribbons of freshwater and cold water were found due to the stirring created by the eddies. The PGW characteristics are strongly influenced by these eddies. In the western Sea of Oman, in 2011, the PGW was fragmented into filaments and submesoscale eddies. It also recirculated locally, thus creating salty layers with different densities. In the Arabian Sea, a highly saline submesoscale lens was recorded offshore. Its characteristics are analyzed here and possible origins are proposed. The recurrence of such lenses in the Arabian Sea is also briefly examined.

  3. Fatty acid composition of fourteen seashore mallow (Kosteletzkya pentacarpos) seed oil accessions collected from the Atlantic and Gulf coasts of the United States

    USDA-ARS?s Scientific Manuscript database

    Seashore mallow (Kosteletzkya pentacarpos) is a flowering perennial halophytic herb belonging to the family Malvaceae that is found in marshes along the Atlantic and Gulf coasts of the United States. Fourteen accessions were collected from wild populations along the Atlantic (n = 8) and Gulf (n = 6)...

  4. Impact of induced seismic events on seal integrity, Texas Gulf Coast

    DOE PAGES

    Nicot, Jean-Philippe; Meckel, Timothy A.; Carr, David A.; ...

    2014-12-31

    Recent publications have suggested that large-scale CO2 injection could trigger earthquakes and that even small- to moderate-sized earthquakes may threaten the seal integrity of the injection zone, and potentially damage buildings and other surface structures. In this study, we compared seal thickness to estimated fault displacement due to a single hypothetical seismic event in a selected area of the Texas Gulf Coast comprising an offshore strip of state waters along two Texas counties. To evaluate the slip generated by a single seismic event, we compiled well log information on shale/sand sequences and seismic information on fault geometric characteristics of amore » section of Lower Miocene age. The section is thousands of feet thick and is overlain and underlain by marine shales (Amph. B and Anahuac, respectively) that are relatively easy to correlate between wells. The Amph. B. shale is the secondary and ultimate seal for all injection intervals in the Lower Miocene. Given its thickness, no realistic seismic event or small series of seismic events will offset it significantly. However, this may not be true of smaller local primary seals. An analysis of geophysical logs of a total of 71 wells yielded a total of 2,871 sand / shale binary intervals. An analysis of the dedicated 3D seismic survey counted 723 fault traces at five roughly horizontal horizons within the Lower Miocene Fault displacement estimated using the product of the fault length times an uncertain multiplier coefficient assumed to follow a triangular distribution with a 10-3 to 10-5 range and a mode of 8 × 10-5. We then compared estimated single-event fault displacements to seal thicknesses by means of a Monte-Carlo analysis. Only 1.8% of thickness/displacement pairs display a displacement greater than 20% of the seal thickness. Only 0.26% of the pairs result in a displacement of half the seal thickness and only 0.05% of thickness/displacement pairs result in a clear seal rupture. The next step

  5. Impact of induced seismic events on seal integrity, Texas Gulf Coast

    SciTech Connect

    Nicot, Jean-Philippe; Meckel, Timothy A.; Carr, David A.; Oldenburg, Curtis M.

    2014-12-31

    Recent publications have suggested that large-scale CO2 injection could trigger earthquakes and that even small- to moderate-sized earthquakes may threaten the seal integrity of the injection zone, and potentially damage buildings and other surface structures. In this study, we compared seal thickness to estimated fault displacement due to a single hypothetical seismic event in a selected area of the Texas Gulf Coast comprising an offshore strip of state waters along two Texas counties. To evaluate the slip generated by a single seismic event, we compiled well log information on shale/sand sequences and seismic information on fault geometric characteristics of a section of Lower Miocene age. The section is thousands of feet thick and is overlain and underlain by marine shales (Amph. B and Anahuac, respectively) that are relatively easy to correlate between wells. The Amph. B. shale is the secondary and ultimate seal for all injection intervals in the Lower Miocene. Given its thickness, no realistic seismic event or small series of seismic events will offset it significantly. However, this may not be true of smaller local primary seals. An analysis of geophysical logs of a total of 71 wells yielded a total of 2,871 sand / shale binary intervals. An analysis of the dedicated 3D seismic survey counted 723 fault traces at five roughly horizontal horizons within the Lower Miocene Fault displacement estimated using the product of the fault length times an uncertain multiplier coefficient assumed to follow a triangular distribution with a 10-3 to 10-5 range and a mode of 8 × 10-5. We then compared estimated single-event fault displacements to seal thicknesses by means of a Monte-Carlo analysis. Only 1.8% of thickness/displacement pairs display a displacement greater than 20% of the seal thickness. Only 0.26% of the pairs result in a displacement of half the seal thickness and only 0.05% of thickness/displacement pairs result in

  6. Hazards of Gulf Coast Subsidence: Crustal Loading, Geodesy, InSAR and UAVSAR Observations

    NASA Astrophysics Data System (ADS)

    Blom, R. G.; Chapman, B. D.; Dokka, R. K.; Fielding, E. J.; Hensley, S.; Ivins, E. R.; Lohman, R. B.

    2009-12-01

    Hurricanes Katrina and Rita focused attention on the vulnerability of the U.S. Gulf Coast. Significant improvement in geophysical understanding of subsidence rates, temporal variability, and geographic distribution is not only an interesting scientific challenge, it is necessary for long term protection of lives and property. An integrated geophysical approach using precise and accurate geodetic measurements is the only way to gain physical insight into the myriad of possible processes at work and provide accurate predictions of future subsidence rates. In particular, southeast Louisiana is a Holocene landscape built on a coastal delta created by the Mississippi River during the past ~8,000 years as sea level rise slowed. Prior to human intervention natural subsidence was offset by sediment deposition by the Mississippi River during floods, and in situ organic sediment production in marshes. Currently, several processes have been documented to contribute to subsidence, including wetland loss due to lack of present day sediment flux, land subsidence due to sediment compaction, sediment oxidation, fluid withdrawal, salt evacuation, tectonics, and also crustal loading. One of the least studied subsidence driving phenomena is the effect of crustal loading due to Mississippi River sediments, and the geologically recent ~130 m (427 ft.) rise in sea level. We model subsidence rates expected from these loads using geophysical methods developed for post-glacial rebound. Our model predicted, and geodetically observed, vertical subsidence rates vary between 2 - 8 mm per year over areas of 30,000 to 750 square kilometers, respectively. This viscoelastic flexure is the background crustal deformation field, upon which larger amplitude, but smaller spatial scale, subsidence occurs due to other factors. We are extending subsidence measurements from traditional geodetic techniques (including GPS), to geographically comprehensive measurements derived from synthetic aperture radar

  7. Monitoring of fogwater chemistry in the gulf coast urban industrial corridor: Baton Rouge (louisiana).

    PubMed

    Raja, S; Ravikrishna, R; Kommalapati, R R; Valsaraj, K T

    2005-11-01

    Seventeen fog events were sampled in Baton Rouge, Louisiana during 2002-2004 as part of characterizing wet deposition by fogwater in the heavily industrialized corridor along the Louisiana Gulf Coast in the United States. These samples were analyzed for chemical characteristics such as pH, conductivity, total organic and inorganic carbon, total metals and the principal ion concentrations. The dominant ionic species in all samples were NH4+, NO3-, Cl- and SO4(2-). The pH of the fogwater sampled had a mean value of 6.7 with two cases of acidic pH of 4.7. Rainwater and fogwater pH were similar in this region. The acidity of fogwater was a result of NO3- but partly offset by high NH4+. The measured gaseous SO2 accounted for a small percentage of the observed sulfate concentration, indicating additional gas-to-particle conversion of SO2 to sulfate in fogwater. The gaseous NOx accounted for most of the dissolved nitrate and nitrite concentration in fogwater. The high chloride concentration was attributable to the degradation of chlorinated organics in the atmosphere. The metal composition was traced directly to soil-derived aerosol precursors in the air. The major metals observed in fogwater were Na, K, Ca, Fe, Al, Mg and Zn. Of these Na, K, Ca and Mg were predominant with mean concentrations > 100 microM. Al, Fe and Zn were present in the samples, at mean concentrations < 100 microM. Small concentrations of Mn (7.8 microM), Cu (2 microM), Pb (0.07 microM) and As (0.32 microM) were also observed in the fogwaters, and these were shown to result from particulates (PM2.5) in the atmosphere. The contribution to both ions and metals from the marine sources in the Louisiana Gulf Coast was minimal. The concentrations of all principal ionic species and metals in fogwater were 1-2 orders of magnitude larger than in rainwater. Several linear alkane organic compounds were observed in the fogwater, representing the contributions from petroleum products at concentrations far

  8. Environmental Relationship of Benthic Fauna in the Near Shore Waters off Gulf of Kutch, North West Coast of India

    NASA Astrophysics Data System (ADS)

    Sanagoudra, S. N.; Bhat, U. G.

    2014-12-01

    The present study was undertaken for a period of two years from December 2010 to May 2012.Studying the benthos of Gulf of Kutch near shore waters is also useful in understanding changes in biological diversity of Gujarat coast. The use of benthos in aquatic ecological research is especially effective in assessing long term changes and detecting input from diffuse sources. The benthos reflects the effects organic enrichment by responding through detectable changes in population dynamics on a time scale of months to years. This is in contrast to plankton which shows a more immediate change to point sources with no long term consequences to the populations (Gray et al 1992). Benthoses were collected from 6 stations on regular basis and were identified. Altogether 60 species belonging to 39 families were identified and placed taxonomically during the course of investigation with sediment samples. Benthic environmental relationship species were observed and recorded. Our studies of monthly comparisons have become an interesting and popular approach in ecology and environmental relationships in the past a number of studies have been conducted on the ecology of macro benthic populations of Gulf of Kutch near shore. My research helps in Gulf of Kutch of the west coast of India has become an important economic asset of the country serving commercial navigation and the fishing sector with environmental relation of benthos in the Gulf of Kutch Gujarat. India.

  9. Trace element concentrations in surface estuarine and marine sediments along the Mississippi Gulf Coast following Hurricane Katrina.

    PubMed

    Warren, Crystal; Duzgoren-Aydin, Nurdan S; Weston, James; Willett, Kristine L

    2012-01-01

    Hurricanes are relatively frequent ecological disturbances that may cause potentially long-term impacts to the coastal environment. Hurricane Katrina hit the Mississippi Gulf Coast in August 2005, and caused a storm surge with the potential to change the trace element content of coastal surface sediments. In this study, surface estuarine and marine sediments were collected monthly following the storm from ten sites along the Mississippi Gulf Coast (Mobile Bay, Grand Bay Bayous Heron and Cumbest, Pascagoula, Ocean Springs, Biloxi Gulf, Back Biloxi Bay, Gulfport Gulf, Gulfport Courthouse Rd, and Gulfport Marina). Concentrations of V, Cr, Mn, Fe, Co, Ni, Zn, As, Cd, and Pb were measured by inductively coupled plasma-mass spectrometry to evaluate their temporal and spatial variations in the year following Hurricane Katrina. Sediments were characterized by pH, particle size distribution and total carbon and nitrogen content. Trace element contents of the sediments were determined in both <2 mm and <63 μm grain size fractions. Results revealed no significant temporal and spatial variability in trace element concentrations, in either size fraction. Potential ecological risk of the sediments was assessed by using NOAA SQuiRTs' guideline values; most concentrations remained below probable adverse effects guidelines to marine organisms suggesting that trace elements redistributed by Hurricane Katrina would not cause an adverse impact on resident organisms. Instead, the concentrations of trace elements were site-dependent, with specific contaminants relating to the use of the area prior to Hurricane Katrina.

  10. Hurricane Frederic tidal floods of September 12-13, 1979, along the Gulf Coast, Gulf Shores quadrangle, Alabama

    USGS Publications Warehouse

    Scott, John C.; Bohman, Larry R.

    1980-01-01

    Shown on the Gulf Shores topographic map are floodmark elevations and approximate areas flooded by Hurricane Frederic tides of September 12-13, 1979, along the shores of the Gulf of Mexico, Oyster Bay, and the Bon Secour River, in Alabama. Most beachfront homes in the Gulf Shores area and most homes fronting on Little Lagoon in western Gulf Shores were either destroyed or heavily damaged. All beachfront motels were severly damaged. Damage to homes and other buildings in the Oyster Bay-Bon Secour area was not as great. Storm-tide frequency and records of annual maximum tides at Mobile, Ala., since 1772, are presented. Offshore winds reached about 160 miles per hour. A wind-velocity of about 145 miles per hour was recorded near Dauphin Island, Ala. (USGS)

  11. The Contribution of Mangrove Expansion to Salt Marsh Loss on the Texas Gulf Coast

    PubMed Central

    Brody, Samuel D.; Louchouarn, Patrick

    2015-01-01

    Landscape-level shifts in plant species distribution and abundance can fundamentally change the ecology of an ecosystem. Such shifts are occurring within mangrove-marsh ecotones, where over the last few decades, relatively mild winters have led to mangrove expansion into areas previously occupied by salt marsh plants. On the Texas (USA) coast of the western Gulf of Mexico, most cases of mangrove expansion have been documented within specific bays or watersheds. Based on this body of relatively small-scale work and broader global patterns of mangrove expansion, we hypothesized that there has been a recent regional-level displacement of salt marshes by mangroves. We classified Landsat-5 Thematic Mapper images using artificial neural networks to quantify black mangrove (Avicennia germinans) expansion and salt marsh (Spartina alterniflora and other grass and forb species) loss over 20 years across the entire Texas coast. Between 1990 and 2010, mangrove area grew by 16.1 km2, a 74% increase. Concurrently, salt marsh area decreased by 77.8 km2, a 24% net loss. Only 6% of that loss was attributable to mangrove expansion; most salt marsh was lost due to conversion to tidal flats or water, likely a result of relative sea level rise. Our research confirmed that mangroves are expanding and, in some instances, displacing salt marshes at certain locations. However, this shift is not widespread when analyzed at a larger, regional level. Rather, local, relative sea level rise was indirectly implicated as another important driver causing regional-level salt marsh loss. Climate change is expected to accelerate both sea level rise and mangrove expansion; these mechanisms are likely to interact synergistically and contribute to salt marsh loss. PMID:25946132

  12. The contribution of mangrove expansion to salt marsh loss on the Texas Gulf Coast.

    PubMed

    Armitage, Anna R; Highfield, Wesley E; Brody, Samuel D; Louchouarn, Patrick

    2015-01-01

    Landscape-level shifts in plant species distribution and abundance can fundamentally change the ecology of an ecosystem. Such shifts are occurring within mangrove-marsh ecotones, where over the last few decades, relatively mild winters have led to mangrove expansion into areas previously occupied by salt marsh plants. On the Texas (USA) coast of the western Gulf of Mexico, most cases of mangrove expansion have been documented within specific bays or watersheds. Based on this body of relatively small-scale work and broader global patterns of mangrove expansion, we hypothesized that there has been a recent regional-level displacement of salt marshes by mangroves. We classified Landsat-5 Thematic Mapper images using artificial neural networks to quantify black mangrove (Avicennia germinans) expansion and salt marsh (Spartina alterniflora and other grass and forb species) loss over 20 years across the entire Texas coast. Between 1990 and 2010, mangrove area grew by 16.1 km(2), a 74% increase. Concurrently, salt marsh area decreased by 77.8 km(2), a 24% net loss. Only 6% of that loss was attributable to mangrove expansion; most salt marsh was lost due to conversion to tidal flats or water, likely a result of relative sea level rise. Our research confirmed that mangroves are expanding and, in some instances, displacing salt marshes at certain locations. However, this shift is not widespread when analyzed at a larger, regional level. Rather, local, relative sea level rise was indirectly implicated as another important driver causing regional-level salt marsh loss. Climate change is expected to accelerate both sea level rise and mangrove expansion; these mechanisms are likely to interact synergistically and contribute to salt marsh loss.

  13. Antioxidant Properties of two Edible Green Seaweeds From Northern Coasts of the Persian Gulf

    PubMed Central

    Farasat, Massoumeh; Khavari-Nejad, Ramazan-Ali; Nabavi, Seyed Mohammad Bagher; Namjooyan, Foroogh

    2013-01-01

    Background Ulva genus, an edible seaweed, and an important food source in many south-east Asian countries is also recognized by its synonymous name as Enteromorpha. Objectives This study was carried out to evaluate antioxidant activity, contents of total phenolics, and flavonoids of methanolic extracts of edible green seaweeds including Ulva clathrata (Roth) C. Agardh and three samples of Ulva prolifera O.F.Müller grown at different parts of Bushehr Province along the northern coasts of the Persian Gulf. Materials and Methods The seaweeds were collected from Bordekhoun, Northern Ouli, Taheri and Kangan coasts in December 2011. Methanolic extracts of the seaweeds were assessed for their antioxidant activity using DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging assay and was performed in a microplate reader. Total phenolics were determined by Folin-Ciocalteu reagent and flavonoid content was evaluated by colorimetric method. Results All samples showed antioxidant activity to various degrees. Ulva clathrata exhibited a high DPPH radical scavenging activity with a low IC50 (the half-maximal inhibitory concentration) (0.715 ± 0.078 mg. mL-1). The highest phenolic content (4.468 ± 0.379 mg GAE g-1) (gallic acid equivalent) and flavonoid content (45.577 ± 0.949 mg RE g-1) (rutin equivalent) were also observed in U .clathrata. The phenolic and flavonoid contents showed positive correlations with the DPPH radical scavenging activity and negative correlations with IC50 (P < 0.01). Besides, Results showed that there was a positive correlation between total phenolics and flavonoid content of extracts (P < 0.01). Conclusions Strong positive and significant correlations between DPPH radical scavenging and phenolic and flavonoid contents showed that, phenolic compounds, including flavonoids are the main contributors of antioxidant activity in these Ulva species and variations in phenolics and flavonoid contents of the seaweed extracts may be due to the variation in

  14. Land Surface Data Assimilation and the Northern Gulf Coast Land/Sea Breeze

    NASA Technical Reports Server (NTRS)

    Lapenta, William M.; Blackwell, Keith; Suggs, Ron; McNider, Richard T.; Jedlovec, Gary; Kimball, Sytske; Arnold, James E. (Technical Monitor)

    2002-01-01

    A technique has been developed for assimilating GOES-derived skin temperature tendencies and insolation into the surface energy budget equation of a mesoscale model so that the simulated rate of temperature change closely agrees with the satellite observations. A critical assumption of the technique is that the availability of moisture (either from the soil or vegetation) is the least known term in the model's surface energy budget. Therefore, the simulated latent heat flux, which is a function of surface moisture availability, is adjusted based upon differences between the modeled and satellite observed skin temperature tendencies. An advantage of this technique is that satellite temperature tendencies are assimilated in an energetically consistent manner that avoids energy imbalances and surface stability problems that arise from direct assimilation of surface shelter temperatures. The fact that the rate of change of the satellite skin temperature is used rather than the absolute temperature means that sensor calibration is not as critical. The sea/land breeze is a well-documented mesoscale circulation that affects many coastal areas of the world including the northern Gulf Coast of the United States. The focus of this paper is to examine how the satellite assimilation technique impacts the simulation of a sea breeze circulation observed along the Mississippi/Alabama coast in the spring of 2001. The technique is implemented within the PSU/NCAR MM5 V3-4 and applied on a 4-km domain for this particular application. It is recognized that a 4-km grid spacing is too coarse to explicitly resolve the detailed, mesoscale structure of sea breezes. Nevertheless, the model can forecast certain characteristics of the observed sea breeze including a thermally direct circulation that results from differential low-level heating across the land-sea interface. Our intent is to determine the sensitivity of the circulation to the differential land surface forcing produced via the

  15. Satellite Sees Tropical Storm Isaac Headed for Landfall on U.S. Gulf Coast

    NASA Image and Video Library

    An animation of satellite observations from August 26-28, 2012 shows Tropical Storm Isaac moving past the Florida Keys and into the Gulf of Mexico, nearing landfall in the U.S. Gulf states. This vi...

  16. Search behavior of arboreal insectivorous migrants at gulf coast stopover sites in spring

    USGS Publications Warehouse

    Chen, Chao-Chieh; Barrow, W.C.; Ouchley, K.; Hamilton, R.B.

    2011-01-01

    Search behavior of arboreal insectivorous migrants was studied at three stopover sites along the northern coast of the Gulf of Mexico during spring migrations, 1993–1995. We examined if search behavior was affected by phylogeny, or by environmental factors. A sequence of search movements (hop, flutter, or flight) in a foraging bout was recorded for each migrant encountered. Search rate, frequency, and distance of movements were calculated for each species. Search rate was positively correlated with proportion of hop, but negatively correlated to flight distance. Hop distance was positively correlated to tarsus length, as was flight distance to wing length for the 31 species of migrants. Cluster analysis indicated closely related species generally have similar foraging modes, which range from “sit-and-wait” of flycatchers to “widely foraging” of warblers. Migrants tended to use more hops in dense vegetation, but more flights in areas with sparse vegetation. Migrants also used more flights when foraging in mixed-species flocks and during periods of high migrant density. Logistic models indicated warblers were more influenced by environmental factors than vireos, possibly because warblers are near-perch searchers and more affected by these factors.

  17. Assessing Hurricane Katrina Damage to the Mississippi Gulf Coast Using IKONOS Imagery

    NASA Technical Reports Server (NTRS)

    Spruce, Joseph; McKellip, Rodney

    2006-01-01

    Hurricane Katrina hit southeastern Louisiana and the Mississippi Gulf Coast as a Category 3 hurricane with storm surges as high as 9 m. Katrina devastated several coastal towns by destroying or severely damaging hundreds of homes. Several Federal agencies are assessing storm impacts and assisting recovery using high-spatial-resolution remotely sensed data from satellite and airborne platforms. High-quality IKONOS satellite imagery was collected on September 2, 2005, over southwestern Mississippi. Pan-sharpened IKONOS multispectral data and ERDAS IMAGINE software were used to classify post-storm land cover for coastal Hancock and Harrison Counties. This classification included a storm debris category of interest to FEMA for disaster mitigation. The classification resulted from combining traditional unsupervised and supervised classification techniques. Higher spatial resolution aerial and handheld photography were used as reference data. Results suggest that traditional classification techniques and IKONOS data can map wood-dominated storm debris in open areas if relevant training areas are used to develop the unsupervised classification signatures. IKONOS data also enabled other hurricane damage assessment, such as flood-deposited mud on lawns and vegetation foliage loss from the storm. IKONOS data has also aided regional Katrina vegetation damage surveys from multidate Land Remote Sensing Satellite and Moderate Resolution Imaging Spectroradiometer data.

  18. Fogwater Chemistry and Air Quality in the Texas-Louisiana Gulf Coast Corridor

    NASA Astrophysics Data System (ADS)

    Kommalapati, R. R.; Raja, S.; Ravikrishna, R.; Murugesan, K.; Collett, J. L.; Valsaraj, K.

    2007-05-01

    The presence of fog water in polluted atmosphere can influence atmospheric chemistry and air quality. The study of interactions between fog water and atmospheric gases and aerosols are very important in understanding the atmospheric fate of the pollutants. In this Study several air samples and fogwater samples were collected in the heavily industrialized area of Gulf Coast corridor( Houston, TX and Baton Rouge, LA). A total of 32 fogwater samples were collected, comprising of nine fog events in Baton Rouge (Nov 2004 to Feb 2005) and two fog events in Houston (Feb, 2006), during the fog sampling campaigns. These samples were analyzed for pH, total and dissolved carbon, major inorganic ions, organic acids, and aromatics, aldehydes, VOCs, and linear alkanes organic compounds. Fogwater samples collected in Houston show clear influence of marine and anthropogenic environment, while Baton Rouge samples reveal a relatively less polluted environment. Also, a time series observation of air samples indicated that fog event at the monitoring site impacted the air concentrations of the pollutants. This is attributed to presence of surface active organic matter in fog water.

  19. Injuries after Hurricane Katrina among Gulf Coast Evacuees sheltered in Houston, Texas.

    PubMed

    Faul, Mark; Weller, Nancy F; Jones, Julie A

    2011-09-01

    After Hurricane Katrina and a decline in the living conditions at a major temporary shelter in New Orleans, Louisiana, residents were offered transport to a Mega-Shelter in Houston, Texas. Approximately 200,000 Gulf Coast residents were transported to Houston's Astrodome/Reliant Center Complex for appropriate triage and transfer to other shelter facilities. The Katrina Clinic was quickly organized to treat evacuees with acute injuries and illnesses as well as chronic medical conditions. Clinic physicians documented 1130 hurricane-related injuries during Katrina Clinic's operational interval, September 1-22, 2005. This article documents the nature, extent, and location of injuries treated at that clinic. We compare the frequency of injury among Katrina evacuees who visited the clinic to that of injuries among clinic outpatient records recorded in a nationally representative database. Using the Barell Matrix system and codes from the International Classification of Diseases, Ninth Revision, we classify Katrina injuries by body region and nature of injury; we also document the large number of hurricane-related immunizations distributed at the temporary outpatient clinic. The results show a 42% higher injury proportion among Katrina evacuees and that approximately half of all of the evacuees required immunizations. Lower leg extremity injuries were among the most frequent injuries. Future planning for hurricanes should take into account nonfatal injuries requiring medical treatment and other supportive care. Copyright © 2011 Emergency Nurses Association. Published by Mosby, Inc. All rights reserved.

  20. Offshore Transport of Sediment During Cyclonic Storms: Hurricane Ike (2008), Texas Gulf Coast, USA

    NASA Astrophysics Data System (ADS)

    Goff, J. A.; Allison, M. A.; Gulick, S. P.

    2009-12-01

    Extreme storms can have a large impact on coastal sediment budgets, and the character of strata preserved in the geologic record. Here we investigate the impact of a cyclonic storm surge flood and ebb on sediment transport in a microtidal beach barrier-shelf system. Hurricane Ike made landfall on the Texas (US) coast on September 13, 2008. The accompanying storm surge flooded Galveston Bay with up to 5 m of water above sea level. The surge flood and ebb preferentially flowed over the low-elevation, bay fronting spit Bolivar Peninsula, destroying buildings and eroding the sediments. Surge waters also flowed through Bolivar Roads tidal inlet, the main passageway between the Gulf and the Bay through the barrier system. Bathymetry, CHIRP data and samples were collected in Bolivar Roads 9-10 days after the storm, and are compared to data collected four months prior. Additional data were collected offshore of Bolivar Peninsula in October, 2008. Our results document the dominance of the storm surge ebb in forcing sediment transport through the inlet, which is not considered in models of beach barrier evolution. Shoreface sands appear to have been incised by the storm, and advected with beach barrier sediments sufficiently offshore by the storm surge ebb that they cannot be reincorporated, indicating a significant loss to the barrier system’s sediment budget as a result of a single storm.

  1. Bioavailable trace metals in micro-tidal Thambraparani estuary, Gulf of Mannar, SE coast of India

    NASA Astrophysics Data System (ADS)

    Jayaprakash, M.; Viswam, Arya; Gopal, V.; Muthuswamy, S.; Kalaivanan, P.; Giridharan, L.; Jonathan, M. P.

    2014-06-01

    Thirty surface sediment samples from two different seasons pre-monsoon (PRM), post-monsoon (POM) were analyzed for texture, carbonates, organic matter (OM) and leachable trace metals (LTMs) (Fe, Mn, Cr, Cu, Ni, Pb, Zn, Cd) from the micro-tidal estuary of Thambraparani river located in Gulf of Mannar, SE coast of India. Finer fractions (mud: 3-87%) and OM (2.6-8.0%) dominate the region and the concentration pattern of LTMs indicate that mostly all the metals are concentrated in the POM season than PRM. Correlation analysis indicates that LTMs are also bound with the OM, mud and are bound with Fe-Mn oxides. Pb concentration (14-103 μg g-1) exceeds the sediment quality guideline value indicating its anthropogenic origin. Low flow condition exists in the estuarine region due to the control over fresh water inflow in the upstream side and the higher concentration of metals [avg. (μg g-1) Cr 10; Cu 11; Zn 28] is due to the precipitation from estuarine water to the sediments and is also bioavailable to the marine biota in the region.

  2. Oil and gas developments in Upper Gulf Coast of Texas in 1984

    SciTech Connect

    Cook, T.R.; Lanigan, J.C.

    1985-10-01

    Wells drilled in the Upper Gulf Coast of Texas during 1984 totaled 1,973, almost the same as 1983's total of 1,979 wells. Onshore exploratory drilling continued to decrease, with 329 wildcats drilled compared to 426 in 1983 and 505 in 1982. Development drilling accounted for 83% of all onshore wells, up 6% from the 2 previous years. There were 36 new-field discoveries in 1984 with an average depth of 10,163 ft and a success rate of 20%. The 96 other exploratory discoveries had a success rate of 64%. The Oligocene trend was the most active, with 43% of the wildcat drilling, followed by the Eocene trend, with 39%. Offshore exploratory drilling was up sharply from 1983. A total of 57 wildcats were completed during 1984, up from 37 in 1983. Seven wildcats were successful gas completions for a 12% success rate (there were no oil completions). An additional 38 wildcats drilled during 1984 were classified as ''suspended'' at year end. Onshore geophysical activity increased in 1984 to 937 crew-weeks from 1983's 894 crew-weeks. Offshore activity hit an all-time high for the third consecutive year with 317.5 crew-weeks.

  3. Oil and gas developments in Upper Gulf Coast of Texas in 1982

    SciTech Connect

    Finneran, J.M.; Everse, D.G.

    1983-10-01

    There were 2,412 wells drilled in the Upper Gulf Coast of Texas during 1982, a slight decrease (4%) from the 1981 total of 2,502. Onshore exploratory drilling decreased 14%, with 505 wildcats drilled in 1982 compared with 581 in 1981. Development drilling accounted for 79% of the total. With the 1,907 wells drilled in 1982 showing little change from the 1,918 development wells drilled in 1981. There were 55 new-field discoveries completed with an average depth of 9,431 ft and a success rate of 18.5%. There were 134 other wildcat discoveries with an average depth of 9,475 ft and a success rate of 64.7%. The Oligocene trend remained the most active, with 40.6% of the wildcats, followed by the Eocene trend with 34.6%. Most of the significant new-field discoveries were made in the Oligocene Frio and Eocene Wilcox Formations. After a 6-year low in offshore exploratory drilling in 1981 (42 wildcats), 1982 saw a solid rebound with 70 exploratory wells drilled. However, the success rate for new-field wildcats continued to fall to (3.6%). Onshore geophysical activity hit a 4-year low in 1982 with only 872 crew-weeks worked. Offshore geophysical activity hit an all-time high in 1982 with 225 crew-weeks worked, probably in response to the 1983 expanded federal OCS sales.

  4. Oil and gas developments in Louisiana Gulf Coast onshore in 1983

    SciTech Connect

    Borowski, W.S.; Shukla, N.; Rives, J.S. II

    1984-10-01

    The south Louisiana Gulf Coast onshore region consists of 38 parishes. Petroleum operators completed 1230 wells in this area in 1983, a 9% decline from the 1344 of 1982. The 1983 total footage decreased to 13,453,752 ft from the 1982 total footage of 15,670,916 ft. Operators drilled 218 wildcats, 274 exploratory tests, and 738 development wells during 1983. The success rate was 6% for development wells. Wildcat drilling discovered 11 significant new fields. Three of these field discoveries produced from Cretaceous zones, 1 produced from the Wilcox sand, 3 produced from the Oligocene Frio or Hackberry sands, and 4 produced from Miocene sands. Leasing activity decreased 26% from the 1982 level of 1,005,464 acres to 801,043 acres. Leasing was most active in St. Bernard, Calcasieu, Jefferson Davis, Vermillion, and Terrebonne Parishes. Leasing along the oil-bearing Wilcox trend was brisk, pushing rentals to more than $1000/acre. Geophysical activity decreased for the second consecutive year. Seismic shooting decreased 21% from the 1982 level of 1526 crew-weeks to 1212 crew-weeks for 1983. The highest levels of seismic activity were recorded in Lafourche, Cameron, and Terrebonne Parishes, which are situated along the Miocene trend. 1 figure, 5 tables.

  5. Oil and gas developments in Upper Gulf Coast of Texas in 1984

    SciTech Connect

    Cook, T.R.; Lanigan, J.C. Jr.

    1985-10-01

    Wells drilled in the Upper Gulf Coast of Texas during 1984 totaled 1973, almost the same as 1983's total of 1979 wells. Onshore exploratory drilling continued to decrease, with 329 wildcats drilled compared to 426 in 1983 and 505 in 1982. Development drilling accounted for 83% of all onshore wells, up 6% from the 2 previous years. There were 36 new-field discoveries in 1984 with an average depth of 10,163 ft and a success rate of 20%. The 96 other exploratory discoveries had a success rate of 64%. The Oligocene trend was the most active, with 43% of the wildcat drilling, followed by the Eocene trend, with 39%. Offshore exploratory drilling was up sharply from 1983. A total of 57 wildcats were completed during 1984, up from 37 in 1983. Seven wildcats were successful gas completions for a 12% success rate (there were no oil completions). An additional 38 wildcats drilled during 1984 were classified as suspended at year end. Onshore geophysical activity increased in 1984 to 937 crew-weeks from 1983's 894 crew-weeks. Offshore activity hit an all-time high for the third consecutive year with 317.5 crew-weeks. 1 figure, 5 tables.

  6. Oil and gas developments in Upper Gulf Coast of Texas in 1983

    SciTech Connect

    Lanigan, J.C. Jr.; Cook, T.R.

    1984-10-01

    Wells drilled in the Upper Gulf Coast of Texas during 1983 totaled 1979, down 23% from the 1982 total of 2581. Onshore exploratory drilling continued to decrease, with 426 wildcat wells drilled compared to 505 wells in 1982 and 581 in 1981. Development drilling accounted for 77% of all onshore wells, virtually unchanged from the previous 3 years, but the 1422 wells drilled was 25% fewer than in 1982. There were 58 new-field discoveries in 1983 with an average depth of 10,393 ft and a success rate of 22%. The 119 other exploratory discoveries in 1983 had a success rate of 73%. The Oligocene trend was the most active, with 43.9% of the wildcat drilling, followed by the Eocene trend. Offshore exploratory drilling slipped from 42 new-field wildcats in 1982 to 38 completed wildcats in 1983. Four new fields were discovered and 2 were extended. Average depth of an offshore exploratory well was 10,250 ft. With 61 wells listed as suspended operations at year end, the success rate of offshore exploratory wells could increase sharply. Onshore geophysical activity increased slightly in 1983 to 894 crew-weeks. Offshore activity hit an all-time high for the second year in a row with 288 1/2 crew-weeks. 1 figure, 5 tables.

  7. Oil and gas developments in upper Gulf Coast of Texas in 1981

    SciTech Connect

    Finneran, J.M.; Lanigan, J.C. Jr.

    1982-11-01

    Wells drilled in the Upper Texas Gulf Coast during 1981 totaled 2502, up 37% from the 1980 total of 1826. Onshore development drilling accounted for 76% of the total with 1910 wells, a 36% increase over the previous year. Onshore exploratory drilling also had a 37% increase, with 581 wildcats drilled in 1981 compared with 420 wildcats drilled in 1980. There were 65 successful new-field discoveries in 1981 with an average depth of 10,549 ft and a success rate of 19.6%. The Oligocene trend remained the most active exploration trend with 44% of the wildcats; however, the Eocene trend, particularly the Yegua Formation, was the target of the most significant discoveries. Offshore, exploratory drilling decreased dramatically by 54% with only 42 wells drilled compared with 90 the previous year. Offshore development drilling increased 27% in 1981 with 88 wells drilled compared with 64 in 1980. Onshore, geophysical activity decreased slightly with 1064 crew-weeks worked compared with 1174 crew-weeks in 1980. Offshore geophysical activity also decreased with only 97.5 crew-weeks worked compared with the 156 crew-weeks of the previous year. In 2 state lease sales and 1 federal lease sale held in 1981, the industry spent $1.13 billion to acquire 476,530 acres.

  8. A Francisella-like endosymbiont in the Gulf Coast tick evolved from a mammalian pathogen

    PubMed Central

    Gerhart, Jonathan G.; Moses, Abraham S.; Raghavan, Rahul

    2016-01-01

    Ticks (order Ixodida) vector pathogenic bacteria that cause diseases in humans and other mammals. They also contain bacteria that are closely related to pathogens but function as endosymbionts that provide nutrients that are missing from mammalian blood—their sole food source. For instance, mammalian pathogens such as Coxiella burnetii and Francisella tularensis, as well as Coxiella-like and Francisella-like endosymbionts (CLEs and FLEs, respectively) occur in ticks worldwide. However, it is not clear whether the pathogens evolved from symbionts or symbionts from pathogens. Recent studies have indicated that C. burnetii likely originated from a tick-associated ancestor, but the origins of FLEs are not clear. In this study, we sequenced the genome of an FLE, termed FLE-Am, present in the Gulf Coast tick, Amblyomma maculatum. We show that FLE-Am likely evolved from a pathogenic strain of Francisella, indicating that tick endosymbionts can evolve from mammalian pathogens. Although the genome of FLE-Am is almost the same size as the genomes of pathogenic Francisella strains, about one-third of its protein-coding genes contain inactivating mutations. The relatively low coding capacity and extensive metabolic capabilities indicate that FLE-Am transitioned recently to its current endosymbiotic lifestyle and likely replaced an ancient endosymbiont with degraded functionality. PMID:27645766

  9. Cohort study of occupational asbestos-exposure related neoplasms in Texas Gulf Coast area

    SciTech Connect

    Zadeii, G.R.M.

    1987-01-01

    A cohort study was conducted in Texas and Louisiana Gulf Coast area on individual workers who have been exposed to asbestos for 15 years or more. Most of these workers were employed in petrochemical industries. Of the 15,742 subjects initially selected for the cohort study, 3258 had positive chest x-ray findings believed to be related to prolonged asbestos exposure. These subjects were further investigated. Their work out included detailed medical and occupational history, laboratory tests and spirometry. One thousand eight-hundred and three cases with positive chest x-ray findings whose data files were considered complete at the end of May 1986 were analyzed and their findings included in this report. The prevalence of lung cancer and cancer of the following sights: skin, stomach, oropharyngeal, pancreas and kidneys were significantly increased when compared to data from Connecticut Tumor Registry. The prevalence of other chronic conditions such as hypertension, emphysema, heart disease and peptic ulcer was also significantly high when compared to data for the US and general population furnished by the National Center for Health Statistics. In most instances the occurrence of cancer and the chronic ailment previously mentioned appeared to follow 15-25 years of exposure to asbestos.

  10. Depositional environments of the Wilcox Group, Texas Gulf Coast: Stratigraphic and early diagenetic signatures

    SciTech Connect

    May, J.A.; Stonecipher, S.A. )

    1990-09-01

    Deposition of the late Paleocene-early Eocene Wilcox Group is controversial. Are Wilcox reservoirs entirely of shallow-marine origin, or are basinal turbidites also present The authors analyzed over 5,000 ft of core from 15 wells along the Texas Gulf Coast to constrain the environments of deposition. They attribute all cores examined to date to 12 subenvironments of the delta plain to continental shelf. These include distributary channel, lake, marine bay, crevasse-splay delta, shoreface, lagoon, tidal flat, tidal channel, distributary-mouth bar, distal bar, prodelta, and shelf. Each subenvironment displays a characteristic well-log signature. Criteria for recognition in core include grain-size variations, physical sedimentary structures, trace fossils, mineralogy, bedding styles, and vertical sequences, all resulting from the interplay of specific physical, biological, and chemical processes operative in each subenvironment. They did not identify any submarine-fan deposits. They also attempted to determine the importance of depositional facies and provenance on diagenetic trends. Early diagenetic patterns appear to be related to factors such as sediment texture, detrital composition, organic content, and original water chemistry, which were, in turn, controlled directly or indirectly by depositional environment. Rapid lateral and vertical changes in depositional environments produced markedly different early diagenetic patterns in sand units only a few feet or even inches apart. Thus, diagenetic facies defined on the basis of texture, composition, and cements can be used to complement, and test, their interpretations of depositional environments based solely on traditional sedimentologic and genetic-sequence criteria.

  11. Environmental monitoring and assessment program: Gulf Coast Salt Marsh Pilot Study

    SciTech Connect

    Squires, L.

    1992-11-01

    The Environmental Monitoring and Assessment Program (EMAP) was initiated by the U.S. Environmental Protection Agency (EPA) to monitor the condition of the Nation's natural resources. The Wetlands component of EMAP is designed to quantitatively assess the current status and long-term trends in wetland condition at regional and national scales. In the short-term, EMAP-Wetlands will provide standarized protocols for measuring and describing wetland condition, report on estimates of wetland condition in selected regions of the country, and develop standardized formats for reporting results. EMAP-Wetlands is being implemented by wetland class and geographic regions in three phases. Pilot studies are being conducted in small geographic regions (e.g., states) during the first phase to evaluate the ability of potential indicators to meet certain selection criteria. These studies will be followed by demonstration studies that evaluate the performance of indicators on larger scales (e.g., Gulf Coast region). Indicators that successfully meet critical criteria will be implemented regionally and nationally to assess wetland condition.

  12. Final report on decommissioning boreholes and wellsite restoration, Gulf Coast Interior Salt Domes of Mississippi

    SciTech Connect

    Not Available

    1989-04-01

    In 1978, eight salt domes in Texas, Louisiana, and Mississippi were identified for study as potential locations for a nuclear waste repository as part of the National Waste Terminal Storage (NWTS) program. Three domes were selected in Mississippi for ``area characterization`` phase study as follows: Lampton Dome near Columbia, Cypress Creek Dome near New Augusta, and Richton Dome near Richton. The purpose of the studies was to acquire geologic and geohydrologic information from shallow and deep drilling investigations to enable selection of sites suitable for more intensive study. Eleven deep well sites were selected for multiple-well installations to acquire information on the lithologic and hydraulic properties of regional aquifers. In 1986, the Gulf Coast salt domes were eliminated from further consideration for repository development by the selection of three candidate sites in other regions of the country. In 1987, well plugging and restoration of these deferred sites became a closeout activity. The primary objectives of this activity are to plug and abandon all wells and boreholes in accordance with state regulations, restore all drilling sites to as near original condition as feasible, and convey to landowners any wells on their property that they choose to maintain. This report describes the activities undertaken to accomplish these objectives, as outlines in Activity Plan 1--2, ``Activity Plan for Well Plugging and Site Restoration of Test Hole Sites in Mississippi.``

  13. Success of artificial bird nests in burned Gulf Coast Chenier Plain marshes

    USGS Publications Warehouse

    Gabrey, S.W.; Wilson, B.C.; Afton, A.D.

    2002-01-01

    Wildlife managers in the Gulf Coast Chenier Plain of Louisiana and Texas frequently burn marshes during winter to improve habitat for wintering waterfowl and furbearers. Such fires dramatically alter vegetation structure and cover, although such changes are generally temporary. However, if vegetation cover does not recover sufficiently by the start of the subsequent breeding season, nests of marsh birds could be exposed to increased predation rates. We examined effects of burning on 2 measures of vegetation structure and on 2 types of artificial bird nests during breeding seasons (May and June) before and after experimental winter burns (December and January). We found that vegetation structure did not differ between burned and non-burned marshes at 5 months post-burn. Similarly, depredation rates of artificial sparrow and duck nests did not differ between burned and non-burned marshes during the post-burn breeding season. We recommend that managers complete burning programs by the end of January so that sufficient nesting cover develops before the start of the breeding season.

  14. Trapped in Place? Segmented Resilience to Hurricanes in the Gulf Coast, 1970–2005

    PubMed Central

    Logan, John R.; Issar, Sukriti; Xu, Zengwang

    2016-01-01

    Hurricanes pose a continuing hazard to populations in coastal regions. This study estimates the impact of hurricanes on population change in the years 1970–2005 in the U.S. Gulf Coast region. Geophysical models are used to construct a unique data set that simulates the spatial extent and intensity of wind damage and storm surge from the 32 hurricanes that struck the region in this period. Multivariate spatial time-series models are used to estimate the impacts of hurricanes on population change. Population growth is found to be reduced significantly for up to three successive years after counties experience wind damage, particularly at higher levels of damage. Storm surge is associated with reduced population growth in the year after the hurricane. Model extensions show that change in the white and young adult population is more immediately and strongly affected than is change for blacks and elderly residents. Negative effects on population are stronger in counties with lower poverty rates. The differentiated impact of hurricanes on different population groups is interpreted as segmented withdrawal—a form of segmented resilience in which advantaged population groups are more likely to move out of or avoid moving into harm’s way while socially vulnerable groups have fewer choices. PMID:27531504

  15. Trapped in Place? Segmented Resilience to Hurricanes in the Gulf Coast, 1970-2005.

    PubMed

    Logan, John R; Issar, Sukriti; Xu, Zengwang

    2016-10-01

    Hurricanes pose a continuing hazard to populations in coastal regions. This study estimates the impact of hurricanes on population change in the years 1970-2005 in the U.S. Gulf Coast region. Geophysical models are used to construct a unique data set that simulates the spatial extent and intensity of wind damage and storm surge from the 32 hurricanes that struck the region in this period. Multivariate spatial time-series models are used to estimate the impacts of hurricanes on population change. Population growth is found to be reduced significantly for up to three successive years after counties experience wind damage, particularly at higher levels of damage. Storm surge is associated with reduced population growth in the year after the hurricane. Model extensions show that change in the white and young adult population is more immediately and strongly affected than is change for blacks and elderly residents. Negative effects on population are stronger in counties with lower poverty rates. The differentiated impact of hurricanes on different population groups is interpreted as segmented withdrawal-a form of segmented resilience in which advantaged population groups are more likely to move out of or avoid moving into harm's way while socially vulnerable groups have fewer choices.

  16. Hurricane Katrina and mental health: a research note on Mississippi Gulf Coast residents.

    PubMed

    Picou, J Steven; Hudson, Kenneth

    2010-01-01

    Katrina was the most devastating and deadliest hurricane in recent U.S. history. The storm was particularly destructive for residents of the Mississippi Gulf Coast where sustained winds of 135 mph and a storm surge of 32 feet literally obliterated the built and modified environments. Limited research exists on the chronic (32 months) mental health impacts of survivors in this geographical area. Random-digit dialing telephone surveys were administered in Harrison and Hancock counties (Mississippi) in April and May 2008 and data were collected on a number of mental health outcomes. The results of the calculation of Oridinary Least Squares (OLS) regression models revealed that females, African Americans, and less-educated residents manifested the most severe mental health impacts. Most important, consistent findings for depression and Katrina-related psychological stress indicate that residents who were separated from family members, had maximum residential damage, and suffered severe financial problems remained significantly impacted 32 months after Katrina’s landfall. A secondary stressor, in the form of having applications to the Mississippi State Grant Program denied or not processed also predicted personal depression. The implications of these findings are discussed.

  17. Composition of breeding bird communities in Gulf Coast Chenier Plain marshes: Effects of winter burning

    USGS Publications Warehouse

    Gabrey, S.W.; Afton, A.D.

    2004-01-01

    Marsh managers along the Gulf Coast Chenier Plain frequently use winter burns to alter marsh vegetation and improve habitat quality for wintering waterfowl. However, effects of these burns on marsh avifauna are not well documented. We recorded abundances of breeding bird species and vegetation structure in burned and unburned control marshes during one breeding season before (1996) and two breeding seasons after (1997, 1998) experimental winter burns. We used non-metric multidimensional scaling analysis to assess the extent and direction of changes in bird community compositions of burned and unburned control marshes and to investigate the influence of vegetation structure on bird community composition. Overall, we found that Seaside Sparrows (Emberizidae: Ammodramus maritimus [Wilson]) and Red-winged Blackbirds and Boat-tailed Grackles (Icteridae: Agelaius phoeniceus [L.] and Quiscalus major Vieillot, respectively) comprised > 85% of observed birds. In burned marshes during the first breeding season following experimental burns (1997), icterid abundance increased while Seaside Sparrow abundance decreased relative to pre-burn (1996) conditions. This pattern was reversed during the second breeding season post-burn. No obvious patterns of change in avian abundance were detected in unburned control marshes over the 3-year period. Qualitative changes in breeding bird community composition were related to effects of winter burning on percent cover of dead vegetation and Spartina patens (Aiton) Muhl.

  18. Seasonal infestations of two stem borers (Lepidoptera: Crambidae) in noncrop grasses of Gulf Coast rice agroecosystems.

    PubMed

    Beuzelin, J M; Mészáros, A; Reagan, T E; Wilson, L T; Way, M O; Blouin, D C; Showler, A T

    2011-10-01

    Infestations of two stem borers, Eoreuma loftini (Dyar) and Diatraea saccharalis (F.) (Lepidoptera: Crambidae), were compared in noncrop grasses adjacent to rice (Oryza sativa L.) fields. Three farms in the Texas rice Gulf Coast production area were surveyed every 6-8 wk between 2007 and 2009 using quadrat sampling along transects. Although D. saccharalis densities were relatively low, E. loftini average densities ranged from 0.3 to 5.7 immatures per m(2) throughout the 2-yr period. Early annual grasses including ryegrass, Lolium spp., and brome, Bromus spp., were infested during the spring, whereas the perennial johnsongrass, Sorghum halepense (L.) Pers., and Vasey's grass, Paspalum urvillei Steud., were infested throughout the year. Johnsongrass was the most prevalent host (41-78% relative abundance), but Vasey's grass (13-40% relative abundance) harbored as much as 62% of the recovered E. loftini immatures (during the winter). Young rice in newly planted fields did not host stem borers before June. April sampling in fallow rice fields showed that any available live grass material, volunteer rice or weed, can serve as a host during the spring. Our study suggests that noncrop grasses are year-round sources of E. loftini in Texas rice agroecosystems and may increase pest populations.

  19. Statistical evaluation of oil and gas prospects in the outer continental shelf of the U.S. Gulf Coast

    USGS Publications Warehouse

    Davis, J.C.; Harbaugh, J.W.

    1983-01-01

    Areas of the U.S. Gulf Coast, both onshore and offshore, are among the petroliferous regions of the United States. In offshore Louisiana and Texas, most oil and gas is associated with structurally controlled traps on the crest or flanks of domes created by the diapiric movement of salt. These structures can be detected and mapped by seismic techniques that directly indicate favorable prospective areas. The characteristics of seismically defined structures provide information in advance of drilling about the probable size of reservoirs contained within these structures. Simple statistical relationships can be determined between the size, shape, and other attributes of structures detected by seismic mapping and the presence and size of petroleum and natural gas reservoirs. Gulf Coast OCS lease tracts presently are evaluated by the U.S. government using a Monte Carlo simulation procedure adapted from reservoir analysis. Specification of the parameters of the Monte Carlo model are obtained subjectively in advance of drilling and thus are highly uncertain. Comparisons of predrill predictions with postdiscovery reservoir evaluations show very low correlations. In contrast, predrill predictions based on regressions between seismic structural properties and reservoir volumes show highly significant correlations. In addition, statistical analysis of seismic structure is much simpler than the Monte Carlo procedure, and can be applied rapidly and inexpensively. A statistical analysis of the "Pleistocene Trend" of offshore Louisiana and Texas, an area of about 3 million acres, yielded results that are sufficiently encouraging to suggest that similar evaluations be made of the remaining Gulf Coast OCS and of OCS regions off of other coasts of the United States. ?? 1983 Plenum Publishing Corporation.

  20. Origin of crude oil in eastern Gulf Coast: Upper Jurassic, Upper Cretaceous, and lower Tertiary source rocks

    SciTech Connect

    Sassen, R.

    1988-02-01

    Analysis of rock and crude oil samples suggests that three source rocks have given rise to most crude oil in reservoirs of the eastern Gulf Coast. Carbonate source rocks of the Jurassic Smackover Formation are characterized by algal-derived kerogen preserved in an anoxic and hypersaline environment, resulting in crude oils with distinct compositions. Migration commenced during the Cretaceous, explaining the emplacement of Smackover-derived crude oil in Jurassic and in some Cretaceous reservoirs. Upper Cretaceous clastic and carbonate source rocks are also present. Much crude oil in Upper Cretaceous reservoirs has been derived from organic-rich marine shales of the Tuscaloosa Formation. These shales are characterized by algal and higher plant kerogen, resulting in distinct crude oil compositions. Migration commenced during the Tertiary, but was mostly focused to Upper Cretaceous reservoirs. Lower Tertiary shales, including those of the Wilcox Formation, are quite organic-rich and include downdip marine facies characterized by both algal and higher plant kerogen. Crude oils in lower Tertiary reservoirs are dissimilar to crude oils from deeper and older source rocks. Migration from lower Tertiary shales commenced during the late Tertiary and charged Tertiary reservoirs. Although most crude oil in the eastern Gulf Coast has been emplaced by short-range migration, often with a strong vertical component, some long-range lateral migration (> 100 km) has occurred along lower Tertiary sands. The framework of crude oil generation and migration onshore has important implications with respect to origin of crude oil in the Gulf of Mexico.

  1. Sweet lake geopressured-geothermal project, Magma Gulf-Technadril/DOE Amoco Fee. Annual report, December 1, 1979-February 27, 1981. Volume I. Drilling and completion test well and disposal well

    SciTech Connect

    Rodgers, R.W.

    1982-06-01

    The Sweet lake site is located approximately 15 miles southeast of Lake Charles in Cameron Parish, Louisiana. A geological study showed that the major structure in this area is a graben. The dip of the beds is northwesterly into the basin. A well drilled into the deep basin would find the target sand below 18,000', at high pressures and temperatures. However, since there is no well control in the basin, the specific site was chosen on the 15,000' contour of the target sand in the eastern, more narrow part of the garben. Those key control wells are present within one mile of the test well. The information acquired by drilling the test well confirmed the earlier geologic study. The target sand was reached at 15,065', had a porosity of over 20% and a permeability to water of 300 md. The original reservoir pressure was 12,060 psi and the bottom hole temperature 299{sup 0}F. There are approximately 250 net feet of sand available for the perforation. The disposal well was drilled to a total depth of 7440'.

  2. Establishing storm thresholds for the Spanish Gulf of Cádiz coast

    NASA Astrophysics Data System (ADS)

    Del Río, Laura; Plomaritis, Theocharis A.; Benavente, Javier; Valladares, María; Ribera, Pedro

    2012-03-01

    In this study critical thresholds are defined for storm impacts along the Spanish coast of the Gulf of Cádiz. The thresholds correspond to the minimum wave and tide conditions necessary to produce significant morphological changes on beaches and dunes and/or damage on coastal infrastructure or human occupation. Threshold definition was performed by computing theoretical sea-level variations during storms and comparing them with the topography of the study area and the location of infrastructure at a local level. Specifically, the elevations of the berm, the dune foot and the entrance of existing washovers were selected as threshold parameters. The total sea-level variation generated by a storm event was estimated as the sum of the tidal level, the wind-induced setup, the barometric setup and the wave-associated sea-level variation (wave setup and runup), assuming a minimum interaction between the different processes. These components were calculated on the basis of parameterisations for significant wave height (Hs) obtained for the oceanographic and environmental conditions of the Gulf of Cadiz. For this purpose real data and reanalysis time-series (HIPOCAS project) were used. Validation of the obtained results was performed for a range of coastal settings over the study area. The obtained thresholds for beach morphological changes in spring tide conditions range between a significant wave height of 1.5 m and 3.7 m depending on beach characteristics, while for dune foot erosion are around 3.3 to 3.7 m and for damage to infrastructure around 7.2 m. In case of neap tide conditions these values are increased on average by 50% over the areas with large tidal range. Furthermore, records of real damage in coastal infrastructure caused by storms were collected at a regional level from newspapers and other bibliographic sources and compared with the hydrodynamic conditions that caused the damage. These were extracted from the hindcast database of the HIPOCAS project

  3. Long Term Geoelectrical Monitoring of Deep-water Horizon Oil Spill in the Gulf Coast

    NASA Astrophysics Data System (ADS)

    Heenan, J. W.; Ntarlagiannis, D.; Slater, L. D.; Atekwana, E. A.; Ross, C.; Nolan, J. T.; Atekwana, E. A.

    2011-12-01

    In the aftermath of the catastrophic Deep-water Horizon (DWH) spill in the Gulf Coast, opportunities exist to study the evolution of fresh crude oil contamination in beach sediments and marshes. Grand Terre 1 Island, off the coast of Grand Isle in southern Louisiana, is an uninhabited barrier island, heavily impacted by the DWH spill, and ideal for undisturbed long term monitoring of crude oil degradation processes. A 10 channel Syscal-Pro resistivity / IP instrument (IRIS Instruments, France) is the heart of the fully autonomous geoelectrical monitoring system; the system, which is housed in a weatherproof container, relies solely on solar power, is controlled by an energy efficient PC and can be accessed remotely via web tools. The monitoring scheme involves collecting bi-daily resistivity measurements from surface and shallow boreholes, ranging from January 2011 to the present; environmental parameters, such as T, are continuously recorded at several depths. During regular field trips we perform larger scale geophysical surveys, and geochemical measurements (pH, DO, T, fluid C) to support the continuous geophysical monitoring. The contaminated layer on site is a visually distinctive layer of crude oil, isolated by cleaner sands above and below which is identified by a clear and obvious resistive anomaly in preliminary surveys. Early results show a decrease in average of the resistance values of each dataset over time. Further processing of the data yields a linearly shaped resistive anomaly, which coincides with the location of the oil layer. The changes in subsurface resistivity appear to be focused within this anomaly. Time filtering of the data by the time that they were collected, morning or evening, reveals a diurnal variation. While both time frames follow the same overall trend, the measurements in the morning are slightly more resistive than those in the evening. This indicates that there are environmental factors, such as temperature, that need to be

  4. Attributes and origins of ancient submarine slides and filled embayments: Examples from the Gulf Coast basin

    SciTech Connect

    Morton, R.A. )

    1993-06-01

    Large submarine slides and associated shelf margin embayments represent an intermediate member in the continuum of unstable shelf margin features. On seismic profiles, they may resemble submarine canyons, but are different in their size, morphology, origin, and hydrocarbon exploration potential. Two large Neogene submarine slides, located in the northwestern Gulf Coast Basin, formed on the upper slope and flanks of prominent shelf-margin deltas. The basal detachment surface of each slide is a structural discontinuity that may be misinterpreted as an erosional unconformity and misidentified as a stratigraphic boundary separating depositional sequences. Regional stratigraphic correlations indicate that both slides were initiated after the continental platform was flooded. The condensed sections deposited during the rise in relative sea level contain the basal detachment surfaces. The relationships between the slides and sea level fluctuations are uncertain. The shelf-margin embayments created by the slides apparently were partly excavated during periods of lowered relative sea level and were filled during sea level rise and highstand. Eventually the preslide morphology of the shelf margin was restored by coalsced prograding deltas. Submarine slides exhibit landward dipping, wavy, mounded, and chaotic seismic reflection that are manifestations of slump blocks and other mass transport material. Composition of these internally derived slide deposits depends on th composition of the pre-existing shelf margin. Embayment fill above the slide consists mostly of externally derived mudstones and sandstones deposited by various disorganized slope processes, as well as more organized submarine channel-level systems. Thickest slope sandstones, which are potential hydrocarbon reservoirs, commonly occur above the basal slide mudstones where seismic reflections change from chaotic patterns to overlying wavy or subhorizontal reflections. 46 refs., 10 figs., 1 tab.

  5. Barrier island evolution and reworking by inlet migration along the Mississippi-Alabama gulf coast

    SciTech Connect

    Rucker, J.B.; Snowden, J.O. )

    1990-09-01

    The five barrier islands along the Mississippi-Alabama coast are located 10 to 14 mi (16 to 23 km) offshore and separate Mississippi Sound from the Gulf of Mexico. The barrier islands in the chain are, from east to west: Dauphin Island, Petit Bois Island, Horn Island, Ship Island, and Cat Island. The islands are low sand bodies situated on a relatively broad Holocene sand platform that extends 70 mi (113 km) from Dauphin Island on the east to Cat Island on the west. The platform varies in thickness from 25 to 75 ft (7.6 to 23 m) and rests on Holocene marine clays or on Pleistocene sediments. The barrier island chain predates the St. Bernard lobe of the Mississippi delta complex, which began to prograde about 3,000 years ago, and continued until it was abandoned approximately 1,500 years ago. In contrast to the other islands, Cat Island at the western down-drift end of the Mississippi-Alabama barrier island chain is characterized by more than 12 prominent east west-oriented progradational linear ridges. The ridge system of Cat Island is interpreted as a relict of an earlier stage in the life cycle of the barrier platform when there was a more robust littoral drift system and an abundant sediment supply During the Pre-St. Bernard Delta period of vigorous sedimentation, all of the islands in the barrier chain probably exhibited progradational ridges similar to those now found only on Cat Island. Presently, only vestigial traces of these progradational features remain on the islands to the east of Cat Island. Unlike Cat Island, which has been protected and preserved by the St. Bernard Delta, the other barrier islands have been modified and reworked during the past 1,500 years by processes of island and tidal inlet migration, accompanied by a general weakening of the littoral drift and a reduction of the available sediment supply.

  6. An assessment of change in risk perception and optimistic bias for hurricanes among Gulf Coast residents.

    PubMed

    Trumbo, Craig; Meyer, Michelle A; Marlatt, Holly; Peek, Lori; Morrissey, Bridget

    2014-06-01

    This study focuses on levels of concern for hurricanes among individuals living along the Gulf Coast during the quiescent two-year period following the exceptionally destructive 2005 hurricane season. A small study of risk perception and optimistic bias was conducted immediately following Hurricanes Katrina and Rita. Two years later, a follow-up was done in which respondents were recontacted. This provided an opportunity to examine changes, and potential causal ordering, in risk perception and optimistic bias. The analysis uses 201 panel respondents who were matched across the two mail surveys. Measures included hurricane risk perception, optimistic bias for hurricane evacuation, past hurricane experience, and a small set of demographic variables (age, sex, income, and education). Paired t-tests were used to compare scores across time. Hurricane risk perception declined and optimistic bias increased. Cross-lagged correlations were used to test the potential causal ordering between risk perception and optimistic bias, with a weak effect suggesting the former affects the latter. Additional cross-lagged analysis using structural equation modeling was used to look more closely at the components of optimistic bias (risk to self vs. risk to others). A significant and stronger potentially causal effect from risk perception to optimistic bias was found. Analysis of the experience and demographic variables' effects on risk perception and optimistic bias, and their change, provided mixed results. The lessening of risk perception and increase in optimistic bias over the period of quiescence suggest that risk communicators and emergency managers should direct attention toward reversing these trends to increase disaster preparedness.

  7. Contamination by Arsenate in Oxidizing Groundwater, Southern Gulf Coast Aquifer System, Texas

    NASA Astrophysics Data System (ADS)

    Gates, J. B.; Nicot, J.; Reedy, R. C.; Scanlon, B. R.

    2009-12-01

    Groundwater arsenic concentrations exceed the U.S. EPA maximum contaminant level for drinking water (10 μg/L) in about one-third of wells in the southern Gulf Coast Aquifer System (GCAS) in Texas, representing a potential public health hazard and an environmental compliance challenge to numerous small public water supply systems. The aim of this study is to better understand the hydrogeochemical mechanisms underpinning the widespread distribution of elevated groundwater arsenic concentrations in the region. Here we focus upon arsenic contamination in unconfined portions of the aquifer system. The investigation is based upon chemical analyses of a field transect of 27 groundwater samples collected from across three units of the GCAS; stratified water quality sampling from one additional well; and relevant water chemistry data from the Texas Water Development Board groundwater database (more than 500 samples). Chemical results from the field study showed that carbonate weathering and active recharge in the unconfined zone result in circum-neutral pH and oxidizing redox conditions, which are typically amenable to arsenic immobilization by adsorption of As(V) onto mineral oxides and clays. However, arsenic concentrations were found up to 129 μg/L (median 12 μg/L), and As(V) represented nearly 100% of total arsenic. Concentrations generally decreased with increasing distance from the Catahoula Formation (which contains abundant volcanic ash presumed to be the original arsenic source), through the overlying Jasper, Evangeline and Chicot Aquifers. Statistically significant pairwise correlations with arsenic were found for vanadium, silica and potassium, all of which were released during weathering of volcanic sediments and their degradation products. Silica that was co-released with arsenic may compete for sorption sites and reduce the capacity for arsenic adsorption. An important role for variable arsenic source availability was suggested by regional spatial

  8. Oil and gas developments in Louisiana Gulf Coast onshore in 1987

    SciTech Connect

    Ver Hoeve, J.A.; Borowski, W.S.

    1988-10-01

    The stabilization of oil prices during 1987 failed to halt the decline in exploration and development activity in the Gulf Coast onshore portion of southern Louisiana. Companies continued to limit their exposure in high risk - high cost exploration ventures, preferring to invest money in development or in exploration within well-established trends such as the Miocene and Oligocene. More oil than gas wells were drilled because of the continuing oversupply of natural gas, and only a few wells were drilled to depths exceeding 20,000 ft. As a result of this conservative policy, even fewer new fields were discovered in 1987 than had been found in 1986. Operators drilled 792 wells in onshore south Louisiana in 1987, a decrease of 20% from 1986 and a fall of 50% from the peak year of 1981. Industry drilled 83 new-field wildcats, 90 other exploration tests, and 619 development tests. Total footage dropped 13% to 7,520,172 ft, but average footage rose to 9,495 ft/well compared to 8,801 ft/well in 1986. The industry success rate was 59%, with 14 new-field discoveries and 19 significant extensions completed. Leasing activity in south Louisiana continued to drop as only 260,533 ac were leased. The decrease was a slight 3% in respect to 1986 but a huge 85% compared to the peak year of 1981. The preferred leasing sites were Vermilion, Lafourche, Vernon, Calcasieu, and West Feliciana Parishes. Seismic acquisition has been decimated since the oil price collapse of 1986. Geophysical activity for 1987 amounted to 281 crew-weeks, a decline of 36% and 84% from 1986 and 1981 levels, respectively. Shooting hot spots were Terrebonne, Vermilion, Jefferson Davis, Cameron, Calcasieu, and St. Martin Parishes. 4 figs., 5 tabs.

  9. Some effects of aldrin-treated rice on Gulf Coast wildlife

    USGS Publications Warehouse

    Flickinger, Edward L.; King, K.A.

    1972-01-01

    Wildlife casualties from aldrin-dieldrin poisoning are associated with the planting of aldrin-treated rice seed along the Texas Gulf Coast. The fulvous tree duck (Dendrocygna bicolor), which depends on the rice field habitats and is highly susceptible to aldrin-dieldrin poisoning, is suffering a serious population decline in that area. Dead waterfowl, shorebirds, and passerines were collected on study areas in Wharton, Brazoria, and Chambers counties, Texas, from 1967 through 1971. Residues of aldrin or dieldrin were found in all samples of bird casualties and in all eggs, scavengers, predators, fish, frogs, invertebrates, and soils. Fulvous tree ducks appeared to be less resistant to aldrin than other ducks. Dieldrin residues in brains of dead fulvous tree ducks were low, but whole-body residues were as high as 16 ppm. Brains of other dead ducks and geese averaged 10 ppm dieldrin. Some dead birds were exposed by eating treated rice seed, but many dead birds with high dieldrin residues were species that feed largely on invertebrates. Although soil residues were low, snails and crayfish contained enough aldrin and dieldrin (average 9.5 ppm) to account for deaths in birds that fed heavily on these invertebrates over a period of time. When fulvous tree ducks were penned for 3 days in fields aerially planted with treated seed, 3 of 10 birds died with brain residues of 2.5, 2.9, and 6.8 ppm dieldrin, and others were intoxicated. None of eight died, and some gained weight, when penned in fields planted with untreated seed. This study adds further evidence for the suspected lethal effects of aldrin-treated rice seed on wild birds and other wildlife in rice field habitats.

  10. Effects of inherited of pre-jurassic tectonics on the U. S. Gulf Coast

    SciTech Connect

    Adams, R.L. )

    1993-09-01

    Extensional and compressional tectonic features from the Canadian shield to the United States Gulf Coast reflect repeated and continued movement of crustal elements along northwest-southeast paths. Resultant rift and thrust features formed perpendicular to that orientation. Cycles of ocean formation (rifting), quiescence, and ocean closure (thrusting) control the structural style and stratigraphic sequences that record the accretion of much of the North American continent onto the Canadian shield. The Triassic separation of North America from South America resulted in an irregular fragmented arc that now extends from Central America to South Florida. Stranded blocks of continental crust, left behind by the jumping of spreading centers during rifting, control the location of major basins over the attenuated crust between the stranded blocks. The former location of the Yucatan Peninsula is now marked by the salt-dome basins of central Mississippi, southern Louisiana, and southeastern Texas. The attenuated continental crust in this area permitted early, thick evaporite precipitation and thicker than normal sediment deposition. Translation of Mexico westward to its pre-Laramide position allows for a closer prerifting fit between North America and South America. Postrifting tectonic patterns retain an inherited fabric reflecting the Triassic rifting. Triassic horsts, grabens, and half-grabens localized and delineated later microbasins. Mapping these microbasins is essential to understanding exploration play concepts within a geologic province. Irregular thicknesses of Louann Salt resulted from salt precipitation on a block-faulted basement. The uneven thickness of salt within individual basement fault blocks (grabens and half-grabens) controlled the spatial distribution and size of the resultant salt domes, pillows, and withdrawal areas. This salt movement is one link between the original basement block faults and the resultant growth-fault basins.

  11. What dominates sea level at the coast: a case study for the Gulf of Guinea

    NASA Astrophysics Data System (ADS)

    Melet, Angélique; Almar, Rafael; Meyssignac, Benoit

    2016-05-01

    Sea level variations and extreme events are a major threat for coastal zones. This threat is expected to worsen with time because low-lying coastal areas are expected to become more vulnerable to flooding and land loss as sea level rises in response to climate change. Sea level variations in the coastal ocean result from a combination of different processes that act at different spatial and temporal scales. In this study, the relative importance of processes causing coastal sea level variability at different time-scales is evaluated. Contributions from the altimetry-derived sea-level (including the sea level rise due to the ocean warming and land ice loss in response to climate change), dynamical atmospheric forcing induced sea level (surges), wave-induced run-up and set-up, and astronomical tides are estimated from observational datasets and reanalyses. As these processes impact the coast differently, evaluating their importance is essential for assessment of the local coastline vulnerability. A case study is developed in the Gulf of Guinea over the 1993-2012 period. The leading contributors to sea level variability off Cotonou differ depending on the time-scales considered. The trend is largely dominated by processes included in altimetric data and to a lesser extent by swell-waves run-up. The latter dominates interannual variations. Swell-waves run-up and tides dominate subannual variability. Extreme events are due to the conjunction of high tides and large swell run-up, exhibiting a clear seasonal cycle with more events in boreal summer and a trend mostly related to the trend in altimetric-derived sea-level.

  12. Detection of coastal and submarine discharge on the Florida Gulf Coast with an airborne thermal-infrared mapping system

    USGS Publications Warehouse

    Raabe, Ellen; Stonehouse, David; Ebersol, Kristin; Holland, Kathryn; Robbins, Lisa

    2011-01-01

    Along the Gulf Coast of Florida north of Tampa Bay lies a region characterized by an open marsh coast, low topographic gradient, water-bearing limestone, and scattered springs. The Floridan aquifer system is at or near land surface in this region, discharging water at a consistent 70-72°F. The thermal contrast between ambient water and aquifer discharge during winter months can be distinguished using airborne thermal-infrared imagery. An airborne thermal-infrared mapping system was used to collect imagery along 126 miles of the Gulf Coast from Jefferson to Levy County, FL, in March 2009. The imagery depicts a large number of discharge locations and associated warm-water plumes in ponds, creeks, rivers, and nearshore waters. A thermal contrast of 6°F or more was set as a conservative threshold for identifying sites, statistically significant at the 99% confidence interval. Almost 900 such coastal and submarine-discharge locations were detected, averaging seven to nine per mile along this section of coast. This represents approximately one hundred times the number of previously known discharge sites in the same area. Several known coastal springs in Taylor and Levy Counties were positively identified with the imagery and were used to estimate regional discharge equivalent to one 1st-order spring, discharging 100 cubic feet per second or more, for every two miles of coastline. The number of identified discharge sites is a conservative estimate and may represent two-thirds of existing features due to low groundwater levels at time of overflight. The role of aquifer discharge in coastal and estuarine health is indisputable; however, mapping and quantifying discharge in a complex karst environment can be an elusive goal. The results of this effort illustrate the effectiveness of the instrument and underscore the influence of coastal springs along this stretch of the Florida coast.

  13. The role of forcing agents on biogeochemical variability along the southwestern Adriatic coast: The Gulf of Manfredonia case study

    NASA Astrophysics Data System (ADS)

    Specchiulli, Antonietta; Bignami, Francesco; Marini, Mauro; Fabbrocini, Adele; Scirocco, Tommaso; Campanelli, Alessandra; Penna, Pierluigi; Santucci, Angela; D'Adamo, Raffaele

    2016-12-01

    This study investigates how multiple forcing factors such as rivers, surface marine circulation and winds affect hydrology and biogeochemical processes in the Gulf of Manfredonia and the seas around the Gargano peninsula, in the south-western Adriatic Sea. The study adopted an integrated approach, using in situ and remote sensing data, as well as the output of current models. The data reveal variability in the area's hydrography induced by local freshwater sources, the Western Adriatic Current (WAC) flowing from the north along the Italian coast, and the current patterns under different wind regimes. Specifically, exchange with offshore waters in the gulf induces variability in salinity and biogeochemical content, even within the same season, i.e. winter, in our case. This strong dependence on physical and biogeochemical factors makes the Manfredonia-Gargano ecosystem vulnerable to climate change, which could compromise its important role as a nursery area for the Adriatic Sea.

  14. Overview of Collaborative Research to Assess Tsunami Hazard for Nuclear Plants on the Atlantic and Gulf Coasts

    NASA Astrophysics Data System (ADS)

    Kammerer, A. M.; ten Brink, U. S.; Titov, V. V.

    2007-12-01

    In response to the 2004 Indian Ocean Tsunami, the United States Nuclear Regulatory Commission (US NRC) initiated a long-term research program to improve understanding of tsunami hazard levels for nuclear power plants in the United States. In order to complement research focused on the Pacific Ocean by other organizations, the US NRC sponsored a collaborative research project with the United States Geological Survey (USGS) and the National Oceanic and Atmospheric Administration (NOAA) for the purpose of assessing tsunami hazard on the US Atlantic and Gulf Coasts. This research considers landslide and seismic tsunamigenic sources in both the near and the far fields. The first phase of this work, undertaken by the USGS and now nearly complete, consisted of collection, interpretation, and analysis of available offshore data, with significant effort focused on characterizing offshore near-field landslides and analyzing their tsunamigenic potential and properties. As part of the next phase of research, work will be undertaken to refine estimates of hazard on the Atlantic and Gulf coasts for a wide variety of sites. Field investigations will be undertaken by the USGS in key locations of interest which currently lack sufficient existing data. Simultaneously, the MOST tsunami model developed at NOAA will be enhanced to include landslide-based initiation mechanisms. The enhanced MOST model will then be used to investigate the tsunamigenic sources characterized by the USGS to achieve the long-term goals of the US NRC program, which include an estimation of deterministic tsunami hazard levels for the length of the Atlantic and Gulf Coasts. The potential for probabilistic tsunami hazard assessment will also be explored in the final phases of the program.

  15. Sulfate-dependent Anaerobic Oxidation of Methane as a Generation Mechanism for Calcite Cap Rock in Gulf Coast Salt Domes

    NASA Astrophysics Data System (ADS)

    Caesar, K. H.; Kyle, R.; Lyons, T. W.; Loyd, S. J.

    2015-12-01

    Gulf Coast salt domes, specifically their calcite cap rocks, have been widely recognized for their association with significant reserves of crude oil and natural gas. However, the specific microbial reactions that facilitate the precipitation of these cap rocks are still largely unknown. Insight into the mineralization mechanism(s) can be obtained from the specific geochemical signatures recorded in these structures. Gulf Coast cap rocks contain carbonate and sulfur minerals that exhibit variable carbon (d13C) and sulfur isotope (δ34S) signatures. Calcite d13C values are isotopically depleted and show a large range of values from -1 to -52‰, reflecting a mixture of various carbon sources including a substantial methane component. These depleted carbon isotope compositions combined with the presence of abundant sulfide minerals in cap rocks have led to interpretations that invoke microbial sulfate reduction as an important carbonate mineral-yielding process in salt dome environments. Sulfur isotope data from carbonate-associated sulfate (CAS: trace sulfate incorporated within the carbonate mineral crystal lattice) provide a more direct proxy for aqueous sulfate in salt dome systems and may provide a means to directly fingerprint ancient sulfate reduction. We find CAS sulfur isotope compositions (δ34SCAS) significantly greater than those of the precursor Jurassic sulfate-salt deposits (which exhibit δ34S values of ~ +15‰). This implies that cap rock carbonate generation occurred via microbial sulfate reduction under closed-system conditions. The co-occurrence of depleted carbonate d13C values (< ~30‰) and the enriched δ34SCAS values are evidence for sulfate-dependent anaerobic oxidation of methane (AOM). AOM, which has been shown to yield extensive seafloor carbonate authigenesis, is also potentially partly responsible for the carbonate minerals of the Gulf Coast calcite cap rocks through concomitant production of alkalinity. Collectively, these data shed

  16. Estimation of vertical land movement rates along the coasts of the Gulf of Mexico over the past decades

    NASA Astrophysics Data System (ADS)

    Letetrel, C.; Karpytchev, M.; Bouin, M.-N.; Marcos, M.; SantamarÍa-Gómez, A.; Wöppelmann, G.

    2015-12-01

    We estimated the vertical land movement rates at tide gauge stations along the Gulf of Mexico (GOM) coasts. A novel approach suggested by Kuo et al. (2004, 2008) for combining satellite altimetry and tide gauge data was applied. The obtained vertical land motion rates were compared with the GPS vertical velocities measured at Galveston, Grand Isle, Dauphin Island, Pensacola and Key West stations. The estimated vertical rates range from slow subsidence in the South of Florida and Veracruz to high subsidence rates in Texas and Louisiana where some of the tide gauges subside at the rate of up to 7 mm/yr. A small but noticeable uplift in the NE of the Gulf was detected at Cedar Key and Apalachicola and a very low subsidence at Pensacola tide gauge. We suppose there are some local tectonic processes which contribute significantly to the land movement at these stations. Comparison with the post-glacial rebound model ICE5G-VM2 predictions shows that the drivers of the subsidence on the GOM shelf are of local nature. The resulted absolute sea level rise along the GOM coast was estimated to be about 2.0±0.4 mm/yr.

  17. Determination of source ages and migration patterns of brines from the U.S. Gulf Coast basin using 129I

    NASA Astrophysics Data System (ADS)

    Moran, Jean E.; Fehn, Udo; Hanor, Jeffrey S.

    1995-12-01

    The long-lived cosmogenic and fissiogenic isotope 129I has been applied to the study of source ages and migration patterns of oil field brines from the U.S. Gulf Coast basin. 129I/I ratios were measured in sixty samples of saline formation water from depths of 660-4503 m in several oil fields in southeast Texas, south-central Louisiana, and offshore Louisiana. Comparisons between measured ratios and the decay curve for surface hydrospheric 129I result in minimum source ages much older than present host formation ages, indicating vertical migration of brine from older, deeper sources. Conservative corrections for a fissiogenic component due to spontaneous fission of 238U in the subsurface result in the following median source ages: Iberia field: 55 Ma, Port Barre field: 53 Ma, and Eugene Island Blocks 316 and 330: 55 Ma, pointing to Wilcox Group shales as source formations. Mesozoic sources cannot be ruled out, due to the uncertainties in estimating the fissiogenic component. Some of the ratios measured in Texas Gulf Coast brines show evidence of a greater fissiogenic component which indicates that the brines have resided in formations with locally high U concentrations.

  18. First U.S. report of shellfish harvesting closures due to confirmed okadaic acid in Texas Gulf coast oysters.

    PubMed

    Deeds, Jonathan R; Wiles, Kirk; Heideman, Gary B; White, Kevin D; Abraham, Ann

    2010-06-01

    Between March 7 and April 12, 2008, several bay systems on the east (Gulf of Mexico) coast of Texas, USA were closed to the harvesting of oysters (Crassostrea virginica) due to the presence of the DSP (Diarrheic Shellfish Poisoning) toxin okadaic acid in excess of the 20 microg/100 g tissue FDA regulatory guidance level. This was the first shellfish harvesting closure due to the confirmed presence of DSP toxins in US history. Light microscopic cell counts were performed on water samples collected from numerous sampling sites along the Texas Gulf coast where shellfish harvesting occurs. Ultra performance liquid chromatography, electrospray ionization, selected reaction monitoring, mass spectrometry (UPLC/ESI/SRM/MS) was used to detect DSP toxins in oysters. The closures were associated with an extensive bloom of the dinoflagellate Dinophysis cf. ovum. Only okadaic acid (OA) and OA acyl esters were found in shellfish tissues (max. OA eq. levels 47 microg/100 g tissue). OA was also confirmed in a bloom water sample. No illnesses were reported associated with this event. DSP toxins now add to a growing list of phycotoxins, which include those responsible for PSP (paralytic shellfish poisoning), NSP (neurotoxic shellfish poisoning), and ASP (amnesic shellfish poisoning) which must now be monitored for in US coastal waters where shellfish are harvested.

  19. Rock mechanics evaluation of potential repository sites in the Paradox, Permian, and Gulf Coast Basins: Volume 1

    SciTech Connect

    Not Available

    1987-09-01

    Thermal and thermomechanical analyses of a conceptual radioactive waste repository containing commercial and defense high-level wastes and spent fuel have been performing using finite element models. The thermal and thermomechanical responses of the waste package, disposal room, and repository regions were evaluated. four bedded salt formations, in Davis and Lavender Canyons in the Paradox Basin of southeastern Utah and in Deaf Smith and Swisher counties in the Permian Basin of northwestern Texas, and three salt domes, Vacherie Dome in northwestern Louisiana and Richton and Cypress Creek Domes in southeastern Mississippi, located in the Gulf Coast Basin, were examined. In the Paradox Basin, the pressure exerted on the waste package overpack was much greater than the initial in situ stress. The disposal room closure was less than 10 percent after 5 years. Surface uplift was nominal, and no significant thermomechanical perturbation of the aquitards was observed. In the Permian Basin, the pressure exerted on the waste package overpack was greater than the initial in situ stress. The disposal room closures were greater than 10 percent in less than 5 years. Surface uplift was nominal, and no significant thermomechanical perturbation of the aquitards was observed. In the Gulf Coast Basin, the pressure exerted on the waste package overpack was greater than the initial in situ stress. The disposal room closures were greater than 10 percent in less than 5 years. No significant thermomechanical perturbation of the overlying geology was observed. 40 refs., 153 figs., 32 tabs.

  20. Volume and accessibility of entrained (solution) methane in deep geopressured reservoirs - tertiary formations of the Texas Gulf Coast. Final report

    SciTech Connect

    Gregory, A.R.; Dodge, M.M.; Posey, J.S.; Morton, R.A.

    1980-10-01

    The objective of this project was to appraise the total volume of in-place methane dissolved in formation waters of deep sandstone reservoirs of the onshore Texas Gulf Coast within the stratigraphic section extending from the base of significant hydrocarbon production (8000 ft)* to the deepest significant sandstone occurrence. The area of investigation is about 50,000 mi/sup 2/. Factors that determine the total methane resource are reservoir bulk volume, porosity, and methane solubility; the latter is controlled by the temperature, pressure, and salinity of formation waters. Regional assessment of the volume and the distribution of potential sandstone reservoirs was made from a data base of 880 electrical well logs, from which a grid of 24 dip cross sections and 4 strike cross sections was constructed. Solution methane content in each of nine formations or divisions of formations was determined for each subdivision. The distribution of solution methane in the Gulf Coast was described on the basis of five reservoir models. Each model was characterized by depositional environment, reservoir continuity, porosity, permeability, and methane solubility.

  1. Comparison of pollution levels on the Mississippi Gulf Coast during the 2010 Gulf BP oil spill to ecological and health-based standards.

    PubMed

    Beasley, Jerry; Reddy, Ramata S; Tchounwou, Paul; Kafoury, Ramzi

    2012-01-01

    To evaluate the possible impact that the BP Deepwater Horizon Gulf oil spill might have had on pollution levels in the State of Mississippi, the Mississippi Department of Environmental Quality (MDEQ), and the US Environmental Protection Agency (EPA) analyzed surface water and ambient air quality pollutant data taken from MDEQ and EPA monitoring sites on the Mississippi Gulf Coast. The data were compared with acute, chronic, and human health air and water quality standards to determine whether the pollutant levels occurring during the oil spill could cause ecological and/or human health effects. The water quality data indicated levels of nickel, vanadium, volatile organic compounds (VOCs), and semivolatile organic compounds analyzed remained below acute and chronic levels for both aquatic life and human health. The air quality sampling data showed that the levels of VOCs and polycyclic aromatic hydrocarbons associated with the oil spill were well below EPA chronic and human health screening levels. A comparison of the air quality monitoring data taken before and after the oil spill showed that the concentrations of ozone and fine particulate matter were elevated for brief periods but remained below actionable levels.

  2. Chapter 1: Executive Summary - 2003 Assessment of Undiscovered Oil and Gas Resources in the Upper Cretaceous Navarro and Taylor Groups, Western Gulf Province, Gulf Coast Region, Texas

    USGS Publications Warehouse

    ,

    2006-01-01

    The U.S. Geological Survey (USGS) recently completed an assessment of the undiscovered oil and gas potential of the Upper Cretaceous Navarro and Taylor Groups in the Western Gulf Province of the Gulf Coast region (fig. 1) as part of a national oil and gas assessment effort (USGS Navarro and Taylor Groups Assessment Team, 2004). The assessment of the petroleum potential of the Navarro and Taylor Groups was based on the general geologic elements used to define a total petroleum system (TPS), including hydrocarbon source rocks (source rock maturation, hydrocarbon generation and migration), reservoir rocks (sequence stratigraphy and petrophysical properties), and hydrocarbon traps (trap formation and timing). Using this geologic framework, the USGS defined five assessment units (AU) in the Navarro and Taylor Groups as parts of a single TPS, the Smackover-Austin-Eagle Ford Composite TPS: Travis Volcanic Mounds Oil AU, Uvalde Volcanic Mounds Gas and Oil AU, Navarro-Taylor Updip Oil and Gas AU, Navarro-Taylor Downdip Gas and Oil AU, and Navarro-Taylor Slope-Basin Gas AU (table 1).

  3. Effects of winter marsh burning on abundance and nesting activity of Louisiana seaside sparrows in the Gulf Coast Chenier Plain

    USGS Publications Warehouse

    Gabrey, S.W.; Afton, A.D.

    2000-01-01

    Louisiana Seaside Sparrows (Ammodramus maritimus fisheri) breed and winter exclusively in brackish and saline marshes along the northern Gulf of Mexico. Many Gulf Coast marshes, particularly in the Chenier Plain of southwestern Louisiana and southeastern Texas, are burned intentionally in fall or winter as part of waterfowl management programs. Fire reportedly has negatively affected two Seaside Sparrow subspecies (A. m. nigrescens and A. m. mirabilis) in Florida, but there is no published information regarding effects of fire on A. m. fisheri. We compared abundance of territorial male Louisiana Seaside Sparrows, number of nesting activity indicators, and vegetation structure in paired burned and unburned plots in Chenier Plain marshes in southwestern Louisiana during the 1996 breeding season (April-July) before experimental winter burns (January 1997) and again during two breeding seasons post-burn (1997-1998). We found that abundance of male sparrows decreased in burned plots during the first breeding season post-burn, but was higher than that of unburned plots during the second breeding season post-burn. Indicators of nesting activity showed a similar but non-significant pattern in response to burning. Sparrow abundance and nesting activity seemingly are linked to dead vegetation cover, which was lower in burned plots during the first breeding season post-burn, but did not differ from that in unburned plots during the second breeding season post-burn. We recommend that marsh management plans in the Gulf Coast Chenier Plain integrate waterfowl and Seaside Sparrow management by maintaining a mosaic of burned and unburned marshes and allowing vegetation to recover for at least two growing seasons before reburning a marsh.

  4. Reconciling Holocene Sea-Level History on the US Gulf Coast: Is the Mississippi Delta the Rosetta Stone?

    NASA Astrophysics Data System (ADS)

    Tornqvist, T. E.; Gonzalez, J. L.; Newsom, L. A.; van der Borg, K.; de Jong, A. F.; Kurnik, C. W.

    2003-12-01

    The threat of future sea-level rise is a major concern for the US Gulf Coast in general and the Misissippi Delta in particular. Published Holocene relative sea-level (RSL) curves for the US Gulf Coast are in mutual conflict, with some characterized by a smooth RSL rise akin to widely accepted eustatic sea-level curves vs. others, including several recent ones, that are characterized by a conspicuous "stair-step" pattern with prolonged (millennium-scale) RSL stillstands alternating with rapid rises. In addition, recent work in Texas and Alabama has revitalized the notion of a Middle Holocene RSL highstand, estimated at about 2 m above present mean sea level. An extensive sampling program in the Mississippi Delta (Louisiana) focuses on the collection of basal peats that accumulated during the initial transgression of the pre-existing, consolidated Pleistocene basement. We preferentially select plant macrofossils indicative of brackish to saline conditions from these basal peats and subject them to AMS 14C dating. The first data set of approximately 30 sea-level index points from a 20 sq km study area on the eastern margin of the delta provides conclusive evidence that RSL rise followed a smooth, negative exponential trend for the time interval 8000-3000 cal yr BP, thus invalidating the occurrence of RSL stillstands. Although a true Middle Holocene highstand never occurred in this subsiding setting, the high level of detail of our time series enables a rigorous test of this hypothesis. Correction of our data set for a hypothetical subsidence rate of 1.1 m/ka (we assume a linear subsidence rate compared to the tectonically relatively stable adjacent Texas Coast) leads to sea levels of 1-2 m above present during the time interval 6000-4000 cal yr BP. However, this model also implies a RSL position near -2 m around 8000 cal yr BP, which is inconsistent both with data of this age from Texas, as well as with eustatic sea-level data. We therefore conclude that a Middle

  5. Density of total and pathogenic (tdh+) Vibrio parahaemolyticus in Atlantic and Gulf coast molluscan shellfish at harvest.

    PubMed

    Cook, David W; Bowers, John C; DePaola, Angelo

    2002-12-01

    The densities of total and pathogenic Vibrio parahaemolyticus in 671 samples of molluscan shellfish harvested in 1999 and 2000 from 14 sites in seven Gulf and Atlantic coast states were determined at 2-week intervals over a period of 12 to 16 months in each state. Changes in V. parahaemolyticus densities in shellfish between harvest and sample analysis were minimized with time and temperature controls. Densities were measured by direct plating techniques, and gene probes were used for identification. Total and pathogenic V. parahaemolyticus organisms were identified with probes for the thermolabile direct hemolysin (tlh) gene and the thermostable direct hemolysin (tdh) gene, respectively. An enrichment procedure involving 25 g of shellfish was also used for the recovery of pathogenic V. parahaemolyticus. The densities of V. parahaemolyticus in shellfish from all harvest sites were positively correlated with water temperature. Shellfish from the Gulf Coast typically had higher densities of V. parahaemolyticus than did shellfish harvested from the North Atlantic or mid-Atlantic coast. Vibrio parahaemolyticus counts exceeded 1,000 CFU/g for only 5% of all samples. Pathogenic (tdh+) V. parahaemolyticus was detected in approximately 6% of all samples by both procedures, and 61.5% of populations in the positive samples from the direct plating procedure were at the lower limit of detection (10 CFU/g). The frequency of detection of pathogenic V. parahaemolyticus was significantly related to water temperature and to the density of total V. parahaemolyticus. The failure to detect pathogenic V. parahaemolyticus in shellfish more frequently was attributed to the low numbers and uneven distribution of the organism.

  6. Groundwater quality of the Gulf Coast aquifer system, Houston, Texas, 2007-08

    USGS Publications Warehouse

    Oden, Jeannette H.; Oden, Timothy D.; Szabo, Zoltan

    2010-01-01

    In the summers of 2007 and 2008, the U.S. Geological Survey (USGS), in cooperation with the City of Houston, Texas, completed an initial reconnaissance-level survey of naturally occurring contaminants (arsenic, other selected trace elements, and radionuclides) in water from municipal supply wells in the Houston area. The purpose of this reconnaissance-level survey was to characterize source-water quality prior to drinking water treatment. Water-quality samples were collected from 28 municipal supply wells in the Houston area completed in the Evangeline aquifer, Chicot aquifer, or both. This initial survey is part of ongoing research to determine concentrations, spatial extent, and associated geochemical conditions that might be conducive for mobility and transport of these constituents in the Gulf Coast aquifer system in the Houston area. Samples were analyzed for major ions (calcium, magnesium, potassium, sodium, bromide, chloride, fluoride, silica, and sulfate), selected chemically related properties (residue on evaporation [dissolved solids] and chemical oxygen demand), dissolved organic carbon, arsenic species (arsenate [As(V)], arsenite [As(III)], dimethylarsinate [DMA], and monomethylarsonate [MMA]), other trace elements (aluminum, antimony, arsenic, barium, beryllium, boron, cadmium, chromium, cobalt, copper, iron, lead, lithium, manganese, molybdenum, nickel, selenium, silver, strontium, thallium, vanadium, and zinc), and selected radionuclides (gross alpha- and beta-particle activity [at 72 hours and 30 days], carbon-14, radium isotopes [radium-226 and radium-228], radon-222, tritium, and uranium). Field measurements were made of selected physicochemical (relating to both physical and chemical) properties (oxidation-reduction potential, turbidity, dissolved oxygen concentration, pH, specific conductance, water temperature, and alkalinity) and unfiltered sulfides. Dissolved organic carbon and chemical oxygen demand are presented but not discussed in the

  7. Development of predictive models for determining enterococci levels at Gulf Coast beaches.

    PubMed

    Zhang, Zaihong; Deng, Zhiqiang; Rusch, Kelly A

    2012-02-01

    The US EPA BEACH Act requires beach managers to issue swimming advisories when water quality standards are exceeded. While a number of methods/models have been proposed to meet the BEACH Act requirement, no systematic comparisons of different methods against the same data series are available in terms of relative performance of existing methods. This study presents and compares three models for nowcasting and forecasting enterococci levels at Gulf Coast beaches in Louisiana, USA. One was developed using the artificial neural network (ANN) in MATLAB Toolbox and the other two were based on the US EPA Virtual Beach (VB) Program. A total of 944 sets of environmental and bacteriological data were utilized. The data were collected and analyzed weekly during the swimming season (May-October) at six sites of the Holly Beach by Louisiana Beach Monitoring Program in the six year period of May 2005-October 2010. The ANN model includes 15 readily available environmental variables such as salinity, water temperature, wind speed and direction, tide level and type, weather type, and various combinations of antecedent rainfalls. The ANN model was trained, validated, and tested using 308, 103, and 103 data sets (collected in 2007, 2008, and 2009) with an average linear correlation coefficient (LCC) of 0.857 and a Root Mean Square Error (RMSE) of 0.336. The two VB models, including a linear transformation-based model and a nonlinear transformation-based model, were constructed using the same data sets. The linear VB model with 6 input variables achieved an LCC of 0.230 and an RMSE of 1.302 while the nonlinear VB model with 5 input variables produced an LCC of 0.337 and an RMSE of 1.205. In order to assess the predictive performance of the ANN and VB models, hindcasting was conducted using a total of 430 sets of independent environmental and bacteriological data collected at six Holly Beach sites in 2005, 2006, and 2010. The hindcasting results show that the ANN model is capable of

  8. Quality of the surface sediments of the northern coast of the Gulf of Finland, Baltic Sea.

    PubMed

    Vallius, Henry

    2015-10-15

    The Gulf of Finland is a shallow sea where a multitude of activities compete of space. Many of the activities include reworking of the sea floor. The gulf is known to have been rather largely contaminated by heavy metals during the last century, and although indications of recovery have been reported, it is crucial to know the levels of sea floor sediment contamination before any decisions of activities are taken by the authorities. In order to predict sediment toxicity the sediment concentrations acquired during a study from 2001 to 2004 are compared to Canadian sediment quality guidelines (SQG: s), which reveal that in the majority of the subsamples the metals and arsenic exceed the threshold levels of the used SQG: s, some exceed also the probable effect level. As, Cd, Hg, and especially Zn concentrations occur at unacceptably high levels in the coastal Gulf of Finland sediments.

  9. The gulf stream off the east coast of the United States

    NASA Astrophysics Data System (ADS)

    Bane, John M.

    1988-12-01

    Current and temperature data from a one-year-long instrument deployment in the region just northeast of Cape Hatteras have shown the oceanic variability to be, intense and quite complex. Changes in the position of the Gulf Stream’s path were observed to occur following cold core Gulf Stream passages through the area. The time between these changes was a few months. The Gulf Stream jet itself was seen to meander in a manner previously observed, as long as it was not undergoing a strong ring/stream interaction. Several isolated vortices progressed through the array, with the majority of them being in the submesoscale coherent vortex class. Two mid-depth, anticyclonic warm eddies progressed through the array. It is likely the two events were caused by two different transits of the same eddy. The deep waters below the main thermocline oscillated as topographic Rossby waves progressed through the array area.

  10. Ichthyoplankton assemblages in the Gulf of Nicoya and Golfo Dulce embayments, Pacific coast of Costa Rica.

    PubMed

    Molina-Ureña, H

    1996-12-01

    Ichthyoplankton surveys were conducted in December (rainy season), 1993 and February (dry season), 1994, during the RV Victor Hensen German-Costa Rican Expedition to the Gulf of Nicoya and Gulfo Dulce, Costa Rica. Samples from the inner, central, and outer areas of each gulf were collected in oblique tows with a bongo net of 0.6 m mouth diameter, 2.5 m long and 1000-micron mesh. A total of 416 fish larvae of 22 families were sorted out of 14 samples. Stations of both the maximum (11) and the minimum (1) family richness were located in Golfo Dulce. Mean total larval abundances were 124.9 and 197.2 individuals 10 m-2 for the Gulf of Nicoya and Golfo Dulce, respectively, while mean larval densities ranged from 95.3 larvae 10 m-2 in December to 236.7 larvae 10 m-2 in February. However, no statistical differences between gulfs or seasons were detected, due to the high within-group variability. Cluster Analysis, Multi-Dimensional Scaling (MDS), and non-parametric tests showed two well-defined major groups: (1) the Gulf of Nicoya neritic assemblage, represented by Engraulids, Sciaenids, and Gobiids (inner and central stations), and (2) the oceanic assemblage, dominated by Myctophids, Bregmacerotids, Ophiidids, and Trichiurids (outer stations off the Gulf of Nicoya and Golfo Dulce). A third, although less defined group, was an Ophichthid-dominated assemblage (typical in areas nearby coral or rocky reefs). These assemblages closely resemble the clusters based upon adult fish data of the beamtrawl catches of the same cruise. This publication is the first to report on the ichthyoplankton community of Golfo Dulce.

  11. Born in Hope and Controversy: The Challenges of Infusing Sustainability in the Campus Operations and Curriculum at Florida Gulf Coast University

    ERIC Educational Resources Information Center

    Wohlpart, A. James; Shepard, Joseph; Corcoran, Peter Blaze

    2009-01-01

    Florida Gulf Coast University, located in southwest Florida in the United States, opened its doors in 1997 with approximately 1,500 students as the tenth institution in the State University System. The site of the campus was a topic of disagreement between proponents of economic growth and development and proponents of sustainability and…

  12. CO2 source-sink matching in the lower 48 United States, with examples from the Texas Gulf Coast and Permian Basin

    NASA Astrophysics Data System (ADS)

    Ambrose, W. A.; Breton, C.; Holtz, M. H.; Núñez-López, V.; Hovorka, S. D.; Duncan, I. J.

    2009-06-01

    Documenting geographic distribution and spatial linkages between CO2 sources and potential sinks in areas with significant levels of CO2 emissions is important when considering carbon-management strategies such as geologic sequestration or enhanced oil recovery (EOR). For example, the US Gulf Coast overlies a thick succession (>6,000 m [>20,000 ft]) of highly porous and permeable sandstone formations separated by thick, regionally extensive shale aquitards. The Gulf Coast and Permian Basin also have a large potential for EOR, in which CO2 injected into suitable oil reservoirs could be followed by long-term storage of CO2 in nonproductive formations below reservoir intervals. For example, >6 billion barrels (Bbbl) of oil from 182 large reservoirs is technically recoverable in the Permian Basin as a result of miscible-CO2 flooding. The Gulf Coast also contains an additional 4.5 Bbbl of oil that could be produced by using miscible CO2. Although the CO2 pipeline infrastructure is well-developed in the Permian Basin, east Texas and the Texas Gulf Coast may have a greater long-term potential for deep, permanent storage of CO2 because of thick brine-bearing formations near both major subsurface and point sources of CO2.

  13. Katrina's Castaways: Driven Far from Their Gulf Coast Homes by Hurricane Katrina, Six Children and Their Families Struggle to Pick Up Their Lives at Home and in School

    ERIC Educational Resources Information Center

    Viadero, Debra

    2006-01-01

    Hurricane Katrina, the disastrous storm that struck the Gulf Coast in late August of 2006, displaced an estimated 1 million people. Historians are already calling the resulting exodus of families from hard-hit communities in Louisiana and Mississippi the greatest mass migration in the United States since the Civil War. The diaspora extended north…

  14. Assessment of undiscovered oil and gas resources of the Upper Cretaceous Austin Chalk and Tokio and Eutaw Formations, Gulf Coast, 2010

    USGS Publications Warehouse

    Pearson, Krystal; Dubiel, R.F.; Pearson, O.N.; Pitman, J.K.

    2011-01-01

    Using a geology-based assessment methodology, the U.S. Geological Survey estimated means of 957 million barrels of undiscovered oil, 3.6 trillion cubic feet of undiscovered natural gas, and 363 million barrels of undiscovered natural gas liquids in the Austin Chalk and Tokio and Eutaw Formations in onshore lands and State waters of the Gulf Coast.

  15. Arsenic and radionuclide occurrence and relation to geochemistry in groundwater of the Gulf Coast Aquifer System in Houston, Texas, 2007–11

    USGS Publications Warehouse

    Oden, Jeannette H.; Szabo, Zoltan

    2016-03-21

    Associated geochemical conditions conducive for mobility of arsenic and radionuclides and their spatial and vertical extent in the Gulf Coast aquifer system in Houston are important aspects to the areal management of the municipal groundwater supplies in Houston. Ongoing research is seeking to define chemical or geological factors that are the optimal indicators for elevated concentrations of these naturally occurring constituents.

  16. Katrina's Castaways: Driven Far from Their Gulf Coast Homes by Hurricane Katrina, Six Children and Their Families Struggle to Pick Up Their Lives at Home and in School

    ERIC Educational Resources Information Center

    Viadero, Debra

    2006-01-01

    Hurricane Katrina, the disastrous storm that struck the Gulf Coast in late August of 2006, displaced an estimated 1 million people. Historians are already calling the resulting exodus of families from hard-hit communities in Louisiana and Mississippi the greatest mass migration in the United States since the Civil War. The diaspora extended north…

  17. INCIDENCE OF STRESS IN BENTHIC COMMUNITIES ALONG THE U.S. ATLANTIC AND GULF OF MEXICO COASTS WITHIN DIFFERENT RANGES OF SEDIMENT CONTAMINATION FROM CHEMICAL MIXTURES

    EPA Science Inventory

    Synoptic data on concentrations of sediment-associated chemical contaminants and benthic macroinfaunal community structure were collected from 1,389 stations in estuaries along the U.S. Atlantic and Gulf of Mexico coasts as part of the nationwide Environmental Monitoring and Asse...

  18. INCIDENCE OF STRESS IN BENTHIC COMMUNITIES ALONG U.S. ATLANTIC AND GULF OF MEXICO COASTS WITHIN DIFFERENT RANGES OF SEDIMENT CONTAMINATION FROM CHEMICAL MIXTURES

    EPA Science Inventory

    Synoptic data on concentrations of sediment-associated chemical contaminants and benthic macroinfaunal community structure were collected from 1,389 stations in estuaries along the U.S. Atlantic and Gulf of Mexico coasts as part of the nationwide Environmental Monitoring and Asse...

  19. A Comparison of Enrollments in Gulf Coast Junior College vs Lower Division Enrollments in the Eight State Universities and Other Junior Colleges.

    ERIC Educational Resources Information Center

    Mississippi Gulf Coast Junior Coll., Perkinston.

    This report compares the 1980-81 freshman and sophomore enrollments at Mississippi Gulf Coast Junior College (MGCJC) with the 1979-80 lower-division enrollments at Mississippi's eight state universities and with the fall 1980 enrollments at the state's 15 other junior colleges. In the report six comparisons are made. First, MGCJC is compared with…

  20. PREDICTING BENTHIC STRESS IN RELATION TO SEDIMENT CONTAMINATION FROM INTEGRATED ASSESSMENTS ALONG THE U.S. ATLANTIC AND GULF OF MEXICO COASTS

    EPA Science Inventory

    Matching data on sediment contaminants and macroinfauna from 1,349 samples collected in estuaries along the U.S. Atlantic and Gulf of Mexico coasts were used to estimate risks of bioeffects from multiple-contaminant exposure. Sediment contamination was expressed as the mean ratio...

  1. INCIDENCE OF STRESS IN BENTHIC COMMUNITIES ALONG THE U.S. ATLANTIC AND GULF OF MEXICO COASTS WITHIN DIFFERENT RANGES OF SEDIMENT CONTAMINATION FROM CHEMICAL MIXTURES

    EPA Science Inventory

    Synoptic data on concentrations of sediment-associated chemical contaminants and benthic macroinfaunal community structure were collected from 1,389 stations in estuaries along the U.S. Atlantic and Gulf of Mexico coasts as part of the nationwide Environmental Monitoring and Asse...

  2. INCIDENCE OF STRESS IN BENTHIC COMMUNITIES ALONG U.S. ATLANTIC AND GULF OF MEXICO COASTS WITHIN DIFFERENT RANGES OF SEDIMENT CONTAMINATION FROM CHEMICAL MIXTURES

    EPA Science Inventory

    Synoptic data on concentrations of sediment-associated chemical contaminants and benthic macroinfaunal community structure were collected from 1,389 stations in estuaries along the U.S. Atlantic and Gulf of Mexico coasts as part of the nationwide Environmental Monitoring and Asse...

  3. Factors Influencing Nitrogen-Chorophyll Relationships for Ten Estuaries on the U.S. Atlantic and Gulf of Mexico Coasts (NEERS 08)

    EPA Science Inventory

    Regression relationships between summer concentrations of total (inorganic + organic) nitrogen and phytoplankton chlorophyll a in surface water have been developed for nine estuaries on the U.S. Atlantic coast and one adjacent to the Gulf of Mexico. Four of these systems are estu...

  4. Notice to nurserymen of the naming and release for propagation of Spiers, a tung tree cultivar for tung oil production in the Gulf Coast Region

    USDA-ARS?s Scientific Manuscript database

    The USDA-ARS Southern Horticultural Research Unit in Poplarville, MS has released Vernicia fordii ‘Spiers’, a new tung tree for tung oil production in the Gulf Coast region. This cultivar is recommended for trial by farmers for tung nut production in USDA cold hardiness zones 8 through 10, particula...

  5. Born in Hope and Controversy: The Challenges of Infusing Sustainability in the Campus Operations and Curriculum at Florida Gulf Coast University

    ERIC Educational Resources Information Center

    Wohlpart, A. James; Shepard, Joseph; Corcoran, Peter Blaze

    2009-01-01

    Florida Gulf Coast University, located in southwest Florida in the United States, opened its doors in 1997 with approximately 1,500 students as the tenth institution in the State University System. The site of the campus was a topic of disagreement between proponents of economic growth and development and proponents of sustainability and…

  6. Airborne Hyperspectral and Satellite Multispectral Imagery of the Mississippi Gulf Coast Region

    DTIC Science & Technology

    2006-12-01

    A High-frequency sonar is scattered by sediment and ultimately makes detection of mines harder. Kunte et. al. (2005) points out that suspended...August 2006 Kunte , P.D. Zhao, C. Osawa, T. Sugimori, Y. Sediment distribution study in the Gulf of Kachchh, India, from 3D hydrodynamic model

  7. ECOLOGICAL CONDITION OF THE ESTUARIES OF THE ATLANTIC AND GULF COASTS OF THE UNITED STATES.

    EPA Science Inventory

    Monitoring the estuaries of the Atlantic and Gulf of Mexico coastlines from Cape Cod, MA to Brownsville, TX was performed annually from 1990-1997 to assess ecological conditions on a regional basis for four biogeographic provinces. These province estimates - Virginian, Carolinia...

  8. 78 FR 55064 - Solicitation for Members of the NOAA Science Advisory Board (SAB) Gulf Coast Ecosystem...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-09

    ... National Oceanic and Atmospheric Administration Solicitation for Members of the NOAA Science Advisory Board... Oceanic and Atmospheric Administration (NOAA), Office of Oceanic and Atmospheric Research. ACTION: Notice... Administration is publishing this notice to solicit nominations for the NOAA Science Advisory Board Gulf...

  9. The effects of oil spill and clean-up on dominant US Gulf coast marsh macrophytes: a review.

    PubMed

    Pezeshki, S R; Hester, M W; Lin, Q; Nyman, J A

    2000-05-01

    The objective of this review was to synthesize existing information regarding the effects of petroleum hydrocarbons on marsh macrophytes in a manner that will help guide research and improve spill-response efficiency. Petroleum hydrocarbons affect plants chemically and physically. Although plants sometime survive fouling by producing new leaves, even relatively non-toxic oils can stress or kill plants if oil physically prevents plant gas-exchange. Plant sensitivity to fouling varies among species and among populations within a species, age of the plant, and season of spill. Physical disturbance and compaction of vegetation and soil associated with clean-up activities following an oil spill appear to have detrimental effects on the US Gulf coast marshes. Other techniques, including the use of chemicals such as cleaners or bioremediation, may be necessary to address the problem. Clean-up may also be beneficial when timely removal prevents oil from migrating to more sensitive habitats.

  10. Final Project Closeout Report for Sprint Hydrogen Fuel Cell (HFC) Deployment Project in California, Gulf Coast and Eastern Seaboard Markets

    SciTech Connect

    Kenny, Kevin; Bradley, Dwayne

    2015-09-01

    Sprint is one of the telecommunications industry leaders in the deployment of hydrogen fuel cell (HFC) systems to provide backup power for their mission critical wireless network facilities. With several hundred fuel cells commissioned in California, states in the gulf coast region, and along the upper eastern seaboard. A strong incentive for advancing the integration of fuel cells into the Sprint network came through the award of a Department of Energy (DOE) grant focused on Market Transformation activities for project (EE0000486). This grant was funded by the 2009 American Recovery and Reinvestment Act (ARRA). The funding provided by DOE ($7.295M) was allocated to support the installation of 260 new HFC systems, equipped with an on-site refillable Medium Pressure Hydrogen Storage Solution (MPHSS), as well as for the conversion of 21 low pressure hydrogen systems to the MPHSS, in hopes of reducing barriers to market acceptance.

  11. A new Holocene sea-level database for the US Gulf Coast: Improving constraints for past and future sea levels

    NASA Astrophysics Data System (ADS)

    Hijma, M.; Tornqvist, T. E.; Hu, P.; Gonzalez, J.; Hill, D. F.; Horton, B. P.; Engelhart, S. E.

    2011-12-01

    The interpretation of present-day sea-level change, as well as the prediction of future relative sea-level (RSL) rise and its spatial variability, depend increasingly on the ability of glacial isostatic adjustment (GIA) models to reveal non-eustatic components of RSL change. GIA results from the redistribution of mass due to the growth and decay of ice sheets. As a consequence, formerly ice-covered areas are still rebounding and currently experience RSL fall, while in other areas the rate of RSL rise is enhanced due to glacial forebulge collapse. The development of GIA models relies to a large extent on the availability of quality-controlled Holocene RSL data. There is thus an urgent need for systematically compiled and publicly available databases of geological RSL data that can be used not only for the purposes mentioned above, but also can serve to underpin coastal management and policy decisions. We have focused our efforts to develop a Holocene sea-level database for the Atlantic and Gulf coasts of the US. Many of the research problems that can be addressed with this sea-level database revolve around the identification of crustal motions due to glacial forebulge collapse that affects the entire region and likely extends beyond South Florida. For the east coast, GIA-related subsidence rates have been calculated with unprecedented precision: <0.8 mm a-1 in Maine, increasing to rates of 1.7 mm a-1 in Delaware, and a return to rates <0.9 mm a-1 in the Carolinas. Here, we first define our methodology to reconstruct RSL, with particular reference to the quantification of age and elevation errors. Many sea-level indicators are related to a specific tide level (e.g., peat that formed between highest astronomical tide and mean high water level). We use paleotidal modeling to account for any changes during the Holocene. We furthermore highlight a number of errors associated with 14C dating that have rarely, if ever, been considered in previous studies of this nature

  12. Geohydrology and simulated effects of withdrawals on the Miocene aquifer system in the Mississippi Gulf Coast area

    USGS Publications Warehouse

    Sumner, D.M.; Wasson, B.E.; Kalkhoff, S.J.

    1987-01-01

    Intense development of the Miocene aquifer system for water supplies along the Mississippi Gulf Coast has resulted in large water level declines that have altered the groundwater flow pattern in the area. Water levels in some Miocene aquifers have declined about 2 ft/year since 1940; declines exceed 100 ft (80 ft sea level) in large areas along the coast. Water levels in the surficial aquifer system, generally less than 20 ft below land surface, have not declined. The Miocene and younger interbedded and lenticular sands and clays crop out in southern Mississippi and dip to the south and southwest. These sediments have large vertical variations in head and locally respond to stresses as separate aquifers. Freshwater recharge to the Miocene aquifer system primarily is from rainfall on the surficial aquifers. The water generally moves to the south and southeast along the bedding planes toward the Mississippi Gulf Coast where the water is either withdrawn by wells, discharges to the ocean, or gradually percolates upward into overlying aquifers. Drawdowns caused by large groundwater withdrawals along the coast probably have resulted in the gradual movement of the saltwater toward the pumping centers. In parts of the Miocene aquifer system commonly used for water supplies, the water generally is a sodium bicarbonate type. Increasing chloride concentrations in a few wells indicate that saline water is migrating into parts of all layers in the Pascagoula area. A quasi three-dimensional numerical model of the groundwater flow system was constructed and calibrated on the basis of the both pre- and post-development conditions. The effects of an expected 1.5% annual increase in groundwater withdrawals during the period 1985-2005 were evaluated by the flow model. Additional water level declines expected by the year 2005 in response to estimated pumpage are as follows: Gulfport, 135 ft in layer 4; Biloxi-Gulfport area, 100 ft in layer 5 and 50 ft in layer 3; Pascagoula area, 40

  13. Ground-water flow in the Gulf Coast aquifer systems, south central United States; a preliminary analysis

    USGS Publications Warehouse

    Williamson, A.K.; Grubb, H.F.; Weiss, J.S.

    1990-01-01

    A major objective of the Gulf Coast Regional Aquifer-System Analysis is to use digital models of regional groundwater flow systems to develop better understanding and to improve management of the resource. Modeling is used to synthesize information about the aquifer systems and to test hypotheses about the relative importance of the components of the systems. The 290,000-sq mile study area in the Gulf of Mexico Coastal Plain includes the Mississippi embayment, Gulf Coastal Plain of Texas, and the Continental Shelf that are underlain by deposits of Tertiary and younger age, which contain fresh and saline water. A 10-layer, finite-difference, variable density model, with blocks 10 miles on a side, was used to simulate groundwater flow before development and in 1980, assuming steady- state conditions. Preliminary results indicate that the major factors controlling predevelopment regional flow are the topography, land-surface outcrop pattern, and geometry of aquifers and confining units. Geologic structure and the distribution of precipitation were less significant factors. The density of saline water in the deeper parts of the aquifer system probably has a substantial effect on regional groundwater flow that extends into the freshwater part of the system. Variable water density may be a significant driving force that transports salt great distances in many directions, including updip. The distribution and rates of regional recharge and discharge have been substantially changed by development. Groundwater pumpage in 1980 was about five times the value of predevelopment regional recharge. About 80% of the pumpage was supplied from increased regional recharge. Also resistance to vertical flow caused by many fine-grained beds within the permeable zones can be as important as resistance caused by regional confining units. (USGS)

  14. Storm surge simulation along the U.S. East and Gulf Coasts using a multi-scale numerical model approach

    NASA Astrophysics Data System (ADS)

    Xu, Hongzhou; Zhang, Keqi; Shen, Jian; Li, Yuepeng

    2010-12-01

    The effectiveness of simulating surge inundation using the Eulerian-Lagrangian circulation (ELCIRC) model over multi-scale unstructured grids was examined in this study. The large domain model grid encompasses the western North Atlantic Ocean, the Gulf of Mexico, and the Caribbean Sea to appropriately account for remote and resonance effects during hurricane events and simplify the specification of the open boundary condition. The U.S. East and Gulf Coasts were divided into 12 overlapping basins with fine-resolution (up to 30 × 30 m) grids to model overland surge flooding. These overlapping basins have different fine-resolution grids near the coastal region, but have an identical coarse-resolution grid in the offshore region within the large model domain. Thus, the storm surge prediction can be conducted without reducing computation efficiency by executing multiple model runs with local fine-resolution grids where potential hurricane landfalls may occur. The capability of the multi-scale approach was examined by simulating storm surge caused by Hurricanes Andrew (1992) and Isabel (2003) along the South Florida coast and in the Chesapeake Bay. Comparisons between simulated and observed results suggest that multi-scale models proficiently simulated storm surges in the Biscayne Bay and the Chesapeake Bay during two hurricanes. A series of sensitivity tests demonstrated that the simulation of surge flooding was improved when LiDAR topographic data and special bottom drag coefficient values for mangrove forests were employed. The tests also showed that appropriate representation of linear hydrologic features is important for computing surge inundation in an urban area.

  15. Mafic Volcanism Along the Sinaloa Coast, Mexico, and its Relation to the Opening of the Gulf of California

    NASA Astrophysics Data System (ADS)

    Orozco Esquivel, T.; Ferrari, L.; Lopez Martinez, M.

    2007-05-01

    We report on new localities with mafic volcanism along the Sinaloa coast, which record changes in the magma generation processes along the eastern margin of the Gulf of California. South of Culiacán, Sinaloa, isolated outcrops of basaltic lavas built a ca. 60 km long belt aligned to the SE. The similarity in the mineralogy and composition of the lavas suggest that these outcrops could have been part of a single flow. Lavas contain abundant plagioclase (up to 3 mm), and olivine (up to 1.5 mm) phenocrysts, and scarce clinopyroxene, in a relatively coarse matrix. In multiement diagrams, the lavas show the negative Nb and Ta, and positive Pb and Sr anomalies characteristic of subduction related rocks. The age determination of these rocks is in process, nevertheless, rocks with similar compositions are known from ~11 Ma mafic dikes that outcrop in southern Sinaloa. The Pericos volcanic field, located about 25 km to the NW of Culiacán is composed by lava flows, shield volcanoes, and cinder cones of basaltic composition that cover an area of aprox. 20 x 32 km, and have a well preserved morphology suggestive of a Pliocene-Quaternary age. Lavas are porphyritic and contain olivine, plagioclase and clinopyroxene in a microcrystalline matrix. Some lava flows contain abundant megacrysts of green clinopyroxene (up to 8 cm), olivine (up to 1 cm), and/or plagioclase (up to 1 cm), or aggregates of olivine and clinopyroxene. Trace element abundances are remarkably uniform among all analyzed samples and are characteristic of intraplate magmas. Rocks with very similar composition, mineralogy, and also containing megacrysts, have been reported in the Pliocene Punta Piaxtla and Mesa Cacaxtla, located 200 km to the SSE at the Sinaloa coast. Those similarities indicate that mafic intraplate volcanism related to the opening of the Gulf of California is more broadly represented in the area than previously considered.

  16. Climate projections of spatial variations in coastal storm surges along the Gulf of Mexico and U.S. east coast

    NASA Astrophysics Data System (ADS)

    Yao, Zhigang; Xue, Zuo; He, Ruoying; Bao, Xianwen; Xie, Jun; Ge, Qian

    2017-02-01

    Using statistically downscaled atmospheric forcing, we performed a numerical investigation to evaluate future climate's impact on storm surges along the Gulf of Mexico and U.S. east coast. The focus is on the impact of climatic changes in wind pattern and surface pressure while neglecting sea level rise and other factors. We adapted the regional ocean model system (ROMS) to the study region with a mesh grid size of 7-10 km in horizontal and 18 vertical layers. The model was validated by a hindcast of the coastal sea levels in the winter of 2008. Model's robustness was confirmed by the good agreement between model-simulated and observed sea levels at 37 tidal gages. Two 10-year forecasts, one for the IPCC Pre-Industry (PI) and the other for the A1FI scenario, were conducted. The differences in model-simulated surge heights under the two climate scenarios were analyzed. We identified three types of responses in extreme surge heights to future climate: a clear decrease in Middle Atlantic Bight, an increase in the western Gulf of Mexico, and non-significant response for the remaining area. Such spatial pattern is also consistent with previous projections of sea surface winds and ocean wave heights.

  17. Risk Amid Recovery: Occupational Health and Safety of Latino Day Laborers in the Aftermath of the Gulf Coast Hurricanes

    PubMed Central

    Delp, Linda; Podolsky, Laura; Aguilar, Tomás

    2011-01-01

    After Katrina, the Bush administration suspended Department of Labor workplace regulations throughout the Gulf, a move consistent with their general emphasis on voluntary workplace protection programs rather than government oversight. This approach left many workers in hurricane reconstruction jobs unprotected, especially Latino immigrant day laborers who, facing language barriers and legal constraints, were least able to negotiate workplace safety or other labor conditions. Fifty-three immigrant workers and 28 key informants from community, union, church, and relief organizations in Louisiana and Mississippi were interviewed at job hiring sites and relief organizations using an inductive, exploratory approach. In this multihazard and changing work environment with a new and fluctuating workforce, enforceable policies mandating worker protection and education were sorely lacking. Free market conditions, driven by incentives to work as fast as possible, and the preponderance of unregulated small contractors and individual home owners as employers contributed to the unsafe environment. Although workers and home owners attempted to take precautions, they usually lacked adequate education about hazards, access to protective equipment, and training in its proper use. However, the labor conditions during the hurricane recovery in the Gulf Coast are likely to be duplicated throughout the country in workplaces employing Latino day laborers unless workers' health is given greater priority by regulatory agencies. PMID:21394225

  18. Characterization of Isolates of Streptococcus agalactiae from Diseased Farmed and Wild Marine Fish from the U.S. Gulf Coast, Latin America, and Thailand.

    PubMed

    Soto, Esteban; Wang, Rui; Wiles, Judy; Baumgartner, Wes; Green, Christopher; Plumb, John; Hawke, John

    2015-06-01

    We examined Lancefield serogroup B Streptococcus isolates recovered from diseased, cultured hybrid Striped Bass (Striped Bass Morone saxatilis × White Bass M. chrysops) and wild and cultured Gulf Killifish Fundulus grandis from coastal waters of the U.S. Gulf of Mexico (Gulf coast) and compared those isolates to strains from tilapias Oreochromis spp. reared in Mississippi, Thailand, Ecuador, and Honduras and to the original Gulf coast strain identified by Plumb et al. ( 1974 ). The isolates were subjected to phylogenetic, biochemical, and antibiotic susceptibility analyses. Genetic analysis was performed using partial sequence comparison of (1) the 16S ribosomal RNA (rRNA) gene; (2) the sipA gene, which encodes a surface immunogenic protein; (3) the cspA gene, which encodes a cell surface-associated protein; and (4) the secY gene, which encodes components of a general protein secretion pathway. Phylogenies inferred from sipA, secY, and cspA gene sequence comparisons were more discriminating than that inferred from the 16S rRNA gene sequence comparison. The U.S. Gulf coast strains showed a high degree of similarity to strains from South America and Central America and belonged to a unique group that can be distinguished from other group B streptococci. In agreement with the molecular findings, biochemical and antimicrobial resistance analyses demonstrated that the isolates recovered from the U.S. Gulf coast and Latin America were more similar to each other than to isolates from Thailand. Three laboratory challenge methods for inducing streptococcosis in Gulf Killifish were evaluated-intraperitoneal (IP) injection, immersion (IMM), and immersion plus abrasion (IMMA)-using serial dilutions of S. agalactiae isolate LADL 97-151, a representative U.S. Gulf coast strain. The dose that was lethal to 50% of test fish by 14 d postchallenge was approximately 2 CFU/fish via IP injection. In contrast, the fish that were challenged via IMM or IMMA presented cumulative mortality

  19. Surface temperatures and temperature gradient features of the US Gulf Coast waters

    NASA Technical Reports Server (NTRS)

    Huh, O. K.; Rouse, L. J., Jr.; Smith, G. W.

    1977-01-01

    Satellite thermal infrared data on the Gulf of Mexico show that a seasonal cycle exists in the horizontal surface temperature structure. In the fall, the surface temperatures of both coastal and deep waters are nearly uniform. With the onset of winter, atmospheric cold fronts, which are accompanied by dry, low temperature air and strong winds, draw heat from the sea. A band of cooler water forming on the inner shelf expands, until a thermal front develops seaward along the shelf break between the cold shelf waters and the warmer deep waters of the Gulf. Digital analysis of the satellite data was carried out in an interactive mode using a minicomputer and software. A time series of temperature profiles illustrates the temporal and spatial changes in the sea-surface temperature field.

  20. Cleaning of the ocean floor near offshore platforms in the Gulf coast

    SciTech Connect

    Fang, C.S.; Smith, S.A. Jr.

    1986-03-01

    For decades in offshore drilling, the drill cuttings were separated from the circulating drilling fluid by the shale shaker and hydrocyclone, and discharged to the ocean. The drilling fluid itself was discharged to the ocean intermittently to maintain its required properties during the drilling process. These discharges contain many environmentally undesirable chemicals, such as hydrocarbons chemical additives and heavy metals. As a result, the ocean floor near some of the offshore platforms in the Gulf of Mexico are covered by contaminated sediment. Ocean current is not as effective in washing out the discarded ocean muds as previously believed. An attempt was made to clean some of the offshore platforms in the Gulf of Mexico. The quantity and characteristics of the drilling discharges are estimated the technology used to clean the ocean floor near platforms is described, and advanced treatments for hydrocarbon removal, chemical oxidation and activated carbon adsorption, are discussed. 8 references.

  1. Antioxidant Activity, Total Phenolics and Flavonoid Contents of some Edible Green Seaweeds from Northern Coasts of the Persian Gulf

    PubMed Central

    Farasat, Massoumeh; Khavari-Nejad, Ramazan-Ali; Nabavi, Seyed Mohammad Bagher; Namjooyan, Foroogh

    2014-01-01

    The antioxidant activity, contents of total phenolics and flavonoids were quantified in the methanolic extracts of four Ulva species (Ulva clathrata (Roth) C.Agardh, Ulva linza Linnaeus, Ulva flexuosa Wulfen and Ulva intestinalis Linnaeus) grown at different parts of northern coasts of the Persian Gulf in south of Iran. The seaweeds were collected from Dayyer, Taheri and Northern Ouli coasts in April 2011. Methanolic extracts of the seaweeds were assessed for their antioxidant activity using DPPH radical scavenging assay and was performed in a microplate reader. All species exhibited a DPPH radical scavenging activity, and among the species, Ulva clathrata demonstrated greater antioxidant potential with a low IC50 (0.881 mg mL-1) in comparison with those of the other species. Also the highest phenolic content (5.080 mg GAE g-1) and flavonoid content (33.094 mg RE g-1) were observed in U.clathrata. Total phenolic and flavonoid contents showed positive correlations with the DPPH radical scavenging activity (p < 0.01) and negative correlations with IC50 (p < 0.01).The results suggest that these edible green seaweeds possess antioxidant potential which could be considered for future applications in medicine, dietary supplements ,cosmetics or food industries. PMID:24734068

  2. Modeling of storm-induced deformations of a sandy coast (based on the example of the eastern Gulf of Finland)

    NASA Astrophysics Data System (ADS)

    Leont'yev, I. O.; Ryabchuk, D. V.; Sergeev, A. Yu.

    2015-02-01

    An improved version of the CROSS-P model for the simulation of storm-induced deformations in coastal profiles is suggested. It is shown that the model reproduces the formation of the erosion profile adequately both in the laboratory and field conditions. Though the main features of the accretion profile are also reflected in the model, further testing based on more relevant data is needed. The profile types predicted by the model agree with the well-known empirical criterion. An important new step is that the foredune overflow effect caused by storm surges is also included into the model. The model is applied to the coasts of the eastern Gulf of Finland exposed to high storm surges. This makes it possible to present the coast change as a result of a conveyor delivering sand material from the foredune to the beach under the impact of extreme storms. During the periods of low wave activity, this conveyor transports the beach material to the underwater slope. The sediment conveyer works only in one direction; thus, the losses of the dune material turn out to be irreversible. Modeling shows that, during the foredune overflow process (typical for the southern segment of the studied area), a certain amount of sediments is carried on to the rear dune slope, and the dune belt gradually moves inland simultaneously decreasing in height. It is expected that the destructive trends in the coastal evolution will continued within the nearest decades.

  3. Radioactivity concentrations in sediments on the coast of the Iranian province of Khuzestan in the Northern Persian Gulf.

    PubMed

    Pourahmad, Jalal; Motallebi, Abbasali; Asgharizadeh, Farid; Eskandari, Gholam Reza; Shafaghi, Bijan

    2008-10-01

    Gamma-ray spectrometric analyses were performed on sediment samples from the coast of Khuzestan province (south west of Iran, neighbor to Iraq and Kuwait) to study the concentration of natural as well as man-made radioactive sources. The coast of Khuzestan, which extends for approximately 400 km is mainly soft areas of mud flats within different ecosystems including river mouth, estuaries, creeps, and small bays. Suspended material from the Iranian rivers including Arvand (Karun), Bahmanshir, Jarrahi, and Zohreh has settled to form these extensive soft areas. Eighty three samples were taken at different points along the coast in undisturbed areas at intervals of about 5 km since Fall 2005 to Winter 2006. Collection was carried out during low-tide, where it was possible to collect sediments from the wet region that was covered by sea water during the high tide. At each of the sample sites, a sampling area of about 1 m(2) was considered. All samples were of a muddy nature, and were left to dry in open air before drying in the oven at 105 degrees C for 2-3 days to remove all water content. The average activity concentration of the radionuclides (226)Ra (30 Bq/Kg), (232)Th (11 Bq/kg), (238)U (18 Bq/kg), and (137)Cs (2.6 Bq/kg) along the shore of Khuzestan reaches are much less than the values commonly assigned as the world average. Nevertheless in case of (40)K which is a long lived naturally occurring radionuclide, the result (481 Bq/kg) was higher than the world average which could be due to a large Kuwaiti oil spill and also fallout and deposition of tremendous amount of fly ashes which resulted from ignited Kuwaiti oil fields during the 2nd Persian Gulf war (1990-91). For man-made (137)Cs and naturally occurring (232)Th, the western and eastern parts of Khuzestan shore showed higher concentrations than the middle part (Khooriat or creeps). For the long lived naturally occurring radionuclide (40)K and Gulf war (238)U (anti armor shells), there were no significant

  4. Assessment of the sensitivity of the southern coast of the Gulf of Corinth (Peloponnese, Greece) to sea-level rise

    NASA Astrophysics Data System (ADS)

    Karymbalis, Efthimios; Chalkias, Christos; Chalkias, George; Grigoropoulou, Eleni; Manthos, George; Ferentinou, Maria

    2012-12-01

    The eustatic sea-level rise due to global warming is predicted to reach approximately 18-59 cm by the year 2100, which necessitates the identification and protection of sensitive sections of coastline. In this study, the classification of the southern coast of the Gulf of Corinth according to the sensitivity to the anticipated future sealevel rise is attempted by applying the Coastal Sensitivity Index (CSI), with variable ranges specifically modified for the coastal environment of Greece, utilizing GIS technology. The studied coastline has a length of 148 km and is oriented along the WNW-ESE direction. CSI calculation involves the relation of the following physical variables, associated with the sensitivity to long-term sea-level rise, in a quantifiable manner: geomorphology, coastal slope, relative sea-level rise rate, shoreline erosion or accretion rate, mean tidal range and mean wave height. For each variable, a relative risk value is assigned according to the potential magnitude of its contribution to physical changes on the coast as the sea-level rises. Every section of the coastline is assigned a risk ranking based on each variable, and the CSI is calculated as the square root of the product of the ranked variables divided by the total number of variables. Subsequently, a CSI map is produced for the studied coastline. This map showed that an extensive length of the coast (57.0 km, corresponding to 38.7% of the entire coastline) is characterized as highly and very highly sensitive primarily due to the low topography, the presence of erosionsusceptible geological formations and landforms and fast relative sea-level rise rates. Areas of high and very high CSI values host socio-economically important land uses and activities.

  5. Gulf Stream's induced sea level rise and variability along the U.S. mid-Atlantic coast

    NASA Astrophysics Data System (ADS)

    Ezer, Tal; Atkinson, Larry P.; Corlett, William B.; Blanco, Jose L.

    2013-02-01

    Recent studies indicate that the rates of sea level rise (SLR) along the U.S. mid-Atlantic coast have accelerated in recent decades, possibly due to a slowdown of the Atlantic Meridional Overturning Circulation (AMOC) and its upper branch, the Gulf Stream (GS). We analyzed the GS elevation gradient obtained from altimeter data, the Florida Current transport obtained from cable measurements, the North Atlantic Oscillation (NAO) index, and coastal sea level obtained from 10 tide gauge stations in the Chesapeake Bay and the mid-Atlantic coast. An Empirical Mode Decomposition/Hilbert-Huang Transformation (EMD/HHT) method was used to separate long-term trends from oscillating modes. The coastal sea level variations were found to be strongly influenced by variations in the GS on timescales ranging from a few months to decades. It appears that the GS has shifted from a 6-8 year oscillation cycle to a continuous weakening trend since about 2004 and that this trend may be responsible for recent acceleration in local SLR. The correlation between long-term changes in the coastal sea level and changes in the GS strength was extremely high (R = -0.85 with more than 99.99% confidence that the correlation is not zero). The impact of the GS on SLR rates over the past decade seems to be larger in the southern portion of the mid-Atlantic Bight near Cape Hatteras and is reduced northward along the coast. The study suggests that regional coastal sea level rise projections due to climate change must take into account the impact of spatial changes in ocean dynamics.

  6. EFFECTS OF HURRICANE KATRINA ON BENTHIC MACROINVERTEBRATE COMMUNITIES ALONG THE NORTHERN GULF OF MEXICO COAST

    EPA Science Inventory

    A study was initiated in fall 2005 to assess potential effects on benthic fauna and habitat quality in coastal waters of Louisiana, Mississippi, and Alabama following Hurricane Katrina, which struck the coast of Louisiana, between New Orleans and Bioloxi, Mississippi on August 29...

  7. Governance and the Gulf of Mexico coast: How are current policies contributing to sustainability?

    EPA Science Inventory

    The quality of life and economies of coastal communities depend to a great degree on the ecological integrity of coastal ecosystems. Paradoxically, as more people are drawn to the coasts, these ecosystems and the services they provide are increasingly stressed by development and ...

  8. EFFECTS OF HURRICANE KATRINA ON BENTHIC MACROINVERTEBRATE COMMUNITIES ALONG THE NORTHERN GULF OF MEXICO COAST

    EPA Science Inventory

    A study was initiated in fall 2005 to assess potential effects on benthic fauna and habitat quality in coastal waters of Louisiana, Mississippi, and Alabama following Hurricane Katrina, which struck the coast of Louisiana, between New Orleans and Bioloxi, Mississippi on August 29...

  9. Governance and the Gulf of Mexico coast: How are current policies contributing to sustainability?

    EPA Science Inventory

    The quality of life and economies of coastal communities depend to a great degree on the ecological integrity of coastal ecosystems. Paradoxically, as more people are drawn to the coasts, these ecosystems and the services they provide are increasingly stressed by development and ...

  10. Phylogenetic composition and distribution of picoeukaryotes in the hypoxic northwestern coast of the Gulf of Mexico

    PubMed Central

    Rocke, Emma; Jing, Hongmei; Liu, Hongbin

    2013-01-01

    Coastal marine hypoxic, or low-oxygen, episodes are an increasing worldwide phenomenon, but its effect on the microbial community is virtually unknown by far. In this study, the community structure and phylogeny of picoeukaryotes in the Gulf of Mexico, which are exposed to severe hypoxia in these areas was explored through a clone library approach. Both oxic surface waters and suboxic bottom waters were collected in August 2010 from three representative stations on the inner Louisiana shelf near the Atchafalaya and Mississippi River plumes. The bottom waters of the two more western stations were much more hypoxic in comparison to those of the station closest to the Mississippi River plume, which were only moderately hypoxic. A phylogenetic analysis of a total 175 sequences, generated from six 18S rDNA clone libraries, demonstrated a clear dominance of parasitic dinoflagellates from Marine alveolate clades I and II in all hypoxic waters as well as in the surface layer at the more western station closest to the Atchafalaya River plume. Species diversity was significantly higher at the most hypoxic sites, and many novel species were present among the dinoflagellate and stramenopile clades. We concluded that hypoxia in the Gulf of Mexico causes a significant shift in picoeukaryote communities, and that hypoxia may cause a shift in microbial food webs from grazing to parasitism. PMID:23281331

  11. Advanced Regional and Decadal Predictions of Coastal Inundation for the U.S. Atlantic and Gulf Coasts

    NASA Astrophysics Data System (ADS)

    Horton, B. P.; Donnelly, J. P.; Corbett, D. R.; Kemp, A.; Lindeman, K.; Mann, M. E.; Peltier, W. R.; Rahmstorf, S.

    2012-12-01

    Future inundation of the US Atlantic and Gulf coasts will depend upon both sea-level rise and the intensity and frequency of tropical cyclones, each of which will be affected by climate change. In this proposal, we will employ new interdisciplinary approaches to bring about a step change in the reliability of predictions of such inundation. The rate of sea-level rise along the US Atlantic and Gulf coasts has increased throughout the 20th century. Whilst there is widespread agreement that it continue to accelerate during the 21st century, great uncertainty surrounds its magnitude and geographic distribution. Key uncertainties include the role of continental ice sheets, mountain glaciers and ocean density changes. Insufficient understanding of these complex physical processes precludes accurate prediction of sea-level rise. New approaches using semi-empirical models that relate instrumental records of climate and sea-level rise have projected up to 2 m of sea-level rise by AD 2100. But the time span of instrumental sea-level records is insufficient to adequately constrain the climate:sea-level relationship. Here, we produce new high resolution proxy data of sea-level and temperature to provide crucial additional constraints to such semi-empirical models. Our dataset will span the alternation between the "Medieval Climate Anomaly" and "Little Ice Age". Before the models can provide appropriate data for coastal management and planning, they must be complemented with regional estimates of sea-level rise. Therefore, the proxy sea-level data has been collected from six study areas (Massachusetts, New Jersey, North Carolina, Georgia and Atlantic and Gulf coasts of Florida) to accommodate the required extent of regional variability. In the case of inundation arising from tropical cyclones, the historical and observational records are insufficient for predicting their nature and recurrence, because they are such extreme and rare events. Moreover, in the future, the resultant

  12. Faunistic analysis of the caridean shrimps inhabiting seagrasses along the NW coast of the Gulf of Mexico and Caribbean Sea.

    PubMed

    Macías, Everardo Barba

    2012-09-01

    Seagrass meadows are highly productive and ecologically important habitats in estuaries and coastal lagoons, and contain a variety of faunal communities, from which the caridean shrimps are a dominant component. The purpose of this work was to analyze the environmental parameters of water and sediments, with the biological components in seagrass epifaunal communities, from the Western Gulf of Mexico and the Caribbean Sea. For this, density and diversity of caridean shrimps were analyzed and correlated with environmental parameters and seagrass biomass, and zoogeographic affinities were determined. The spatial distribution of caridean shrimps was recorded for 12 localities with Halodule wrightii and Thalassia testudinum monospecific seagrass meadows. A total of 72158 individuals of 16 taxa were collected. Among results, the Hippolytidae resulted the most abundant group (92.3%) with eight species, and was followed by Palaemonidae with 7.6% of the abundance and seven species, and the Alpheidae with only one genus. From the total of collected carideans, a 37.3% was found in H. wrightii and 62.7% in T. testudinum. The dominant species were Hippolyte zostericola (12.39ind./m2), Tozeuma carolinense (9.5ind./m2), Thor dobkini (4.84ind./m2) and Palaemonetes vulgaris (4.87ind./m2). The zoogeographic distribution of the carideans presented two groups: species of the Virginian-Carolinean province representing its Southern limit (43.75%) and species of the Brazilian-Caribbean province representing its Northern limit (56.25%). The species H. zostericola, T. carolinense, P. vulgaris, P. pugio and P. intermedius are widely distributed along the Western Atlantic coast. This study has base line information for seagrass habitats, the community of epifaunal carideans and their ecological affinities, previous to the oil spill in the Gulf of Mexico.

  13. Four States, Four Projects, One Mission: Collectively Enhancing Mental and Behavioral Health Capacity Throughout the Gulf Coast.

    PubMed

    Langhinrichsen-Rohling, Jennifer; Osofsky, Howard; Osofsky, Joy; Rohrer, Glenn; Rehner, Timothy

    The 2010 Deepwater Horizon oil spill triggered numerous concerns regarding the health and well-being of citizens within the already vulnerable Gulf Coast region. Four Mental and Behavioral Health Capacity Projects (MBHCPs) united to form the Quad-State MBHCP component of the Gulf Region Health Outreach Program (GRHOP). Their shared mission was to increase mental and behavioral health (MBH) capacity within coastal counties of Louisiana, Mississippi, Alabama, and the Florida Panhandle. To describe strategies used to collectively enhance the impact of the 4 state-specific MBHCPs and to share lessons learned from a multistate collaborative flexibly designed to meet a shared mission. Archival materials were assessed. They included attendance sheets/notes from regularly scheduled group meetings, GRHOP quarterly and annual reports, and state-specific MBHCP logic models. Nationally available data on MBH services provided in project-relevant primary care sites were also examined. Three strategies were found to be effective facilitators of collective success: (i) reciprocal participation in the backbone organization (GRHOP); (ii) creation and comparison of state-specific MBHCP logic models and activities; and (iii) cross-fertilization among the MBHCP state-specific logic models, a unified Quad-State, and the GRHOP-wide logic model to generate additional synergistic endeavors and measureable outcomes. Examples of region-wide MBHCP success, such as uptake in integrated health services in health care clinics across the jurisdiction of investment, are presented. Isolated approaches to complex issues are, at times, ineffective. The Collective Impact (CI) model, with an emphasis on coordination among existing organizations, stakeholders, and the public, can serve as a guidepost to facilitate sustainable change even when used in a modified form. Strategies discussed herein for maximizing the 5 prescribed CI conditions provide an important roadmap for how to interface among

  14. Seismic Images of the Gulf Stream Front off the Coast of North Carolina from the 2014 ENAM Community Seismic Experiment

    NASA Astrophysics Data System (ADS)

    Blacic, T. M.

    2014-12-01

    The Eastern North America Margin (ENAM) Community Seismic Experiment (CSE) is scheduled to collect on- and offshore active source seismic data including more than 2500 km of multichannel seismic (MCS) reflection profiles in the fall of 2014. The project was designed to address a wide array of questions related to the evolution and modification of the eastern North American rifted margin in conjunction with the arrival of the Earthscope transportable array on the US East Coast. The planned rifting-parallel profiles north and south of Cape Hatteras are expected to cross the front between the warm water of the Gulf Stream western boundary current and colder North Atlantic water providing the opportunity to image mesoscale features related to the front and their associated fine structure. Standard MCS data has been shown to be well-tuned to image ocean fine structure resulting from abrupt vertical changes in temperature and salinity in the ocean. Thus, the same seismic data that is collected to investigate the sub-seafloor geology can also be processed to image reflections in the water that reveal ocean processes with a horizontal resolution of ~10 m and vertical resolution of ~4 m. As an add-on to the ENAM CSE, 30 additional expendable bathythermographs and 3 conductivity temperature depth probes belonging to the University of Wyoming are planned for deployment during the collection of the MCS profiles resulting in an average hydrographic profile spacing of ~33 km. We present a first look at this new seismic oceanography data set providing 2-D images of ocean acoustic reflectivity correlated with closely spaced hydrographic measurements across the Gulf Stream front.

  15. Organchlorine content and shell thickness in brown booby (Sula leucogaster) eggs in the Gulf of California and the southern Pacific coast of Mexico.

    PubMed

    Mellink, Eric; Riojas-López, Mónica E; Luévano-Esparza, Jaime

    2009-07-01

    We determined egg concentrations of organochlorines and thickness of eggshells from brown boobies at eight colonies ranging from the northern Gulf of California to southern Mexico. The only common residue was that of DDE, which was found in almost all eggs. DDE content apparently reflected pre-1990 DDT use in nearby agricultural areas and, at one site, intensive mosquito control for high-end tourism development. There were no inter-colony differences in eggshell thickness, and variation in this variable likely reflected individual bird characteristics and/or individual feeding source. This variable was not a good proxy to DDE exposure of brown boobies, under current DDE levels in the brown booby trophic chain. In the northern Gulf of California, eggshell thickness has recovered to pre-DDT conditions. Our data indicate that the Gulf of California and southwestern coast of Mexico have a healthy near-shore marine environment, as far as organochlorines are concerned.

  16. Summary of LOGDEX data base

    SciTech Connect

    Hill, T.; Sepehrnoori, K.

    1981-08-01

    A summary of LOGDEX, the digitized well log data base maintained by the Center for Energy Studies at The University of Texas at Austin is presented. These well logs were obtained from various oil companies and then converted from paper well logs to numeric information on magnetic computer tapes for input into the well log data base. This data base serves as a resource for application programs in the study of geopressured geothermal energy resources, for well logging research, and for geological research. Currently the location and scope of well log data that may be found within the LOGDEX data base are limited to wells along the Texas-Louisiana Gulf Coast that are known to have a potential as a geopressured geothermal energy resource. Additionally the location of these wells in that area is highly localized into areas that have been defined by Department of Energy researchers as having a high potential for geopressured geothermal energy. The LOGDEX data base currently contains data from more than 350 wells, representing more than 1600 logs and 16,600,000 curve feet of data. For quick reference to a given log, the summary listing has been indexed into seven divisions: well classification, location by county or parish, curve type, log type, operators, location by state, and well names. These indexes are arranged alphabetically and cross-referenced by page number.

  17. Advanced Regional and Decadal Predictions of Coastal Inundation for the U.S. Atlantic and Gulf Coasts (Invited)

    NASA Astrophysics Data System (ADS)

    Horton, B.; Corbett, D. R.; Donnelly, J. P.; Kemp, A.; Lin, N.; Lindeman, K.; Mann, M. E.; Peltier, W. R.; Rahmstorf, S.

    2013-12-01

    Future inundation of the U.S. Atlantic and Gulf coasts will depend upon sea-level rise and the intensity and frequency of tropical cyclones, each of which will be affected by climate change. Through ongoing, collaborative research we are employing new interdisciplinary approaches to bring about a step change in the reliability of predictions of such inundation. The rate of sea level rise along the U.S. Atlantic and Gulf coasts increased throughout the 20th century. Whilst there is widespread agreement that it continue to accelerate during the 21st century, great uncertainty surrounds its magnitude and geographic variability. Key uncertainties include the role of continental ice sheets, mountain glaciers, and ocean density changes. Insufficient understanding of these complex physical processes precludes accurate prediction of sea-level rise. New approaches using semi-empirical models that relate instrumental records of climate and sea-level rise have projected up to 2 m of sea-level rise by AD 2100. But the time span of instrumental sea-level records is insufficient to adequately constrain the climate:sea-level relationship. We produced new, high-resolution proxy sea-level reconstructions to provide crucial additional constraints to such semi-empirical models. Our dataset spans the alternation between the 'Medieval Climate Anomaly' and 'Little Ice Age'. Before the models can provide appropriate data for coastal management and planning, they must be complemented with regional estimates of sea-level rise. Therefore, the proxy sea-level data has been collected from four study areas (Connecticut, New Jersey, North Carolina and Florida) to accommodate the required extent of regional variability. In the case of inundation arising from tropical cyclones, the historical and observational records are insufficient for predicting their nature and recurrence, because they are such extreme and rare events. Moreover, future storm surges will be superimposed on background sea

  18. Fan sedimentation on continental margins: A comparison of Miocene Gulf Coast systems with the Middle Eocene Cozy Dell Formation of southern California

    SciTech Connect

    Riese, W.C.R. ); Clark, M.S. )

    1990-05-01

    Recent seismic and subsurface stratigraphic studies of the Miocene System, offshore Texas resulted in the development of a depositional model that documents and explains the deposition of sand-prone fans on the outer shelf during times when these areas were still covered by several hundred feet of water. This model suggests that sediment transport was by turbid flow and that sedimentation resulted in the development of leveed channel systems. The geometries and scales of these fan systems have been documented by three-dimensional seismic analysis and field-wide well penetrations in the Matagorda 668 field. It further advances the hypothesis that global eustatic levels were generally higher and basin water budgets greater during the Miocene than during later times in at least the Gulf Coast area. Translation of this model to outcrop areas is hampered in the Gulf Coast, and detail verification and refinement of the model has been restricted to subsurface work alone. This has also hampered the authors attempt to carry this model to non-Miocene-age systems. Work on the middle Eocene Cozy Dell Formation exposures in the Topatopa and Santa Ynez Mountains of southern California has revealed that this formation has a depositional history which may not be different than that interpreted for the Gulf Coast Miocene. This formation was deposited by turbidity currents in what has been interpreted to be an upper slope setting. The fans deposited by these currents have well-developed channel-levee complexes and display scales of geometry similar to those seen in the Gulf Coast Miocene. This formation displays seismic-sequence scale stratal geometries that suggest that it was deposited during lowstands of sea level.

  19. A review of the biology and literature of the Gulf Coast Toad (Incilius nebulifer), native to Mexico and the United States.

    PubMed

    Mendelson, Joseph R Iii; Kinsey, Chase T; Murphy, James B

    2015-06-24

    The Gulf Coast Toad (Incilius nebulifer) is an abundant and widespread species within its range in the United States and Mexico, so it appears on many faunal checklists and is considered in diverse kinds of research. We review the basic biology, distribution, and published history of this species, identifying only those records and publications referable to I. nebulifer, to help researchers identify published works pertaining to I. nebulfer rather than I. valliceps, with which it formerly was considered to be conspecific.

  20. Oil and gas developments in Louisiana Gulf Coast offshore in 1983

    SciTech Connect

    Weiss, E.A.; Voorhees, D.H.

    1984-10-01

    In 1983, offshore Louisiana had 1008 wells drilled, a decrease of 25 wells from 1982. The overall success rate decreased 2.6% to (62.5%) from 1982. The success rate for wildcats decreased to 21.2%, with 38 new-field discoveries. The success rate for new-pool and outpost drilling decreased to 47.1%, with 32 discoveries. At Federal Lease Sale 72 on May 25, 1983, the first area-wide federal lease sale in the Gulf of Mexico, a record $4.58 billion was bid on 656 leases by 80 companies. The total of accepted winning bids on 623 tracts (3,089,872 acres) was $3.37 billion. Geophysical activity decreased to 1220 crew-weeks, down 13% from 1982.

  1. Survey of the U.S. Gulf Coast for the Presence of Clostridium botulinum

    PubMed Central

    Ward, B. Q.; Carroll, B. J.; Garrett, E. S.; Reese, G. B.

    1967-01-01

    In sediments and animals collected during warm weather months between Key West, Fla., and Brownsville, Tex., Clostridium botulinum, predominantly type E, was demonstrable. Incidence was somewhat higher in the eastern Gulf animals, but the organism was present to the southernmost limits of both Texas and Florida. Types A and F were never detected in warm weather. No bottom type or any single species seemed exclusively vulnerable. In samples collected during colder weather, the east-west incidence differential was minimized in animals but not in sediments, overall incidence was lowered, all known types were present, and type E no longer predominated. Detection by fluorescent-antibody techniques was found to be inadequate. Images Fig. 2 Fig. 4 PMID:5340653

  2. Phylogenetic composition and distribution of picoeukaryotes in the hypoxic northwestern coast of the Gulf of Mexico.

    PubMed

    Rocke, Emma; Jing, Hongmei; Liu, Hongbin

    2013-02-01

    Coastal marine hypoxic, or low-oxygen, episodes are an increasing worldwide phenomenon, but its effect on the microbial community is virtually unknown by far. In this study, the community structure and phylogeny of picoeukaryotes in the Gulf of Mexico, which are exposed to severe hypoxia in these areas was explored through a clone library approach. Both oxic surface waters and suboxic bottom waters were collected in August 2010 from three representative stations on the inner Louisiana shelf near the Atchafalaya and Mississippi River plumes. The bottom waters of the two more western stations were much more hypoxic in comparison to those of the station closest to the Mississippi River plume, which were only moderately hypoxic. A phylogenetic analysis of a total 175 sequences, generated from six 18S rDNA clone libraries, demonstrated a clear dominance of parasitic dinoflagellates from Marine alveolate clades I and II in all hypoxic waters as well as in the surface layer at the more western station closest to the Atchafalaya River plume. Species diversity was significantly higher at the most hypoxic sites, and many novel species were present among the dinoflagellate and stramenopile clades. We concluded that hypoxia in the Gulf of Mexico causes a significant shift in picoeukaryote communities, and that hypoxia may cause a shift in microbial food webs from grazing to parasitism. © 2012 The Authors. Published by Blackwell Publishing Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

  3. An evaluation of introgression of Atlantic coast striped bass mitochondrial DNA in a Gulf of Mexico population using formalin-preserved museum collections.

    PubMed

    Wirgin, I; Maceda, L; Stabile, J; Mesing, C

    1997-10-01

    Striped bass Morone saxatilis populations in drainages along the Gulf of Mexico coast (Gulf) were depleted in the 1950s and 1960s, probably because of anthropogenic influences. It is believed that only the Apalachicola-Chattahoochee-Flint (A-C-F) river system continually supported a naturally reproducing population of Gulf lineage. Striped bass juveniles of Atlantic coast (Atlantic) ancestry were introduced to restore population abundances in the A-C-F from the late 1960s to the mid 1970s and in many other Gulf rivers from the 1960s to the present. We previously identified mtDNA polymorphisms that were unique to approximately 60% of striped bass from the A-C-F and which confirmed the continued successful natural reproduction of striped bass of Gulf maternal ancestry within the system. However, the genetic relatedness of the extant A-C-F population to 'pure' Gulf striped bass was not addressed. In this study, we determined the frequency of a diagnostic mtDNA XbaI polymorphism in samples of 'pure' Gulf striped bass that were collected from the A-C-F prior to the introduction of Atlantic fish, that were obtained from museum collections, and that were originally preserved in formalin. PCR primers were developed that allowed for amplification of a 191-bp mtDNA fragment that contained the diagnostic XbaI restriction site. Using RFLP and direct sequence analyses of the PCR amplicons, we found no significant differences in mtDNA XbaI genotype frequencies between the archived samples and extant A-C-F samples collected over a 15-year period. This indicates that significant maternally mediated introgression of Atlantic mtDNA genomes into the A-C-F gene pool has not occurred. Additionally, we found no evidence of the unique Gulf mtDNA genotype in striped bass from extant populations in Texas, Louisiana and the Mississippi River. These results highlight the importance of the A-C-F as a repository of striped bass to restore extirpated Gulf populations and the potential use of

  4. Isolation of Rickettsia parkeri and identification of a novel spotted fever group Rickettsia sp. from Gulf Coast ticks (Amblyomma maculatum) in the United States.

    PubMed

    Paddock, Christopher D; Fournier, Pierre-Edouard; Sumner, John W; Goddard, Jerome; Elshenawy, Yasmin; Metcalfe, Maureen G; Loftis, Amanda D; Varela-Stokes, Andrea

    2010-05-01

    Until recently, Amblyomma maculatum (the Gulf Coast tick) had garnered little attention compared to other species of human-biting ticks in the United States. A. maculatum is now recognized as the principal vector of Rickettsia parkeri, a pathogenic spotted fever group rickettsia (SFGR) that causes an eschar-associated illness in humans that resembles Rocky Mountain spotted fever. A novel SFGR, distinct from other recognized Rickettsia spp., has also been detected recently in A. maculatum specimens collected in several regions of the southeastern United States. In this study, 198 questing adult Gulf Coast ticks were collected at 4 locations in Florida and Mississippi; 28% of these ticks were infected with R. parkeri, and 2% of these were infected with a novel SFGR. Seventeen isolates of R. parkeri from individual specimens of A. maculatum were cultivated in Vero E6 cells; however, all attempts to isolate the novel SFGR were unsuccessful. Partial genetic characterization of the novel SFGR revealed identity with several recently described, incompletely characterized, and noncultivated SFGR, including "Candidatus Rickettsia andeanae" and Rickettsia sp. Argentina detected in several species of Neotropical ticks from Argentina and Peru. These findings suggest that each of these "novel" rickettsiae represent the same species. This study considerably expanded the number of low-passage, A. maculatum-derived isolates of R. parkeri and characterized a second, sympatric Rickettsia sp. found in Gulf Coast ticks.

  5. Targeted technology applications for infield reserve growth: A synopsis of the Secondary Natural Gas Recovery project, Gulf Coast Basin. Topical report, September 1988--April 1993

    SciTech Connect

    Levey, R.A.; Finley, R.J.; Hardage, B.A.

    1994-06-01

    The Secondary Natural Gas Recovery (SGR): Targeted Technology Applications for Infield Reserve Growth is a joint venture research project sponsored by the Gas Research Institute (GRI), the US Department of Energy (DOE), the State of Texas through the Bureau of Economic Geology at The University of Texas at Austin, with the cofunding and cooperation of the natural gas industry. The SGR project is a field-based program using an integrated multidisciplinary approach that integrates geology, geophysics, engineering, and petrophysics. A major objective of this research project is to develop, test, and verify those technologies and methodologies that have near- to mid-term potential for maximizing recovery of gas from conventional reservoirs in known fields. Natural gas reservoirs in the Gulf Coast Basin are targeted as data-rich, field-based models for evaluating infield development. The SGR research program focuses on sandstone-dominated reservoirs in fluvial-deltaic plays within the onshore Gulf Coast Basin of Texas. The primary project research objectives are: To establish how depositional and diagenetic heterogeneities cause, even in reservoirs of conventional permeability, reservoir compartmentalization and hence incomplete recovery of natural gas. To document examples of reserve growth occurrence and potential from fluvial and deltaic sandstones of the Texas Gulf Coast Basin as a natural laboratory for developing concepts and testing applications. To demonstrate how the integration of geology, reservoir engineering, geophysics, and well log analysis/petrophysics leads to strategic recompletion and well placement opportunities for reserve growth in mature fields.

  6. Simulation of ocean acidification variability along the East and Gulf coasts of the US for 1979 - 2015 using MOM5-TOPAZ

    NASA Astrophysics Data System (ADS)

    Liu, Y.; Lee, S. K.; Wanninkhof, R. H.; Barbero, L.; Van Hooidonk, R. J.

    2016-12-01

    Analysis of the data collected during the first (2007) and the second (2012) Gulf of Mexico and East Coast Carbon (GOMECC) cruises showed measurable temporal pH and aragonite saturation state (Ωar) changes along the eight major transects. However, it is challenging to determine how much of this temporal change between the two cruises was due to ocean acidification and how much is due to variability on seasonal to interannual scales. Therefore, to further explore the variability of ocean acidification processes along the East and Gulf coasts of the U.S., here we use a high-resolution ( 8 km) regional ocean model coupled to a biogeochemistry module (GFDL's Modular Ocean Model version 5 with TOPAZ biogeochemistry, MOM5-TOPAZ) and forced with the ERA-Interim surface fluxes. The model domain contains the western North Atlantic Ocean (100oW - 60oW, 10oN - 45oN). The high-resolution regional MOM5-TOPAZ is initialized from World Ocean Atlas 2013 and integrated for the period of 1979 - 2015 by using open boundary conditions derived from the global MOM5-TOPAZ. The carbon and biogeochemical processes along the East and Gulf coasts of the U.S. are assessed and discussed.

  7. Monitoring storm tide and flooding from Hurricane Isaac along the Gulf Coast of the United States, August 2012

    USGS Publications Warehouse

    McCallum, Brian E.; McGee, Benton D.; Kimbrow, Dustin R.; Runner, Michael S.; Painter, Jaime A.; Frantz, Eric R.; Gotvald, Anthony J.

    2012-01-01

    The U.S. Geological Survey (USGS) deployed a temporary monitoring network of water-level and barometric pressure sensors at 127 locations along the gulf coast from Alabama to Louisiana to record the timing, areal extent, and magnitude of hurricane storm tide and coastal flooding generated by Hurricane Isaac. This deployment was undertaken as part of a coordinated federal emergency response as outlined by the Stafford Act under a directed mission assignment by the Federal Emergency Management Agency. Storm tide, as defined by National Oceanic and Atmospheric Administration (NOAA; National Oceanic and Atmospheric Administration, 2008), is the water-level rise generated by a combination of storm surge and astronomical tide during a coastal storm. Hurricane Isaac initially made landfall on the coast of Louisiana in Plaquemines Parish on August 28, 2012, as a Category 1 hurricane on the Saffir–Simpson Hurricane Wind Scale (National Weather Service, 1974) and then stalled over southern Louisiana for several days, causing prolonged storm-tide impacts. A total of 188 water-level and wave-height sensors were deployed at 127 locations during August 27–28 prior to landfall. More than 90 percent of the sensors and all high-water marks (HWMs) were recovered and surveyed to North American Vertical Datum of 1988 (NAVD 88) within 7 days of the Isaac landfall. Only a handful of sensors in the Plaquemines Parish area of Louisiana could not be retrieved until weeks later due to prolonged flooding in the area. Data collected from this event can be used to evaluate the performance of storm-tide models for maximum and incremental water level and flood extent and the site-specific effects of storm tide on natural and anthropogenic features of the environment.

  8. Community Assessment for Public Health Emergency Response (CASPER) one year following the Gulf Coast oil spill: Alabama and Mississippi, 2011.

    PubMed

    Buttke, Danielle; Vagi, Sara; Schnall, Amy; Bayleyegn, Tesfaye; Morrison, Melissa; Allen, Mardi; Wolkin, Amy

    2012-12-01

    On April 20, 2010, the Deepwater Horizon drilling unit exploded off the coast of Louisiana, resulting in 11 deaths and the largest marine petroleum release in history. Previous oil spill disasters have been associated with negative mental health outcomes in affected communities. In response to requests from Mississippi and Alabama, potential mental health issues resulting from this event were identified by implementing a novel use of a Community Assessment for Public Health Emergency Response (CASPER) in the months immediately following the Gulf Coast oil spill. This assessment was repeated one year later to determine long-term mental health needs and changes. A two-stage sampling method was used to select households, and a questionnaire including the Centers for Disease Control and Prevention's Behavioral Risk Factor Surveillance System (BRFSS) questions was administered. Weighted cluster analysis was conducted, and BRFSS questions were compared to the most recent BRFSS reports and the 2010 results. In 2011, 8.8%-15.1% of individuals reported depressive symptoms compared to 15.4%-24.5% of individuals in 2010, with 13.2%-20.3% reporting symptoms consistent with an anxiety disorder compared to 21.4%-31.5% of individuals in 2010. Respondents reporting decreased income following the oil spill were more likely to report mental health symptoms compared to respondents reporting no change in income. Overall, mental health symptoms were higher in the three assessment areas compared to BRFSS reports, but lower than 2010 surveys. These results suggest that mental health services are still needed, particularly in households experiencing decreased income since the oil spill.

  9. The persistence of endangered Florida Salt Marsh Voles in salt marshes of the central Florida Gulf Coast

    USGS Publications Warehouse

    Hotaling, A.S.; Percival, H.F.; Kitchens, W.M.; Kasbohm, J.W.

    2010-01-01

    Two endangered Microtus pennsylvanicus dukecampbelli (Florida Salt Marsh Vole) were captured at a new location, in February of 2009, at Lower Suwannee National Wildlife Refuge. Since the species discovery in 1979, only 43 Florida Salt Marsh Voles (hereafter FSM Vole) have been captured. Outside of the type locality, this is only the second documented location for the FSM Vole. Given the difficulty in trapping this species and the lack of information about its life history, its discovery in a new location lends itself to the possibility that it is more widespread in the Central Florida Gulf Coast than previously thought. Although much of the salt marsh in the area is in public ownership, a good deal of it has already been altered by logging or development and is threatened by global climate change. More research is needed to adequately protect and manage the habitat for the FSM Vole. A study of FSM Vole coastal salt marsh habitat could also serve as a valuable monitoring tool for subtle changes in salt marsh habitats as global climate change progresses.

  10. Final report on decommissioning of wells, boreholes, and tiltmeter sites, Gulf Coast Interior Salt Domes of Louisiana

    SciTech Connect

    Not Available

    1989-07-01

    In the late 1970s, test holes were drilled in northern Louisiana in the vicinity of Vacherie and Rayburn`s Salt Domes as part of the Department of Energy`s (DOE) National Waste Terminal Storage (NWTS) (rename the Civilian Radioactive Waste Management (CRWM)) program. The purpose of the program was to evaluate the suitability of salt domes for long term storage or disposal of high-level nuclear waste. The Institute for Environmental Studies at Louisiana State University (IES/LSU) and Law Engineering Testing Company (LETCo) of Marietta, Georgia performed the initial field studies. In 1982, DOE awarded a contract to the Earth Technology Corporation (TETC) of Long Beach, California to continue the Gulf Coast Salt Dome studies. In 1986, DOE deferred salt domes from further consideration as repository sites. This report describes test well plugging and site abandonment activities performed by SWEC in accordance with Activity Plan (AP) 1--3, Well Plugging and Site Restoration of Work Sites in Louisiana. The objective of the work outlined in this AP was to return test sites to as near original condition as possible by plugging boreholes, removing equipment, regrading, and seeding. Appendices to this report contain forms required by State of Louisiana, used by SWEC to document decommissioning activities, and pertinent documentation related to lease/access agreements.

  11. The occurrence and behavior of radium in saline formation water of the U.S. Gulf Coast region

    USGS Publications Warehouse

    Kraemer, T.F.; Reid, D.F.

    1984-01-01

    Radium has been measured in deep saline formation waters produced from a variety of U.S. Gulf Coast subsurface environments, including oil reservoirs, gas reservoirs and water-producing geopressured aquifers. A strong positive correlation has been found between formation-water salinity and Ra activity, resulting from the interaction of formation water with aquifer matrix. Ra isotopes enter the fluid phase after being produced by the decay of parent elements U and Th, which are located at sites on and within the solid matrix. Processes that are belived to be primarily responsible for transferring Ra from matrix to formation water are chemical leaching and alpha-particle recoil. Factors controlling the observed salinity-Ra relationship may be one or a combination of the following factors: (a) ion exchange; (b) increased solubility of matrix silica surrounding Ra atoms, coupled with a salinity-controlled rate of reequilibration of silica between solution and quartz grains; and (c) the equilibration of Ra in solution with detrial barite within the aquifer. No difference was found in the brine-Ra relation in water produced from oil or gas wells and water produced from wells penetrating only water-bearing aquifers, although the relation was more highly correlated for water-bearing aquifers than hydrocarbon-containing reservoirs. ?? 1984.

  12. The occurrence and behavior of radium in saline formation water of the U.S. Gulf Coast region.

    USGS Publications Warehouse

    Kraemer, T.F.; Reid, D.F.

    1984-01-01

    Ra was measured in deep saline formation waters produced from a variety of US Gulf Coast subsurface environments, including oil and gas reservoirs, and water-producing geopressured aquifers. A strong positive correlation was found between formation-water salinity and Ra activity, resulting from the interaction of formation water with aquifer matrix. Ra isotopes enter the fluid phase after being produced by the decay of parent elements U and Th on and within the solid matrix. The processes believed to be primarily responsible for transfering Ra from matrix to formation water are chemical leaching and alpha -particle recoil. Factors controlling the observed salinity-Ra relationship may be one or a combination of the following: 1) ion exchange; 2) increased solubility of matrix silica surrounding Ra atoms, coupled with a salinity-controlled rate of re-equilibration of silica between solution and quartz grains; and 3) the equilibration of Ra in solution with detrital baryte within the aquifer. No difference was found in the brine-Ra relation in water produced from oil or gas wells and water produced from wells penetrating only water-bearing aquifers, although the relation was more highly correlated for water-bearing aquifers than hydrocarbon-containing reservoirs.-P.Br.

  13. Epidemiological observations and heterosis analysis of gastrointestinal nematode parasitism in Suffolk, Gulf Coast Native, and crossbred lambs.

    PubMed

    Li, Y; Miller, J E; Franke, D E

    2001-07-27

    A crossbreeding program was conducted to evaluate the resistant status to gastrointestinal nematode parasite infection in crossbred (F1) lambs and their Suffolk and Gulf Coast Native (Native) breed counterparts. A total of 253 lambs were included in the study over 2 years. Fecal egg count (FEC) and blood packed cell volume (PCV) of 18-20 monitor lambs of each breed group in each year were collected every other week from birth to 24-30 weeks of age. The FEC and PCV of all lambs were determined at weaning (11-12 weeks of age) and at three subsequent times when anthelmintic treatment was administered. Nematode counts of wether lambs were obtained at 30 weeks of age in the first year. The epidemiological patterns of FEC and PCV of each breed group were similar in both years. The Suffolk group consistently showed the highest FEC and the lowest PCV. Conversely, the Native group had the lowest FEC and highest PCV. For the most part, all parameters for the F1 group fell intermediate to the Native and Suffolk groups. Nematode count followed the same pattern. Heterosis analysis showed that FEC, PCV, nematode count and weight gain of the F1 group favored the Native group. These results suggested that crossbreeding Suffolk to Native sheep may be a suitable way to produce lambs with improved resistance to gastrointestinal nematode infection, but production may be compromised.

  14. Relative sea-level rise as indicated by gage data along the Mississippi and Alabama Gulf Coasts

    USGS Publications Warehouse

    Van Wilson, Jr.

    2004-01-01

    Global warming, or the increasing of earth's temperatures, leads to rising sea level as polar ice caps and mountain glaciers melt and ocean water undergoes thermal expansion. Tidal records collected by the U.S. Army Corps of Engineers (COE), Mobile District, at Gulfport, Biloxi, and Pascagoula, Mississippi, and at Mobile, Alabama, indicate trends of water-surface elevations increasing with time (relative sea-level rise). The trends indicated by the COE data were compared to relative sea-level trends indicated by the National Ocean Survey gages in the Gulf of Mexico. The average global rate of sea level rise has been suggested to approach about 2 mm/yr (0.007 ft/yr). Some leading scientists have suggested rates of sea level rise that are greater than 2 mm/yr, when accounting for effects of greenhouse gas emissions. As the sea level rises and inundates the coastal plain, structures along the existing coast and structures located in the back bays of estuaries will be even more adversely affected by future flooding. Also, if the land surface adjacent to the water also sinks due to soil compaction and other geologic processes (collectively call subsidence), additional land will be inundated. Copyright ASCE 2004.

  15. Catalase is a determinant of the colonization and transovarial transmission of Rickettsia parkeri in the Gulf Coast tick Amblyomma maculatum.

    PubMed

    Budachetri, K; Kumar, D; Karim, S

    2017-08-01

    The Gulf Coast tick (Amblyomma maculatum) has evolved as a competent vector of the spotted-fever group rickettsia, Rickettsia parkeri. In this study, the functional role of catalase, an enzyme responsible for the degradation of toxic hydrogen peroxide, in the colonization of the tick vector by R. parkeri and transovarial transmission of this pathogen to the next tick generation, was investigated. Catalase gene (CAT) expression in midgut, salivary glands and ovarian tissues exhibited a 2-11-fold increase in transcription level upon R. parkeri infection. Depletion of CAT transcripts using an RNA-interference approach significantly reduced R. parkeri infection levels in midgut and salivary gland tissues by 53-63%. The role of CAT in transovarial transmission of R. parkeri was confirmed by simultaneously blocking the transcript and the enzyme by injecting double-stranded RNA for CAT and a catalase inhibitor (3-amino-1,2,4-triazole) into gravid females. Simultaneous inhibition of the CAT transcript and the enzyme significantly reduced the egg conversion ratio with a 44% reduction of R. parkeri transovarial transmission. These data suggest that catalase is required for rickettsial colonization of the tick vector and transovarial transmission to the next generation. © 2017 The Royal Entomological Society.

  16. Behavioral health in the gulf coast region following the Deepwater Horizon oil spill: findings from two federal surveys.

    PubMed

    Gould, Deborah W; Teich, Judith L; Pemberton, Michael R; Pierannunzi, Carol; Larson, Sharon

    2015-01-01

    This article summarizes findings from two large-scale, population-based surveys conducted by Substance Abuse and Mental Health Services Administration (SAMHSA) and Centers for Disease Control and Prevention (CDC) in the Gulf Coast region following the 2010 Deepwater Horizon oil spill, to measure the prevalence of mental and substance use disorders, chronic health conditions, and utilization of behavioral health services. Although many area residents undoubtedly experienced increased levels of anxiety and stress following the spill, findings suggest only modest or minimal changes in behavioral health at the aggregate level before and after the spill. The studies do not address potential long-term effects of the spill on physical and behavioral health nor did they target subpopulations that might have been most affected by the spill. Resources mobilized to reduce the economic and behavioral health impacts of the spill on coastal residents-including compensation for lost income from BP and increases in available mental health services-may have resulted in a reduction in potential mental health problems.

  17. Ecoregional linkages between DOM optical properties, landscape-watershed attributes and climatology in Florida Gulf Coast Rivers

    NASA Astrophysics Data System (ADS)

    Conmy, R. N.; Lehrter, J. C.; Coble, P. G.

    2009-12-01

    Downstream water quality and clarity is heavily dependent on landscape and watershed attributes of neighboring terrestrial zones. This is especially true for river-dominated margins, such as Florida’s Gulf Coast, where numerous rivers impact sensitive coastal habitats via delivery of ecosystem-relevant constituents. One such component is Dissolved Organic Matter (DOM) whose complexity makes elucidation of its regional sources, transformations and fate quite challenging. The chromophoric portion of the pool, CDOM, provides a means of tracking DOM and inferring its lability through the terrestrial-aquatic continuum using spectroscopic techniques. Discussed here will be how optical properties, such as absorption coefficients, spectral slopes, fluorescence efficiencies, intensity, ratios and DOC concentrations vary spatially and temporally for select watersheds. These include the Apalachicola, Suwannee, Tampa Bay, Charlotte Harbor and the Shark Rivers. Empirical relationships between landscape attributes (soil type, slope, permeability, LULC), precipitation, river discharge, DOM optical properties, nutrients and DOC concentration will also be examined over four sampling periods during 2003-2005. Results of this work will be used to develop predictive models of downstream DOM quality and quantity that enters various rivers and estuaries. This has implications for characterizing the role of DOM as a contributor to downstream metabolism, water clarity, and as a nutrient source.

  18. Geology and development history of Jennings salt dome 1901-1985: clue to future of Gulf Coast salt domes

    SciTech Connect

    Cook, J.C.; Harrison, F.W. Jr.

    1986-05-01

    Historically, salt domes have been the primary target of oil and gas exploration in the Texas and Louisiana Gulf Coast. In south Louisiana, the 89 piercement salt dome fields discovered since 1901 have produced 6,492,462,685 bbl of oil and condensate, representing approximately 60% of all oil and condensate produced in south Louisiana. Because of the tremendous volume of oil already extracted, there may be doubt about finding significant reserves on these features in the future. A current review of Jennings salt dome, the first Louisiana oil field, however, suggests that south Louisiana piercement domes still have large undiscovered reserves. Jennings dome, which has produced continuously since its discovery in 1901, has produced, as of 1985, 115 million bbl of oil and condensate. Its long and active exploration history is representative of many piercement domes in south Louisiana. A combination of characteristics explain why Jennings, as well as other domes, continues to be the focus of major exploration efforts. Piercement salt domes are generally complex both stratigraphically and structurally because of their geologic origin. Prolific high-angle faulting coupled with depositional unconformities and rapid stratigraphic changes make it difficult to determine accurately the precise nature and extent of existing hydrocarbon traps. Additional, the occurrence of multiple sand reservoirs and outstanding recovery rates of oil in place result in areally small reservoirs that contain substantial reserves.

  19. A Late Holocene Record of Human Impact in the Tropical Lowlands of the Mexican Gulf Coast: Lago Verde.

    NASA Astrophysics Data System (ADS)

    Socorro, L.; Sosa, S.; Caballero, M.; Rodriguez, A.; Ortega, B.

    2005-05-01

    Lago Verde is a maar lake (18 36 43 N; 95 20 52 W) located on the Gulf Coast of Mexico in "Los Tuxtlas" region. The area was cover by tropical rain forest and is part of the core area of the earliest Mesoamerican cultures. A 6 m sediment core was obtained in order to document vegetation and lake level history of this area. Lago Verde is a shallow, eutrophic lake (max. 4 m), the natural vegetation has been removed and grasslands with some tropical trees such Bursera grows around the lake. According with the radiocarbon chronology the sequence covers the last 2500 yr BP. At the base of the sequence low abundance of tropical trees is record, with intermediate lake levels. A sudden change in the pollen stratigraphy occurs at ca. 2000 yr BP, with important presence of Poaceae, Ambrosia and Cheno.-Am. along with Zea mays indicating human activity in the area. This is associated with a change in limnological conditions, recording turbid, shallow environments. This pollen signals correlates with dry phases in Yucatan, suggesting that this dry climatic signal probably had effect on an ample area of Mexico. However, at 1200 yr BP, no more Zea mays pollen is recovered suggesting the abandonment of the area. Lake levels recover as well as the tropical forest. The last 150 yr BP is characterized by the reduction in the pollen of tropical forest trees, presence of Zea mays, increased erosion rates, turbidity and eutrophication in the lake, all related to deforestation.

  20. Diagenesis, compaction, and fluid chemistry modeling of a sandstone near a pressure seal: Lower Tuscaloosa Formation, Gulf Coast

    USGS Publications Warehouse

    Weedman, S.D.; Brantley, S.L.; Shiraki, R.; Poulson, S.R.

    1996-01-01

    Petrographic, isotopic, and fluid-inclusion evidence from normally and overpressured sandstones of the lower Tuscaloosa Formation (Upper Cretaceous) in the Gulf Coast documents quartz-overgrowth precipitation at 90??C or less, calcite cement precipitation at approximately 100?? and 135??C, and prismatic quartz cement precipitation at about 125??C. Textural evidence suggests that carbonate cement dissolution occurred before the second phases of calcite and quartz precipitation, and was followed by precipitation of grain-rimming chlorite and pore-filling kaolinite. Geochemical calculations demonstrate that present-day lower Tuscaloosa Formation water from 5500 m depth could either dissolve or precipitate calcite cements in model simulations of upward water flow. Calcite dissolution or precipitation depends on PCO2 variability with depth (i.e., whether there is one or two-phase flow) or on the rate of generation of CO2 with depth. Calculations suggest that 105-106 rock volumes of water are required to flow through the section to precipitate 1-10% calcite cement. Compaction analysis suggests that late-stage compaction occurred in normally pressured sandstones after dissolution of carbonate cements, but was hindered in overpressured sandstones despite the presence of high porosity. These results document the inhibition of compaction by overpressured fluids and constrain the timing of pressure seal formation. Modeling results demonstrate that the proposed paragenesis used to constrain timing of pressure seal formation is feasible, and that most of the cement diagenesis occurred before the pressure seal became effective as a permeability barrier.

  1. Antimicrobial properties of cultivable bacteria associated with seaweeds in the Gulf of Mannar on the southeast coast of India.

    PubMed

    Thilakan, B; Chakraborty, K; Chakraborty, R D

    2016-08-01

    In this study, 234 bacterial strains were isolated from 7 seaweed species in the Gulf of Mannar on the southeast coast of India. The strains having consistent antimicrobial activity were chosen for further studies, and this constituted about 9.8% of the active strains isolated. Phylogenetic analysis using 16S rDNA sequencing with the help of classical biochemical identification indicated the existence of 2 major phyla, Firmicutes and Proteobacteria. Antimicrobial activity analysis combined with the results of amplifying genes encoding for polyketide synthetase and nonribosomal peptide synthetase showed that seaweed-associated bacteria had broad-spectrum antimicrobial activity. These epibionts might be beneficial to seaweeds by limiting or preventing the development of competing or fouling bacteria. Phylogenetic analysis of ketosynthase (KS) regions with respect to the diverse range of KS domains showed that the KS domains from the candidate isolates were of Type I. The bacterial cultures retained their antimicrobial activities after plasmid curing, which further suggested that the antimicrobial activity of these isolates was not encoded by plasmid, and the genes encoding the antimicrobial product might be present within the genome. Seaweed-associated bacteria with potential antimicrobial activity suggested that the seaweed species are an ideal ecological niche harboring specific bacterial diversity representing a largely underexplored source of antimicrobial secondary metabolites.

  2. Behavioral Health in the Gulf Coast Region Following the Deepwater Horizon Oil Spill: Findings from Two Federal Surveys

    PubMed Central

    Gould, Deborah W.; Pemberton, Michael R.; Pierannunzi, Carol; Larson, Sharon

    2015-01-01

    This article summarizes findings from two large-scale, population-based surveys conducted by Substance Abuse and Mental Health Services Administration (SAMHSA) and Centers for Disease Control and Prevention (CDC) in the Gulf Coast region following the 2010 Deepwater Horizon oil spill, to measure the prevalence of mental and substance use disorders, chronic health conditions, and utilization of behavioral health services. Although many area residents undoubtedly experienced increased levels of anxiety and stress following the spill, findings suggest only modest or minimal changes in behavioral health at the aggregate level before and after the spill. The studies do not address potential long-term effects of the spill on physical and behavioral health nor did they target subpopulations that might have been most affected by the spill. Resources mobilized to reduce the economic and behavioral health impacts of the spill on coastal residents—including compensation for lost income from BP and increases in available mental health services—may have resulted in a reduction in potential mental health problems. PMID:25339594

  3. Effects of climate change on freshwater ecosystems of the south-eastern United States and the Gulf Coast of Mexico

    USGS Publications Warehouse

    Mulholland, P.J.; Best, G.R.; Coutant, C.C.; Hornberger, G.M.; Meyer, J.L.; Robinson, P.J.; Stenberg, J.R.; Turner, R.E.; Vera-Herrera, F.; Wetzel, R.G.

    1997-01-01

    The south-eastern United States and Gulf Coast of Mexico is physiographically diverse, although dominated by a broad coastal plain. Much of the region has a humid, warm temperate climate with little seasonality in precipitation but strong seasonality in runoff owing to high rates of summer evapotranspiration. The climate of southern Florida and eastern Mexico is subtropical with a distinct summer wet season and winter dry season. Regional climate models suggest that climate change resulting from a doubling of the pre-industrial levels of atmospheric CO2 may increase annual air temperatures by 3-4??C. Changes in precipitation are highly uncertain, but the most probable scenario shows higher levels over all but the northern, interior portions of the region, with increases primarily occurring in summer and occurring as more intense or clustered storms. Despite the increases in precipitation, runoff is likely to decline over much of the region owing to increases in evapotranspiration exceeding increases in precipitation. Only in Florida and the Gulf Coast areas of the US and Mexico are precipitation increases likely to exceed evapotranspiration increases, producing an increase in runoff. However, increases in storm intensity and clustering are likely to result in more extreme hydrographs, with larger peaks in flow but lower baseflows and longer periods of drought. The ecological effects of climate change on freshwaters of the region include: (1) a general increase in rates of primary production, organic matter decomposition and nutrient cycling as a result of higher temperatures and longer growing seasons: (2) reduction in habitat for cool water species, particularly fish and macroinvertebrates in Appalachian streams; (3) reduction in water quality and in suitable habitat in summer owing to lower baseflows and intensification of the temperature-dissolved oxygen squeeze in many rivers and reservoirs; (4) reduction in organic matter storage and loss of organisms during

  4. Effects of Climate Change on Freshwater Ecosystems of the South-Eastern United States and the Gulf Coast of Mexico

    NASA Astrophysics Data System (ADS)

    Mulholland, Patrick J.; Best, G. Ronnie; Coutant, Charles C.; Hornberger, George M.; Meyer, Judy L.; Robinson, Peter J.; Stenberg, John R.; Turner, R. Eugene; Vera-Herrera, Francisco; Wetzel, Robert G.

    1997-06-01

    The south-eastern United States and Gulf Coast of Mexico is physiographically diverse, although dominated by a broad coastal plain. Much of the region has a humid, warm temperate climate with little seasonality in precipitation but strong seasonality in runoff owing to high rates of summer evapotranspiration. The climate of southern Florida and eastern Mexico is subtropical with a distinct summer wet season and winter dry season. Regional climate models suggest that climate change resulting from a doubling of the pre-industrial levels of atmospheric CO2 may increase annual air temperatures by 3-4°C. Changes in precipitation are highly uncertain, but the most probable scenario shows higher levels over all but the northern, interior portions of the region, with increases primarily occurring in summer and occurring as more intense or clustered storms. Despite the increases in precipitation, runoff is likely to decline over much of the region owing to increases in evapotranspiration exceeding increases in precipitation. Only in Florida and the Gulf Coast areas of the US and Mexico are precipitation increases likely to exceed evapotranspiration increases, producing an increase in runoff. However, increases in storm intensity and clustering are likely to result in more extreme hydrographs, with larger peaks in flow but lower baseflows and longer periods of drought.The ecological effects of climate change on freshwaters of the region include: (1) a general increase in rates of primary production, organic matter decomposition and nutrient cycling as a result of higher temperatures and longer growing seasons: (2) reduction in habitat for cool water species, particularly fish and macroinvertebrates in Appalachian streams; (3) reduction in water quality and in suitable habitat in summer owing to lower baseflows and intensification of the temperature-dissolved oxygen squeeze in many rivers and reservoirs; (4) reduction in organic matter storage and loss of organisms during

  5. Water-quality assessment of the Trinity River basin, Texas : ground-water quality of the Trinity, Carrizo-Wilcox, and Gulf Coast aquifers, February-August 1994

    USGS Publications Warehouse

    Reutter, David C.; Dunn, David D.

    2000-01-01

    Ground-water samples were collected from wells in the outcrops of the Trinity, Carrizo-Wilcox, and Gulf Coast aquifers during February-August 1994 to determine the quality of ground water in the three major aquifers in the Trinity River Basin study unit, Texas. These samples were collected and analyzed for selected properties, nutrients, major inorganic constituents, trace elements, pesticides, dissolved organic carbon, total phenols, methylene blue active substances, and volatile organic compounds as part of the U.S. Geological Survey National Water-Quality Assessment Program. Quality-control practices included the collection and analysis of blank, duplicate, and spiked samples. Samples were collected from 12 shallow wells (150 feet or less) and from 12 deep wells (greater than 150 feet) in the Trinity aquifer, 11 shallow wells and 12 deep wells in the Carrizo-Wilcox aquifer, and 14 shallow wells and 10 deep wells in the Gulf Coast aquifer. The three aquifers had similar water chemistries-calcium was the dominant cation and bicarbonate the dominant anion. Statistical tests relating well depths to concentrations of nutrients and major inorganic constituents indicated correlations between well depth and concentrations of ammonia nitrogen, nitrite plus nitrate nitrogen, bicarbonate, sodium, and dissolved solids in the Carrizo-Wilcox aquifer and between well depth and concentrations of sulfate in the Gulf Coast aquifer. The tests indicated no significant correlations for the Trinity aquifer. Concentrations of dissolved solids were larger than the secondary maximum contaminant level of 500 milligrams per liter established for drinking water by the U.S. Environmental Protection Agency in 12 wells in the Trinity aquifer, 4 wells in the Carrizo-Wilcox aquifer, and 6 wells in the Gulf Coast aquifer. Iron concentrations were larger than the secondary maximum contaminant level of 300 micrograms per liter in at least 3 samples from each aquifer, and manganese concentrations

  6. Using landscape typologies to model socioecological systems: Application to agriculture of the United States Gulf Coast

    SciTech Connect

    Preston, Benjamin L.; King, Anthony Wayne; Mei, Rui; Nair, Sujithkumar Surendran

    2016-02-11

    Agricultural enterprises are vulnerable to the effects of climate variability and change. Improved understanding of the determinants of vulnerability and adaptive capacity in agricultural systems is important for projecting and managing future climate risk. At present, three analytical tools dominate methodological approaches to understanding agroecological vulnerability to climate: process-based crop models, empirical crop models, and integrated assessment models. A common weakness of these approaches is their limited treatment of socio-economic conditions and human agency in modeling agroecological processes and outcomes. This study proposes a framework that uses spatial cluster analysis to generate regional socioecological typologies that capture geographic variance in regional agricultural production and enable attribution of that variance to climatic, topographic, edaphic, and socioeconomic components. This framework was applied to historical corn production (1986-2010) in the U.S. Gulf of Mexico region as a testbed. The results demonstrate that regional socioeconomic heterogeneity is an important driving force in human dominated ecosystems, which we hypothesize, is a function of the link between socioeconomic conditions and the adaptive capacity of agricultural systems. Meaningful representation of future agricultural responses to climate variability and change is contingent upon understanding interactions among biophysical conditions, socioeconomic conditions, and human agency their incorporation in predictive models.

  7. Oil and gas developments in Louisiana Gulf Coast onshore in 1987

    SciTech Connect

    Morris, F.R.; Brister, M.R.

    1988-10-01

    During 1987, a total of 632 wells were drilled in offshore Louisiana, a decrease of 40 wells from 1986. The overall success rate increased slightly from 57% in 1986 to 60% in 1987. The success rate for new-field wildcats increased to 37% from 24% in 1986 with about the same number of wells drilled. The number of other exploratory wells increased by about 51%, with nearly the same success rate (50%) as in 1986. The number of drilling platforms installed increased 100% compared with the sharp decline in 1986. Geophysical activity increased 39% from 1986 to 726.5 crew-weeks. Federal OCS Lease Sale 110, held April 22, 1987, signaled a recovery in Gulf of Mexico exploration activity. Fifty-one companies exposed a total $341,540,856 in bids for 313 tracts. The government accepted bids on 293 tracts for a total of $262,971,486. Liquids production during 1987 decreased 2% to 324 million bbl. Gas production increased 13% to 3,469 bcf from 1986 levels. 2 figs., 6 tabs.

  8. Energy balance of a high marsh on the Texas Gulf Coast: Effect of water availability

    NASA Astrophysics Data System (ADS)

    Heilman, J. L.; Heinsch, F. A.; Cobos, D. R.; McInnes, K. J.

    2000-09-01

    The supply of water to the Nueces River Delta near Corpus Christi, Texas, and its estuarine marshes is limited by low tidal ranges in the Gulf of Mexico and by channelization of the Nueces River which restricts freshwater inflow. Micrometeorological measurements were made at the upper end (high marsh) of the delta to determine how daily and seasonal changes in the surface energy balance were affected by availability of water. The marsh consists of shallow ponds interconnected by narrow channels, and elevated areas containing emergent vegetation. During the spring and fall when ponds were flooded, latent and sensible heat flux averaged 67% and 30%, respectively, of net radiation. In the summer when ponds dried, energy partitioning was reversed with sensible heat flux accounting for 65% of net radiation and latent heat accounting for 27%. When ponds were flooded, heat storage in the water column was the major component of storage heat flux. When ponds dried, storage heat flux was controlled by sediment water content, largely through its effect on thermal diffusivity. The ratio of actual to equilibrium evaporation averaged 0.7 in the spring and fall, and 0.3 in the summer, indicating that the marsh behaved more like a dryland ecosystem than a wetland.

  9. Using landscape typologies to model socioecological systems: Application to agriculture of the United States Gulf Coast

    DOE PAGES

    Preston, Benjamin L.; King, Anthony Wayne; Mei, Rui; ...

    2016-02-11

    Agricultural enterprises are vulnerable to the effects of climate variability and change. Improved understanding of the determinants of vulnerability and adaptive capacity in agricultural systems is important for projecting and managing future climate risk. At present, three analytical tools dominate methodological approaches to understanding agroecological vulnerability to climate: process-based crop models, empirical crop models, and integrated assessment models. A common weakness of these approaches is their limited treatment of socio-economic conditions and human agency in modeling agroecological processes and outcomes. This study proposes a framework that uses spatial cluster analysis to generate regional socioecological typologies that capture geographic variance inmore » regional agricultural production and enable attribution of that variance to climatic, topographic, edaphic, and socioeconomic components. This framework was applied to historical corn production (1986-2010) in the U.S. Gulf of Mexico region as a testbed. The results demonstrate that regional socioeconomic heterogeneity is an important driving force in human dominated ecosystems, which we hypothesize, is a function of the link between socioeconomic conditions and the adaptive capacity of agricultural systems. Meaningful representation of future agricultural responses to climate variability and change is contingent upon understanding interactions among biophysical conditions, socioeconomic conditions, and human agency their incorporation in predictive models.« less

  10. Petrosia testudinaria as a biomarker for metal contamination at Gulf of Mannar, southeast coast of India.

    PubMed

    Rao, J Venkateswara; Kavitha, P; Reddy, N Chakra; Rao, T Gnaneshwar

    2006-10-01

    Coastal marine ecosystems in many parts of the world are under unrelenting stress caused by urban development, pollutants and other ecological impacts such as building of infrastructure, land reclamation for port and industrial development, habitat modification, tourism and recreational activities. The present work is a first extensive field study using the marine sponge, Petrosia testudinaria as a biomarker to detect heavy metal pollution between near and off shore environment of 'Gulf of Mannar', India. Sponges were collected from near shore (0.5-1 km) and offshore (5-7 km), locations and their metal concentrations were determined by inductively coupled plasma-mass spectrometry (ICPMS). Our results show that the near shore sponge accumulated greater concentrations of heavy metals (Al, Fe, Mn, As, Ni, Co, Cu, Se) ranging from 0.13 to 64 times higher concentration than the sponges located away from the shore. The results indicate that the accumulated metals alter the macromolecule composition (sugars, proteins and lipids) in near shore sponges. Frequent monitoring is necessary to assess the eco-health of the marine environment by choosing bioindicator species like sponges, which provide accurate, reliable measurement of environmental quality.

  11. Refining the model of barrier island formation along a paraglacial coast in the Gulf of Maine

    USGS Publications Warehouse

    Hein, Christopher J.; FitzGerald, Duncan M.; Carruthers, Emily A.; Stone, Byron D.; Barnhardt, Walter A.; Gontz, Allen M.

    2012-01-01

    Details of the internal architecture and local geochronology of Plum Island, the longest barrier in the Gulf of Maine, have refined our understanding of barrier island formation in paraglacial settings. Ground-penetrating radar and shallow-seismic profiles coupled with sediment cores and radiocarbon dates provide an 8000-year evolutionary history of this barrier system in response to changes in sediment sources and supply rates as well as variability in the rate of sea-level change. The barrier sequence overlies tills of Wisconsinan and Illinoian glaciations as well as late Pleistocene glaciomarine clay deposited during the post-glacial sea-level highstand at approximately 17 ka. Holocene sediment began accumulating at the site of Plum Island at 7–8 ka, in the form of coarse fluvial channel-lag deposits related to the 50-m wide erosional channel of the Parker River that carved into underlying glaciomarine deposits during a lower stand of sea level. Plum Island had first developed in its modern location by ca. 3.6 ka through onshore migration and vertical accretion of reworked regressive and lowstand deposits. The prevalence of southerly, seaward-dipping layers indicates that greater than 60% of the barrier lithosome developed in its modern location through southerly spit progradation, consistent with a dominantly longshore transport system driven by northeast storms. Thinner sequences of northerly, landward-dipping clinoforms represent the northern recurve of the prograding spit. A 5–6-m-thick inlet-fill sequence was identified overlying the lower stand fluvial deposit; its stratigraphy captures events of channel migration, ebb-delta breaching, onshore bar migration, channel shoaling and inlet infilling associated with the migration and eventual closure of the inlet. This inlet had a maximum cross-sectional area of 2800 m2 and was active around 3.5–3.6 ka. Discovery of this inlet suggests that the tidal prism was once larger than at present. Bay infilling

  12. Biostimulation of indigenous microorganisms for bioremediation of oily hypersaline microcosms from the Arabian Gulf Kuwaiti coasts.

    PubMed

    Al-Mailem, Dina M; Al-Deieg, Maha; Eliyas, Mohamed; Radwan, Samir S

    2017-05-15

    Hypersaline soil and water samples were collected in summer and winter from the "sabkha" area at the Kuwaiti shore of the Arabian Gulf. Physicochemical parameters were analyzed, and found suitable for microbial oil-removal. Summer- and winter-microcosms were treated with individual cation (K(+), Ca(2+), Mg(2+), Fe(3+)) salts, and with animal blood and commercial yeast, as cost-effective vitamin sources. Those microcosms were exposed to the open environment for six winter and six summer months, and analyzed for their hydrocarbonoclastic microorganisms at time zero and in two month intervals. The hydrocarbonoclastic microbial communities in the microcosms consisted of halophilic bacteria and haloarchaea. The constituent bacterial species varied according to the season. Three species, Dietzia kunjamensis, Marinobacter lacisalsi and Halomonas oxialensis consistently occurred both in summer- and winter-samples, but the remaining species were different. On the other hand, the haloarchaeal communities in summer and winter were quite similar, and consisted mainly of Haloferax spp and Halobacterium spp. Treating the microcosms with cations and with vitamin-containing natural products enhanced microbial numbers and oil-removal. The effectiveness of the cations in oil-removal was in the order; Fe(3+) (94%) > Ca(2+) (89%) > Mg(2+) (85%) > K(+) (82%). Thus, oily microcosms amended with trivalent and divalent cations lost most of the oil, and those amended with commercial yeast and with animal blood, as vitamin sources, lost 78% and 72% oil, respectively. Copyright © 2017 Elsevier Ltd. All rights reserved.

  13. Shifts in the microbial community composition of Gulf Coast beaches following beach oiling.

    PubMed

    Newton, Ryan J; Huse, Susan M; Morrison, Hilary G; Peake, Colin S; Sogin, Mitchell L; McLellan, Sandra L

    2013-01-01

    Microorganisms associated with coastal sands serve as a natural biofilter, providing essential nutrient recycling in nearshore environments and acting to maintain coastal ecosystem health. Anthropogenic stressors often impact these ecosystems, but little is known about whether these disturbances can be identified through microbial community change. The blowout of the Macondo Prospect reservoir on April 20, 2010, which released oil hydrocarbons into the Gulf of Mexico, presented an opportunity to examine whether microbial community composition might provide a sensitive measure of ecosystem disturbance. Samples were collected on four occasions, beginning in mid-June, during initial beach oiling, until mid-November from surface sand and surf zone waters at seven beaches stretching from Bay St. Louis, MS to St. George Island, FL USA. Oil hydrocarbon measurements and NOAA shoreline assessments indicated little to no impact on the two most eastern beaches (controls). Sequence comparisons of bacterial ribosomal RNA gene hypervariable regions isolated from beach sands located to the east and west of Mobile Bay in Alabama demonstrated that regional drivers account for markedly different bacterial communities. Individual beaches had unique community signatures that persisted over time and exhibited spatial relationships, where community similarity decreased as horizontal distance between samples increased from one to hundreds of meters. In contrast, sequence analyses detected larger temporal and less spatial variation among the water samples. Superimposed upon these beach community distance and time relationships, was increased variability in bacterial community composition from oil hydrocarbon contaminated sands. The increased variability was observed among the core, resident, and transient community members, indicating the occurrence of community-wide impacts rather than solely an overprinting of oil hydrocarbon-degrading bacteria onto otherwise relatively stable sand

  14. Cenozoic structural evolution and tectono-stratigraphic framework of the northern Gulf Coast continental margin

    SciTech Connect

    Diegel, F.A.; Karlo, J.F.; Shoup, R.C.; Schuster, D.C.

    1996-12-31

    The Cenozoic structural evolution of the northern Gulf of Mexico Basin is controlled by progradation over deforming, largely allochthonous salt structures derived from an underlying autochthonous Jurassic salt. The wide variety of structural styles is due to a combination of (1) original distribution of Jurassic and Mesozoic salt structures, (2) different slope depositional environments during the Cenozoic, and (3) varying degrees of salt withdrawal from allochthonous salt sheets. Tectono-stratigraphic provinces describe regions of contrasting structural styles and ages. Provinces include (1) a contractional foldbelt province, (2) a tabular salt-minibasin-province, (3) a Pliocene-Pleistocene detachment province, (4) a salt dome-minibasin province, (5) an Oligocene-Miocene detachment province, (6) a lower Oligocene Vicksburg detachment province, (7) an upper Eocene detachment province, and (8) the Wilcox growth fault province of Paleocene-Eocene age. Within several tectono-stratigraphic provinces, shale-based detachment systems, dominated by lateral extension, and allochthonous salt-based detachment systems, dominated by subsidence, can be distinguished by geometry, palinspastic reconstructions, and subsidence analysis. Many shale-based detachments are linked downdip to deeper salt-based detachments. Large extensions above detachments are typically balanced by salt withdrawal. Salt-withdrawal minibasins with flanking salt bodies occur as both isolated structural systems and components of salt-based detachment systems. During progradation, progressive salt withdrawal from tabular salt bodies on the slope formed salt-bounded minibasins which, on the shelf, evolved into minibasins bounded by arcuate growth faults and remnant salt bodies. Associated secondary salt bodies above allochthonous salt evolved from pillows, ridges, and massifs to leaning domes and steep-sided stocks.

  15. Shifts in the Microbial Community Composition of Gulf Coast Beaches Following Beach Oiling

    PubMed Central

    Newton, Ryan J.; Huse, Susan M.; Morrison, Hilary G.; Peake, Colin S.; Sogin, Mitchell L.; McLellan, Sandra L.

    2013-01-01

    Microorganisms associated with coastal sands serve as a natural biofilter, providing essential nutrient recycling in nearshore environments and acting to maintain coastal ecosystem health. Anthropogenic stressors often impact these ecosystems, but little is known about whether these disturbances can be identified through microbial community change. The blowout of the Macondo Prospect reservoir on April 20, 2010, which released oil hydrocarbons into the Gulf of Mexico, presented an opportunity to examine whether microbial community composition might provide a sensitive measure of ecosystem disturbance. Samples were collected on four occasions, beginning in mid-June, during initial beach oiling, until mid-November from surface sand and surf zone waters at seven beaches stretching from Bay St. Louis, MS to St. George Island, FL USA. Oil hydrocarbon measurements and NOAA shoreline assessments indicated little to no impact on the two most eastern beaches (controls). Sequence comparisons of bacterial ribosomal RNA gene hypervariable regions isolated from beach sands located to the east and west of Mobile Bay in Alabama demonstrated that regional drivers account for markedly different bacterial communities. Individual beaches had unique community signatures that persisted over time and exhibited spatial relationships, where community similarity decreased as horizontal distance between samples increased from one to hundreds of meters. In contrast, sequence analyses detected larger temporal and less spatial variation among the water samples. Superimposed upon these beach community distance and time relationships, was increased variability in bacterial community composition from oil hydrocarbon contaminated sands. The increased variability was observed among the core, resident, and transient community members, indicating the occurrence of community-wide impacts rather than solely an overprinting of oil hydrocarbon-degrading bacteria onto otherwise relatively stable sand

  16. Salinity variations and chemical compositions of waters in the Frio Formation, Texas Gulf Coast. Annual report

    SciTech Connect

    Morton, R.A.; Garrett, C.M. Jr.; Posey, J.S.; Han, J.H.; Jirik, L.A.

    1981-11-01

    Waters produced from sandstone reservoirs of the deep Frio Formation exhibit spatial variations in chemical composition that roughly coincide with the major tectonic elements (Houston and Rio Grande Embayments, San Marcos Arch) and corresponding depositional systems (Houston and Norias deltas, Greta-Carancahua barrier/strandplain system) that were respectively active along the upper, lower, and middle Texas Coast during Frio deposition. Within an area, salinities are usually depth dependent, and primary trends closely correspond to pore pressure gradients and thermal gradients. Where data are available (mainly in Brazoria County) the increases in TDS and calcium with depth coincide with the zone of albitization, smectite-illite transition, and calcite decrease in shales. Waters have fairly uniform salinities when produced from the same sandstone reservoir within a fault block or adjacent fault blocks with minor displacement. In contrast, stratigraphically equivalent sandstones separated by faults with large displacement usually yield waters with substantially different salinities owing to the markedly different thermal and pressure gradients across the faults that act as barriers to fluid movement.

  17. The costs of respiratory illnesses arising from Florida gulf coast Karenia brevis blooms.

    PubMed

    Hoagland, Porter; Jin, Di; Polansky, Lara Y; Kirkpatrick, Barbara; Kirkpatrick, Gary; Fleming, Lora E; Reich, Andrew; Watkins, Sharon M; Ullmann, Steven G; Backer, Lorraine C

    2009-08-01

    Algal blooms of Karenia brevis, a harmful marine algae, occur almost annually off the west coast of Florida. At high concentrations, K. brevis blooms can cause harm through the release of potent toxins, known as brevetoxins, to the atmosphere. Epidemiologic studies suggest that aerosolized brevetoxins are linked to respiratory illnesses in humans. We hypothesized a relationship between K. brevis blooms and respiratory illness visits to hospital emergency departments (EDs) while controlling for environmental factors, disease, and tourism. We sought to use this relationship to estimate the costs of illness associated with aerosolized brevetoxins. We developed a statistical exposure-response model to express hypotheses about the relationship between respiratory illnesses and bloom events. We estimated the model with data on ED visits, K. brevis cell densities, and measures of pollen, pollutants, respiratory disease, and intra-annual population changes. We found that lagged K. brevis cell counts, low air temperatures, influenza outbreaks, high pollen counts, and tourist visits helped explain the number of respiratory-specific ED diagnoses. The capitalized estimated marginal costs of illness for ED respiratory illnesses associated with K. brevis blooms in Sarasota County, Florida, alone ranged from $0.5 to $4 million, depending on bloom severity. Blooms of K. brevis lead to significant economic impacts. The costs of illness of ED visits are a conservative estimate of the total economic impacts. It will become increasingly necessary to understand the scale of the economic losses associated with K. brevis blooms to make rational choices about appropriate mitigation.

  18. Mesohaline submerged aquatic vegetation survey along the U.S. gulf of Mexico coast, 2001 and 2002: A salinity gradient approach

    USGS Publications Warehouse

    Merino, J.H.; Carter, J.; Merino, S.L.

    2009-01-01

    Distribution of marine submerged aquatic vegetation (SAV; i.e., seagrass) in the northern Gulf of Mexico coast has been documented, but there are nonmarine submersed or SAV species occurring in estuarine salinities that have not been extensively reported. We sampled 276 SAV beds along the gulf coast in Florida, Alabama, Mississippi, Louisiana, and Texas in 2001 and 2002 in oligohaline to polyhaline (0 to 36 parts per thousand) waters to determine estuarine SAV species distribution and identify mesohaline SAV communities. A total of 20 SAV and algal species was identified and habitat characteristics such as salinity, water depth, pH, conductivity, turbidity, dissolved oxygen, and sediment composition were collected. Fourteen SAV species occurred two or more times in our samples. The most frequently occurring species was Ruppia maritima L. (n = 148), occurring in over half of SAV beds sampled. Eleocharis sp. (n = 47), characterized with an emergent rather than submerged growth form, was a common genus in the SAV beds sampled. A common marine species was Halodule wrightii Asch. (n = 36). Nonindigenous species Myriophyllum spicatum L. (n = 31) and Hydrilla verticillata (L. f.) Royle (n = 6) were present only in oligohaline water. Analyzing species occurrence and environmental characteristics using canonical correspondence and two-way indicator species analysis, we identify five species assemblages distinguished primarily by salinity and depth. Our survey increases awareness of nonmarine SAV as a natural resource in the gulf, and provides baseline data for future research. ?? 2009 by the Marine Environmental Sciences Consortium of Alabama.

  19. Preliminary results of receiver function analysis of seismic data recorded from a broadband deployment across the Gulf Coast Plain

    NASA Astrophysics Data System (ADS)

    Gurrola, H.; Pratt, K. W.; Pulliam, J.; Dunbar, J. A.

    2011-12-01

    In summer of 2010, 21 broadband seismographs were installed at 16-18 km spacing along a transect running from Johnson City, TX, (on the Edwards Plateau), to Matagorda Island to study the current structure of this rifted passive margin. The large magnetic anomaly that parallels the coast throughout the Gulf region moves on-shore beneath our transect such that we will be able to investigate the source of this anomaly. A second important target that will be imaged in this Balcones fault which is associated with the Ouachita front. This project is funded by a grant from the Norman Hackerman Advanced Research Program (NHARP), a biannual competition among Texas Universities to support research, and makes use of Texas Tech, Baylor, and UT Austin equipment. As a result, the deployment includes a less uniform array of seismic equipment, (10 Trillium compact seismometers and 10 Guralps; including 40Ts, 3Ts and 3ESPs), than projects supported by the IRIS PASSCAL center. Our vault construction was similar to Flexible array vaults, but Gulf Coast provides a more challenging environment for deployment than most encountered in the western US. The shallow water table and loose sediment can become almost fluid when storms deluge the area with rain. In dry periods, mud cracks near the vaults cause the vaults to tilt. As a result, even high quality, shallow seismic vaults can "float" or shift sufficiently to cause one or two components of the seismic stations to drift against their stops in days or weeks. As a result, the only data consistently available from all our stations, are vertical components. Horizontal component data from the summer of 2010 can be hit and miss due to the tilting of the vaults. These issues have been reduced in the summer of 2011 due to the drought. To address the data's shortcomings, we will average the vertical components from our stations and nearby EarthScope TA stations, (up 300 km away), to isolate the cleanest representation of the incoming P

  20. Impacts of Sea Level Rise caused by Climate Change on Saltwater Intrusion into the Gulf Coast Aquifer of South Texas

    NASA Astrophysics Data System (ADS)

    Venkataraman, K.; Uddameri, V.

    2011-12-01

    Coastal aquifers are a vital source of freshwater but are also vulnerable to hydrological problems such as saltwater intrusion, if managed incorrectly. Sea level rise induced by long-term climate change and groundwater development in coastal regions can cause migration of saltwater from the sea to an aquifer. Tide gauge records from Rockport, Port Mansfield and South Padre Island in South Texas indicate that the sea level has risen at a rate of about 0.25 mm/yr to 2.8mm/yr between 1948 and 2003. The Intergovernmental Panel for Climate Change (IPCC; 2007) Global Climate Change Models (GCMs) have projected a sea level rise between 20 cm and 87 cm by the year 2100 across the coastal bend of South Texas. Climate change also impacts groundwater recharge which directly influences the location and behavior of the freshwater-saltwater interface. In semi-arid regions like South Texas, additional factors such as large variability in rainfall, extended periods of droughts and limited availability of natural water resources have led to intensive groundwater extraction, increasing the susceptibility to saltwater intrusion. At present, two-thirds of the water demand is met by groundwater. The population of South Texas is expected to double over the next few decades, with half the population estimated to be living along the coast. As such, there is a need for proper management of water resources to match the trends in climate, economic and demographic changes. In this study, a hydrologic saltwater intrusion model has been developed and coupled with various global climate change models. Numerous model simulations have been performed to assess the combined effect of urbanization, groundwater recharge, and long-term climate change scenarios on saltwater intrusion in the Gulf Coast Aquifer of South Texas. The significance of inland controls versus coastal controls has also been assessed. A decision support system that evaluates uncertainties associated with future groundwater