The Two Rivers of Public Education: Why Our Representative Democracy Relies on Both Individualism and Community to Be Delivered through Its Public Schools

ERIC Educational Resources Information Center

Draayer, Donald

2011-01-01

America is blessed with two river systems that feed and nourish the country by their periodic flooding. One mighty river is "individualism" (the entrepreneurial drive to advance and make a difference). The other river is "community" (wherein communal interests strengthen the whole community over the parts). Monitoring and regulating these two…

36 CFR 7.9 - St. Croix National Scenic Rivers.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 36 Parks, Forests, and Public Property 1 2010-07-01 2010-07-01 false St. Croix National Scenic Rivers. 7.9 Section 7.9 Parks, Forests, and Public Property NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR SPECIAL REGULATIONS, AREAS OF THE NATIONAL PARK SYSTEM § 7.9 St. Croix National Scenic Rivers. (a...

Output improvement of Sg. Piah run-off river hydro-electric station with a new computed river flow-based control system

NASA Astrophysics Data System (ADS)

Jidin, Razali; Othman, Bahari

2013-06-01

The lower Sg. Piah hydro-electric station is a river run-off hydro scheme with generators capable of generating 55MW of electricity. It is located 30km away from Sg. Siput, a small town in the state of Perak, Malaysia. The station has two turbines (Pelton) to harness energy from water that flow through a 7km tunnel from a small intake dam. The trait of a run-off river hydro station is small-reservoir that cannot store water for a long duration; therefore potential energy carried by the spillage will be wasted if the dam level is not appropriately regulated. To improve the station annual energy output, a new controller based on the computed river flow has been installed. The controller regulates the dam level with an algorithm based on the river flow derived indirectly from the intake-dam water level and other plant parameters. The controller has been able to maintain the dam at optimum water level and regulate the turbines to maximize the total generation output.

Delayed effects of flood control on a flood-dependent riparian forest

USGS Publications Warehouse

Katz, Gabrielle L.; Friedman, Jonathan M.; Beatty, Susan W.

2005-01-01

The downstream effects of dams on riparian forests are strongly mediated by the character and magnitude of adjustment of the fluvial–geomorphic system. To examine the effects of flow regulation on sand-bed streams in eastern Colorado, we studied the riparian forest on three river segments, the dam-regulated South Fork Republican River downstream of Bonny Dam, the unregulated South Fork Republican River upstream of Bonny Dam, and the unregulated Arikaree River. Although Bonny Dam significantly reduced peak and mean discharge downstream since 1951, there was little difference in forest structure between the regulated and unregulated segments. On all river segments, the riparian forest was dominated by the native pioneer tree, Populus deltoides, which became established during a period of channel narrowing beginning after the 1935 flood of record and ending by 1965. The nonnative Elaeagnus angustifolia was present on all river segments, with recruitment ongoing. The lack of contrast in forest structure between regulated and unregulated reaches resulted primarily from the fact that no large floods occurred on any of the study segments since dam construction. Most of the riparian forest in the study area was located on the broad narrowing terrace, which was rarely inundated on the unregulated segments, resulting in little contrast with the regulated segment. A minor dam effect occurred on the small modern floodplain, which was actively disturbed on the unregulated segments, but not on the regulated segments. Although Bonny Dam had the potential to significantly influence downstream riparian ecosystems, this influence had not been expressed, and may never be if a large flood does not occur within the lifetime of the dam. Minor dam effects to riparian systems can be expected downstream of large dams in some settings, including the present example in which there was insufficient time for the dam effects to by fully expressed.

78 FR 73092 - Special Regulations; Areas of the National Park System, New River Gorge National River, Bicycling

Federal Register 2010, 2011, 2012, 2013, 2014

2013-12-05

... recreation and tourism activities in southern West Virginia due to its nationally recognized status and has... for tourism and a catalyst for economic development in the New River Gorge area, as it attracts... through a commitment to consultation with Indian tribes and recognition of their right to self-governance...

Water pollution control technology and strategy for river-lake systems: a case study in Gehu Lake and Taige Canal.

PubMed

Zhang, Yimin; Zhang, Yongchun; Gao, Yuexiang; Zhang, Houhu; Cao, Jianying; Cai, Jinbang; Kong, Xiangji

2011-07-01

The Taoge water system is located in the upstream of Taihu Lake basin and is characterized by its multi-connected rivers and lakes. In this paper, current analyses of hydrology, hydrodynamics and water pollution of Gehu Lake and Taige Canal are presented. Several technologies are proposed for pollution prevention and control, and water environmental protection in the Taihu Lake basin. These included water pollution control integration technology for the water systems of Gehu Lake, Taige Canal and Caoqiao River. Additionally, river-lake water quality and quantity regulation technology, ecological restoration technology for polluted and degraded water bodies, and water environmental integration management and optimization strategies were also examined. The main objectives of these strategies are to: (a) improve environmental quality of relative water bodies, prevent pollutants from entering Gehu Lake and Taige Canal, and ensure that the clean water after the pre-treatment through Gehu Lake is not polluted before entering the Taihu Lake through Taige Canal; (b) stably and efficiently intercept and decrease the pollution load entering the lake through enhancing the river outlet ecological system structure function and water self-purifying capacity, and (c) designate Gehu Lake as a regulation system for water quality and water quantity in the Taoge water system and thus guarantee the improvement of the water quality of the inflow into Taihu Lake.

Elements of an environmental decision support system for seasonal wetland salt management in a river basin subjected to water quality regulation

DOE Office of Scientific and Technical Information (OSTI.GOV)

Quinn, N.W.T.

Seasonally managed wetlands in the Grasslands Basin on the west-side of California's San Joaquin Valley provide food and shelter for migratory wildfowl during winter months and sport for waterfowl hunters during the annual duck season. Surface water supply to these wetlands contain salt which, when drained to the San Joaquin River during the annual drawdown period, can negatively impact water quality and cause concern to downstream agricultural riparian water diverters. Recent environmental regulation, limiting discharges salinity to the San Joaquin River and primarily targeting agricultural non-point sources, now also targets return flows from seasonally managed wetlands. Real-time water quality managementmore » has been advocated as a means of continuously matching salt loads discharged from agricultural, wetland and municipal operations to the assimilative capacity of the San Joaquin River. Past attempts to build environmental monitoring and decision support systems (EDSS's) to implement this concept have enjoyed limited success for reasons that are discussed in this paper. These reasons are discussed in the context of more general challenges facing the successful implementation of a comprehensive environmental monitoring, modelling and decision support system for the San Joaquin River Basin.« less

Isolating causal pathways between flow and fish in the regulated river hierarchy

DOE Office of Scientific and Technical Information (OSTI.GOV)

McManamay, Ryan A.; Peoples, Brandon K.; Orth, Donald J.

Unregulated river systems are organized in a hierarchy in which large-scale factors (i.e., landscape and segment scales) influence local habitats (i.e., reach, meso-, and microhabitat scales), and both differentially exert selective pressures on biota. Dams, however, create discontinua in these processes and change the hierarchical structure. We examined the relative roles of hydrology and other instream factors, within a hierarchical landscape context, in organizing fish communities in regulated and unregulated tributaries to the Upper Tennessee River, USA. We also used multivariate regression trees to identify factors that partition fish assemblages based on trait similarities, irrespective of spatial scale. Then, wemore » used classical path analysis and structural equation modeling to evaluate the most plausible hierarchical causal structure of specific trait-based community components, given the data. Both statistical approaches suggested that river regulation affects stream fishes through a variety of reach-scale variables, not always through hydrology itself. Though we observed different changes in flow, temperature, and biotic responses according to regulation types, the most predominant path in which dam regulation affected biota was via temperature alterations. Diversion dams had the strongest effects on fish assemblages. Diversion dams reduced flow magnitudes, leading to declines in fish richness but increased temperatures, leading to lower abundances in equilibrium species and nest guarders. Peaking and run-of-river dams increased flow variability, leading to lower abundances in nest-guarding fishes. Flow displayed direct relationships with biotic responses; however, results indicated that changes in temperature and substrate had equal, if not stronger, effects on fish assemblage composition. The strength and nature of relationships depended on whether flow metrics were standardized for river size. Here, we suggest that restoration efforts in regulated rivers focus on improving flow conditions in conjunction with temperature and substrate restoration.« less

Isolating causal pathways between flow and fish in the regulated river hierarchy

DOE PAGES

McManamay, Ryan A.; Peoples, Brandon K.; Orth, Donald J.; ...

2015-07-07

Unregulated river systems are organized in a hierarchy in which large-scale factors (i.e., landscape and segment scales) influence local habitats (i.e., reach, meso-, and microhabitat scales), and both differentially exert selective pressures on biota. Dams, however, create discontinua in these processes and change the hierarchical structure. We examined the relative roles of hydrology and other instream factors, within a hierarchical landscape context, in organizing fish communities in regulated and unregulated tributaries to the Upper Tennessee River, USA. We also used multivariate regression trees to identify factors that partition fish assemblages based on trait similarities, irrespective of spatial scale. Then, wemore » used classical path analysis and structural equation modeling to evaluate the most plausible hierarchical causal structure of specific trait-based community components, given the data. Both statistical approaches suggested that river regulation affects stream fishes through a variety of reach-scale variables, not always through hydrology itself. Though we observed different changes in flow, temperature, and biotic responses according to regulation types, the most predominant path in which dam regulation affected biota was via temperature alterations. Diversion dams had the strongest effects on fish assemblages. Diversion dams reduced flow magnitudes, leading to declines in fish richness but increased temperatures, leading to lower abundances in equilibrium species and nest guarders. Peaking and run-of-river dams increased flow variability, leading to lower abundances in nest-guarding fishes. Flow displayed direct relationships with biotic responses; however, results indicated that changes in temperature and substrate had equal, if not stronger, effects on fish assemblage composition. The strength and nature of relationships depended on whether flow metrics were standardized for river size. Here, we suggest that restoration efforts in regulated rivers focus on improving flow conditions in conjunction with temperature and substrate restoration.« less

33 CFR 207.380 - Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 33 Navigation and Navigable Waters 3 2012-07-01 2012-07-01 false Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls. 207.380 Section 207.380 Navigation and Navigable... Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls. (a) Parties...

33 CFR 207.380 - Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls. 207.380 Section 207.380 Navigation and Navigable... Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls. (a) Parties...

33 CFR 207.380 - Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 3 2011-07-01 2011-07-01 false Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls. 207.380 Section 207.380 Navigation and Navigable... Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls. (a) Parties...

33 CFR 207.380 - Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 33 Navigation and Navigable Waters 3 2013-07-01 2013-07-01 false Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls. 207.380 Section 207.380 Navigation and Navigable... Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls. (a) Parties...

33 CFR 207.380 - Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 33 Navigation and Navigable Waters 3 2014-07-01 2014-07-01 false Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls. 207.380 Section 207.380 Navigation and Navigable... Red Lake River, Minn.; logging regulations for portion of river above Thief River Falls. (a) Parties...

77 FR 51733 - Special Regulations; Areas of the National Park System, New River Gorge National River, Bicycle...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-08-27

... findings that NERI ``has provided the basis for increased recreation and tourism activities in southern... and recognition of their right to self-governance and tribal sovereignty. We have evaluated this rule...

Tuning stochastic matrix models with hydrologic data to predict the population dynamics of a riverine fish

USGS Publications Warehouse

Sakaris, P.C.; Irwin, E.R.

2010-01-01

We developed stochastic matrix models to evaluate the effects of hydrologic alteration and variable mortality on the population dynamics of a lotie fish in a regulated river system. Models were applied to a representative lotic fish species, the flathead catfish (Pylodictis olivaris), for which two populations were examined: a native population from a regulated reach of the Coosa River (Alabama, USA) and an introduced population from an unregulated section of the Ocmulgee River (Georgia, USA). Size-classified matrix models were constructed for both populations, and residuals from catch-curve regressions were used as indices of year class strength (i.e., recruitment). A multiple regression model indicated that recruitment of flathead catfish in the Coosa River was positively related to the frequency of spring pulses between 283 and 566 m3/s. For the Ocmulgee River population, multiple regression models indicated that year class strength was negatively related to mean March discharge and positively related to June low flow. When the Coosa population was modeled to experience five consecutive years of favorable hydrologic conditions during a 50-year projection period, it exhibited a substantial spike in size and increased at an overall 0.2% annual rate. When modeled to experience five years of unfavorable hydrologic conditions, the Coosa population initially exhibited a decrease in size but later stabilized and increased at a 0.4% annual rate following the decline. When the Ocmulgee River population was modeled to experience five years of favorable conditions, it exhibited a substantial spike in size and increased at an overall 0.4% annual rate. After the Ocmulgee population experienced five years of unfavorable conditions, a sharp decline in population size was predicted. However, the population quickly recovered, with population size increasing at a 0.3% annual rate following the decline. In general, stochastic population growth in the Ocmulgee River was more erratic and variable than population growth in the Coosa River. We encourage ecologists to develop similar models for other lotic species, particularly in regulated river systems. Successful management of fish populations in regulated systems requires that we are able to predict how hydrology affects recruitment and will ultimately influence the population dynamics of fishes. ?? 2010 by the Ecological Society of America.

Landscape level influence: aquatic primary production in the Colorado River of Glen and Grand canyons

NASA Astrophysics Data System (ADS)

Yard, M. D.; Kennedy, T.; Yackulic, C. B.; Bennett, G. E.

2012-12-01

Irregular features common to canyon-bound regions intercept solar incidence (photosynthetic photon flux density [PPFD: μmol m-2 s-1]) and can affect ecosystem energetics. The Colorado River in Grand Canyon is topographically complex, typical of most streams and rivers in the arid southwest. Dam-regulated systems like the Colorado River have reduced sediment loads, and consequently increased water transparency relative to unimpounded rivers; however, sediment supply from tributaries and flow regulation that affects erosion and subsequent sediment transport, interact to create spatial and temporal variation in optical conditions in this river network. Solar incidence and suspended sediment loads regulate the amount of underwater light available for aquatic photosynthesis in this regulated river. Since light availability is depth dependent (Beer's law), benthic algae is often exposed to varying levels of desiccation or reduced light conditions due to daily flow regulation, additional factors that further constrain aquatic primary production. Considerable evidence suggests that the Colorado River food web is now energetically dependent on autotrophic production, an unusual condition since large river foodwebs are typically supported by allochthonous carbon synthesized and transported from terrestrial environments. We developed a mechanistic model to account for these regulating factors to predict how primary production might be affected by observed and alternative flow regimes proposed as part of ongoing adaptive management experimentation. Inputs to our model include empirical data (suspended sediment and temperature), and predictive relationships: 1) solar incidence reaching the water surface (topographic complexity), 2) suspended sediment-light extinction relationships (optical properties), 3) unsteady flow routing model (stage-depth relationship), 4) channel morphology (photosynthetic area), and 5) photosynthetic-irradiant response for dominant algae (Cladophora glomerata and associated epiphytes). Initial findings suggest that aquatic primary production varies spatially and temporally in response to natural processes occurring at varying spatial scales and that flow regulation per se has only a minor effect on primary production. All of these physical drivers combined are likely to structure the abundance, distribution, and interaction of aquatic biota found in this ecosystem.

Hyporheic Zone Residence Time Distributions in Regulated River Corridors

NASA Astrophysics Data System (ADS)

Song, X.; Chen, X.; Shuai, P.; Gomez-Velez, J. D.; Ren, H.; Hammond, G. E.

2017-12-01

Regulated rivers exhibit stage fluctuations at multiple frequencies due to both natural processes (e.g., seasonal cycle) and anthropogenic activities (e.g., dam operation). The interaction between the dynamic river flow conditions and the heterogeneous aquifer properties results in complex hydrologic exchange pathways that are ubiquitous in free-flowing and regulated river corridors. The dynamic nature of the exchange flow is reflected in the residence time distribution (RTD) of river water within the groundwater system, which is a key metric that links river corridor biogeochemical processes with the hydrologic exchange. Understanding the dynamics of RTDs is critical to gain the mechanistic understanding of hydrologic exchange fluxes and propose new parsimonious models for river corridors, yet it is understudied primarily due to the high computational demands. In this study, we developed parallel particle tracking algorithms to reveal how river flow variations affect the RTD of river water in the alluvial aquifer. Particle tracking was conducted using the velocity outputs generated by three-dimensional groundwater flow simulations of PFLOTRAN in a 1600 x 800 x 20m model domain within the DOE Hanford Site. Long-term monitoring data of inland well water levels and river stage were used for eight years of flow simulation. Nearly a half million particles were continually released along the river boundary to calculate the RTDs. Spectral analysis of the river stage data revealed high-frequency (sub-daily to weekly) river stage fluctuations caused by dam operations. The higher frequencies of stage variation were progressively filtered to generate multiple sets of flow boundary conditions. A series of flow simulations were performed by using the filtered flow boundary conditions and various degrees of subsurface heterogeneity to study the relative contribution of flow dynamics and physical heterogeneity on river water RTD. Our results revealed multimodal RTDs of river water as a result of the highly variable exchange pathways driven by interactions between dynamic flow and aquifer heterogeneity. A relationship between the RTD and frequency of flow variation was built for each heterogeneity structure, which can be used to assess the potential ecological consequences of dam operations in regulated rivers.

77 FR 23120 - Special Local Regulations; Lowcountry Splash Open Water Swim, Wando River and Cooper River, Mount...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-18

...-AA08 Special Local Regulations; Lowcountry Splash Open Water Swim, Wando River and Cooper River, Mount... at Patriots Point on the Cooper River. Approximately 600 swimmers will be participating in the swim... Special Local Regulations; Lowcountry Splash Open Water Swim, Wando River and Cooper River, Mount Pleasant...

An integrated water system model considering hydrological and biogeochemical processes at basin scale: model construction and application

NASA Astrophysics Data System (ADS)

Zhang, Y. Y.; Shao, Q. X.; Ye, A. Z.; Xing, H. T.

2014-08-01

Integrated water system modeling is a reasonable approach to provide scientific understanding and possible solutions to tackle the severe water crisis faced over the world and to promote the implementation of integrated river basin management. Such a modeling practice becomes more feasible nowadays due to better computing facilities and available data sources. In this study, the process-oriented water system model (HEXM) is developed by integrating multiple water related processes including hydrology, biogeochemistry, environment and ecology, as well as the interference of human activities. The model was tested in the Shaying River Catchment, the largest, highly regulated and heavily polluted tributary of Huai River Basin in China. The results show that: HEXM is well integrated with good performance on the key water related components in the complex catchments. The simulated daily runoff series at all the regulated and less-regulated stations matches observations, especially for the high and low flow events. The average values of correlation coefficient and coefficient of efficiency are 0.81 and 0.63, respectively. The dynamics of observed daily ammonia-nitrogen (NH4N) concentration, as an important index to assess water environmental quality in China, are well captured with average correlation coefficient of 0.66. Furthermore, the spatial patterns of nonpoint source pollutant load and grain yield are also simulated properly, and the outputs have good agreements with the statistics at city scale. Our model shows clear superior performance in both calibration and validation in comparison with the widely used SWAT model. This model is expected to give a strong reference for water system modeling in complex basins, and provide the scientific foundation for the implementation of integrated river basin management all over the world as well as the technical guide for the reasonable regulation of dams and sluices and environmental improvement in river basins.

An index-based framework for assessing patterns and trends in river fragmentation and flow regulation by global dams at multiple scales

NASA Astrophysics Data System (ADS)

Grill, Günther; Lehner, Bernhard; Lumsdon, Alexander E.; MacDonald, Graham K.; Zarfl, Christiane; Reidy Liermann, Catherine

2015-01-01

The global number of dam constructions has increased dramatically over the past six decades and is forecast to continue to rise, particularly in less industrialized regions. Identifying development pathways that can deliver the benefits of new infrastructure while also maintaining healthy and productive river systems is a great challenge that requires understanding the multifaceted impacts of dams at a range of scales. New approaches and advanced methodologies are needed to improve predictions of how future dam construction will affect biodiversity, ecosystem functioning, and fluvial geomorphology worldwide, helping to frame a global strategy to achieve sustainable dam development. Here, we respond to this need by applying a graph-based river routing model to simultaneously assess flow regulation and fragmentation by dams at multiple scales using data at high spatial resolution. We calculated the cumulative impact of a set of 6374 large existing dams and 3377 planned or proposed dams on river connectivity and river flow at basin and subbasin scales by fusing two novel indicators to create a holistic dam impact matrix for the period 1930-2030. Static network descriptors such as basin area or channel length are of limited use in hierarchically nested and dynamic river systems, so we developed the river fragmentation index and the river regulation index, which are based on river volume. These indicators are less sensitive to the effects of network configuration, offering increased comparability among studies with disparate hydrographies as well as across scales. Our results indicate that, on a global basis, 48% of river volume is moderately to severely impacted by either flow regulation, fragmentation, or both. Assuming completion of all dams planned and under construction in our future scenario, this number would nearly double to 93%, largely due to major dam construction in the Amazon Basin. We provide evidence for the importance of considering small to medium sized dams and for the need to include waterfalls to establish a baseline of natural fragmentation. Our versatile framework can serve as a component of river fragmentation and connectivity assessments; as a standardized, easily replicable monitoring framework at global and basin scales; and as part of regional dam planning and management strategies.

Impacts of Small Scale Flow Regulation on Sediment Dynamics in an Ecologically Important Upland River

NASA Astrophysics Data System (ADS)

Quinlan, E.; Gibbins, C. N.; Batalla, R. J.; Vericat, D.

2015-03-01

Flow regulation is widely recognized as affecting fluvial processes and river ecosystems. Most impact assessments have focused on large dams and major water transfer schemes, so relatively little is known about the impacts of smaller dams, weirs and water diversions. This paper assesses sediment dynamics in an upland river (the Ehen, NW England) whose flows are regulated by a small weir and tributary diversion. The river is important ecologically due to the presence of the endangered freshwater pearl mussel Margaritifera margaritifera, a species known to be sensitive to sedimentary conditions. Fine sediment yield for the 300-m long study reach was estimated to be 0.057 t km-2 year-1, a very low value relative to other upland UK rivers. Mean in-channel storage of fine sediment was also low, estimated at an average of around 40 g m-2. Although the study period was characterized by frequent high flow events, little movement of coarser bed material was observed. Data therefore indicate an extremely stable fluvial system within the study reach. The implication of this stability for pearl mussels is discussed.

Climate Change Impacts on Stream Temperatures in the Columbia River System

NASA Astrophysics Data System (ADS)

Yearsley, J. R.; Crozier, L.

2014-12-01

The Columbia River system, a drainage basin of 668,000 sq. km that includes the Columbia and Snake River rivers, supports a large population of anadromous, cold-water fishes. 13 species of these fishes are listed under the Endangered Species Act and are vulnerable to impacts of climate change. Bioenergetics models for these species have been developed by the federal agencies that operate the Federal Columbia River Power System. These models simulate the impacts on anadromous fishes as they move through the power system both upstream as adults and downstream as juveniles. Water temperature simulations required for input to the bioenergetics models were made for two different segments of the Columbia River system; one being the portions from the Canadian border to Bonneville Dam and the Snake River from Brownlee Dam in Idaho to its confluence and the other, the Salmon River basin in Idaho. Simulations were performed for the period 1928-1998 with the semi-Lagrangian stream temperature model, RBM, for existing conditions and for a two 2040 climate scenarios, a cool, dry condition (ECHO_g model) and a warm, wet condition (MIROC_3.2 model). Natural flows were simulated with the variable infiltration capacity model, VIC, and modified for Columbia River project operations using HYDSIM, a hydro system regulation model that simulates month-to-month operation of the Pacific Northwest hydropower system.

78 FR 49918 - Drawbridge Operation Regulation; Taunton River, Fall River and Somerset, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-16

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2013-0291] RIN 1625-AA09 Drawbridge Operation Regulation; Taunton River, Fall River and Somerset, MA AGENCY: Coast Guard... Operation Regulation: Taunton River, Fall River and Somerset, MA'' in the Federal Register (78 FR 31457). We...

Integrated water system simulation by considering hydrological and biogeochemical processes: model development, with parameter sensitivity and autocalibration

NASA Astrophysics Data System (ADS)

Zhang, Y. Y.; Shao, Q. X.; Ye, A. Z.; Xing, H. T.; Xia, J.

2016-02-01

Integrated water system modeling is a feasible approach to understanding severe water crises in the world and promoting the implementation of integrated river basin management. In this study, a classic hydrological model (the time variant gain model: TVGM) was extended to an integrated water system model by coupling multiple water-related processes in hydrology, biogeochemistry, water quality, and ecology, and considering the interference of human activities. A parameter analysis tool, which included sensitivity analysis, autocalibration and model performance evaluation, was developed to improve modeling efficiency. To demonstrate the model performances, the Shaying River catchment, which is the largest highly regulated and heavily polluted tributary of the Huai River basin in China, was selected as the case study area. The model performances were evaluated on the key water-related components including runoff, water quality, diffuse pollution load (or nonpoint sources) and crop yield. Results showed that our proposed model simulated most components reasonably well. The simulated daily runoff at most regulated and less-regulated stations matched well with the observations. The average correlation coefficient and Nash-Sutcliffe efficiency were 0.85 and 0.70, respectively. Both the simulated low and high flows at most stations were improved when the dam regulation was considered. The daily ammonium-nitrogen (NH4-N) concentration was also well captured with the average correlation coefficient of 0.67. Furthermore, the diffuse source load of NH4-N and the corn yield were reasonably simulated at the administrative region scale. This integrated water system model is expected to improve the simulation performances with extension to more model functionalities, and to provide a scientific basis for the implementation in integrated river basin managements.

Organic compounds in White River water used for public supply near Indianapolis, Indiana, 2002-05

USGS Publications Warehouse

Lathrop, Tim; Moran, Dan

2011-01-01

The National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS) characterized the occurrence of 277 organic compounds in source water (stream water collected before treatment) and finished water (treated water before distribution) from the White River North treatment plant, one of several community water systems that use the White River as its primary water supply (fig. 1). Samples were collected at least monthly during 2002-05 and included 30 source- and 13 finished-water samples. The samples were analyzed for pesticides and selected pesticide degradates (or 'breakdown products'), solvents, gasoline hydrocarbons, disinfection by-products, personal-care and domestic-use products, and other organic compounds. Community water systems are required to monitor for compounds regulated under the Safe Drinking Water Act. Most of the compounds tested in this study are not regulated under U.S. Environmental Protection Agency (USEPA) federal drinking-water standards (U.S. Environmental Protection Agency, 2007a). The White River study is part of the ongoing Source Water-Quality Assessment (SWQA) investigation of community water systems that withdraw from rivers across the United States. More detailed information and references on the sampling-design methodology, specific compounds monitored, and the national study are described by Carter and others (2007).

Soil Gas Dynamics and Microbial Activity in the Unsaturated Zone of a Regulated River

NASA Astrophysics Data System (ADS)

Christensen, H.; Ferencz, S. B.; Cardenas, M. B.; Neilson, B. T.; Bennett, P. C.

2017-12-01

Over 60% of the world's rivers are dammed, and are therefore regulated. In some river systems, river regulation is the dominant factor governing fluid exchange and soil gas dynamics in the hyporheic region and overlying unsaturated zone of the river banks. Where this is the case, it is important to understand the effects that an artificially-induced change in river stage can have on the chemical, plant, and microbial components of the unsaturated zone. Daily releases from an upstream dam cause rapid stage fluctuations in the Lower Colorado River east of Austin, Texas. For this study, we utilized an array of water and gas wells along a transect perpendicular to the river to investigate the biogeochemical process occurring in this mixing zone. The gas wells were installed at several depths up to 1.5 meters, and facilitated the continuous monitoring of soil gases as the pulse percolated through the river bank. Water samples collected from the screened wells penetrated to depths below the water table and were analyzed for nutrients, carbon, and major ions. Additionally, two soil cores were taken at different distances from the river and analyzed for soil moisture and grain size. These cores were also analyzed for microbial activity using the total heterotroph count method and the acetylene inhibition technique, a sensitive method of measuring denitrifying activity. The results provide a detailed picture of soil gas flux and biogeochemical processes in the bank environment in a regulated river. Findings indicate that a river pulse that causes a meter-scale change in river stage causes small, centimeter-scale pulses in the water table. We propose that these conditions create an area of elevated microbial respiration at the base of the unsaturated zone that appears to be decoupled from normal diurnal fluctuations. Along the transect, CO2 concentrations increased with increasing depth down to the water table. CO2 concentrations were highest in the time following a pulse, and the lowest concentrations were recorded following the trough in river stage.

78 FR 28492 - Special Local Regulation; Low Country Splash, Wando River, Cooper River, and Charleston Harbor...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-15

... to the local maritime community via broadcast notice to mariners. 2. Impact on Small Entities Under...-AA08 Special Local Regulation; Low Country Splash, Wando River, Cooper River, and Charleston Harbor... establishing a special local regulation on the waters of the Wando River, Cooper River, and Charleston Harbor...

33 CFR 100.T07-0110 - Special Local Regulations; Low Country Splash, Wando River, Cooper River, and Charleston Harbor...

Code of Federal Regulations, 2014 CFR

2014-07-01

... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Special Local Regulations; Low Country Splash, Wando River, Cooper River, and Charleston Harbor, Charleston, SC. 100.T07-0110 Section 100... Splash, Wando River, Cooper River, and Charleston Harbor, Charleston, SC. (a) Regulated Areas. The...

Description of water-systems operations in the Arkansas River basin, Colorado

USGS Publications Warehouse

Abbott, P.O.

1985-01-01

To facilitate a current project modeling the hydrology of the Arkansas River basin in Colorado, a description of the regulation of water in the basin is necessary. The geographic and climatic setting of the Arkansas River basin that necessitates the use, reuse, importation, and storage of water are discussed. The history of water-resource development in the basin, leading to the present complex of water systems, also is discussed. Municipal, irrigation, industrial, and multipurpose water systems are described. System descriptions are illustrated with schematic line drawings, and supplemented with physical data tables for the lakes, tunnels, conduits, and canals in the various systems. Copies of criteria under which certain of the water systems operate, are included. (USGS)

Effects of Fluctuating River flow on Groundwater/Surface Water Mixing in the Hyporheic Zone of a Regulated, Large Cobble Bed River

DOE Office of Scientific and Technical Information (OSTI.GOV)

Arntzen, Evan V.; Geist, David R.; Dresel, P. Evan

2006-10-31

Physicochemical relationships in the boundary zone between groundwater and surface water (i.e., the hyporheic zone) are controlled by surface water hydrology and the hydrogeologic properties of the riverbed. We studied how sediment permeability and river discharge altered the vertical hydraulic gradient (VHG) and water quality of the hyporheic zone within the Hanford Reach of the Columbia River. The Columbia River at Hanford is a large, cobble-bed river where water level fluctuates up to 2 m daily because of hydropower generation. Concomitant with recording river stage, continuous readings were made of water temperature, specific conductance, dissolved oxygen, and water level ofmore » the hyporheic zone. The water level data were used to calculate VHG between the river and hyporheic zone. Sediment permeability was estimated using slug tests conducted in piezometers installed into the river bed. The response of water quality measurements and VHG to surface water fluctuations varied widely among study sites, ranging from no apparent response to co-variance with river discharge. At some sites, a hysteretic relationship between river discharge and VHG was indicated by a time lag in the response of VHG to changes in river stage. The magnitude, rate of change, and hysteresis of the VHG response varied the most at the least permeable location (hydraulic conductivity (K) = 2.9 x 10-4 cms-1), and the least at the most permeable location (K=8.0 x 10-3 cms-1). Our study provides empirical evidence that sediment properties and river discharge both control the water quality of the hyporheic zone. Regulated rivers, like the Columbia River at Hanford, that undergo large, frequent discharge fluctuations represent an ideal environment to study hydrogeologic processes over relatively short time scales (i.e., days to weeks) that would require much longer periods of time to evaluate (i.e., months to years) in un-regulated systems.« less

78 FR 13479 - Drawbridge Operation Regulation; New Haven Harbor, Quinnipiac and Mill Rivers, CT

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-28

...-AA09 Drawbridge Operation Regulation; New Haven Harbor, Quinnipiac and Mill Rivers, CT AGENCY: Coast... regulations that govern the operation of three bridges across the Quinnipiac and Mill Rivers at New Haven...) entitled ``Drawbridge Operation Regulations New Haven Harbor, Quinnipiac and Mill Rivers,'' in the Federal...

77 FR 21864 - Drawbridge Operation Regulation; Saginaw River, Bay City, MI

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-12

...-AA09 Drawbridge Operation Regulation; Saginaw River, Bay City, MI AGENCY: Coast Guard, DHS. ACTION... Lafayette Street Bridge at mile 6.78, all over the Saginaw River at Bay City, MI. The previous regulation... Operation Regulation; Saginaw River, Bay City, MI, in the Federal Register (76 FR 76637). We received one...

33 CFR 165.510 - Delaware Bay and River, Salem River, Christina River and Schuylkill River-Regulated Navigation Area.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Delaware Bay and River, Salem River, Christina River and Schuylkill River-Regulated Navigation Area. 165.510 Section 165.510... Limited Access Areas Fifth Coast Guard District § 165.510 Delaware Bay and River, Salem River, Christina...

33 CFR 165.510 - Delaware Bay and River, Salem River, Christina River and Schuylkill River-Regulated Navigation Area.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Delaware Bay and River, Salem River, Christina River and Schuylkill River-Regulated Navigation Area. 165.510 Section 165.510... Limited Access Areas Fifth Coast Guard District § 165.510 Delaware Bay and River, Salem River, Christina...

Options for managing hypoxic blackwater events in river systems: a review.

PubMed

Kerr, Janice L; Baldwin, Darren S; Whitworth, Kerry L

2013-01-15

Blackwater events are characterised by a high concentration of dissolved organic carbon in the water column. They occur naturally in lowland rivers with forested floodplains and bring a variety of benefits to both aquatic and floodplain biota. However, particularly when accompanied by high temperatures, respiration of the organic carbon may cause blackwater to become hypoxic. This may lead to a range of lethal and sub-lethal effects on the aquatic biota. We review the current scientific knowledge concerning the management of blackwater and hypoxia, and examine how this knowledge may be applied to the management of hypoxic blackwater events in lowland river systems. A range of management options, which aim to either prevent the development of hypoxic blackwater or to reintroduce oxygen into deoxygenated waters, are reported. Mitigation options that may be applicable to lowland river systems include manipulating the season and magnitude of floods in regulated rivers, increasing roughness in flow paths, establishing oxygenated refugia for aquatic biota and introducing hydraulic structures that promote turbulence and re-aeration. With climatic changes trending towards a scenario where extreme events leading to the development of hypoxic blackwater are more probable, it is now vital to validate and optimise management options on local and regional scales and work towards closing knowledge gaps. With judicious management of regulated rivers, it is possible to minimise the impacts of hypoxic flows while preserving the benefits brought to floodplain and river ecosystems by seasonal flooding and carbon exchange. Crown Copyright © 2012. Published by Elsevier Ltd. All rights reserved.

Influence of summer water-level variability on St. Lawrence River-wetland fish assemblages

USGS Publications Warehouse

McKenna, J.E.; Barkley, J.L.; Johnson, J. H.

2008-01-01

Water-level and associated variability are substantial influences on wetland and shallow aquatic communities. The Akwesasne Wetland Complex is an extensive St. Lawrence River system affected by water regulation. The responses of fish assemblages to short-term summer water-level variation were examined throughout this section of the St. Lawrence River and its tributaries. An influence of water-level variability was detected on abundance of three common species [bluntnose minnow (Pimephales notatus), rock bass (Amboplites rupestris), and white sucker (Catastomus commersonii)] and explained 30-44% of variation. This influence has implications for water regulation and natural resource management, and a larger scope evaluation may reveal more extensive effects.

Global analysis of river systems: from Earth system controls to Anthropocene syndromes.

PubMed Central

Meybeck, Michel

2003-01-01

Continental aquatic systems from rivers to the coastal zone are considered within two perspectives: (i) as a major link between the atmosphere, pedosphere, biosphere and oceans within the Earth system with its Holocene dynamics, and (ii) as water and aquatic biota resources progressively used and transformed by humans. Human pressures have now reached a state where the continental aquatic systems can no longer be considered as being controlled by only Earth system processes, thus defining a new era, the Anthropocene. Riverine changes, now observed at the global scale, are described through a first set of syndromes (flood regulation, fragmentation, sediment imbalance, neo-arheism, salinization, chemical contamination, acidification, eutrophication and microbial contamination) with their related causes and symptoms. These syndromes have direct influences on water uses, either positive or negative. They also modify some Earth system key functions such as sediment, water, nutrient and carbon balances, greenhouse gas emissions and aquatic biodiversity. Evolution of river syndromes over the past 2000 years is complex: it depends upon the stages of regional human development and on natural conditions, as illustrated here for the chemical contamination syndrome. River damming, eutrophication and generalized decrease of river flow due to irrigation are some of the other global features of river changes. Future management of river systems should also consider these long-term impacts on the Earth system. PMID:14728790

77 FR 39630 - Special Local Regulations for Marine Events; Potomac River, National Harbor Access Channel, MD

Federal Register 2010, 2011, 2012, 2013, 2014

2012-07-05

... 1625-AA08 Special Local Regulations for Marine Events; Potomac River, National Harbor Access Channel... special local regulations during the swim segment of the ``Swim Across the Potomac River'' swimming competition, to be held on the waters of the Potomac River on July 8, 2012. These special local regulations...

77 FR 6708 - Special Local Regulations for Marine Events; Potomac River, Charles County, MD

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-09

...-AA08 Special Local Regulations for Marine Events; Potomac River, Charles County, MD AGENCY: Coast Guard... local regulations during the ``Potomac River Sharkfest Swim'' amateur swim, a marine event to be held on the waters of the Potomac River on June 2, 2012. These special local regulations are necessary to...

78 FR 21839 - Drawbridge Operation Regulation; Green River, Small-house, KY and Black River, Jonesboro, LA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-04-12

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2013-0041] RIN 1625-AA09 Drawbridge Operation Regulation; Green River, Small-house, KY and Black River, Jonesboro, LA... drawbridge operation regulation for the drawbridges across Green River, mile 79.6, Small- house, KY and Black...

Hydrological and Meteorological Role of Forests: Implications for the Regulation of Water and Energy Balances

NASA Astrophysics Data System (ADS)

Salazar, J. F.; Villegas, J. C.; Bettin, D. M.; Molina, R.; Henao, J. J.; Rodríguez, E.; Rendón, A.; Hoyos, I.; Poveda, G.

2016-12-01

In last decades, there has been increasing debate about the hydrological and meteorological role of forests, particularly regarding its role in the regulation of the energy and water balances. Here we summarize results from an ongoing research program studying this problem. First, we introduce the notion of ecohydrological scaling to show the existence of two alternative states of regulated or unregulated streamflows in the main tributaries of the Amazon river basin. The transition between both states is associated with the loss of forest cover, with a potential critical threshold at around 40% forest loss in the Amazon. These results imply that large-scale forest loss can force the entire Amazon basin system beyond a critical threshold where its natural streamflow regulation is lost. More generally, our proposed framework provides insights for a physical interpretation of the scaling relations in river basins, as well as foundations and tools to develop early warnings of critical transitions in river basins. Second, we show that long-term rainfall-streamflow ratios converge to low values with low spatial variability in forested basins of the world, independent of location, climatic regime, basin size or forest type. We interpret this as evidence that high forest cover provides long-term regulation of the water balance. Third, we examine the linkage between the presence of tropical forests in South America and the long-term spatial distribution of continental precipitation, and found evidence suggesting that the Amazon forests enhance the atmospheric rivers flowing inland from the Atlantic ocean, particularly during the austral and boreal summers. The associated effects on precipitation may be highly relevant for water availability in river basins located downstream such atmospheric rivers, such as the La Plata and the Orinoco river basins. Finally, we explore the linkage between forest-induced temperature inversions and the vertical transport of atmospheric moisture during the wet and dry seasons in the Amazon, and discuss its potential implications for the partitioning of evapotranspiration and the regulation of the surface energy and water balances. Collectively, our findings suggest that forests are more important to the regulation of the surface water and energy balances than generally assumed.

The Role of Forests in Regulating the River Flow Regime of Large Basins of the World

NASA Astrophysics Data System (ADS)

Salazar, J. F.; Villegas, J. C.; Mercado-Bettin, D. A.; Rodríguez, E.

2016-12-01

Many natural and social phenomena depend on river flow regimes that are being altered by global change. Understanding the mechanisms behind such alterations is crucial for predicting river flow regimes in a changing environment. Here we explore potential linkages between the presence of forests and the capacity of river basins for regulating river flows. Regulation is defined here as the capacity of river basins to attenuate the amplitude of the river flow regime, that is to reduce the difference between high and low flows. We first use scaling theory to show how scaling properties of observed river flows can be used to classify river basins as regulated or unregulated. This parsimonious classification is based on a physical interpretation of the scaling properties (particularly the scaling exponents) that is novel (most previous studies have focused on the interpretation of the scaling exponents for floods only), and widely-applicable to different basins (the only assumption is that river flows in a given river basin exhibit scaling properties through well-known power laws). Then we show how this scaling framework can be used to explore global-change-induced temporal variations in the regulation capacity of river basins. Finally, we propose a conceptual hypothesis (the "Forest reservoir concept") to explain how large-scale forests can exert important effects on the long-term water balance partitioning and regulation capacity of large basins of the world. Our quantitative results are based on data analysis (river flows and land cover features) from 22 large basins of the world, with emphasis in the Amazon river and its main tributaries. Collectively, our findings support the hypothesis that forest cover enhances the capacity of large river basins to maintain relatively high mean river flows, as well as to regulate (ameliorate) extreme river flows. Advancing towards this quantitative understanding of the relation between forest cover and river flow regimes is crucial for water management- and land cover-related decisions.

The Role of Forests in Regulating the River Flow Regime of Large Basins of the World

NASA Astrophysics Data System (ADS)

Salazar, J. F.; Villegas, J. C.; Mercado-Bettin, D. A.; Rodríguez, E.

2017-12-01

Many natural and social phenomena depend on river flow regimes that are being altered by global change. Understanding the mechanisms behind such alterations is crucial for predicting river flow regimes in a changing environment. Here we explore potential linkages between the presence of forests and the capacity of river basins for regulating river flows. Regulation is defined here as the capacity of river basins to attenuate the amplitude of the river flow regime, that is to reduce the difference between high and low flows. We first use scaling theory to show how scaling properties of observed river flows can be used to classify river basins as regulated or unregulated. This parsimonious classification is based on a physical interpretation of the scaling properties (particularly the scaling exponents) that is novel (most previous studies have focused on the interpretation of the scaling exponents for floods only), and widely-applicable to different basins (the only assumption is that river flows in a given river basin exhibit scaling properties through well-known power laws). Then we show how this scaling framework can be used to explore global-change-induced temporal variations in the regulation capacity of river basins. Finally, we propose a conceptual hypothesis (the "Forest reservoir concept") to explain how large-scale forests can exert important effects on the long-term water balance partitioning and regulation capacity of large basins of the world. Our quantitative results are based on data analysis (river flows and land cover features) from 22 large basins of the world, with emphasis in the Amazon river and its main tributaries. Collectively, our findings support the hypothesis that forest cover enhances the capacity of large river basins to maintain relatively high mean river flows, as well as to regulate (ameliorate) extreme river flows. Advancing towards this quantitative understanding of the relation between forest cover and river flow regimes is crucial for water management- and land cover-related decisions.

76 FR 13312 - Drawbridge Operation Regulations; Fox River, Oshkosh, WI

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-11

...-AA09 Drawbridge Operation Regulations; Fox River, Oshkosh, WI AGENCY: Coast Guard, DHS. ACTION: Notice... National Railway Bridge across the Fox River at Mile 55.72 at Oshkosh, Wisconsin. After careful... On December 8, 2010, we published an NPRM entitled Drawbridge Operation Regulation; Fox River...

An environmental streamflow assessment for the Santiam River basin, Oregon

USGS Publications Warehouse

Risley, John C.; Wallick, J. Rose; Mangano, Joseph F.; Jones, Krista L.

2012-01-01

The Santiam River is a tributary of the Willamette River in northwestern Oregon and drains an area of 1,810 square miles. The U.S. Army Corps of Engineers (USACE) operates four dams in the basin, which are used primarily for flood control, hydropower production, recreation, and water-quality improvement. The Detroit and Big Cliff Dams were constructed in 1953 on the North Santiam River. The Green Peter and Foster Dams were completed in 1967 on the South Santiam River. The impacts of the structures have included a decrease in the frequency and magnitude of floods and an increase in low flows. For three North Santiam River reaches, the median of annual 1-day maximum streamflows decreased 42–50 percent because of regulated streamflow conditions. Likewise, for three reaches in the South Santiam River basin, the median of annual 1-day maximum streamflows decreased 39–52 percent because of regulation. In contrast to their effect on high flows, the dams increased low flows. The median of annual 7-day minimum flows in six of the seven study reaches increased under regulated streamflow conditions between 60 and 334 percent. On a seasonal basis, median monthly streamflows decreased from February to May and increased from September to January in all the reaches. However, the magnitude of these impacts usually decreased farther downstream from dams because of cumulative inflow from unregulated tributaries and groundwater entering the North, South, and main-stem Santiam Rivers below the dams. A Wilcox rank-sum test of monthly precipitation data from Salem, Oregon, and Waterloo, Oregon, found no significant difference between the pre-and post-dam periods, which suggests that the construction and operation of the dams since the 1950s and 1960s are a primary cause of alterations to the Santiam River basin streamflow regime. In addition to the streamflow analysis, this report provides a geomorphic characterization of the Santiam River basin and the associated conceptual framework for assessing possible geomorphic and ecological changes in response to river-flow modifications. Suggestions for future biomonitoring and investigations are also provided. This study was one in a series of similar tributary streamflow and geomorphic studies conducted for the Willamette Sustainable Rivers Project. The Sustainable Rivers Project is a national effort by the USACE and The Nature Conservancy to develop environmental flow requirements in regulated river systems.

78 FR 22423 - Drawbridge Operation Regulations; Taunton River, Fall River and Somerset, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-04-16

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2013-0236] Drawbridge Operation Regulations; Taunton River, Fall River and Somerset, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulation. SUMMARY: The Coast Guard is issuing a temporary deviation...

75 FR 51938 - Drawbridge Operation Regulation; Taunton River, Fall River and Somerset, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2010-08-24

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2010-0234] RIN 1625-AA09 Drawbridge Operation Regulation; Taunton River, Fall River and Somerset, MA AGENCY: Coast Guard, DHS. ACTION: Final rule. SUMMARY: The Coast Guard has changed the drawbridge operation regulations...

77 FR 419 - Drawbridge Operation Regulation; St. Johns River, Jacksonville, FL

Federal Register 2010, 2011, 2012, 2013, 2014

2012-01-05

... Operation Regulation; St. Johns River, Jacksonville, FL AGENCY: Coast Guard, DHS. ACTION: Notice of... bridge across the St. Johns River, mile 24.9, in Jacksonville, Florida. The regulation is set forth in 33... automated railroad bridge over the St. Johns River in Jacksonville, Florida. This temporary deviation will...

77 FR 20718 - Drawbridge Operation Regulation; Sacramento River, Isleton, CA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-06

... Operation Regulation; Sacramento River, Isleton, CA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... regulation that governs the Isleton Drawbridge across Sacramento River, mile 18.7, at Isleton, CA. The... operation of the Isleton Drawbridge, mile 18.7, over Sacramento River, at Isleton, CA. The drawbridge...

78 FR 23849 - Inland Waterways Navigation Regulation: Sacramento River, CA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-04-23

...-AB95 Inland Waterways Navigation Regulation: Sacramento River, CA AGENCY: Coast Guard, DHS. ACTION... Regulation: Sacramento River, CA'' in the Federal Register (78 FR 4785). That rule announced our intent to... the Decker Island restricted anchorage area in the Sacramento River. The restricted anchorage area was...

77 FR 63725 - Drawbridge Operation Regulations; Old River, Orwood, CA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-10-17

... BNSF Middle River drawbridge as an alternative path for navigation. DATES: The temporary deviation... Operation Regulation; Old River, Orwood CA'' in the Federal Register (77 FR 58491). The temporary deviation... Operation Regulations; Old River, Orwood, CA AGENCY: Coast Guard, DHS. ACTION: Notice of cancellation of a...

Linking hydrology, morphodynamics and ecology to assess the restoration potential of the heavily regulated Sarca River, NE Italy

NASA Astrophysics Data System (ADS)

Carolli, Mauro; Zolezzi, Guido; Pellegrini, Stefano; Gelmini, Francesca; Deriu, Micaela

2017-04-01

We develop an integrated eco-hydro-morphological quantitative investigation of the upper course of the Alpine Sarca River (NE Italy), for the purpose of assessing its potential in terms of environmental restoration. The Sarca River has been subject to heavy exploitation for hydropower production since the 1950s through a complex infrastructural system. As for many regulated Alpine rivers, increasing local interest has recently been developing to design and implement river restoration measures to improve the environmental conditions and ecosystem services that the river can provide. The aim of the work is to develop and apply a quantitative approach for a preliminary assessment of the successful potential of different river restoration options in the light of the recent eco-hydro-morphological dynamics of the Sarca river system at the catchment scale. The proposed analysis consists of three main steps: (1) detection of the main drivers of flow and sediment supply regimes alteration and characterization of such alteration; (2) a quantification of the effects of those alterations on geomorphic processes and fish habitat conditions; (3) the analysis of the restoration potential in the light of the results of the previous assessment. The analysis is tailored to the existing data availability, which is relatively high as for most river systems of comparable size in Europe, but not as much as in the case of a targeted research project, thus providing a representative case for many other regulated river catchments. Hydrological alteration is quantified by comparing recent (20 years) streamflow time series with a reconstructed series of analogous length, using a hydrological model that has been run excluding any man-made water abstraction, release and artificial reservoirs. upstream and downstream a large dam in the middle course of the river. By choosing the adult marble trout as target (endemic) fish species, effects of the alterations on the temporal and spatial habitat suitability have been assessed by applying a hydraulic-habitat method combined with the streamflow time series. Geomorphological trajectories of the last decades have been reconstructed through the analysis of aerial photos, and the geomorphic effects of flow regime alteration have been assessed in terms of the changes in frequency and duration of gravel-transporting flood events. Results indicate hydropower as one of the drivers of hydro-morphological alteration, with widespread torrent control works in the catchment playing a relevant role in reducing sediment supply. Recent changes in flow management related to the imposition of a Minimum Environmental Flow correspond to significant increase in the continuous duration of suitable habitat events, despite representing only a first step towards a dynamic ecological flow regime. While floods able to drive morphological changes still occurred after regulation, their frequency and duration have dramatically decreased, contributing to channel narrowing and morphological simplification. Overall, the analysis suggests that: (i) morphological river restoration aimed at restoring self-formed morphodynamics can only be effective if designed together with a dynamic geomorphic flow regime, and (ii) dynamic ecological flows should designed with a twofold objective of improving habitat and spawning sites conditions together with recreational uses of the river.

76 FR 27284 - Special Local Regulation; Partnership in Education, Dragon Boat Race; Maumee River, Toledo, OH

Federal Register 2010, 2011, 2012, 2013, 2014

2011-05-11

...-AA08 Special Local Regulation; Partnership in Education, Dragon Boat Race; Maumee River, Toledo, OH... establishing a permanent Special Local Regulation on the Maumee River, Toledo, Ohio. This regulation is... place during the third or fourth weekend in July each year. This special local regulated area is...

Impacts of land use on phosphorus transport in a river system

NASA Astrophysics Data System (ADS)

Wang, J.; Pant, H. K.

2010-12-01

Phosphorus (P) is a primary limiting nutrient in freshwater systems, however, excessive P load in the systems cause eutriphication, resulting in algal blooms and oxygen depletion. This study estimated potential exchange of P between water column and sediments by P sorption, and identified P compounds in sediments by 31Phosphorus Nuclear Magnetic Resonance Spectroscopy in the samples collected from the Bronx River, New York City, NY. Similarly, mineralization, as well as enzymatic hydrolysis using native phosphoatases (NPase) and phosphodiesterase (PDEase) showed that land use changes and other anthropogenic factors had effects on the P availability in the river. Distinguished characteristics of P bioavailability appeared at major tributaries of Sprain Brook and Troublesome Brook, boundary between fresh and saline water at East Tremont Ave, and estuary close to Hunts Point Wastewater Treatment Plant. Incidental sewer overflows at Yonkers, oil spill at East Tremont Avenue Bridge, fertilizer application at Westchester’s lawns, and gardens, animal manure from the zoo, combined sewer overflows (CSOs), storm water runoff from Bronx River Parkway, and inputs from East River influenced spatial and temporal variations on P transport in the river. This study provides an overview of impacts of land use on nutrient transport in a river system, which may help to make effective policies to regulate P application in the river watersheds, in turn, improve water quality and ecological restoration of a river.

Geomorphic adjustment to hydrologic modifications along a meandering river: Implications for surface flooding on a floodplain

NASA Astrophysics Data System (ADS)

Edwards, Brandon L.; Keim, Richard F.; Johnson, Erin L.; Hupp, Cliff R.; Marre, Saraline; King, Sammy L.

2016-09-01

Responses of large regulated rivers to contemporary changes in base level are not well understood. We used field measurements and historical analysis of air photos and topographic maps to identify geomorphic trends of the lower White River, Arkansas, USA, in the 70 years following base-level lowering at its confluence with the Mississippi River and concurrent with flood control by dams. Incision was identified below a knickpoint area upstream of St. Charles, AR, and increases over the lowermost 90 km of the study site to 2 m near the confluence with the Mississippi River. Mean bankfull width increased by 30 m (21%) from 1930 to 2010. Bank widening appears to be the result of flow regulation above the incision knickpoint and concomitant with incision below the knickpoint. Hydraulic modeling indicated that geomorphic adjustments likely reduced flooding by 58% during frequent floods in the incised, lowermost floodplain affected by backwater flooding from the Mississippi River and by 22% above the knickpoint area. Dominance of backwater flooding in the incised reach indicates that incision is more important than flood control on the lower White River in altering flooding and also suggests that the Mississippi River may be the dominant control in shaping the lower floodplain. Overall, results highlight the complex geomorphic adjustment in large river-floodplain systems in response to anthropogenic modifications and their implications, including reduced river-floodplain connectivity.

Environmental impact assessments of the Xiaolangdi Reservoir on the most hyperconcentrated laden river, Yellow River, China.

PubMed

Kong, Dongxian; Miao, Chiyuan; Wu, Jingwen; Borthwick, Alistair G L; Duan, Qingyun; Zhang, Xiaoming

2017-02-01

The Yellow River is the most hyperconcentrated sediment-laden river in the world. Throughout recorded history, the Lower Yellow River (LYR) experienced many catastrophic flood and drought events. To regulate the LYR, a reservoir was constructed at Xiaolangdi that became operational in the early 2000s. An annual water-sediment regulation scheme (WSRS) was then implemented, aimed at flood control, sediment reduction, regulated water supply, and power generation. This study examines the eco-environmental and socioenvironmental impacts of Xiaolangdi Reservoir. In retrospect, it is found that the reservoir construction phase incurred huge financial cost and required large-scale human resettlement. Subsequent reservoir operations affected the local geological environment, downstream riverbed erosion, evolution of the Yellow River delta, water quality, and aquatic biodiversity. Lessons from the impact assessment of the Xiaolangdi Reservoir are summarized as follows: (1) The construction of large reservoirs is not merely an engineering challenge but must also be viewed in terms of resource exploitation, environmental protection, and social development; (2) long-term systems for monitoring large reservoirs should be established, and decision makers involved at national policy and planning levels must be prepared to react quickly to the changing impact of large reservoirs; and (3) the key to solving sedimentation in the LYR is not Xiaolangdi Reservoir but instead soil conservation in the middle reaches of the Yellow River basin. Proper assessment of the impacts of large reservoirs will help promote development strategies that enhance the long-term sustainability of dam projects.

78 FR 57063 - Special Local Regulations; Jacksonville Dragon Boat Festival; St. Johns River; Jacksonville, FL

Federal Register 2010, 2011, 2012, 2013, 2014

2013-09-17

... 1625-AA08 Special Local Regulations; Jacksonville Dragon Boat Festival; St. Johns River; Jacksonville... Special Local Regulation on the waters of the St. Johns River in Jacksonville, Florida during the... portion of the St. Johns River. Non-participant persons and vessels will be prohibited from entering or...

76 FR 11679 - Drawbridge Operation Regulation; Shark River (South Channel), Belmar, NJ

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-03

... Operation Regulation; Shark River (South Channel), Belmar, NJ AGENCY: Coast Guard, DHS. ACTION: Notice of... temporary deviation from the regulations governing the operation of the S71 Bridge across Shark River (South... Bridge, a bascule lift drawbridge, across Shark River (South Channel), at mile 0.8, in Belmar, NJ, has a...

76 FR 11960 - Drawbridge Operation Regulation; Cape Fear River, Wilmington, NC

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-04

... Operation Regulation; Cape Fear River, Wilmington, NC AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... deviation from the regulation governing the operation of the Cape Fear River Memorial Bridge, across the Cape Fear River, mile 26.8, at Wilmington, NC. The deviation restricts the operation of the draw span...

75 FR 44916 - Drawbridge Operation Regulation; Cape Fear River, Wilmington, NC

Federal Register 2010, 2011, 2012, 2013, 2014

2010-07-30

... Operation Regulation; Cape Fear River, Wilmington, NC AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... deviation from the regulation governing the operation of the Cape Fear River Memorial Bridge, across the Cape Fear River, mile 26.8, at Wilmington, NC. The deviation restricts the operation of the draw span...

Isolating causal pathways between flow and fish in the regulated river hierarchy

Treesearch

Ryan McManamay; Donald J. Orth; Charles A. Dolloff; David C. Mathews

2015-01-01

Unregulated river systems are organized in a hierarchy in which large scale factors (i.e. landscape and segment scales) influence local habitats (i.e. reach, meso- and microhabitat scales), and both differentially exert selective pressures on biota. Dams, however, create discontinua in these processes and change the hierarchical structure. We examined the relative...

76 FR 52563 - Special Local Regulations; Sabine River, Orange, TX

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-23

...-AA08 Special Local Regulations; Sabine River, Orange, TX AGENCY: Coast Guard, DHS. ACTION: Temporary Final rule. SUMMARY: The Coast Guard is establishing a temporary Special Local Regulation on the Sabine River within the Port Arthur, TX Captain of the Port Zone. This Special Local Regulation is intended to...

75 FR 55968 - Special Local Regulations, Sabine River; Orange, TX

Federal Register 2010, 2011, 2012, 2013, 2014

2010-09-15

...-AA08 Special Local Regulations, Sabine River; Orange, TX AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The Coast Guard is establishing a temporary Special Local Regulation in the Port Arthur Captain of the Port Zone on the Sabine River, Orange, Texas. This Special Local Regulation is...

76 FR 63839 - Drawbridge Operation Regulations; Neuse River, New Bern, NC

Federal Register 2010, 2011, 2012, 2013, 2014

2011-10-14

... Operation Regulations; Neuse River, New Bern, NC AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, Fifth Coast Guard District, has issued a temporary deviation from the regulations governing the operation of the Neuse River Railroad Bridge, at mile 33.7...

76 FR 69632 - Drawbridge Operation Regulation; Neuse River, New Bern, NC

Federal Register 2010, 2011, 2012, 2013, 2014

2011-11-09

... Operation Regulation; Neuse River, New Bern, NC AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, Fifth Coast Guard District, has issued a temporary deviation from the regulations governing the operation of the Neuse River Railroad Bridge across the Neuse...

78 FR 16411 - Drawbridge Operation Regulations; Saugatuck River, Westport, CT

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-15

... Regulations; Saugatuck River, Westport, CT AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulation. SUMMARY: The United States Coast Guard has issued a temporary deviation from the regulation governing the operation of the Route 136 Bridge across the Saugatuck River, mile 1.3, at Westport...

Flow and habitat effects on juvenile fish abundance in natural and altered flow regimes

USGS Publications Warehouse

Freeman, Mary C.; Bowen, Z.H.; Bovee, K.D.; Irwin, E.R.

2001-01-01

Conserving biological resources native to large river systems increasingly depends on how flow-regulated segments of these rivers are managed. Improving management will require a better understanding of linkages between river biota and temporal variability of flow and instream habitat. However, few studies have quantified responses of native fish populations to multiyear (>2 yr) patterns of hydrologic or habitat variability in flow-regulated systems. To provide these data, we quantified young-of-year (YOY) fish abundance during four years in relation to hydrologic and habitat variability in two segments of the Tallapoosa River in the southeastern United States. One segment had an unregulated flow regime, whereas the other was flow-regulated by a peak-load generating hydropower dam. We sampled fishes annually and explored how continuously recorded flow data and physical habitat simulation models (PHABSIM) for spring (April-June) and summer (July-August) preceding each sample explained fish abundances. Patterns of YOY abundance in relation to habitat availability (median area) and habitat persistence (longest period with habitat area continuously above the long-term median area) differed between unregulated and flow-regulated sites. At the unregulated site, YOY abundances were most frequently correlated with availability of shallow-slow habitat in summer (10 species) and persistence of shallow-slow and shallow-fast habitat in spring (nine species). Additionally, abundances were negatively correlated with 1-h maximum flow in summer (five species). At the flow-regulated site, YOY abundances were more frequently correlated with persistence of shallow-water habitats (four species in spring; six species in summer) than with habitat availability or magnitude of flow extremes. The associations of YOY with habitat persistence at the flow-regulated site corresponded to the effects of flow regulation on habitat patterns. Flow regulation reduced median flows during spring and summer, which resulted in median availability of shallow-water habitats comparable to the unregulated site. However, habitat persistence was severely reduced by flow fluctuations resulting from pulsed water releases for peak-load power generation. Habitat persistence, comparable to levels in the unregulated site, only occurred during summer when low rainfall or other factors occasionally curtailed power generation. As a consequence, summer-spawning species numerically dominated the fish assemblage at the flow-regulated site; five of six spring-spawning species occurring at both study sites were significantly less abundant at the flow-regulated site. Persistence of native fishes in flow-regulated systems depends, in part, on the seasonal occurrence of stable habitat conditions that facilitate reproduction and YOY survival.

Isotope studies in large river basins: A new global research focus

NASA Astrophysics Data System (ADS)

Gibson, John J.; Aggarwal, Pradeep; Hogan, James; Kendall, Carol; Martinelli, Luiz A.; Stichler, Willi; Rank, Dieter; Goni, Ibrahim; Choudhry, Manzoor; Gat, Joel; Bhattacharya, Sourendra; Sugimoto, Atsuko; Fekete, Balazs; Pietroniro, Alain; Maurer, Thomas; Panarello, Hector; Stone, David; Seyler, Patrick; Maurice-Bourgoin, Laurence; Herczeg, Andrew

Rivers are an important linkage in the global hydrological cycle, returning about 35%of continental precipitation to the oceans. Rivers are also the most important source of water for human use. Much of the world's population lives along large rivers, relying on them for trade, transportation, industry, agriculture, and domestic water supplies. The resulting pressure has led to the extreme regulation of some river systems, and often a degradation of water quantity and quality For sustainable management of water supply agriculture, flood-drought cycles, and ecosystem and human health, there is a basic need for improving the scientific understanding of water cycling processes in river basins, and the ability to detect and predict impacts of climate change and water resources development.

75 FR 1738 - Drawbridge Operation Regulation; New Haven Harbor, Quinnipiac and Mill Rivers, CT

Federal Register 2010, 2011, 2012, 2013, 2014

2010-01-13

...-AA09 Drawbridge Operation Regulation; New Haven Harbor, Quinnipiac and Mill Rivers, CT AGENCY: Coast... regulation governing the operation of three bridges across the Quinnipiac and Mill Rivers at New Haven... and 15 feet at mean low water. The Chapel Street Bridge at mile 0.4, across the Mill River has a...

78 FR 38577 - Special Local Regulations; Red Bull Flugtag National Harbor Event, Potomac River; National Harbor...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-06-27

...-AA08 Special Local Regulations; Red Bull Flugtag National Harbor Event, Potomac River; National Harbor... waters of the Potomac River on September 21, 2013. These special local regulations are necessary to... temporarily restrict vessel traffic in a portion of the Potomac River during the event. DATES: This rule is...

76 FR 15214 - Special Local Regulations for Marine Events; Potomac River, Charles County, MD

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-21

...-AA08 Special Local Regulations for Marine Events; Potomac River, Charles County, MD AGENCY: Coast Guard... during the ``Potomac River Sharkfest Swim'' amateur swim, a marine event to be held on the waters of the Potomac River. These special local regulations are necessary to provide for the safety of life on...

33 CFR 165.811 - Atchafalaya River, Berwick Bay, LA-regulated navigation area.

Code of Federal Regulations, 2010 CFR

2010-07-01

... Bridge. (c) When the Morgan City River gauge reads 3.0 feet or above mean sea level, in addition to the... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Atchafalaya River, Berwick Bay... § 165.811 Atchafalaya River, Berwick Bay, LA-regulated navigation area. (a) The following is a regulated...

78 FR 17087 - Special Local Regulation; New River Raft Race, New River; Fort Lauderdale, FL

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-20

...-AA08 Special Local Regulation; New River Raft Race, New River; Fort Lauderdale, FL AGENCY: Coast Guard... Race, on Saturday, March 23, 2013. The special local regulation is necessary to ensure the safety of... contrary to the public interest because immediate action is needed to minimize potential danger to the race...

A Decision Support System For The Real-Time Allocation Of The Water Resource Of The Tarim River Basin, China

NASA Astrophysics Data System (ADS)

Wei, J.; Wang, G.; Liu, R.

2008-12-01

The Tarim River Basin is the longest inland river in China. Due to water scarcity, ecologically-fragile is becoming a significant constraint to sustainable development in this region. To effectively manage the limited water resources for ecological purposes and for conventional water utilization purposes, a real-time water resources allocation Decision Support System (DSS) has been developed. Based on workflows of the water resources regulations and comprehensive analysis of the efficiency and feasibility of water management strategies, the DSS includes information systems that perform data acquisition, management and visualization, and model systems that perform hydrological forecast, water demand prediction, flow routing simulation and water resources optimization of the hydrological and water utilization process. An optimization and process control strategy is employed to dynamically allocate the water resources among the different stakeholders. The competitive targets and constraints are taken into considered by multi-objective optimization and with different priorities. The DSS of the Tarim River Basin has been developed and been successfully utilized to support the water resources management of the Tarim River Basin since 2005.

Butterfly (Papilionoidea and Hesperioidea) assemblages associated with natural, exotic, and restored riparian habitats along the lower Colorado River, USA

USGS Publications Warehouse

Nelson, S.M.; Andersen, D.C.

1999-01-01

Butterfly assemblages were used to compare revegetated and natural riparian areas along the lower Colorado River. Species richness and correspondence analyses of assemblages showed that revegetated sites had fewer biological elements than more natural sites along the Bill Williams River. Data suggest that revegetated sites do not provide resources needed by some members of the butterfly assemblage, especially those species historically associated with the cottonwood/willow ecosystem. Revegetated sites generally lacked nectar resources, larval host plants, and closed canopies. The riparian system along the regulated river segment that contains these small revegetated sites also appears to have diminished habitat heterogeneity and uncoupled riparian corridors.Revegetated sites were static environments without the successional stages caused by flooding disturbance found in more natural systems. We hypothesize that revegetation coupled with a more natural hydrology is important for restoration of butterfly assemblages along the lower Colorado River. 

77 FR 75917 - Drawbridge Operation Regulation; New Haven Harbor, Quinnipiac and Mill Rivers, CT

Federal Register 2010, 2011, 2012, 2013, 2014

2012-12-26

...-AA09 Drawbridge Operation Regulation; New Haven Harbor, Quinnipiac and Mill Rivers, CT AGENCY: Coast..., mile 1.3, across the Quinnipiac River, and the Chapel Street Bridge, mile 0.4, across the Mill River..., across the Quinnipiac River, and the Chapel Street Bridge, mile 0.4, across the Mill River, to reduce the...

76 FR 69632 - Drawbridge Operation Regulation; Calcasieu River, Westlake, LA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-11-09

... deviation from the regulation governing the operation of the Union Pacific Railroad swing bridge across the... the electrical and mechanical systems of the bridge. This deviation allows the bridge to remain closed..., Docket Operations, telephone (202) 366-9826. SUPPLEMENTARY INFORMATION: The Union Pacific Railroad has...

Scaling properties reveal regulation of river flows in the Amazon through a forest reservoir

NASA Astrophysics Data System (ADS)

Salazar, Juan Fernando; Villegas, Juan Camilo; María Rendón, Angela; Rodríguez, Estiven; Hoyos, Isabel; Mercado-Bettín, Daniel; Poveda, Germán

2018-03-01

Many natural and social phenomena depend on river flow regimes that are being altered by global change. Understanding the mechanisms behind such alterations is crucial for predicting river flow regimes in a changing environment. Here we introduce a novel physical interpretation of the scaling properties of river flows and show that it leads to a parsimonious characterization of the flow regime of any river basin. This allows river basins to be classified as regulated or unregulated, and to identify a critical threshold between these states. We applied this framework to the Amazon river basin and found both states among its main tributaries. Then we introduce the forest reservoir hypothesis to describe the natural capacity of river basins to regulate river flows through land-atmosphere interactions (mainly precipitation recycling) that depend strongly on the presence of forests. A critical implication is that forest loss can force the Amazonian river basins from regulated to unregulated states. Our results provide theoretical and applied foundations for predicting hydrological impacts of global change, including the detection of early-warning signals for critical transitions in river basins.

75 FR 39448 - Special Local Regulation; Detroit APBA Gold Cup, Detroit River, Detroit, MI

Federal Register 2010, 2011, 2012, 2013, 2014

2010-07-09

...-AA08 Special Local Regulation; Detroit APBA Gold Cup, Detroit River, Detroit, MI AGENCY: Coast Guard... APBA Gold Cup. This special local regulation is necessary to protect spectators and vessels from the... Regulation; Detroit APBA Gold Cup, Detroit River, Detroit, MI in the Federal Register (75 FR 21191). We...

An overview of historical channel adjustment and selected hydraulic values in the Lower Sabine and Lower Brazos River Basins, Texas and Louisiana

USGS Publications Warehouse

Heitmuller, Franklin T.; Greene, Lauren E.; John D. Gordon, John D.

2010-01-01

The Sabine and Brazos are alluvial rivers; alluvial rivers are dynamic systems that adjust their geometry in response to changes in streamflow (discharge) and sediment load. In fluvial geomorphology, the term 'channel adjustment' refers to river channel changes in three geometric dimensions: (1) channel slope (profile); (2) the outline or shape, such as meandering or braided, projected on a horizontal plane (planform); and (3) cross-sectional form (shape). The primary objective of the study was to investigate how the channel morphology of these rivers has changed in response to reservoirs and other anthropogenic disturbances that have altered streamflow and sediment load. The results of this study are expected to aid ecological assessments in the lower Sabine River and lower Brazos River Basins for the Texas Instream Flow Program. Starting in the 1920s, several dams have been constructed on the Sabine and Brazos Rivers and their tributaries, and numerous bridges have been built and sometimes replaced multiple times, which have changed the natural flow regime and reduced or altered sediment loads downstream. Changes in channel geometry over time can reduce channel conveyance and thus streamflow, which can have adverse ecological effects. Channel attributes including cross-section form, channel slope, and planform change were evaluated to learn how each river's morphology changed over many years in response to natural and anthropogenic disturbances. Climate has large influence on the hydrologic regimes of the lower Sabine and lower Brazos River Basins. Equally important as climate in controlling the hydrologic regime of the two river systems are numerous reservoirs that regulate downstream flow releases. The hydrologic regimes of the two rivers and their tributaries reflect the combined influences of climate, flow regulation, and drainage area. Historical and contemporary cross-sectional channel geometries at 15 streamflow-gaging stations in the lower Sabine and lower Brazos River Basins were evaluated. An in-depth discussion of results from streamflow-gaging station 08028500 Sabine River near Bon Weir, Tex., is featured here as an example of the analyses that were done at each station.

75 FR 8486 - Regulated Navigation Area; Hudson River south of the Troy Locks, New York

Federal Register 2010, 2011, 2012, 2013, 2014

2010-02-25

...-AA11 Regulated Navigation Area; Hudson River south of the Troy Locks, New York AGENCY: Coast Guard, DHS... area on the navigable waters of the Hudson River south of the Troy Locks. This regulated navigation... Hudson River south of the Troy locks when ice conditions are 8 inches or greater unless authorized by the...

77 FR 47522 - Special Local Regulation; Port Huron Offshore Gran Prix, St. Clair River; Port Huron, MI

Federal Register 2010, 2011, 2012, 2013, 2014

2012-08-09

...-AA08 Special Local Regulation; Port Huron Offshore Gran Prix, St. Clair River; Port Huron, MI AGENCY... regulation on the St. Clair River, Port Huron, Michigan. This action is necessary and intended to ensure... movement of, vessels in a portion of the St. Clair River. During the enforcement period, no person or...

77 FR 39393 - Special Local Regulation; Upper Mississippi River, Mile 842.0 to 840.0

Federal Register 2010, 2011, 2012, 2013, 2014

2012-07-03

... the swim leg of the Optum Health Twin Cities Triathlon occurring on the Upper Mississippi River. Entry... 1625-AA00 Special Local Regulation; Upper Mississippi River, Mile 842.0 to 840.0 AGENCY: Coast Guard... regulation for all waters of the Upper Mississippi River, Mile 842.0 to 840.0, extending the entire width of...

Plant diversity in riparian forests in northwest Colorado: Effects of time and river regulation

Treesearch

Amanda L. Uowolo; Dan Binkley; E. Carol Adair

2005-01-01

During the 20th Century the flow of most rivers in the United States was regulated by diversions and dams, with major impacts on riparian forests. Few unregulated rivers remain to provide baseline information for assessing these impacts. We characterized patterns in riparian plant communities along chronosequences on the unregulated Yampa River and the regulated Green...

75 FR 54770 - Drawbridge Operation Regulations; Cape Fear River and Northeast Cape Fear River, in Wilmington, NC

Federal Register 2010, 2011, 2012, 2013, 2014

2010-09-09

... Regulations; Cape Fear River and Northeast Cape Fear River, in Wilmington, NC AGENCY: Coast Guard, DHS. ACTION..., mile 26.8, and the Isabel S. Holmes Bridge, across Northeast Cape Fear River, mile 1.0, both in... Isabel S. Holmes Bridge, across Northeast Cape Fear River, mile 1.0, a bascule lift bridge, has a...

76 FR 39298 - Drawbridge Operation Regulation; Cape Fear River, and Northeast Cape Fear River, in Wilmington, NC

Federal Register 2010, 2011, 2012, 2013, 2014

2011-07-06

... Operation Regulation; Cape Fear River, and Northeast Cape Fear River, in Wilmington, NC AGENCY: Coast Guard... Northeast Cape Fear River, at mile 1.0, both in Wilmington, NC. The deviation restricts the operation of the... across Northeast Cape Fear River, at mile 1.0, both in Wilmington, NC, requested a temporary deviation...

Historical Maps Potential on the Assessment of the Hydromorphological Changes in Large Rivers: Towards Sustainable Rivers Management under Altered Flows

NASA Astrophysics Data System (ADS)

Kuriqi, Alban; Rosário Fernandes, M.; Santos, Artur; Ferreira, M. Teresa

2017-04-01

Hydromorphological patterns changes in large rivers, result from a long history of human interventions. In this study, we evaluate the causes and effects of hydromorphological alterations in the Iberian Minho River using a planform change analysis. We performed a temporal comparison using historical maps (nineteen century) and contemporaneous maps. The studied river was divided in 2.5 km long river stretches in a total of 25 sampling units. The historical maps were initially georeferenced for the WGS84 coordinate system. We used Geographic Information System (GIS) to extract the hydromorphological features and to store and organised the spatial data. The hydromorphological features (sinuosity index, braiding intensity, river corridor and active channel width, lotic and lentic habitats) were mapped by visual interpretation of the historical and the contemporaneous maps on a scale 1:2500 by applying the same methodology. Also, we analysed certain Indicators of Hydrological Alteration (IHA) based on pre- and post-dam daily streamflow data obtained from the Spanish Water Information System (SIA). The results revealed a significant reduction in the active channel width and all sinuosity indexes representing an overall degradation of river conditions. We also noticed a drastic diminution in the number and total area of lentic habitats causing fish habitat shifts. Changes were less evident in upstream sampling units due to diverse Land Use/Land Cover (LULC) changes combine with some geological constraints. These responses were consistent with reductions in mean annual discharge, flood disturbance decrease and minimum flow increase during the summer season. This work allows to understand the evolutionary trajectory of large fluvial system over more than 100 years and to implement concrete measures for sustainable river management. Keywords: historical maps, large rivers, flow alteration, sinuosity index, lotic and lentic habitats, regulated rivers, river restoration.

78 FR 20849 - Special Local Regulations; Marine Events, Potomac River; National Harbor Access Channel, MD

Federal Register 2010, 2011, 2012, 2013, 2014

2013-04-08

...-AA08 Special Local Regulations; Marine Events, Potomac River; National Harbor Access Channel, MD AGENCY... special local regulations during the ``Swim Across the Potomac'' swimming competition, to be held on the waters of the Potomac River on June 2, 2013. These special local regulations are necessary to provide for...

76 FR 28645 - Drawbridge Operation Regulation; Calcasieu River, Westlake, LA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-05-18

... deviation from the regulation governing the operation of the Union Pacific Railroad swing bridge across the... the electrical and mechanical systems of the bridge. This deviation allows the bridge to remain closed.... SUPPLEMENTARY INFORMATION: The Union Pacific Railroad has requested a temporary deviation from the operating...

78 FR 59237 - Regulated Navigation Area-Weymouth Fore River, Fore River Bridge Construction, Weymouth and...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-09-26

...-AA11 Regulated Navigation Area--Weymouth Fore River, Fore River Bridge Construction, Weymouth and... vicinity of the Fore River Bridge (Mile 3.5) between Weymouth and Quincy, MA. This rule will place temporary speed, wake, and entry restrictions on vessels during bridge replacement operations. This rule is...

78 FR 12260 - Regulated Navigation Area-Weymouth Fore River, Fore River Bridge Construction, Weymouth and...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-22

...-AA11 Regulated Navigation Area--Weymouth Fore River, Fore River Bridge Construction, Weymouth and... under and surrounding the Fore River Bridge (Mile 3.5) between Weymouth and Quincy, MA until December 31... prohibit all vessel traffic through the RNA during bridge replacement operations, both planned and...

33 CFR 100.732 - Annual River Race Augusta; Savannah River, Augusta GA.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Annual River Race Augusta... River Race Augusta; Savannah River, Augusta GA. (a) Definitions: (1) Regulated Area. The regulated area... Race Augusta each day, and during intervals between scheduled events, at the discretion of the Coast...

33 CFR 100.732 - Annual River Race Augusta; Savannah River, Augusta GA.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Annual River Race Augusta... River Race Augusta; Savannah River, Augusta GA. (a) Definitions: (1) Regulated Area. The regulated area... Race Augusta each day, and during intervals between scheduled events, at the discretion of the Coast...

33 CFR 100.732 - Annual River Race Augusta; Savannah River, Augusta GA.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Annual River Race Augusta... River Race Augusta; Savannah River, Augusta GA. (a) Definitions: (1) Regulated Area. The regulated area... Race Augusta each day, and during intervals between scheduled events, at the discretion of the Coast...

33 CFR 100.732 - Annual River Race Augusta; Savannah River, Augusta GA.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Annual River Race Augusta... River Race Augusta; Savannah River, Augusta GA. (a) Definitions: (1) Regulated Area. The regulated area... Race Augusta each day, and during intervals between scheduled events, at the discretion of the Coast...

Human impacts on fluvial systems - A small-catchment case study

NASA Astrophysics Data System (ADS)

Pöppl, Ronald E.; Glade, Thomas; Keiler, Margreth

2010-05-01

Regulations of nearly two-thirds of the rivers worldwide have considerable influences on fluvial systems. In Austria, nearly any river (or) catchment is affected by humans, e.g. due to changing land-use conditions and river engineering structures. Recent studies of human impacts on rivers show that morphologic channel changes play a major role regarding channelization and leveeing, land-use conversions, dams, mining, urbanization and alterations of natural habitats (ecomorphology). Thus 'natural (fluvial) systems' are scarce and humans are almost always inseparably interwoven with them playing a major role in altering them coincidentally. The main objective of this study is to identify human effects (i.e. different land use conditions and river engineering structures) on river bed sediment composition and to delineate its possible implications for limnic habitats. The study area watersheds of the 'Fugnitz' River (~ 140km²) and the 'Kaja' River (~ 20km²) are located in the Eastern part of the Bohemian Massif in Austria (Europe) and drain into the 'Thaya' River which is the border river to the Czech Republic in the north of Lower Austria. Furthermore the 'Thaya' River is eponymous for the local National Park 'Nationalpark Thayatal'. In order to survey river bed sediment composition and river engineering structures facies mapping techniques, i.e. river bed surface mapping and ecomorphological mapping have been applied. Additionally aerial photograph and airborne laserscan interpretation has been used to create land use maps. These maps have been integrated to a numerical DEM-based spatial model in order to get an impression of the variability of sediment input rates to the river system. It is hypothesized that this variability is primarily caused by different land use conditions. Finally river bed sites affected by river engineering structures have been probed and grain size distributions have been analyzed. With these data sedimentological and ecological/ecomorphological effects of various river engineering structures (i.e. dams, weirs, river bank- and river bed protection works) on river bed sediment composition and on limnic habitats are evaluated. First results reveal that 'land use' is a dominant factor concerning river bed sediment composition and limnic habitat conditions. Further outcomes will be presented on European Geosciences Union General Assembly, 2010.

Investigating the Geomorphic and Ecologic Functions of Wood in Relationship to Habitat Type and Salmonid Redds on a Regulated California River

NASA Astrophysics Data System (ADS)

Senter, A. E.; Pasternack, G. B.

2006-12-01

Most river rehabilitation projects incorporate little to no wood in current designs, and those that do have little science to guide them. The overall goal of this research is to investigate the role of wood in a regulated, mid- sized (where river width is greater than most tree heights), Mediterranean-climate (where smaller, softer-wood trees dominate the landscape) river in order to provide a scientific foundation for the potential use of wood in rehabilitation projects within such systems. Wood structures in the active salmonid spawning reach of the Lower Mokelumne River in Central California were measured, mapped, and described during summer and fall 2006. Digital photos and GPS coordinates were used to establish wood location within the stream channel. Structural morphology was determined by measuring physical properties such as individual diameter and length, orientation to stream flow, and jam dimensions. In addition, qualitative attributes were recorded such as decay class and leaf, limb, bark, and root characteristics. A GIS wood layer will be created and added to a database of existing Mokelumne River GIS layers containing salmonid redd (salmon egg nests) densities, hydraulic conditions associated with individual redds, and sub-reach habitat types. An analysis of wood properties, redd locations and conditions, and habitat types will be used to develop a conceptual model of wood dynamics in relation to salmonid habitat on the Lower Mokelumne River. The primary products of this study will be (1) a scientific conceptual model of the role of wood in regulated gravel reaches of mid-size rivers in Mediterranean California and (2) a decision-making framework that will enable river managers to include scientifically based wood structures into rehabilitation designs, thereby enhancing spawning habitat, stream complexity, and biological diversity. These tools will be developed in collaboration with East Bay Municipal Utilities District to aid in the continuing rehabilitation of the Lower Mokelumne River.

Extent and frequency of floods on the Schuylkill River near Phoenixville and Pottstown, Pennsylvania

USGS Publications Warehouse

Busch, William F.; Shaw, Lewis C.

1973-01-01

Knowledge of the frequency and extent of flooding is an important requirement for the design of all works of man bordering or encroaching on flood plains. The proper design of bridges, culverts, dams, highways, levees, reservoirs, sewage-disposal systems, waterworks and all structures on the flood plains of streams requires careful consideration of flood hazards. -1- By use of relations presented in this report, the extent, depth, and frequency of flooding can be estimated for any site along the reach of the Schuylkill River from Oaks to Pottstown. These flood data are presented so that regulatory agencies, organizations, and individuals may have a technical basis for making decisions on the use of flood-prone areas. The Delaware River Basin Commission and the U. S. Geological Survey regard this program of flood-plain-inundation studies as a positive step toward flood-damage prevention. Flood-plaininundation studies are a prerequisite to flood-plain management which may include a mixture of flood-control structures and/or land-use regulations. Both physical works and flood-plain regulations are included in the Comprehensive Plan for development of the Delaware River basin, of which the Schuylkill River is a part. Recommendations for land use, or suggestions for limitations of land use, are not made herein. Other reports on use and regulation of land in flood-prone areas are available (Dola, 1961; White, 1961; American Society of Civil Engineers Task Force on Flood Plain Regulations, 1962; and Goddard, 1963). The primary responsibility for planning for optimum land use in the flood plain and the implementation of flood-plain zoning or other regulations to achieve such optimum use rests with State, and local interests.

Beaver herbivory and its effect on cottonwood trees: Influence of flooding along matched regulated and unregulated rivers

USGS Publications Warehouse

Breck, S.W.; Wilson, K.R.; Andersen, D.C.

2003-01-01

We compared beaver (Castor canadensis) foraging patterns on Fremont cottonwood (Populus deltoides subsp. wislizenii) saplings and the probability of saplings being cut on a 10 km reach of the flow-regulated Green River and a 8.6 km reach of the free-flowing Yampa River in northwestern Colorado. We measured the abundance and density of cottonwood on each reach and followed the fates of individually marked saplings in three patches of cottonwood on the Yampa River and two patches on the Green River. Two natural floods on the Yampa River and one controlled flood on the Green River between May 1998 and November 1999 allowed us to assess the effect of flooding on beaver herbivory. Independent of beaver herbivory, flow regulation on the Green River has caused a decrease in number of cottonwood patches per kilometre of river, area of patches per kilometre, and average stem density within cottonwood patches. The number of saplings cut per beaver colony was three times lower on the Green River than on the Yampa River but the probability of a sapling being cut by a beaver was still higher on the Green River because of lower sapling density there. Controlled flooding appeared to increase the rate of foraging on the Green River by inundating patches of cottonwood, which enhanced access by beaver. Our results suggest regulation can magnify the impact of beaver on cottonwood through interrelated effects on plant spatial distribution and cottonwood density, with the result that beaver herbivory will need to be considered in plans to enhance cottonwood populations along regulated rivers.

Assessment of potential for small hydro/solar power integration in a mountainous, data sparse region: the role of hydrological prediction accuracy

NASA Astrophysics Data System (ADS)

Borga, Marco; Francois, Baptiste; Creutin, Jean-Dominique; Hingray, Benoit; Zoccatelli, Davide; Tardivo, Gianmarco

2015-04-01

In many parts of the world, integration of small hydropower and solar/wind energy sources along river systems is examined as a way to meet pressing renewable energy targets. Depending on the space and time scales considered, hydrometeorological variability may synchronize or desynchronize solar/wind, runoff and the demand opening the possibility to use their complementarity to smooth the intermittency of each individual energy source. Rivers also provide important ecosystem services, including the provision of high quality downstream water supply and the maintenance of in-stream habitats. With future supply and demand of water resources both impacted by environmental change, a good understanding of the potential for the integration among hydropower and solar/wind energy sources in often sparsely gauged catchments is important. In such cases, where complex data-demanding models may be inappropriate, there is a need for simple conceptual modelling approaches that can still capture the main features of runoff generation and artificial regulation processes. In this work we focus on run-of-the-river and solar-power interaction assessment. In order to catch the three key cycles of the load fluctuation - daily, weekly and seasonal, the time step used in the study is the hourly resolution. We examine the performance of a conceptual hydrological model which includes facilities to model dam regulation and diversions and hydrological modules to account for the effect of glaciarised catchments. The model is applied to catchments of the heavily regulated Upper Adige river system (6900 km2), Eastern Italian Alps, which has a long history of hydropower generation. The model is used to characterize and predict the natural flow regime, assess the regulation impacts, and simulate co-fluctuations between run-of- the-river and solar power. The results demonstrates that the simple, conceptual modelling approach developed here can capture the main hydrological and regulation processes well at the three key cycles of the load fluctuations. A specific focus is dedicated on how the results can be communicated to stakeholders in order to provide a basis for discussing the development of new adaptive management strategies.

A framework for human-hydrologic system model development integrating hydrology and water management: application to the Cutzamala water system in Mexico

NASA Astrophysics Data System (ADS)

Wi, S.; Freeman, S.; Brown, C.

2017-12-01

This study presents a general approach to developing computational models of human-hydrologic systems where human modification of hydrologic surface processes are significant or dominant. A river basin system is represented by a network of human-hydrologic response units (HHRUs) identified based on locations where river regulations happen (e.g., reservoir operation and diversions). Natural and human processes in HHRUs are simulated in a holistic framework that integrates component models representing rainfall-runoff, river routing, reservoir operation, flow diversion and water use processes. We illustrate the approach in a case study of the Cutzamala water system (CWS) in Mexico, a complex inter-basin water transfer system supplying the Mexico City Metropolitan Area (MCMA). The human-hydrologic system model for CWS (CUTZSIM) is evaluated in terms of streamflow and reservoir storages measured across the CWS and to water supplied for MCMA. The CUTZSIM improves the representation of hydrology and river-operation interaction and, in so doing, advances evaluation of system-wide water management consequences under altered climatic and demand regimes. The integrated modeling framework enables evaluation and simulation of model errors throughout the river basin, including errors in representation of the human component processes. Heretofore, model error evaluation, predictive error intervals and the resultant improved understanding have been limited to hydrologic processes. The general framework represents an initial step towards fuller understanding and prediction of the many and varied processes that determine the hydrologic fluxes and state variables in real river basins.

75 FR 68974 - Drawbridge Operation Regulation; Upper Mississippi River, Rock Island, IL

Federal Register 2010, 2011, 2012, 2013, 2014

2010-11-10

... Operation Regulation; Upper Mississippi River, Rock Island, IL AGENCY: Coast Guard, DHS. ACTION: Notice of..., has issued a temporary deviation from the regulation governing the operation of the Rock Island Railroad and Highway Drawbridge across the Upper Mississippi River, mile 482.9, at Rock Island, Illinois...

75 FR 17561 - Drawbridge Operation Regulations; Upper Mississippi River, Rock Island, IL

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-07

...] Drawbridge Operation Regulations; Upper Mississippi River, Rock Island, IL AGENCY: Coast Guard, DHS. ACTION... issued a temporary deviation from the regulation governing the operations of the Rock Island Railroad and Highway Drawbridge across the Upper Mississippi River, Mile 482.9, Rock Island, Illinois. The deviation is...

76 FR 9224 - Drawbridge Operation Regulation; Upper Mississippi River, Rock Island, IL

Federal Register 2010, 2011, 2012, 2013, 2014

2011-02-17

...] Drawbridge Operation Regulation; Upper Mississippi River, Rock Island, IL AGENCY: Coast Guard, DHS. ACTION... issued a temporary deviation from the regulation governing the operation of the Rock Island Railroad and Highway Drawbridge across the Upper Mississippi River, mile 482.9, at Rock Island, Illinois. The deviation...

77 FR 3607 - Drawbridge Operation Regulation; Upper Mississippi River, Rock Island, IL

Federal Register 2010, 2011, 2012, 2013, 2014

2012-01-25

...] Drawbridge Operation Regulation; Upper Mississippi River, Rock Island, IL AGENCY: Coast Guard, DHS. ACTION... issued a temporary deviation from the regulation governing the operation of the Rock Island Railroad and Highway Drawbridge across the Upper Mississippi River, mile 482.9, at Rock Island, Illinois. The deviation...

77 FR 20716 - Drawbridge Operation Regulation; Upper Mississippi River, Rock Island, IL

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-06

...] Drawbridge Operation Regulation; Upper Mississippi River, Rock Island, IL AGENCY: Coast Guard, DHS. ACTION... issued a temporary deviation from the regulation governing the operation of the Rock Island Railroad and Highway Drawbridge across the Upper Mississippi River, mile 482.9, at Rock Island, Illinois. The deviation...

75 FR 32661 - Special Local Regulation; Hydroplane Exhibition, Detroit River, Detroit, MI

Federal Register 2010, 2011, 2012, 2013, 2014

2010-06-09

...-AA08 Special Local Regulation; Hydroplane Exhibition, Detroit River, Detroit, MI AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The Coast Guard will enforce a temporary special local regulation on the Detroit River, Detroit, Michigan from June 18, 2010 to June 20, 2010. This special local...

78 FR 23489 - Drawbridge Operation Regulation; Sacramento River, Sacramento, CA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-04-19

... Operation Regulation; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of deviation... operating regulation that governs the Tower Drawbridge across Sacramento River, mile 59.0, at Sacramento, CA. The deviation is necessary to allow the community to participate in the Capital City Classic Run. This...

77 FR 15258 - Special Local Regulations; Patriot Challenge Kayak Race, Ashley River, Charleston, SC

Federal Register 2010, 2011, 2012, 2013, 2014

2012-03-15

...-AA08 Special Local Regulations; Patriot Challenge Kayak Race, Ashley River, Charleston, SC AGENCY... regulations on the Ashley River in Charleston, South Carolina during the Patriot Challenge Kayak Race on... Challenge Kayak Race. Participant paddle boats will include kayaks, canoes, and paddleboards. These special...

Streamflow statistics for unregulated and regulated conditions for selected locations on the Yellowstone, Tongue, and Powder Rivers, Montana, 1928-2002

USGS Publications Warehouse

Chase, Katherine J.

2013-01-01

Major floods in 1996 and 1997 on the Yellowstone River in Montana intensified public debate over the effects of human activities on the Yellowstone River. In 1999, the Yellowstone River Conservation District Council was formed to address conservation issues on the river. The Yellowstone River Conservation District Council partnered with the U.S. Army Corps of Engineers to conduct a cumulative-effects study on the main stem of the Yellowstone River. The cumulative-effects study is intended to provide a basis for future management decisions in the watershed. Streamflow statistics, such as flow-frequency and flow-duration data calculated for unregulated and regulated streamflow conditions, are a necessary component of the cumulative effects study. The U.S. Geological Survey, in cooperation with the Yellowstone River Conservation District Council and the U.S. Army Corps of Engineers, calculated streamflow statistics for unregulated and regulated conditions for the Yellowstone, Tongue, and Powder Rivers for the 1928–2002 study period. Unregulated streamflow represents flow conditions that might have occurred during the 1928–2002 study period if there had been no water-resources development in the Yellowstone River Basin. Regulated streamflow represents estimates of flow conditions during the 1928–2002 study period if the level of water-resources development existing in 2002 was in place during the entire study period. Peak-flow frequency estimates for regulated and unregulated streamflow were developed using methods described in Bulletin 17B. High-flow frequency and low-flow frequency data were developed for regulated and unregulated streamflows from the annual series of highest and lowest (respectively) mean flows for specified n-day consecutive periods within the calendar year. Flow-duration data, and monthly and annual streamflow characteristics, also were calculated for the unregulated and regulated streamflows.

Effects of river regulation on aeolian landscapes, Colorado River, southwestern USA

USGS Publications Warehouse

Draut, Amy E.

2012-01-01

Connectivity between fluvial and aeolian sedimentary systems plays an important role in the physical and biological environment of dryland regions. This study examines the coupling between fluvial sand deposits and aeolian dune fields in bedrock canyons of the arid to semiarid Colorado River corridor, southwestern USA. By quantifying significant differences between aeolian landscapes with and without modern fluvial sediment sources, this work demonstrates for the first time that the flow- and sediment-limiting effects of dam operations affect sedimentary processes and ecosystems in aeolian landscapes above the fluvial high water line. Dune fields decoupled from fluvial sand supply have more ground cover (biologic crust and vegetation) and less aeolian sand transport than do dune fields that remain coupled to modern fluvial sand supply. The proportion of active aeolian sand area also is substantially lower in a heavily regulated river reach (Marble–Grand Canyon, Arizona) than in a much less regulated reach with otherwise similar environmental conditions (Cataract Canyon, Utah). The interconnections shown here among river flow and sediment, aeolian sand transport, and biologic communities in aeolian dunes demonstrate a newly recognized means by which anthropogenic influence alters dryland environments. Because fluvial–aeolian coupling is common globally, it is likely that similar sediment-transport connectivity and interaction with upland ecosystems are important in other dryland regions to a greater degree than has been recognized previously.

76 FR 60732 - Drawbridge Operation Regulations; Navesink (Swimming) River, NJ

Federal Register 2010, 2011, 2012, 2013, 2014

2011-09-30

... Operation Regulations; Navesink (Swimming) River, NJ AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... (Swimming) River between Oceanic and Locust Point, New Jersey. The deviation is necessary to facilitate...: The Oceanic Bridge, across the Navesink (Swimming) River, mile 4.5, between Oceanic and Locust Point...

History of river regulation of the Noce River (NE Italy) and related bio-morphodynamic responses

NASA Astrophysics Data System (ADS)

Serlet, Alyssa; Scorpio, Vittoria; Mastronunzio, Marco; Proto, Matteo; Zen, Simone; Zolezzi, Guido; Bertoldi, Walter; Comiti, Francesco; Prà, Elena Dai; Surian, Nicola; Gurnell, Angela

2016-04-01

The Noce River is a hydropower-regulated Alpine stream in Northern-East Italy and a major tributary of the Adige River, the second longest Italian river. The objective of the research is to investigate the response of the lower course of the Noce to two main stages of hydromorphological regulation; channelization/ diversion and, one century later, hydropower regulation. This research uses a historical reconstruction to link the geomorphic response with natural and human-induced factors by identifying morphological and vegetation features from historical maps and airborne photogrammetry and implementing a quantitative analysis of the river response to channelization and flow / sediment supply regulation related to hydropower development. A descriptive overview is presented. The concept of evolutionary trajectory is integrated with predictions from morphodynamic theories for river bars that allow increased insight to investigate the river response to a complex sequence of regulatory events such as development of bars, islands and riparian vegetation. Until the mid-19th century the river had a multi-thread channel pattern. Thereafter (1852) the river was straightened and diverted. Upstream of Mezzolombardo village the river was constrained between embankments of approximately 100 m width while downstream they are of approximately 50 m width. Since channelization some interesting geomorphic changes have appeared in the river e.g. the appearance of alternate bars in the channel. In 1926 there was a breach in the right bank of the downstream part that resulted in a multi-thread river reach which can be viewed as a recovery to the earlier multi-thread pattern. After the 1950's the flow and sediment supply became strongly regulated by hydropower development. The analysis of aerial images reveals that the multi-thread reach became progressively stabilized by vegetation development over the bars, though signs of some dynamics can still be recognizable today, despite the strong hydropeaking that dominates the flow regime. The results of the historical analysis will be used in a larger framework that focuses on interdisciplinary research of interactions between flow, sediment and vegetation in regulated rivers and aims to enhance knowledge on the interplay between river bars and vegetation in the perspective of providing enhanced tools for river rehabilitation and restoration.

Patterns of nitrogen accumulation and cycling in riparian floodplain ecosystems along the Green and Yampa rivers

USGS Publications Warehouse

Carol E., Adair; Binkley, Dan; Andersen, Douglas C.

2004-01-01

Patterns of nitrogen (N) accumulation and turnover in riparian systems in semi-arid regions are poorly understood, particularly in those ecosystems that lack substantial inputs from nitrogen fixing vegetation. We investigated sources and fluxes of N in chronosequences of riparian forests along the regulated Green River and the free-flowing Yampa River in semi-arid northwestern Colorado. Both rivers lack significant inputs from N-fixing vegetation. Total soil nitrogen increased through time along both rivers, at a rate of about 7.8 g N m−2 year−1 for years 10–70, and 2.7 g N m−2year−1 from years 70–170. We found that the concentration of N in freshly deposited sediments could account for most of the soil N that accumulated in these floodplain soils. Available N (measured by ion exchange resin bags) increased with age along both rivers, more than doubling in 150 years. In contrast to the similar levels of total soil N along these rivers, N turnover rates, annual N mineralization, net nitrification rates, resin-N, and foliar N were all 2–4 times higher along the Green River than the Yampa River. N mineralization and net nitrification rates generally increased through time to steady or slightly declining rates along the Yampa River. Along the Green River, rates of mineralization and nitrification were highest in the youngest age class. The high levels of available N and N turnover in young sites are not characteristic of riparian chronosequences and could be related to changes in hydrology or plant community composition associated with the regulation of the Green River.

78 FR 11747 - Drawbridge Operation Regulations; Chelsea River, Chelsea and East Boston, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-20

... skew and must be adjusted to prevent damage to the operating system. The adjustment maintenance... with 33 CFR 117.35(e), the bridge must return to its regular operating schedule immediately at the end of the designated time period. This deviation from the operating regulations is authorized under 33...

Comparison of historical streamflows to 2013 Streamflows in the Williamson, Sprague, and Wood Rivers, Upper Klamath Lake Basin, Oregon

USGS Publications Warehouse

Hess, Glen W.; Stonewall, Adam J.

2014-01-01

In 2013, the Upper Klamath Lake Basin, Oregon, experienced a dry spring, resulting in an executive order declaring a state of drought emergency in Klamath County. The 2013 drought limited the water supply and led to a near-total cessation of surface-water diversions for irrigation above Upper Klamath Lake once regulation was implemented. These conditions presented a unique opportunity to understand the effects of water right regulation on streamflows. The effects of regulation of diversions were evaluated by comparing measured 2013 streamflow with data from hydrologically similar years. Years with spring streamflow similar to that in 2013 measured at the Sprague River gage at Chiloquin from water years 1973 to 2012 were used to define a Composite Index Year (CIY; with diversions) for comparison to measured 2013 streamflows (no diversions). The best-fit 6 years (1977, 1981, 1990, 1991, 1994, and 2001) were used to determine the CIY. Two streams account for most of the streamflow into Upper Klamath Lake: the Williamson and Wood Rivers. Most streamflow into the lake is from the Williamson River Basin, which includes the Sprague River. Because most of the diversion regulation affecting the streamflow of the Williamson River occurred in the Sprague River Basin, and because of uncertainties about historical flows in a major diversion above the Williamson River gage, streamflow data from the Sprague River were used to estimate the change in streamflow from regulation of diversions for the Williamson River Basin. Changes in streamflow outside of the Sprague River Basin were likely minor relative to total streamflow. The effect of diversion regulation was evaluated using the “Baseflow Method,” which compared 2013 baseflow to baseflow of the CIY. The Baseflow Method reduces the potential effects of summer precipitation events on the calculations. A similar method using streamflow produced similar results, however, despite at least one summer precipitation event. The result of the analysis estimates that streamflow from the Williamson River Basin to Upper Klamath Lake increased by approximately 14,100 acre-feet between July 1 and September 30 relative to prior dry years as a result of regulation of surface-water diversions in 2013. Quantifying the change in streamflow from regulation of diversion for the Wood River Basin was likely less accurate due to a lack of long-term streamflow data. An increase in streamflow from regulation of diversions in the Wood River Basin of roughly 5,500 acre-feet was estimated by comparing the average August and September streamflow in 2013 with historical August and September streamflow. Summing the results of the estimated streamflow gain of the Williamson River Basin (14,100 acre-feet) and Wood River (5,500 acre-feet) gives a total estimated increase in streamflow into Upper Klamath Lake resulting from the July 1–September 2013 regulation of diversions of approximately 19,600 acre-feet.

78 FR 66265 - Drawbridge Operation Regulation; Elizabeth River, Eastern Branch, Norfolk, VA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-11-05

... Operation Regulation; Elizabeth River, Eastern Branch, Norfolk, VA AGENCY: Coast Guard, DHS. ACTION: Notice... Elizabeth River Eastern Branch, mile 1.1, at Norfolk, VA. This deviation is necessary to facilitate... maintenance. The Norfolk Southern 5 railroad Bridge, at mile 1.1, across the Elizabeth River (Eastern Branch...

76 FR 35978 - Drawbridge Operation Regulations; Connecticut River, Old Lyme, CT

Federal Register 2010, 2011, 2012, 2013, 2014

2011-06-21

... Operation Regulations; Connecticut River, Old Lyme, CT AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... Connecticut River at Old Lyme, Connecticut. The deviation is necessary to facilitate scheduled maintenance at... the Connecticut River at mile 3.4, at Old Lyme, Connecticut, has a vertical clearance in the closed...

77 FR 25591 - Drawbridge Operation Regulation; St. Croix River, Stillwater, MN

Federal Register 2010, 2011, 2012, 2013, 2014

2012-05-01

...] Drawbridge Operation Regulation; St. Croix River, Stillwater, MN AGENCY: Coast Guard, DHS. ACTION: Notice of... operating schedule that governs the Stillwater Highway Drawbridge across the St. Croix River, mile 23.4, at... Transportation requested a temporary deviation for the Stillwater Highway Drawbridge, across the St. Croix River...

78 FR 15878 - Drawbridge Operation Regulations; Sacramento River, Sacramento, CA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-13

... Operation Regulations; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of... operating schedule that governs the Tower Drawbridge across Sacramento River, mile 59.0, at Sacramento, CA... temporary change to the operation of the Tower Drawbridge, mile 59.0, over Sacramento River, at Sacramento...

77 FR 19534 - Special Local Regulations; Savannah Tall Ships Challenge, Savannah River, Savannah, GA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-02

...-AA08 Special Local Regulations; Savannah Tall Ships Challenge, Savannah River, Savannah, GA AGENCY... regulations on the Savannah River in Savannah, Georgia during the Savannah Tall Ships Challenge. The Savannah Tall Ships Challenge will take place from Thursday, May 3, 2012 through Monday, May 7, 2012...

76 FR 4819 - Drawbridge Operation Regulations; Passaic River, Jersey City, NJ

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-27

... Operation Regulations; Passaic River, Jersey City, NJ AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... deviation from the regulation governing the operation of the Route 1 & 9 Bridge across the Passaic River, mile 1.8, at Jersey City, New Jersey. The deviation is necessary for bridge painting. This deviation...

78 FR 59230 - Special Local Regulations; Annual Marine Events on the Colorado River, Between Davis Dam...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-09-26

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 100 [Docket No. USCG-2013-0644] Special Local Regulations; Annual Marine Events on the Colorado River, Between Davis Dam (Bullhead City, Arizona... INFORMATION: The Coast Guard will enforce the special local regulations on the Colorado River for the...

77 FR 12475 - Drawbridge Operation Regulations; Cape Fear River, Wilmington, NC

Federal Register 2010, 2011, 2012, 2013, 2014

2012-03-01

... Operation Regulations; Cape Fear River, Wilmington, NC AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... deviation from the regulations governing the operation of the Cape Fear Memorial Bridge, across the Cape Fear River, mile 26.8, at Wilmington, NC. The deviation restricts the operation of the draw span to...

76 FR 53342 - Drawbridge Operation Regulations; Cape Fear River, Wilmington, NC

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-26

... Operation Regulations; Cape Fear River, Wilmington, NC AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... deviation from the regulations governing the operation of the Cape Fear Memorial Bridge, at mile 26.8, over Cape Fear River, at Wilmington, NC. The deviation restricts the operation of the draw span to...

75 FR 30299 - Drawbridge Operation Regulations; Fox River, Green Bay, WI

Federal Register 2010, 2011, 2012, 2013, 2014

2010-06-01

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2010-0374] Drawbridge Operation Regulations; Fox River, Green Bay, WI AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... from the regulation governing the operation of the Main Street Bridge at Mile 1.21 over the Fox River...

Beaver herbivory of willow under two flow regimes: A comparative study on the Green and Yampa rivers

USGS Publications Warehouse

Breck, Stewart W.; Wilson, Kenneth R.; Andersen, Douglas C.

2003-01-01

The effect of flow regulation on plant-herbivore ecology has received very little attention, despite the fact that flow regulation can alter both plant and animal abundance and environmental factors that mediate interactions between them. To determine how regulated flows have impacted beaver (Castor canadensis) and sandbar willow (Salix exigua) ecology, we first quantified the abundance and mapped the spatial distribution of sandbar willow on alluvial sections of the flow-regulated Green River and free-flowing Yampa River in northwestern Colorado. We then established 16 and 15 plots (1 m × 2.7 m) in patches of willow on the Green and Yampa Rivers, respectively, to determine whether rates of beaver herbivory of willow differed between rivers (Green versus Yampa River), seasons (fall-winter versus spring-summer), and years (spring 1998-spring 1999 versus spring 1999-spring 2000). Areal extent of willow was similar on each river, but Green River willow patches were smaller and more numerous. Beavers cut more stems during fall and winter than spring and summer and cut over 6 times more stems (percentage basis) on the Green River than on the Yampa River. We attribute the between-river difference in herbivory to higher availability of willow, greater beaver density, and lower availability of young Fremont cottonwood (Populus deltoides subsp. wislizenii; an alternative food source) on the Green River. Flow regulation increased willow availability to beaver by promoting the formation of island patches that are continuously adjacent to water and feature a perimeter with a relatively high proportion of willow interfacing with water.

Insights from Modeling the Integrated Climate, Biogeochemical Cycles, Human Activities and Their Interactions in the ACME Earth System Model

NASA Astrophysics Data System (ADS)

Leung, L. R.; Thornton, P. E.; Riley, W. J.; Calvin, K. V.

2017-12-01

Towards the goal of understanding the contributions from natural and managed systems to current and future greenhouse gas fluxes and carbon-climate and carbon-CO2 feedbacks, efforts have been underway to improve representations of the terrestrial, river, and human components of the ACME earth system model. Broadly, our efforts include implementation and comparison of approaches to represent the nutrient cycles and nutrient limitations on ecosystem production, extending the river transport model to represent sediment and riverine biogeochemistry, and coupling of human systems such as irrigation, reservoir operations, and energy and land use with the ACME land and river components. Numerical experiments have been designed to understand how terrestrial carbon, nitrogen, and phosphorus cycles regulate climate system feedbacks and the sensitivity of the feedbacks to different model treatments, examine key processes governing sediment and biogeochemistry in the rivers and their role in the carbon cycle, and exploring the impacts of human systems in perturbing the hydrological and carbon cycles and their interactions. This presentation will briefly introduce the ACME modeling approaches and discuss preliminary results and insights from numerical experiments that lay the foundation for improving understanding of the integrated climate-biogeochemistry-human system.

Regulation of snow-fed rivers affects flow regimes more than climate change.

PubMed

Arheimer, B; Donnelly, C; Lindström, G

2017-07-05

River flow is mainly controlled by climate, physiography and regulations, but their relative importance over large landmasses is poorly understood. Here we show from computational modelling that hydropower regulation is a key driver of flow regime change in snow-dominated regions and is more important than future climate changes. This implies that climate adaptation needs to include regulation schemes. The natural river regime in snowy regions has low flow when snow is stored and a pronounced peak flow when snow is melting. Global warming and hydropower regulation change this temporal pattern similarly, causing less difference in river flow between seasons. We conclude that in snow-fed rivers globally, the future climate change impact on flow regime is minor compared to regulation downstream of large reservoirs, and of similar magnitude over large landmasses. Our study not only highlights the impact of hydropower production but also that river regulation could be turned into a measure for climate adaptation to maintain biodiversity on floodplains under climate change.Global warming and hydropower regulations are major threats to future fresh-water availability and biodiversity. Here, the authors show that their impact on flow regime over a large landmass result in similar changes, but hydropower is more critical locally and may have potential for climate adaptation in floodplains.

Regional variations of organophosphorus flame retardants - Fingerprint of large river basin estuaries/deltas in Europe compared with China.

PubMed

Wolschke, Hendrik; Sühring, Roxana; Massei, Riccardo; Tang, Jianhui; Ebinghaus, Ralf

2018-05-01

This study reports the occurrence and distribution of organophosphorus flame retardants and plasticizer (OPEs) in sediments of eight large river basin estuaries and deltas across Europe. A robust and sensitive OPE analysis method was developed through the application of an in-cell clean-up in an accelerated solvent extraction and the use of an GC-MSMS System for instrumental analyses. OPEs were detected in all sediment samples with sum concentrations of up to 181 ng g -1 dw. A fingerprinting method was used to identify river specific pattern to compare river systems. The estuaries and deltas were chosen to have a conglomerate print of the whole river. The results are showing very similar OPE patterns across Europe with minor differences driven by local industrial input. The European estuary concentrations and patterns were compared with OPEs detected in the Xiaoquing River in China, as an example for a region with other production, usage and legislative regulations. The Chinese fingerprint differed significant from the overall European pattern. Copyright © 2018 Elsevier Ltd. All rights reserved.

Effect of mine discharge on the pattern of riverine habitat use of elephants Elephas maximus and other mammals in Singhbhum forests, Bihar, India

DOE Office of Scientific and Technical Information (OSTI.GOV)

Singh, R.K.; Chowdhury, S.

The aim of this paper is to access the influence of water quality both on the occurrence of, and utilization by, elephants (Elephas maximus) in a riverine habitat. Mining operations and other anthropogenic changes to natural river systems have caused degradation of the ecosystem for elephants. A decline in their numbers has been seen throughout the Singhbhum Forests, India due to fragmentation and loss of habitat. The need to preserve and restore the habitat of the elephant is accepted, but until the factors that influence their distribution are known and understood, suitable management plans cannot be implemented. The study areamore » was the catchment of the river Koina where waste discharge from an iron oremine and processing plant impact upon water quality. The study period from April 1995 to March 1996 looked at sections of the river where unregulated mine discharge was made, and where regulation through tailing ponds controlled total suspended solids (TSS) output from the mine waste water to the river system. Various physico-chemical parameters recorded at seven sampling stations were quantified. Principal Component Analysis (PCA) segregated the key parameters in determining the discharge levels of both regulated and unregulated discharge at various sites.« less

Mapping the impact of river regulation on carbon dynamics using coupled field surveys and remotely-sensed optical properties

NASA Astrophysics Data System (ADS)

Kuhn, C.; Butman, D. E.

2016-12-01

Many river-reservoir networks are already managed for ecological targets such as stream temperature regulation, but less is known about how management choices alter the quantity and composition of dissolved organic carbon as well as the concentration of dissolved carbon gases. Understanding these ecological impacts is critical to informing water resources management, especially in light of the global hydropower boom and the increased interest in dam removal in the United States. Here we present results from a field survey and remote sensing imagery analysis quantifying a suite of water quality variables. With this approach, we evaluate spatial differences in carbon signals above, and below eight mainstem dams located on the Columbia and Snake Rivers. Dissolved methane and carbon dioxide concentrations were in excess of atmospheric levels with occasional carbon dioxide undersaturation being observed in the Snake River. CH4 and CO2 δ13C values shifted between the mainstem and the tributaries reflecting changes in carbon sources and processes. Satellite-retrieved estimates of CDOM and chlorophyll-a were compared to in situ measurements to enable surface mapping of concentrations at broader spatial scales. Our technical approach blends cloud-based data fusion techniques and machine learning to link ground-collected observations to remote sensing imagery in order to produce spatially-explicit, cross-scale estimates of carbon dynamics in a large, highly regulated river system. These findings test the feasibility of coupling remote sensing with field-based measurements to observe the complex impacts of run-of-the river impoundments to aquatic carbon cycling.

78 FR 15292 - Drawbridge Operation Regulations; Upper Mississippi River, Rock Island, IL

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-11

... Operation Regulations; Upper Mississippi River, Rock Island, IL AGENCY: Coast Guard, DHS. ACTION: Notice of... schedule that governs the Rock Island Railroad and Highway Drawbridge, across the Upper Mississippi River, mile 482.9, at Rock Island, Illinois. The deviation is necessary to allow the River Bandits 5K Run/Walk...

75 FR 32351 - Drawbridge Operation Regulation; Taunton River, Fall River and Somerset, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2010-06-08

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2010-0234] RIN 1625-AA09 Drawbridge Operation Regulation; Taunton River, Fall River and Somerset, MA AGENCY: Coast Guard, DHS. ACTION: Notice of proposed rulemaking. SUMMARY: The Coast Guard proposes to change the drawbridge...

78 FR 31457 - Drawbridge Operation Regulation; Taunton River, Fall River and Somerset, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-24

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2013-0291] RIN 1625-AA09 Drawbridge Operation Regulation; Taunton River, Fall River and Somerset, MA AGENCY: Coast Guard, DHS. ACTION: Notice of proposed rulemaking. SUMMARY: The Coast Guard proposes to modify the operating...

77 FR 31724 - Drawbridge Operation Regulation; St. Croix River, Stillwater, MN

Federal Register 2010, 2011, 2012, 2013, 2014

2012-05-30

... Operation Regulation; St. Croix River, Stillwater, MN AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... schedule that governs the Stillwater Highway Drawbridge across the St. Croix River, mile 23.4, at... Drawbridge, across the St. Croix River, mile 23.4, at Stillwater, Minnesota to be closed-to-navigation on...

78 FR 35757 - Drawbridge Operation Regulation; St. Croix River, Stillwater, MN

Federal Register 2010, 2011, 2012, 2013, 2014

2013-06-14

...] Drawbridge Operation Regulation; St. Croix River, Stillwater, MN AGENCY: Coast Guard, DHS. ACTION: Notice of... operating schedule that governs the Stillwater Highway Drawbridge across the St. Croix River, mile 23.4, at... St. Croix River, mile 23.4, at Stillwater, Minnesota to be closed-to-navigation on July 4, 2013 as...

76 FR 5686 - Drawbridge Operation Regulation; Pocomoke River, Pocomoke City, MD

Federal Register 2010, 2011, 2012, 2013, 2014

2011-02-02

... Operation Regulation; Pocomoke River, Pocomoke City, MD AGENCY: Coast Guard, DHS. ACTION: Notice of... River, mile 15.6, at Pocomoke City, MD. The deviation restricts the operation of the draw span to.... The Route 675 Bridge across Pocomoke River, mile 15.6 at Pocomoke City MD, has a vertical clearance in...

78 FR 9587 - Drawbridge Operation Regulation; Cape Fear River, Wilmington, NC

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-11

... Operation Regulation; Cape Fear River, Wilmington, NC AGENCY: Coast Guard, DHS. ACTION: Notice of deviation... operating schedule that governs the operation of the Cape Fear River Memorial Bridge, across the Cape Fear.... The Cape Fear River Memorial Bridge, at mile 26.8, at Wilmington, NC, has vertical clearances in the...

75 FR 76322 - Drawbridge Operation Regulation; Fox River, Oshkosh, WI

Federal Register 2010, 2011, 2012, 2013, 2014

2010-12-08

...-AA09 Drawbridge Operation Regulation; Fox River, Oshkosh, WI AGENCY: Coast Guard, DHS. ACTION: Notice... procedures for the Canadian National Railway Bridge across the Fox River at Mile 55.72 at Oshkosh, Wisconsin... add paragraph (e) to read as follows: Sec. 117.1087 Fox River. * * * * * (e) The draw of the Canadian...

75 FR 16009 - Drawbridge Operation Regulations; Hackensack River, Jersey City, NJ, Maintenance

Federal Register 2010, 2011, 2012, 2013, 2014

2010-03-31

... Regulations; Hackensack River, Jersey City, NJ, Maintenance AGENCY: Coast Guard, DHS. ACTION: Notice of..., mile 1.8, across the Hackensack River at Jersey City, New Jersey. This deviation allows the bridge... across the Hackensack River at mile 1.8, at Jersey City, New Jersey, has a vertical clearance in the...

75 FR 63398 - Drawbridge Operation Regulations; Hackensack River, Jersey City, NJ

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-15

... Operation Regulations; Hackensack River, Jersey City, NJ AGENCY: Coast Guard, DHS. ACTION: Notice of... across the Hackensack River, mile 1.8, at Jersey City, New Jersey. The deviation allows the bridge owner... INFORMATION: The Route 1 & 9 Lincoln Highway Bridge, across the Hackensack River, mile 1.8, at Jersey City...

77 FR 1020 - Regulated Navigation Area; S99 Alford Street Bridge Rehabilitation Project, Mystic River, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-01-09

...-AA11 Regulated Navigation Area; S99 Alford Street Bridge Rehabilitation Project, Mystic River, MA... Mystic River under and surrounding the S99 Alford Street Bridge which crosses the Mystic River between... construction workers by restricting vessel traffic during periods where the bridge is being repaired. DATES...

50 CFR 300.94 - Prohibitions and restrictions.

Code of Federal Regulations, 2010 CFR

2010-10-01

... REGULATIONS Fraser River Sockeye and Pink Salmon Fisheries § 300.94 Prohibitions and restrictions. In addition... sockeye and pink salmon fishing in the Fraser River Panel Area (U.S.): (1) The Fraser River Panel Area (U.S.) is closed to sockeye and pink salmon fishing, unless opened by Fraser River Panel regulations or...

50 CFR 300.94 - Prohibitions and restrictions.

Code of Federal Regulations, 2011 CFR

2011-10-01

... REGULATIONS Fraser River Sockeye and Pink Salmon Fisheries § 300.94 Prohibitions and restrictions. In addition... sockeye and pink salmon fishing in the Fraser River Panel Area (U.S.): (1) The Fraser River Panel Area (U.S.) is closed to sockeye and pink salmon fishing, unless opened by Fraser River Panel regulations or...

Water quality of the Garang River, Semarang, Central Java, Indonesia based on the government regulation standard

NASA Astrophysics Data System (ADS)

Ujianti, R. M. D.; Anggoro, S.; Bambang, A. N.; Purwanti, F.

2018-05-01

The Garang watershed composed by three main river streams has been managed by the Regional water company of the Semarang city, Central Java for drinking water supply. A river is often polluted by domestic waste and industrial effluents. Therefore water quality of the river should be keep to meet the Government regulation standard. The study aims to analyze water quality of the Garang’ river using pollution index based on the government regulation. Series data from 2010 to 2016 were derived from the Environmental and Forestry Office of the Central Java Province and sampling of water quality was taken in August 2017 from the middle of watershed area. Water quality parameters include temperature, pH, TDS, DO, COD, Phosphate, Nitrate, Chromium, Copper, Cadmium and H2S. The research indicates that concentration of Copper has exceeds the standard of the Government Regulation No. 82 Year 2001. The water pollution index is 1.23, its means that the river is lightly polluted. Therefore the river should be managed comprehensively for sustainable uses in order to create one river one management concept.

78 FR 31454 - Drawbridge Operation Regulation; Hudson River, Troy and Green Island, NY

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-24

...-AA09 Drawbridge Operation Regulation; Hudson River, Troy and Green Island, NY AGENCY: Coast Guard, DHS... that governs the highway bridge (Troy Green Island) across the Hudson River, mile 152.7, between Troy... the regulations for the 112th Street Bridge, mile 155.4, between Troy and Cohoes which has been...

77 FR 23599 - Special Local Regulations for Marine Events; Potomac River, Charles County, MD

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-20

...-AA08 Special Local Regulations for Marine Events; Potomac River, Charles County, MD AGENCY: Coast Guard...; telephone 410-576-2674, email Ronald.L[email protected] . If you have questions on viewing the docket, call... ``Special Local Regulations for Marine Events; Potomac River, Charles County, MD'' in the Federal Register...

78 FR 35756 - Drawbridge Operation Regulations; Harlem River, New York City, NY

Federal Register 2010, 2011, 2012, 2013, 2014

2013-06-14

... Regulations; Harlem River, New York City, NY AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation... from the regulation governing the operation of the Willis Avenue Bridge across the Harlem River, mile 1... found at 33 CFR 117.789(b)(2). The bridge owner, New York City Department of Transportation, requested a...

77 FR 19570 - Special Local Regulation for Marine Events, Chesapeake Bay Workboat Race, Back River, Messick...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-02

...-AA08 Special Local Regulation for Marine Events, Chesapeake Bay Workboat Race, Back River, Messick... Guard proposes to establish a special local regulation during the Chesapeake Bay Workboat Race, a series of boat races to be held on the waters of Back River, Poquoson, Virginia on June 24, 2012. This event...

Advancing towards functional environmental flows for temperate floodplain rivers.

PubMed

Hayes, Daniel S; Brändle, Julia M; Seliger, Carina; Zeiringer, Bernhard; Ferreira, Teresa; Schmutz, Stefan

2018-08-15

Abstraction, diversion, and storage of flow alter rivers worldwide. In this context, minimum flow regulations are applied to mitigate adverse impacts and to protect affected river reaches from environmental deterioration. Mostly, however, only selected instream criteria are considered, neglecting the floodplain as an indispensable part of the fluvial ecosystem. Based on essential functions and processes of unimpaired temperate floodplain rivers, we identify fundamental principles to which we must adhere to determine truly ecologically-relevant environmental flows. Literature reveals that the natural flow regime and its seasonal components are primary drivers for functions and processes of abiotic and biotic elements such as morphology, water quality, floodplain, groundwater, riparian vegetation, fish, macroinvertebrates, and amphibians, thus preserving the integrity of floodplain river ecosystems. Based on the relationship between key flow regime elements and associated environmental components within as well as adjacent to the river, we formulate a process-oriented functional floodplain flow (ff-flow) approach which offers a holistic conceptual framework for environmental flow assessment in temperate floodplain river systems. The ff-flow approach underlines the importance of emulating the natural flow regime with its seasonal variability, flow magnitude, frequency, event duration, and rise and fall of the hydrograph. We conclude that the ecological principles presented in the ff-flow approach ensure the protection of floodplain rivers impacted by flow regulation by establishing ecologically relevant environmental flows and guiding flow restoration measures. Copyright © 2018 The Authors. Published by Elsevier B.V. All rights reserved.

77 FR 14968 - Drawbridge Operation Regulation; Anacostia River, Washington, DC

Federal Register 2010, 2011, 2012, 2013, 2014

2012-03-14

... Railroad Vertical Lift Bridge across the Anacostia River, mile 3.4, at Washington, DC. The change will... operation regulation for the CSX Railroad Vertical Lift Bridge, across the Anacostia River, mile 3.4, at...

The Irrigation Effect: How River Regulation Can Promote Some Riparian Vegetation.

PubMed

Gill, Karen M; Goater, Lori A; Braatne, Jeffrey H; Rood, Stewart B

2018-04-01

River regulation impacts riparian ecosystems by altering the hydrogeomorphic conditions that support streamside vegetation. Obligate riparian plants are often negatively impacted since they are ecological specialists with particular instream flow requirements. Conversely, facultative riparian plants are generalists and may be less vulnerable to river regulation, and could benefit from augmented flows that reduce drought stress during hot and dry periods. To consider this 'irrigation effect' we studied the facultative shrub, netleaf hackberry (Celtis reticulata), the predominant riparian plant along the Hells Canyon corridor of the Snake River, Idaho, USA, where dams produce hydropeaking, diurnal flow variation. Inventories of 235 cross-sectional transects revealed that hackberry was uncommon upstream from the reservoirs, sparse along the reservoir with seasonal draw-down and common along two reservoirs with stabilized water levels. Along the Snake River downstream, hackberry occurred in fairly continuous, dense bands along the high water line. In contrast, hackberry was sparsely scattered along the free-flowing Salmon River, where sandbar willow (Salix exigua), an obligate riparian shrub, was abundant. Below the confluence of the Snake and Salmon rivers, the abundance and distribution of hackberry were intermediate between the two upstream reaches. Thus, river regulation apparently benefited hackberry along the Snake River through Hells Canyon, probably due to diurnal pulsing that wets the riparian margin. We predict similar benefits for some other facultative riparian plants along other regulated rivers with hydropeaking during warm and dry intervals. To analyze the ecological impacts of hydropeaking we recommend assessing daily maxima, as well as daily mean river flows.

The Irrigation Effect: How River Regulation Can Promote Some Riparian Vegetation

NASA Astrophysics Data System (ADS)

Gill, Karen M.; Goater, Lori A.; Braatne, Jeffrey H.; Rood, Stewart B.

2018-04-01

River regulation impacts riparian ecosystems by altering the hydrogeomorphic conditions that support streamside vegetation. Obligate riparian plants are often negatively impacted since they are ecological specialists with particular instream flow requirements. Conversely, facultative riparian plants are generalists and may be less vulnerable to river regulation, and could benefit from augmented flows that reduce drought stress during hot and dry periods. To consider this `irrigation effect' we studied the facultative shrub, netleaf hackberry ( Celtis reticulata), the predominant riparian plant along the Hells Canyon corridor of the Snake River, Idaho, USA, where dams produce hydropeaking, diurnal flow variation. Inventories of 235 cross-sectional transects revealed that hackberry was uncommon upstream from the reservoirs, sparse along the reservoir with seasonal draw-down and common along two reservoirs with stabilized water levels. Along the Snake River downstream, hackberry occurred in fairly continuous, dense bands along the high water line. In contrast, hackberry was sparsely scattered along the free-flowing Salmon River, where sandbar willow ( Salix exigua), an obligate riparian shrub, was abundant. Below the confluence of the Snake and Salmon rivers, the abundance and distribution of hackberry were intermediate between the two upstream reaches. Thus, river regulation apparently benefited hackberry along the Snake River through Hells Canyon, probably due to diurnal pulsing that wets the riparian margin. We predict similar benefits for some other facultative riparian plants along other regulated rivers with hydropeaking during warm and dry intervals. To analyze the ecological impacts of hydropeaking we recommend assessing daily maxima, as well as daily mean river flows.

Attributes of an alluvial river and their relation to water policy and management

PubMed Central

Trush, William J.; McBain, Scott M.; Leopold, Luna B.

2000-01-01

Rivers around the world are being regulated by dams to accommodate the needs of a rapidly growing global population. These regulatory efforts usually oppose the natural tendency of rivers to flood, move sediment, and migrate. Although an economic benefit, river regulation has come at unforeseen and unevaluated cumulative ecological costs. Historic and contemporary approaches to remedy environmental losses have largely ignored hydrologic, geomorphic, and biotic processes that form and maintain healthy alluvial river ecosystems. Several commonly known concepts that govern how alluvial channels work have been compiled into a set of “attributes” for alluvial river integrity. These attributes provide a minimum checklist of critical geomorphic and ecological processes derived from field observation and experimentation, a set of hypotheses to chart and evaluate strategies for restoring and preserving alluvial river ecosystems. They can guide how to (i) restore alluvial processes below an existing dam without necessarily resorting to extreme measures such as demolishing one, and (ii) preserve alluvial river integrity below proposed dams. Once altered by dam construction, a regulated alluvial river will never function as before. But a scaled-down morphology could retain much of a river's original integrity if key processes addressed in the attributes are explicitly provided. Although such a restoration strategy is an experiment, it may be the most practical solution for recovering regulated alluvial river ecosystems and the species that inhabit them. Preservation or restoration of the alluvial river attributes is a logical policy direction for river management in the future. PMID:11050220

Adaptive Flow Management in Regulated Rivers: Successes and Challenges (Invited)

NASA Astrophysics Data System (ADS)

Robinson, C. T.; Melis, T. S.; Kennedy, T.; Korman, J.; Ortlepp, J.

2013-12-01

Experimental high flows are becoming common management actions in rivers affected by large dams. When implemented under clear objectives and goals, experimental flows provide opportunities for long-term ecological successes but also impose various ecological challenges as systems shift under environmental change or from human-related actions. We present case studies from long-term adaptive flow management programs on the River Spöl, Switzerland and the Colorado River, USA, both of which are regulated by high dams and flow through National Parks. The management goals in each system differ thus reflecting the different high flow practices implemented over time. Regulated flows in the Spöl reflect a compromise between hydropower needs and ecology (native brown trout fishery), whereas Glen Canyon Dam flows have mainly been directed towards maintenance of river beaches in Grand Canyon National Park with co-management of both nonnative rainbow trout in the tailwater immediately below the dam and downstream endangered native fish of Grand Canyon also an objective. Some 24 experimental floods have occurred on the Spöl over the last 13 years, resulting in a positive effect on the trout fishery and a zoobenthic assemblage having a more typical alpine stream composition. The system has experienced various shifts in assemblage composition over time with the last shift occurring 7 years after the initial floods. A major challenge occurred in spring 2013 with an accidental release of fine sediments from the reservoir behind Punt dal Gall Dam, causing high fish mortality and smothering of the river bottom. Results showed that the effect was pronounced near the dam and gradually lessened downriver to the lower reservoir. Zoobenthic assemblages displayed relatively high resistance to the event and some fish found refugia in the lower reservoir and larger side tributaries, thus projecting a faster recovery than initially thought. Below Glen Canyon dam, benefits to sandbars have been marginal since experimental constrained hydropower releases began in 1991 and controlled floods began in 1996 (7 have been released through 2012), while native fish populations have increased, although apparently not in response to flows. However, nonnative rainbow trout have been shown to increase in abundance repeatedly below Glen Canyon Dam in response to both controlled floods and more stable flows, both of which were originally proposed to benefit Grand Canyon beaches. Survival of trout fry following the 2008 spring flood was apparently tied to increased abundance of benthic invertebrates in the tailwater. Expansion of nonnative trout in response to high flows pose a potential threat to native fish downstream through competition for limited food and habitat, and through predation of juvenile native fish. Challenges are presented for each system in terms of flow implementation under hydropower needs (Spöl) and environmental change (Colorado). We close with perspectives on improving adaptive flow management actions in regulated rivers as learning-based, long-term ecological experiments.

75 FR 18055 - Drawbridge Operation Regulation; Mermentau River, Grand Chenier, LA

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-09

... electrical and mechanical repairs pertaining to the bridge's main span drive assembly and system components... in order to perform electrical and mechanical repairs pertaining to the bridge's main span drive...

18 CFR 1304.209 - Land-based structures/alterations.

Code of Federal Regulations, 2014 CFR

2014-04-01

..., satellite antennas, septic tanks, and septic drainfields shall not be allowed on TVA land. (c) Utility lines... APPROVAL OF CONSTRUCTION IN THE TENNESSEE RIVER SYSTEM AND REGULATION OF STRUCTURES AND OTHER ALTERATIONS...

18 CFR 1304.209 - Land-based structures/alterations.

Code of Federal Regulations, 2013 CFR

2013-04-01

..., satellite antennas, septic tanks, and septic drainfields shall not be allowed on TVA land. (c) Utility lines... APPROVAL OF CONSTRUCTION IN THE TENNESSEE RIVER SYSTEM AND REGULATION OF STRUCTURES AND OTHER ALTERATIONS...

76 FR 52566 - Drawbridge Operation Regulations; Anacostia River, Washington, DC

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-23

... Lift Bridge across the Anacostia River, mile 3.4, at Washington, DC. This deviation will test a change... regulations for the CSX Railroad Vertical Lift Bridge, across the Anacostia River, mile 3.4, at Washington, DC...

Geomorphic status of regulated rivers in the Iberian Peninsula.

PubMed

Lobera, G; Besné, P; Vericat, D; López-Tarazón, J A; Tena, A; Aristi, I; Díez, J R; Ibisate, A; Larrañaga, A; Elosegi, A; Batalla, R J

2015-03-01

River regulation by dams modifies flow regimes, interrupts the transfer of sediment through channel networks, and alters downstream bed dynamics, altogether affecting channel form and processes. So far, most studies on the geomorphic impacts of dams are restricted to single rivers, or even single river stretches. In this paper we analyse the geomorphic status of 74 river sites distributed across four large basins in the Iberian Peninsula (i.e. 47 sites located downstream of dams). For this purpose, we combine field data with hydrological data available from water agencies, and analyse historical (1970) and current aerial photographs. In particular, we have developed a Geomorphic Status (GS) index that allows us to assess the physical structure of a given channel reach and its change through time. The GS encompasses a determination of changes in sedimentary units, sediment availability, bar stability and channel flow capacity. Sites are statistically grouped in four clusters based on contrasted physical and climate characteristics. Results emphasise that regulation changes river's flow regime with a generalized reduction of the magnitude and frequency of floods (thus flow competence). This, in addition to the decrease downstream sediment supply, results in the loss of active bars as they are encroached by vegetation, to the point that only reaches with little or no regulation maintain exposed sedimentary deposits. The GS of regulated river reaches is negatively correlated with magnitude of the impoundment (regulation). Heavily impacted reaches present channel stabilization and, in contrast to the hydrological response, the distance and number of tributaries do not reverse the geomorphic impact of the dams. Stabilization limits river dynamics and may contribute to the environmental degradation of the fluvial ecosystem. Overall, results describe the degree of geomorphological alteration experienced by representative Iberian rivers mostly because of regulation, challenging the successful long-term implementation of river basin management programmes. Copyright © 2014 Elsevier B.V. All rights reserved.

Influence of a water regulation event on the age of Yellow River water in the Bohai

NASA Astrophysics Data System (ADS)

Li, Zhen; Wang, Haiyan; Guo, Xinyu; Liu, Zhe; Gao, Huiwang; Zhang, Guiling

2017-10-01

Abrupt changes in freshwater inputs from large rivers usually imply regime shifts in coastal water environments. The influence of a water regulation event on the age of the Yellow River water in the Bohai was modeled using constituent-oriented age and residence time theory to better understand the change in the environmental function of the hydrodynamic field owing to human activities. The water ages in Laizhou Bay, the central basin, and the Bohai strait are sensitive to water regulation. The surface ages in those areas can decrease by about 300 days, particularly in July, and the age stratification is also strengthened. A water regulation event can result in declines in the water age in early July ahead of declines in the water age under climatological conditions (without the regulation event) by about 1 and 5 months in the central basin and Laizhou Bay, respectively. The change in the coastal circulation due to the water regulation event is the primary reason for the change in the Yellow River water age. The high Yellow River flow rate can enhance the density flow and, therefore, reduce the age of the Yellow River water. The subsequent impact of a single water regulation event can last about 1.0 to 4.0 years in different subregions.

78 FR 9588 - Drawbridge Operation Regulation; Mile 535.0, Upper Mississippi River, Sabula, IA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-11

... Operation Regulation; Mile 535.0, Upper Mississippi River, Sabula, IA AGENCY: Coast Guard, DHS. ACTION... River, mile 535.0, at Sabula, Iowa. The deviation is necessary to allow the bridge owner time to perform... Upper Mississippi River, mile 535.0, at Sabula, Iowa to remain in the closed-to-navigation position...

77 FR 20750 - Special Local Regulations for Marine Events; Potomac River, National Harbor Access Channel, MD

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-06

...-AA08 Special Local Regulations for Marine Events; Potomac River, National Harbor Access Channel, MD...'' triathlon, a marine event to be held on the waters of the Potomac River in Prince George's County, Maryland... portion of the Potomac River and National Harbor Access Channel during the event. DATES: Comments and...

78 FR 18274 - Special Local Regulations; Red Bull Flugtag National Harbor Event, Potomac River; National Harbor...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-26

...-AA08 Special Local Regulations; Red Bull Flugtag National Harbor Event, Potomac River; National Harbor... event,'' to be held on the waters of the Potomac River on September 21, 2013. These special local... representative. This action is intended to temporarily restrict vessel traffic in a portion of the Potomac River...

77 FR 42464 - Special Local Regulations for Marine Events; Potomac River, National Harbor Access Channel, MD

Federal Register 2010, 2011, 2012, 2013, 2014

2012-07-19

...--AA08 Special Local Regulations for Marine Events; Potomac River, National Harbor Access Channel, MD... Harbor'' triathlon, a marine event to be held on the waters of the Potomac River in Prince George's...; Potomac River, National Harbor Access Channel, MD'' in the Federal Register (77 FR 20750). The rulemaking...

78 FR 18277 - Special Local Regulation; Low Country Splash, Wando River, Cooper River, and Charleston Harbor...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-26

...-AA08 Special Local Regulation; Low Country Splash, Wando River, Cooper River, and Charleston Harbor... Harbor in Charleston, SC during the Low Country Splash in Charleston, SC, on June 1, 2013. This special... States during the Low Country Splash. C. Discussion of Proposed Rule On Saturday, June 1, 2013, the Low...

75 FR 38411 - Drawbridge Operation Regulations; Chelsea River, Chelsea and East Boston, MA, Event-Road Race

Federal Register 2010, 2011, 2012, 2013, 2014

2010-07-02

... Operation Regulations; Chelsea River, Chelsea and East Boston, MA, Event--Road Race AGENCY: Coast Guard, DHS... is necessary to facilitate a public event, the Chelsea River Revel 5K Road Race. DATES: This... public event, the Chelsea River Revel 5K Road Race. This deviation allows the bridge to remain closed...

77 FR 58773 - Drawbridge Operation Regulations; James River, Newport News, VA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-09-24

... Operation Regulations; James River, Newport News, VA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... schedule that governs the US 17/258 Bridge across the James River, mile 5.0, at Newport News, VA. The... 17/258 Bridge over the James River, mile 5.0, at Newport News, VA opens on signal as required by 33...

76 FR 40234 - Drawbridge Operation Regulations; Harlem River, New York City, NY

Federal Register 2010, 2011, 2012, 2013, 2014

2011-07-08

...-AA09 Drawbridge Operation Regulations; Harlem River, New York City, NY AGENCY: Coast Guard, DHS. ACTION... at mile 0.0, across the Harlem River at New York City, New York. This interim rule is necessary to... The 103rd Street (Wards Island) Pedestrian Bridge, across the Harlem River, mile 0.0, at New York City...

76 FR 3516 - Drawbridge Operation Regulations; Harlem River, New York City, NY

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-20

... Operation Regulations; Harlem River, New York City, NY AGENCY: Coast Guard, DHS. ACTION: Notice of temporary..., across the Harlem River, New York City, New York. The deviation is necessary to facilitate bridge... River at mile 0.0 has a vertical clearance in the closed position of 55 feet at mean high water and 60...

78 FR 53104 - Drawbridge Operation Regulation; Hackensack River, Kearny and Jersey City, NJ

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-28

...-AA09 Drawbridge Operation Regulation; Hackensack River, Kearny and Jersey City, NJ AGENCY: Coast Guard... River, mile 2.0, between Kearny and Jersey City, New Jersey. The bridge owner, New Jersey Department of...) Bridge at mile 2.0, across the Hackensack River between Kearny and Jersey City, New Jersey, has a...

75 FR 24400 - Drawbridge Operation Regulation; CSX Railroad, Trout River, Mile 0.9, Jacksonville, FL

Federal Register 2010, 2011, 2012, 2013, 2014

2010-05-05

...-AA09 Drawbridge Operation Regulation; CSX Railroad, Trout River, Mile 0.9, Jacksonville, FL AGENCY... operation of the CSX Railroad Bridge across the Trout River, mile 0.9, Jacksonville, Florida. This rule will... (NPRM) entitled CSX Railroad, Trout River, mile 0.9, Jacksonville, FL in the Federal Register (74 FR 106...

76 FR 52263 - Special Local Regulation for Marine Events; Mattaponi Madness Drag Boat Race, Mattaponi River...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-22

...-AA08 Special Local Regulation for Marine Events; Mattaponi Madness Drag Boat Race, Mattaponi River... power boat races to be held on the waters of the Mattaponi River, near Wakema, Virginia. These special.... This action is intended to restrict vessel traffic during the drag boat races on the Mattaponi River...

Freshwater mussel assemblage structure in a regulated river in the Lower Mississippi river Alluvial Basin, USA

Treesearch

Wendell R. Haag; Melvin L. Warren

2007-01-01

1. This paper documents a diverse, reproducing freshwater mussel community (20 species) in Lower Lake } an impounded, regulated portion of the Little Tallahatchie River below Sardis Dam in Panola Co., Mississippi, USA. 2. Despite being regulated and impounded, the lake has a heterogeneous array of habitats that differ markedly in mussel community attributes...

Dynamic hydro-climatic networks in pristine and regulated rivers

NASA Astrophysics Data System (ADS)

Botter, G.; Basso, S.; Lazzaro, G.; Doulatyari, B.; Biswal, B.; Schirmer, M.; Rinaldo, A.

2014-12-01

Flow patterns observed at-a-station are the dynamical byproduct of a cascade of processes involving different compartments of the hydro-climatic network (e.g., climate, rainfall, soil, vegetation) that regulates the transformation of rainfall into streamflows. In complex branching rivers, flow regimes result from the heterogeneous arrangement around the stream network of multiple hydrologic cascades that simultaneously occur within distinct contributing areas. As such, flow regimes are seen as the integrated output of a complex "network of networks", which can be properly characterized by its degree of temporal variability and spatial heterogeneity. Hydrologic networks that generate river flow regimes are dynamic in nature. In pristine rivers, the time-variance naturally emerges at multiple timescales from climate variability (namely, seasonality and inter-annual fluctuations), implying that the magnitude (and the features) of the water flow between two nodes may be highly variable across different seasons and years. Conversely, the spatial distribution of river flow regimes within pristine rivers involves scale-dependent transport features, as well as regional climatic and soil use gradients, which in small and meso-scale catchments (A < 103 km2) are usually mild enough to guarantee quite uniform flow regimes and high spatial correlations. Human-impacted rivers, instead, constitute hybrid networks where observed spatio-temporal patterns are dominated by anthropogenic shifts, such as landscape alterations and river regulation. In regulated rivers, the magnitude and the features of water flows from node to node may change significantly through time due to damming and withdrawals. However, regulation may impact river regimes in a spatially heterogeneous manner (e.g. in localized river reaches), with a significant decrease of spatial correlations and network connectivity. Provided that the spatial and temporal dynamics of flow regimes in complex rivers may strongly impact important biotic processes involved in the river food web (e.g. biofilm and riparian vegetation dynamics), the study of rivers as dynamic networks provides important clues to water management strategies and freshwater ecosystem studies.

Lake Erie Water Level Study. Appendix G. Recreational Beaches and Boating.

DTIC Science & Technology

1981-07-01

economic impact analysis). G-44 I There are two separate phases associated with the development of bene- fits generated at the various water levels in...moorings. The growth factors for the small boat harbor formula (MRI Technical Report No. 5, Economic Impacts of Lake Level Regulation) were developed by...Lakes-St. Lawrence River system. This evaluation was limited to Lakes Erie and Ontario and part of the St. Lawrence River where the

Wintering waterbirds in a large river floodplain: Hydrological connectivity is the key for reconciling development and conservation.

PubMed

Xia, Shaoxia; Liu, Yu; Wang, Yuyu; Chen, Bin; Jia, Yifei; Liu, Guanhua; Yu, Xiubo; Wen, Li

2016-12-15

An alteration in the hydrological connectivity reduces the synergistic processes and interactions between rivers and their floodplains, and changes the distribution of waterbirds that rely on floodplains as foraging grounds. Recent river and wetland conservation and restoration efforts have been partially focused on reinstating the natural river-floodplain connectivity to ameliorate the ecological effects of regulation in river systems. However, in regions where human well-being is tightly linked with the cultivation of the floodplain (such as fisheries), management options are constrained and trade-offs among competing social, economic and ecological goals may be necessary for the wise use of wetlands. Poyang Lake in east central China includes numerous sub-lakes with different types of hydrological regulation; therefore, this lake may provide a useful context for exploring the likelihood of such trade-offs. In this study, we used multiyear simultaneous waterbird survey data together with habitat maps derived from satellite imagery for Poyang Lake to examine the variations in waterbird community structure and abundance within sub-lakes with different types of hydrological regulation. Using a Bayesian Markov chain Monte Carlo approach, we built generalized linear mixed models to explore the differences in wetland composition and waterbird abundance/diversity among three lake types (i.e. isolated, freely connected, and controlled) at community, guild and species levels. The results showed hydrological connectivity alteration clearly affects wintering waterbirds; in addition, the ecological benefits of a natural flow regime were most unambiguous at the community level. Nevertheless, little evidence exists to indicate that the lakes' ecological values as waterbird foraging grounds were compromised by partial regulation. That is, species richness and population size were comparable in naturally connected and controlled lakes. Our results suggest that, with carefully designed management plans, a delicate balance between waterbird conservation and development can be accomplished in large river floodplains. Crown Copyright © 2016. Published by Elsevier B.V. All rights reserved.

Water Quality Conditions in the Missouri River Mainstem System. 2009 Report

DTIC Science & Technology

2010-09-01

Navigation Channel Reach ............................................................................. 117  6.2  Flow Regulation...118  6.2.2  Historic Flow Releases...118  6.2.3  Flow Releases for Water Quality management

18 CFR 1304.207 - Channel excavation on TVA-owned residential access shoreland.

Code of Federal Regulations, 2010 CFR

2010-04-01

... Resources TENNESSEE VALLEY AUTHORITY APPROVAL OF CONSTRUCTION IN THE TENNESSEE RIVER SYSTEM AND REGULATION... the reservoir bottom is exposed and dry. (h) Spoil material from channel excavations must be placed in...

75 FR 76943 - Regulated Navigation Area; Hudson River South of the Troy Locks, NY

Federal Register 2010, 2011, 2012, 2013, 2014

2010-12-10

...-AA11 Regulated Navigation Area; Hudson River South of the Troy Locks, NY AGENCY: Coast Guard, DHS... Navigation Area (RNA) on the navigable waters of the Hudson River in New York, south of the Troy Locks. This... within the waters of the Hudson River south of the Troy Locks when ice is a threat to navigation. DATES...

76 FR 8654 - Regulated Navigation Area; Hudson River South of the Troy Locks, NY

Federal Register 2010, 2011, 2012, 2013, 2014

2011-02-15

...-AA11 Regulated Navigation Area; Hudson River South of the Troy Locks, NY AGENCY: Coast Guard, DHS... navigable waters of the Hudson River in New York, south of the Troy Locks. This action is necessary to... Hudson River south of the Troy Locks when ice is a threat to navigation. DATES: This rule is effective in...

78 FR 11094 - Drawbridge Operation Regulation; James River, Between Isle of Wight and Newport News, VA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-15

... Operation Regulation; James River, Between Isle of Wight and Newport News, VA AGENCY: Coast Guard, DHS... River, mile 5.0, between Isle of Wight and Newport News, VA. This deviation is necessary to facilitate... Isle of Isle and Newport News, VA opens on signal. The James River Bridge has vertical clearances in...

Detecting climate change oriented and human induced changes in stream temperature across the Southeastern U.S.

NASA Astrophysics Data System (ADS)

Zhang, X.; Voisin, N.; Cheng, Y.; Niemeyer, R. J.; Nijssen, B.; Yearsley, J. R.; Zhou, T.

2017-12-01

In many areas, climate change is expected to alter the flow regime and increase stream temperature, especially during summer low flow periods. During these low flow periods, water management increases flows in order to sustain human activities such as water for irrigation and hydroelectric power generation. Water extraction from rivers during warm season can increase stream temperature while reservoir regulation may cool downstream river temperatures by releasing cool water from deep layers. Thus, it is reasonable to hypothesize that water management changes the sensitivity of the stream temperature regime to climate change when compared to unmanaged resources. The time of emergence of change refers to the point in time when observations, or model simulations, show statistically significant changes from a given baseline period, i.e. above natural variability. Here we aim to address two questions by investigating the time of emergence of changes in stream temperature in the southeastern United States: what is the sensitivity of stream temperature under regulated flow conditions to climate change and what is the contribution of water management in increasing or decreasing stream temperature sensitivity to climate change. We simulate regulated flow by using runoff from the Variable Infiltration Capacity (VIC) macroscale hydrological model as input into a large scale river routing and reservoir model MOSART-WM. The River Basin Model (RBM), a distributed stream temperature model, includes a two-layer thermal stratification module to simulate stream temperature in regulated river systems. We evaluate the timing of emergence of changes in flow and stream temperature based on climate projections from two representative concentration pathways (RCPs; RCP4.5 and RCP8.5) from the Coupled Model Intercomparison Project Phase 5 (CMIP5). We analyze the difference in emergence of change between natural and regulated streamflow. Insights will be provided toward applications for multiple sectors of activities including electrical resources adequacy studies over the southeastern U.S.

77 FR 51699 - Drawbridge Operation Regulation; Cape Fear River, Wilmington, NC

Federal Register 2010, 2011, 2012, 2013, 2014

2012-08-27

... Operation Regulation; Cape Fear River, Wilmington, NC AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, Fifth Coast Guard District, has issued a temporary [[Page 51700

Quantifying habitat benefits of channel reconfigurations on a highly regulated river system, Lower Missouri River, USA

USGS Publications Warehouse

Erwin, Susannah O.; Jacobson, Robert B.; Elliott, Caroline M.

2017-01-01

We present a quantitative analysis of habitat availability in a highly regulated lowland river, comparing a restored reach with two reference reaches: an un-restored, channelized reach, and a least-altered reach. We evaluate the effects of channel modifications in terms of distributions of depth and velocity as well as distributions and availability of habitats thought to be supportive of an endangered fish, the pallid sturgeon (Scaphirhynchus albus). It has been hypothesized that hydraulic conditions that support food production and foraging may limit growth and survival of juvenile pallid sturgeon. To evaluate conditions that support these habitats, we constructed two-dimensional hydrodynamic models for the three study reaches, two located in the Lower Missouri River (channelized and restored reaches) and one in the Yellowstone River (least-altered reach). Comparability among the reaches was improved by scaling by bankfull discharge and bankfull channel area. The analysis shows that construction of side-channel chutes and increased floodplain connectivity increase the availability of foraging habitat, resulting in a system that is more similar to the reference reach on the Yellowstone River. The availability of food-producing habitat is low in all reaches at flows less than bankfull, but the two reaches in the Lower Missouri River – channelized and restored – display a threshold-like response as flows overtop channel banks, reflecting the persistent effects of channelization on hydraulics in the main channel. These high lateral gradients result in punctuated ecological events corresponding to flows in excess of bankfull discharge. This threshold effect in the restored reach remains distinct from that of the least-altered reference reach, where hydraulic changes are less abrupt and overbank flows more gradually inundate the adjacent floodplain. The habitat curves observed in the reference reach on the Yellowstone River may not be attainable within the channelized system on the Missouri River, but the documented hydraulic patterns can be used to inform ongoing channel modifications. Although scaling to bankfull dimensions and discharges provides a basis for comparing the three reaches, implementation of the reference reach concept was complicated by differences in flow-frequency distributions among sites. In particular, habitat availability in the least-altered Yellowstone River reach is affected by increased frequency of low-flow events (less than 0.5 times bankfull flow) and moderately high-flow events (greater than 1.5 times bankfull flow) compared to downstream reaches on the Lower Missouri River.

77 FR 25077 - Special Local Regulation; Wy-Hi Rowing Regatta, Trenton Channel; Detroit River, Wyandotte, MI

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-27

...-AA08 Special Local Regulation; Wy-Hi Rowing Regatta, Trenton Channel; Detroit River, Wyandotte, MI..., during, and immediately after the Wy-Hi Rowing Regatta. This special local regulation will establish....35T09-0342 Special Local Regulation; Wy-Hi Rowing Regatta, Wyandotte, MI. (a) Regulated Area. A...

77 FR 25073 - Special Local Regulation; Hebda Cup Rowing Regatta, Trenton Channel; Detroit River, Wyandotte, MI

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-27

...-AA08 Special Local Regulation; Hebda Cup Rowing Regatta, Trenton Channel; Detroit River, Wyandotte, MI..., during, and immediately after the Hebda Cup Rowing Regatta. This special local regulation will establish....35T09-0340 Special Local Regulation; Hebda Cup Rowing Regatta, Wyandotte, MI. (a) Regulated area. A...

Influence of reservoirs on solute transport: A regional-scale approach

USGS Publications Warehouse

Kelly, V.J.

2001-01-01

Regional transport of water and dissolved constituents through heavily regulated river systems is influenced by the presence of reservoirs. Analysis of seasonal patterns in solute fluxes for salinity and nutrients indicates that in-reservoir processes within large storage reservoirs in the Rio Grande and Colorado basins (southwestern USA) are superimposed over the underlying watershed processes that predominate in relatively unregulated stream reaches. Connectivity of the aquatic system with the landscape is apparently disrupted by processes within the reservoir systems; these processes result in large changes in characteristics for solute transport that persist downstream in the absence of significant inputs. Additionally, reservoir processes may be linked for upstream/downstream reservoirs that are located relatively close in a series. In contrast, the regional effect of in-reservoir processes is negligible for solute transport through run-of-river reservoirs in the lower Columbia River (northwestern USA).

A model to predict the evolution of a gravel bed river under an imposed cyclic hydrograph and its application to the Trinity River

NASA Astrophysics Data System (ADS)

Viparelli, Enrica; Gaeuman, David; Wilcock, Peter; Parker, Gary

2011-02-01

Major changes in the morphology of the Trinity River in California, such as narrowing of the cross section and sedimentation of fine sediment in pools, occurred after the closure of a system of dams. These changes caused a dramatic reduction in the salmonid population and a resulting decline of the fishery. Gravel augmentation, regulated flood releases, and mechanical channel rehabilitation are currently being implemented to help restore the aquatic habitat of the river. The present paper describes a tool, named the Spawning Gravel Refresher, for designing and predicting the effects of gravel augmentation in gravel bed rivers. The tool assumes an imposed, cycled hydrograph. The model is calibrated and applied to the regulated reach of the Trinity River in four steps: (1) zeroing runs to reproduce conditions of mobile bed equilibrium as best can be estimated for the predam Trinity River, (2) runs to compare the predictions with the results of previous studies, (3) runs at an engineering time scale to reproduce the effects of the dams, and (4) runs to design gravel augmentation schemes. In the fourth group of runs, the combined effects of engineered flood flow releases and gravel augmentation are predicted. At an engineering time scale, the model indicates that the fraction of fine sediment in the surface layer and in the topmost part of the substrate should decrease when subjected to these two restoration measures, with a consequent improvement of the quality of the spawning gravel.

Assessing Impacts of Hydropower Regulation on Salmonid Habitat Connectivity to Guide River Restoration

NASA Astrophysics Data System (ADS)

Buddendorf, Bas; Geris, Josie; Malcolm, Iain; Wilkinson, Mark; Soulsby, Chris

2016-04-01

Anthropogenic activity in riverine ecosystems has led to a substantial divergence from the natural state of many rivers globally. Many of Scotland's rivers have been regulated for hydropower with increasing intensity since the 1890s. At the same time they sustain substantial populations of Atlantic Salmon (Salmo salar L.), which have a range of requirements in terms of flow and access to habitat, depending on the different life-stages. River barriers for hydropower regulation can change the spatial and temporal connectivity within river networks, the impacts of which on salmon habitat are not fully understood. Insight into such changes in connectivity, and the link with the distribution and accessibility of suitable habitat and areas of high productivity, are essential to aid restoration and/or conservation efforts. This is because they indicate where such efforts might have a higher chance of being successful in terms of providing suitable habitat and increasing river productivity. In this study we applied a graph theory approach to assess historic (natural) and contemporary (regulated) in-stream habitat connectivity of the River Lyon, an important UK salmon river that is moderately regulated for hydropower. Historic maps and GIS techniques were used to construct the two contrasting river networks (i.e., natural vs. regulated). Subsequently, connectivity metrics were used to assess the impacts of hydropower infrastructure on upstream and downstream migration possibilities for adults and juveniles, respectively. A national juvenile salmon production model was used to weight the importance of reaches for juvenile salmon production. Results indicate that the impact of barriers in the Lyon on the connectivity indices depends on the type of barrier and its location within the network, but is generally low for both adults and juveniles, and that compared to the historic river network the reduction in the amount of suitable habitat and juvenile production is most marked in the upper reaches of the river. This study represents an improved approach over more commonly applied assessments that focus on the impact of impoundment on wetted area or river length. Simpler approaches often lack ecological and hydrological detail leading to over- or underestimation of the impacts of river regulation on connectivity depending on the relative quality of available habitat. Our work aims to integrate hydrological and ecological aspects into a spatially explicit connectivity framework. Such an approach can help to better identify those areas most important to the conservation of fish habitat, inform sustainable management of hydropower schemes, and aid cost-efficient river restoration and management efforts.

Impacts of human activities on nutrient transport in the Yellow River: The role of the Water-Sediment Regulation Scheme.

PubMed

Li, Xinyu; Chen, Hontao; Jiang, Xueyan; Yu, Zhigang; Yao, Qingzhen

2017-08-15

Anthropogenic activities alter the natural states of large rivers and their surrounding environment. The Yellow River is a well-studied case of a large river with heavy human control. An artificial managed water and sediment release system, known as the Water-Sediment Regulation Scheme (WSRS), has been carried out annually in the Yellow River since 2002. Nutrient concentrations and composition display significant time and space variations during the WSRS period. To figure out the anthropogenic impact of nutrient changes and transport in the Yellow River, biogeochemical observations were carried out in both middle reaches and lower reaches of the Yellow River during 2014 WSRS period. WSRS has a direct impact on water oxidation-reduction environment in the middle reaches; concentrations of nitrite (NO 2 - ) and ammonium (NH 4 + ) increased, while nitrate (NO 3 - ) concentration decreased by enhanced denitrification. WSRS changed transport of water and sediment; dissolved silicate (DSi) in the middle reaches was directly controlled by sediments release during the WSRS while in the lower reaches, DSi changed with both sediments and water released from middle reaches. During the WSRS, the differences of nutrient fluxes and concentrations between lower reaches and middle reaches were significant; dissolved inorganic phosphorous (DIP) and dissolved inorganic nitrogen (DIN) were higher in low reaches because of anthropogenic inputs. Human intervention, especially WSRS, can apparently change the natural states of both the mainstream and estuarine environments of the Yellow River within a short time. Copyright © 2017 Elsevier B.V. All rights reserved.

Modelling white-water rafting suitability in a hydropower regulated Alpine River.

PubMed

Carolli, Mauro; Zolezzi, Guido; Geneletti, Davide; Siviglia, Annunziato; Carolli, Fabiano; Cainelli, Oscar

2017-02-01

Cultural and recreational river ecosystem services and their relations with the flow regime are still poorly investigated. We develop a modelling-based approach to assess recreational flow requirements and the spatially distributed river suitability for white-water rafting, a typical service offered by mountain streams, with potential conflicts of interest with hydropower regulation. The approach is based on the principles of habitat suitability modelling using water depth as the main attribute, with preference curves defined through interviews with local rafting guides. The methodology allows to compute streamflow thresholds for conditions of suitability and optimality of a river reach in relation to rafting. Rafting suitability response to past, present and future flow management scenarios can be predicted on the basis of a hydrological model, which is incorporated in the methodology and is able to account for anthropic effects. Rafting suitability is expressed through a novel metric, the "Rafting hydro-suitability index" (RHSI) which quantifies the cumulative duration of suitable and optimal conditions for rafting. The approach is applied on the Noce River (NE Italy), an Alpine River regulated by hydropower production and affected by hydropeaking, which influences suitability at a sub-daily scale. A dedicated algorithm is developed within the hydrological model to resemble hydropeaking conditions with daily flow data. In the Noce River, peak flows associated with hydropeaking support rafting activities in late summer, highlighting the dual nature of hydropeaking in regulated rivers. Rafting suitability is slightly reduced under present, hydropower-regulated flow conditions compared to an idealized flow regime characterised by no water abstractions. Localized water abstractions for small, run-of-the-river hydropower plants are predicted to negatively affect rafting suitability. The proposed methodology can be extended to support decision making for flow management in hydropower regulated streams, as it has the potential to quantify the response of different ecosystem services to flow regulation. Copyright © 2016 Elsevier B.V. All rights reserved.

78 FR 14447 - Special Regulations; Areas of the National Park System, Chattahoochee River National Recreation...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-06

... children. 6. Expanded opportunities for mountain biking will increase tourism and benefit local economies... their right to self-governance and tribal sovereignty. We have evaluated this rule under the Department...

76 FR 62298 - Special Local Regulations; Line of Sail Marine Parade, East River and Brunswick River, Brunswick, GA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-10-07

...-AA08 Special Local Regulations; Line of Sail Marine Parade, East River and Brunswick River, Brunswick... during the Line of Sail Marine Parade on Saturday, October 8, 2011. The marine parade will consist of... did not receive notice of the Line of Sail Marine Parade with sufficient time to publish an NPRM or to...

33 CFR 165.510 - Delaware Bay and River, Salem River, Christina River and Schuylkill River-Regulated Navigation Area.

Code of Federal Regulations, 2010 CFR

2010-07-01

... within the regulated navigation area and: (i) Sustained winds are greater than 25 knots but less than 40 knots, ensure the main engines are ready to provide full power in five minutes or less; and (ii) Sustained winds are 40 knots or over, ensure that the main engines are on line to immediately provide...

Development of water level regulation strategy for fish and wildlife, upper Mississippi River system

USGS Publications Warehouse

Lubinski, Kenneth S.; Carmody, G.; Wilcox, D.; Drazkowski, B.

1991-01-01

Water level regulation has been proposed as a tool for maintaining or enhancing fish and wildlife resources in navigation pools and associated flood plains of the Upper Mississippi River System. Research related to the development of water level management plans is being conducted under the Long Term Resource Monitoring Program. Research strategies include investigations of cause and effect relationships, spatial and temporal patterns of resource components, and alternative problem solutions. The principal hypothesis being tested states that water level fluctuations resulting from navigation dam operation create less than optimal conditions for the reproduction and growth of target aquatic macrophyte and fish species. Representative navigation pools have been selected to describe hydrologic, engineering, and legal constraints within which fish and wildlife objectives can be established. Spatial analyses are underway to predict the magnitude and location of habitat changes that will result from controlled changes in water elevation.

An ecohydrologic framework for simulating catchment constraints on smallholder irrigation systems in drylands

NASA Astrophysics Data System (ADS)

Gower, D.; McCord, P. F.; Caylor, K. K.; Dell'Angelo, J.; Evans, T. P.

2016-12-01

Community water projects (CWPs) in the Laikipia region of Central Kenya distribute river water to smallholder farmers who otherwise lack access to municipal systems or private water sources. Participating farmers are better able to withstand climatic conditions commonly found in drylands, including high potential evapotranspiration combined with low and variable rainfall. To provide these benefits, however, CWPs must be able to deliver water in sufficient quantities and with sufficient regularity to all farmers in the network. Factors such as variable river flow, aging infrastructure and increasing membership pose challenges to the CWP management in fulfilling this task. During the dry season, river levels typically decline, reducing water available for CWP and increasing the importance of intake position within the catchment. CWPs with intakes in upstream areas have first access to river water but rely on a smaller drainage network while those in downstream areas are affected by the opposite conditions. Such conditions have pushed CWPs to jointly regulate their water consumption by setting withdrawal limits and coordinating withdrawal schedules with one another. Regulations also ensure that river water is not completely consumed by CWPs, allowing some flow to exit the catchment for human or environmental reasons. This paper uses a simple numerical model to calculate the monetary benefit that individual farmers receive from membership in a CWP. In the model, the CWP provides water to a variable number of farmers in exchange for membership fees while farmers must grow sufficient crops to feed themselves and pay fees. The model shows that, under conditions similar to those in Laikipia, CWP can consistently provide adequate benefits to its members only with intakes at particular locations within the catchment or with specific regulations in place. Otherwise, the economic benefits of CWP membership will gradually fall below the cost of membership. This result may help in developing recommendations as to how CWP should be located and managed in similar areas.

River network bedload model: a tool to investigate the impact of flow regulation on grain size distribution in a large Alpine catchment

NASA Astrophysics Data System (ADS)

Costa, Anna; Molnar, Peter

2017-04-01

Sediment transport rates along rivers and the grain size distribution (GSD) of coarse channel bed sediment are the result of the long term balance between transport capacity and sediment supply. Transport capacity, mainly a function of channel geometry and flow competence, can be altered by changes in climatic forcing as well as by human activities. In Alpine rivers it is hydropower production systems that are the main causes of modification to the transport capacity of water courses through flow regulation, leading over longer time scales to the adjustment of river bed GSDs. We developed a river network bedload transport model to evaluate the impacts of hydropower on the transfer of sediments and the GSDs of the Upper Rhône basin, a 5,200 km2 catchment located in the Swiss Alps. Many large reservoirs for hydropower production have been built along the main tributaries of the Rhône River since the 1960s, resulting in a complex system of intakes, tunnels, and pumping stations. Sediment storage behind dams and intakes, is accompanied by altered discharge due to hydropower operations, mainly higher flow in winter and lower in summer. It is expected that this change in flow regime may have resulted in different bedload transport. However, due the non-linear, threshold-based nature of the relation between discharge and sediment mobilization, the effects of changed hydraulic conditions are not easily deducible, and because observations of bedload in pre- and post-dam conditions are usually not available, a modelling approach is often necessary. In our modelling approach, the river network is conceptualized as a series of connected links (river reaches). Average geometric characteristics of each link (width, length, and slope of cross section) are extracted from digital elevation data, while surface roughness coefficients are assigned based on the GSD. Under the assumptions of rectangular prismatic cross sections and normal flow conditions, bed shear stress is estimated from available time series of daily discharge distributed along the river network. Potential bedload transport is estimated by the Wilcock and Crowe surface-based model for the entire GSD. Mass balance between transport capacity and sediment supply, applied to each individual grain size, determines the actual transport and the resulting GSD of the channel bed. Channel bed erosion is allowed through a long-term erosion rate. Sediment input from hillslopes is included as lateral sediment flux. Initial and boundary conditions are set based on available data of GSDs, while an approximation of the depth of the mobile bed is selected through sensitivity analysis. With the river network bedload model we aim to estimate the effect of flow regulation, i.e. altered transport capacity, on sediment transport and GSD of the entire Rhône river system. The model can also be applied as a tool to explore possible changes in bedload transport and channel GSDs under different discharge scenarios based, for example, on climate change projections or modified hydropower operation policies.

User's guide to SSARRMENU

USGS Publications Warehouse

Mastin, M.C.; Le, Thanh

2001-01-01

The U.S. Geological Survey, in cooperation with Pierce County Department of Public Works, Washington, has developed an operational tool called the Puyallup Flood-Alert System to alert users of impending floods in the Puyallup River Basin. The system acquires and incorporates meteorological and hydrological data into the Streamflow Synthesis and Reservoir Regulation (SSARR) hydrologic flow-routing model to simulate floods in the Puyallup River Basin. SSARRMENU is the user-interactive graphical interface between the user, the input and output data, and the SSARR model. In a companion cooperative project with Pierce County, the SSARR model for the Puyallup River Basin was calibrated and validated. The calibrated model is accessed through SSARRMENU, which has been specifically programed for the Puyallup River and the needs of Pierce County. SSARRMENU automates the retrieval of data from ADAPS (Automated DAta Processing System, the U.S. Geological Survey?s real-time hydrologic database), formats the data for use with SSARR, initiates SSARR model runs, displays alerts for impending floods, and provides utilities to display the simulated and observed data. An on-screen map of the basin and a series of menu items provide the user wi

78 FR 64887 - Drawbridge Operation Regulation; Upper Mississippi River, Hannibal, MO

Federal Register 2010, 2011, 2012, 2013, 2014

2013-10-30

... Operation Regulation; Upper Mississippi River, Hannibal, MO AGENCY: Coast Guard, DHS. ACTION: Notice of... operating schedule that governs the Hannibal Railroad Drawbridge across the Upper Mississippi River, mile 309.9, at Hannibal, Missouri. The deviation is necessary to allow the bridge owner time to replace...

76 FR 11959 - Drawbridge Operation Regulations; Hackensack River, Jersey City, NJ, Maintenance

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-04

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-0066] Drawbridge Operation Regulations; Hackensack River, Jersey City, NJ, Maintenance AGENCY: Coast Guard, DHS. ACTION... 3.1, across the Hackensack River, at Jersey City, New Jersey. The deviation is necessary to perform...

76 FR 27250 - Drawbridge Operation Regulations; Hackensack River, Jersey City, NJ

Federal Register 2010, 2011, 2012, 2013, 2014

2011-05-11

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-0330] Drawbridge Operation Regulations; Hackensack River, Jersey City, NJ AGENCY: Coast Guard, DHS. ACTION: Notice of... Hackensack River, mile 3.4, at Jersey City, New Jersey. The deviation is necessary to repair structural steel...

76 FR 9224 - Drawbridge Operation Regulations; Hackensack River, Jersey City, NJ

Federal Register 2010, 2011, 2012, 2013, 2014

2011-02-17

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-0041] Drawbridge Operation Regulations; Hackensack River, Jersey City, NJ AGENCY: Coast Guard, DHS. ACTION: Notice of... Hackensack River, mile 3.4, at Jersey City, New Jersey. The deviation is necessary to repair structural steel...

75 FR 16006 - Drawbridge Operation Regulation; Sacramento River, Sacramento, CA

Federal Register 2010, 2011, 2012, 2013, 2014

2010-03-31

... Operation Regulation; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary..., mile 59.4, at Sacramento, CA. The deviation is necessary to allow the bridge owner to make bridge... Sacramento River, at Sacramento, CA. The I Street Drawbridge navigation span provides 109 feet vertical...

76 FR 26181 - Drawbridge Operation Regulation; Sacramento River, Sacramento, CA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-05-06

... Operation Regulation; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... 59.0, at Sacramento, CA. The deviation is necessary to allow the community to participate in the Hope... Drawbridge, mile 59.0, over Sacramento River, at Sacramento, CA. The drawbridge navigation span provides a...

76 FR 11960 - Drawbridge Operation Regulation; Sacramento River, Sacramento, CA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-04

... Operation Regulation; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary..., mile 59.0, at Sacramento, CA. The deviation is necessary to allow the community to participate in the... Tower Drawbridge, mile 59.0, Sacramento River, at Sacramento, CA. The Tower Drawbridge navigation span...

76 FR 23188 - Drawbridge Operation Regulation; Sacramento River, Sacramento, CA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-04-26

... Operation Regulation; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary..., mile 59.0, at Sacramento, CA. The deviation is necessary to allow the community to participate in the... Tower Drawbridge, mile 59.0, Sacramento River, at Sacramento, CA. The Tower Drawbridge navigation span...

76 FR 79067 - Drawbridge Operation Regulation; Sacramento River, Sacramento, CA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-12-21

... Operation Regulation; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary..., mile 59.0, at Sacramento, CA. The deviation is necessary to allow community celebration of New Year's... Tower Drawbridge, mile 59.0, Sacramento River, at Sacramento, CA. The Tower Drawbridge navigation span...

76 FR 20843 - Drawbridge Operation Regulation; Sacramento River, Sacramento, CA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-04-14

... Operation Regulation; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary..., mile 59.0, at Sacramento, CA. The deviation is necessary to allow the community to participate in the... the Tower Drawbridge, mile 59.0, Sacramento River, at Sacramento, CA. The Tower Drawbridge navigation...

77 FR 10371 - Drawbridge Operation Regulation; Sacramento River, Sacramento, CA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-22

... Operation Regulation; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary..., mile 59.0, at Sacramento, CA. The deviation is necessary to allow the bridge owner to conduct... change to the operation of the Tower Drawbridge, mile 59.0, Sacramento River, at Sacramento, CA. The...

77 FR 1407 - Regulated Navigation Area; Memorial Bridge Construction, Piscataqua River, Portsmouth, NH

Federal Register 2010, 2011, 2012, 2013, 2014

2012-01-10

...-AA11 Regulated Navigation Area; Memorial Bridge Construction, Piscataqua River, Portsmouth, NH AGENCY... River under and surrounding the Memorial Bridge between Portsmouth, NH and Kittery, ME. This temporary interim rule is necessary to provide for the safety of life on the navigable waters during bridge...

Streamflow statistics for unregulated and regulated conditions for selected locations on the Upper Yellowstone and Bighorn Rivers, Montana and Wyoming, 1928-2002

USGS Publications Warehouse

Chase, Katherine J.

2014-01-01

Major floods in 1996 and 1997 intensified public debate about the effects of human activities on the Yellowstone River. In 1999, the Yellowstone River Conservation District Council was formed to address conservation issues on the river. The Yellowstone River Conservation District Council partnered with the U.S. Army Corps of Engineers to carry out a cumulative effects study on the main stem of the Yellowstone River. The cumulative effects study is intended to provide a basis for future management decisions within the watershed. Streamflow statistics, such as flow-frequency data calculated for unregulated and regulated streamflow conditions, are a necessary component of the cumulative effects study. The U.S. Geological Survey, in cooperation with the Yellowstone River Conservation District Council and the U.S. Army Corps of Engineers, calculated low-flow frequency data and general monthly and annual statistics for unregulated and regulated streamflow conditions for the Upper Yellowstone and Bighorn Rivers for the 1928–2002 study period; these data are presented in this report. Unregulated streamflow represents flow conditions during the 1928–2002 study period if there had been no water-resources development in the Yellowstone River Basin. Regulated streamflow represents estimates of flow conditions during the 1928–2002 study period if the level of water-resources development existing in 2002 was in place during the entire study period.

Abundance and reproduction of toads (Bufo) along a regulated river in the southwestern United States: Importance of flooding in riparian ecosystems

Treesearch

H. L. Bateman; M. J. Harner; A. Chung-MacCoubrey

2008-01-01

Abundance and size of toads (Bufo woodhousii and B. cognatus) were related to precipitation, river flow, and groundwater over 7 years along the Middle Rio Grande, a regulated river in the semi-arid southwestern United States. Toads were monitored in riparian areas at 12 sites spanning 140 km of river during summers 2000­2006....

Water resource protection in Australia: Links between land use and river health with a focus on stubble farming systems

NASA Astrophysics Data System (ADS)

Bowmer, Kathleen H.

2011-06-01

SummaryStubble farming (conservation farming, minimum tillage, zero tillage) has increased in Australia over several decades with claims of improved productivity, landscape stability and environmental benefit including ecosystem services downstream, yet recent audits show a dramatic and general decline in river health. This review explores explanations for this apparent anomaly. Many confounding factors complicate interactions between land use and river condition and may disguise or over-ride the potential benefits of adoption of stubble systems or other improvements in agricultural land use practice. These factors include climate change and variability; land use changes including an increase in bushfires, growth of farm dams and afforestation; lag times between land use change and expression of benefits in river systems; use of inappropriate scale that disguises local benefit; variations in the extent of ecosystem resilience; impacts of river regulation; and impacts of introduced species. Additionally, the value of river condition and utility is complicated by different local or regional perceptions and by contrasting rural and urban outlooks. The use of indicators, risk frameworks and biophysical modelling may help elucidate the complex relationships between land use and downstream ecosystem impact. The strengthening of local, regional and catchment scale approaches is advocated. This includes the re-integration of land management and governance with water management and planning. It is encouraging that farmers are themselves developing systems to optimise trade-offs between on-farm activities and ecosystem service benefits. This approach needs to be supported and extended.

WHAT TO DO IF THERE IS NO REFERENCE SYSTEM

EPA Science Inventory

Efficient management and regulation of anthropogenic point source inputs requires a demonstrated and measurable ecological effect. In all ecosystems, the evaluation of anthropogenic effects is confounded by the effects of naturally existing environmental factors and river nonpoin...

76 FR 39289 - Special Local Regulation; Detroit APBA Gold Cup, Detroit River, Detroit, MI

Federal Register 2010, 2011, 2012, 2013, 2014

2011-07-06

...-AA08 Special Local Regulation; Detroit APBA Gold Cup, Detroit River, Detroit, MI AGENCY: Coast Guard... immediately after the Detroit APBA Gold Cup boat race. This special local regulation will establish... entry found in 33 CFR 100.918, Detroit APBA Gold Cup, Detroit, MI. Currently, the regulations located at...

33 CFR 100.920 - Tug Across the River, Detroit, MI.

Code of Federal Regulations, 2010 CFR

2010-07-01

... desiring to enter or operate within the regulated area shall contact the Coast Guard Patrol Commander to.... (a) Regulated Area. A regulated area is established to include all waters of the Detroit River... of § 100.901 apply. No vessel may enter, transit through, or anchor within the regulated area without...

76 FR 9221 - Special Local Regulations; Patriot Challenge Kayak Race, Ashley River, Charleston, SC

Federal Register 2010, 2011, 2012, 2013, 2014

2011-02-17

...-AA08 Special Local Regulations; Patriot Challenge Kayak Race, Ashley River, Charleston, SC AGENCY... regulations for the Patriot Challenge Kayak Race in Charleston, SC. The race will take place on April 10, 2011... navigable waters during the race. These special local regulations will temporarily restrict vessel traffic...

78 FR 21258 - Special Local Regulations; Patriot Challenge Kayak Race, Ashley River; Charleston, SC

Federal Register 2010, 2011, 2012, 2013, 2014

2013-04-10

...-AA08 Special Local Regulations; Patriot Challenge Kayak Race, Ashley River; Charleston, SC AGENCY... regulation for the Patriot Challenge Kayak Race in Charleston, SC. The race will take place on April 13, 2013... navigable waters of the United States during the race. The special local regulation will temporarily...

Assessing changes in extreme river flow regulation from non-stationarity in hydrological scaling laws

NASA Astrophysics Data System (ADS)

Rodríguez, Estiven; Salazar, Juan Fernando; Villegas, Juan Camilo; Mercado-Bettín, Daniel

2018-07-01

Extreme flows are key components of river flow regimes that affect manifold hydrological, geomorphological and ecological processes with societal relevance. One fundamental characteristic of extreme flows in river basins is that they exhibit scaling properties which can be identified through scaling (power) laws. Understanding the physical mechanisms behind such scaling laws is a continuing challenge in hydrology, with potential implications for the prediction of river flow regimes in a changing environment and ungauged basins. After highlighting that the scaling properties are sensitive to environmental change, we develop a physical interpretation of how temporal changes in scaling exponents relate to the capacity of river basins to regulate extreme river flows. Regulation is defined here as the basins' capacity to either dampen high flows or to enhance low flows. Further, we use this framework to infer temporal changes in the regulation capacity of five large basins in tropical South America. Our results indicate that, during the last few decades, the Amazon river basin has been reducing its capacity to enhance low flows, likely as a consequence of pronounced environmental change in its south and south-eastern sub-basins. The proposed framework is widely applicable to different basins, and provides foundations for using scaling laws as empirical tools for inferring temporal changes of hydrological regulation, particularly relevant for identifying and managing hydrological consequences of environmental change.

78 FR 16411 - Drawbridge Operation Regulation; Upper Mississippi River, Rock Island, IL

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-15

... Operation Regulation; Upper Mississippi River, Rock Island, IL AGENCY: Coast Guard, DHS. ACTION: Notice of... operating schedule that governs the Rock Island Railroad and Highway Drawbridge across the Upper Mississippi River, mile 482.9, at Rock Island, Illinois. The deviation is necessary to allow the Quad City Heart...

78 FR 69995 - Drawbridge Operation Regulation; Upper Mississippi River, Rock Island, IL

Federal Register 2010, 2011, 2012, 2013, 2014

2013-11-22

... Operation Regulation; Upper Mississippi River, Rock Island, IL AGENCY: Coast Guard, DHS. ACTION: Notice of... operating schedule that governs the Rock Island Railroad and Highway Drawbridge across the Upper Mississippi River, mile 482.9, at Rock Island, Illinois. The deviation is necessary to allow the bridge owner time...

78 FR 18933 - Drawbridge Operation Regulations; Upper Mississippi River, Rock Island, IL

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-28

... Operation Regulations; Upper Mississippi River, Rock Island, IL AGENCY: Coast Guard, DHS. ACTION: Notice of... operating schedule that governs the Rock Island Railroad and Highway Drawbridge across the Upper Mississippi River, mile 482.9, at Rock Island, Illinois. The deviation is necessary to allow the Quad City Marathon...

78 FR 21537 - Drawbridge Operation Regulations; Upper Mississippi River, Rock Island, IL

Federal Register 2010, 2011, 2012, 2013, 2014

2013-04-11

... Operation Regulations; Upper Mississippi River, Rock Island, IL AGENCY: Coast Guard, DHS. ACTION: Notice of... operating schedule that governs the Rock Island Railroad and Highway Drawbridge across the Upper Mississippi River, mile 482.9, at Rock Island, Illinois. The deviation is necessary to allow the Front Street 5K Run...

75 FR 68704 - Drawbridge Operation Regulations; Hackensack River, Jersey City, NJ

Federal Register 2010, 2011, 2012, 2013, 2014

2010-11-09

... temporary deviation from the regulation governing the operation of the Upper Hack Bridge at mile 6.9, across.... SUPPLEMENTARY INFORMATION: The Upper Hack Bridge, across the Hackensack River at mile 6.9 has a vertical.... Under this temporary deviation the Upper Hack Bridge, mile 6.9, across the Hackensack River may remain...

76 FR 4818 - Drawbridge Operation Regulations; Hackensack River, Jersey City, NJ

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-27

... temporary deviation from the regulation governing the operation of the Upper Hack Bridge across the...-9826. SUPPLEMENTARY INFORMATION: The Upper Hack Bridge, across the Hackensack River at mile 6.9 has a... temporary deviation the Upper Hack Bridge, mile 6.9, across the Hackensack River may remain in the closed...

75 FR 52461 - Drawbridge Operation Regulation; Atlantic Intracoastal Waterway, Wrightsville Beach, NC and...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-08-26

... Operation Regulation; Atlantic Intracoastal Waterway, Wrightsville Beach, NC and Northeast Cape Fear River... Bridge across the Northeast Cape Fear River, mile 1.0, at Wilmington, NC. The deviation is necessary to.... Holmes Bridge across the Northeast Cape Fear River, mile 1.0, at Wilmington. The current operating...

76 FR 39298 - Drawbridge Operation Regulation; Christina River, Wilmington, DE

Federal Register 2010, 2011, 2012, 2013, 2014

2011-07-06

... Operation Regulation; Christina River, Wilmington, DE AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... River, at mile 2.8, in Wilmington, DE. The deviation restricts the operation of the draw span in order... Wilmington, DE has a vertical clearance in the closed position to vessels of 13 feet above mean high water...

76 FR 39773 - Drawbridge Operation Regulation; Christina River, Wilmington, DE

Federal Register 2010, 2011, 2012, 2013, 2014

2011-07-07

... Operation Regulation; Christina River, Wilmington, DE AGENCY: Coast Guard, DHS. ACTION: Notice of temporary..., across the Christina River in Wilmington, DE. The deviation restricts the operation of the draw span in... Wilmington, DE has a vertical clearance in the closed position to vessels of 14 feet above mean high water...

76 FR 81826 - Drawbridge Operation Regulation; Pocomoke River, Pocomoke City, MD

Federal Register 2010, 2011, 2012, 2013, 2014

2011-12-29

... Operation Regulation; Pocomoke River, Pocomoke City, MD AGENCY: Coast Guard, DHS. ACTION: Notice of... River, mile 15.6, at Pocomoke City, MD. The deviation restricts the operation of the draw span to... City, MD, has a vertical clearance in the closed position of three feet above mean high water. Under...

78 FR 59231 - Regulated Navigation Area-Tappan Zee Bridge Construction Project, Hudson River; South Nyack and...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-09-26

... 1625-AA11 Regulated Navigation Area--Tappan Zee Bridge Construction Project, Hudson River; South Nyack... Hudson River surrounding the Tappan Zee Bridge. This temporary interim rule allows the Coast Guard to enforce speed and wake restrictions and prohibit all vessel traffic through the RNA during bridge...

78 FR 29648 - Regulated Navigation Area; Waldo-Hancock Bridge Demolition, Penobscot River, Between Prospect and...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-21

... 1625-AA11 Regulated Navigation Area; Waldo-Hancock Bridge Demolition, Penobscot River, Between Prospect... River between Prospect and Verona, ME, under and surrounding the Waldo- Hancock Bridge in order to facilitate the removal of the trusses, cables, and towers of the Waldo-Hancock Bridge. This temporary final...

ARPA LOMBARDIA river gauging network: a great daily effort

NASA Astrophysics Data System (ADS)

Cislaghi, Matteo; Calabrese, Michele; Condemi, Leonardo; Di Priolo, Sara; Parravicini, Paola; Rondanini, Chiara; Russo, Michele; Cazzuli, Orietta; Mussin, Mauro; Serra, Roberto

2017-04-01

ARPA Lombardia is the Environmental Protection Agency of Lombardy, a wide region in northern Italy. ARPA is in charge of river monitoring either for Civil Protection or water balance purposes. Lombardy is characterized by a very complex territory; rivers start from the alpine areas and end in the Po river plain. Each mountain or plain area has specific hydrological features that has to be considered when planning a monitoring network. Moreover, human activities (such as lake regulation, agriculture diversions, hydropower plants with regulation structure etc) add anthropic interferences on the natural river system and can invalidate the collected data. In the last 10 years ARPA performed a major revision of the river gauging network. Each station was analysed using well defined criteria based on the required information (water balance or flood monitoring) and on the suitability of the gauging site (hydraulic characteristic or accessibility for spot measures). In the end more than 30% of the network was revised, many stations were closed and other installed. Particular attention was given to the discharge estimation. Many sites are characterized by backflow effect due to river confluences or to hydropower plants with water regulation structures. In these cases the classic rating curve approach can not be applied. Thus, for the first time in Italy, water velocity side looking doppler sensors were installed on natural rivers and the discharge is estimated with the index velocity method. The Italian Civil Protection Agency requires high transmission standards. No data can be lost for transmission failures and data has to be available every 30 minutes. For these reasons ARPA implemented a double transmission system: the first is based on the existing GPRS network managed by private operators, the second is based on a radio network directly installed by ARPA and totally dedicated to data transmission. This double approach ensures a very robust transmission and it allows ARPA to collect and publish data every 10 minutes. ARPA also decided to freely publish all hydrological data on its web site (http://idro.arpalombardia.it). Since 2010 either real time data or historical long series have been made available to everyone over a webgis platform. Every day ARPA employs check if the network is working correctly and validate the data. The aim is to follow the whole process of data management from its collection on the field to its open publication; this requires a great daily effort from the people in charge of the network maintenance.

76 FR 6694 - Drawbridge Operation Regulation; Upper Mississippi River, Keokuk, IA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-02-08

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket Number USCG-2011-0029] Drawbridge Operation Regulation; Upper Mississippi River, Keokuk, IA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, Eighth Coast Guard District, has...

76 FR 19911 - Drawbridge Operation Regulations; Apponagansett River, Dartmouth, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-04-11

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-0203] Drawbridge Operation Regulations; Apponagansett River, Dartmouth, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has issued a...

Role of lake regulation on glacier-fed rivers in enhancing salmon productivity: the Cook Inlet watershed, south-central Alaska, USA

NASA Astrophysics Data System (ADS)

Dorava, Joseph M.; Milner, Alexander M.

2000-10-01

Rivers fed by glaciers constitute a major part of the freshwater runoff into the Cook Inlet basin of south-central Alaska. This basin is very important to the economy of the State of Alaska because it is home to more than half of the population and it supports multi-million dollar commercial, subsistence and sport fisheries. Hence an understanding of how glacial runoff influences biological productivity is important for managing rivers that drain into Cook Inlet. This paper examines the ways in which the regulation of glacier-fed rivers by proglacial lakes affects salmon productivity, with particular reference to the Kenai River. Salmon escapement per unit channel length on the Kenai River is between two and ten times that found for rain-and-snowmelt dominated rivers and glacier-fed rivers lacking lake regulation.Lakes are shown to influence biological processes in glacier-fed rivers by attenuating peak flows, sustaining high flows throughout the summer, supplementing winter low flows, settling suspended sediment, and increasing river temperatures. Downstream from large lakes, glacier-fed rivers are less disturbed, channels are relatively stable and have well-developed salmonid habitats. The positive influences are indicated by the high diversity and abundances of benthic macroinvertebrates, which are important food resources for juvenile salmonids. High summer flows allow access for up-river salmon runs and lakes also provide both overwintering and rearing habitat.

78 FR 28001 - In the Matter of Entergy Gulf States Louisiana, LLC., and Entergy Operations, Inc., River Bend...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-13

... the Director of the Office of Nuclear Reactor Regulation satisfactory documentary evidence that New... September 27, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12275A013), as...

Quantifying flood duration controls on chute cutoff formation in a wandering gravel-bed river

NASA Astrophysics Data System (ADS)

Sawyer, A.; Wilcox, A. C.

2014-12-01

Chute cutoffs, which occur when a bypass or "chute" channel incises across a point or braid bar, distribute water and sediment, regulate sinuosity, and create off-channel habitat in wandering gravel-bed rivers. Cutoffs have been hypothesized to occur by progressive migration preparing a bend for cutoff, after which overbank flow events provide a trigger to excavate new channels. This trigger may depend on the magnitude and duration of floods and their associated sediment fluxes. Here we investigated how overbank flow duration impacts cutoff formation in a wandering gravel-bed river. To explore this, we applied a two-dimensional hydrodynamic model to a recently reconstructed reach of the Clark Fork River in western Montana that experienced chute cutoffs during a long-duration flood event in 2011. Hydrographs exceeding bankfull and with varying durations were simulated to constrain the role of overbank flow duration on erosional work in chute cutoff channels. For each magnitude-frequency-duration combination, cumulative excess shear stress (i.e., above the threshold of sediment mobilization) was quantified for in-channel and overbank areas. Locations of shear stress divergence associated with morphological change were identified along chute pathways. Preliminary results suggest that overbank areas containing concentrated flowpaths such as swales follow cumulative excess shear stress curve patterns similar to in-channel areas. This work describes a dynamic system characteristic of wandering gravel-bed rivers in the Pacific Northwest, and has implications for understanding morphodynamic evolution, river restoration targeting off-channel habitat for fish, and geomorphic flow regime management in regulated rivers.

78 FR 25572 - Special Local Regulation; Wy-Hi Rowing Regatta, Trenton Channel; Detroit River, Wyandotte, MI

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-02

...-AA08 Special Local Regulation; Wy-Hi Rowing Regatta, Trenton Channel; Detroit River, Wyandotte, MI..., during, and immediately after the Wy-Hi Rowing Regatta. This special local regulation will establish... to read as follows: Sec. 100.T09-0287 Special Local Regulation; Wy-Hi Rowing Regatta, Wyandotte, MI...

76 FR 72308 - Drawbridge Operation Regulation; Upper Mississippi River, Dubuque, IA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-11-23

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-1039] Drawbridge Operation Regulation; Upper Mississippi River, Dubuque, IA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, Eighth Coast Guard District, has issued a...

76 FR 79066 - Drawbridge Operation Regulation; Upper Mississippi River, Clinton, IA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-12-21

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-1018] Drawbridge Operation Regulation; Upper Mississippi River, Clinton, IA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, Eighth Coast Guard District, has issued a...

75 FR 70817 - Drawbridge Operation Regulation; Upper Mississippi River, Dubuque, IA

Federal Register 2010, 2011, 2012, 2013, 2014

2010-11-19

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2010-1039] Drawbridge Operation Regulation; Upper Mississippi River, Dubuque, IA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, Eighth Coast Guard District, has issued a...

75 FR 65567 - Drawbridge Operation Regulations; Mystic River, Charlestown, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-26

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2010-0924] Drawbridge Operation Regulations; Mystic River, Charlestown, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has issued a temporary...

77 FR 6963 - Drawbridge Operation Regulations; Merrimack River, Amesbury, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-10

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2012-0006] Drawbridge Operation Regulations; Merrimack River, Amesbury, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has issued a temporary...

76 FR 3516 - Drawbridge Operation Regulations; Merrimack River, Newburyport and Salisbury, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-20

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2010-1134] Drawbridge Operation Regulations; Merrimack River, Newburyport and Salisbury, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has...

76 FR 64009 - Drawbridge Operation Regulation; Apponagansett River, Dartmouth, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-10-17

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-0335] RIN 1625-AA09 Drawbridge Operation Regulation; Apponagansett River, Dartmouth, MA AGENCY: Coast Guard, DHS. ACTION: Final rule. SUMMARY: The Coast Guard has changed the drawbridge operation regulations that govern...

77 FR 65619 - Drawbridge Operation Regulations; Taunton River, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-10-30

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2012-0895] Drawbridge Operation Regulations; Taunton River, MA AGENCY: Coast Guard, DHS. ACTION: Notice of deviation from drawbridge regulation; request for comments. SUMMARY: The Coast Guard has issued a temporary deviation from...

76 FR 14804 - Drawbridge Operation Regulations; Bass River, Beverly, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-18

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-0149] Drawbridge Operation Regulations; Bass River, Beverly, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has issued a temporary...

78 FR 35756 - Drawbridge Operation Regulations; Charles River, Boston, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-06-14

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [USCG-2013-0464] Drawbridge Operation Regulations; Charles River, Boston, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has issued a temporary [[Page 35757...

75 FR 62469 - Drawbridge Operation Regulations; Charles River, Boston, MA, Maintenance

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-12

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2010-0847] Drawbridge Operation Regulations; Charles River, Boston, MA, Maintenance AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has issued a...

77 FR 35843 - Drawbridge Operation Regulation; Umpqua River, Reedsport, OR

Federal Register 2010, 2011, 2012, 2013, 2014

2012-06-15

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2012-0534] Drawbridge Operation Regulation; Umpqua River, Reedsport, OR AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Coast Guard has issued a temporary deviation from the operating...

78 FR 18480 - Drawbridge Operation Regulations; Willamette River, Portland, OR

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-27

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2013-0154] Drawbridge Operation Regulations; Willamette River, Portland, OR AGENCY: Coast Guard, DHS. ACTION: Notice of deviation from drawbridge regulation. SUMMARY: The Coast Guard has issued a temporary deviation from the...

77 FR 45247 - Drawbridge Operation Regulations; Gallants Channel, Beaufort, NC

Federal Register 2010, 2011, 2012, 2013, 2014

2012-07-31

... to accommodate the Neuse River Keeper Foundation Sprint Triathlon. DATES: This deviation is effective... operating regulations to accommodate the Neuse River Keeper Foundation Sprint Triathlon. Under the current... designated time period. This deviation from the operating regulations is authorized under 33 CFR 117.35...

78 FR 71493 - Special Local Regulation; Lake Havasu City Christmas Boat Parade of Lights; Colorado River; Lake...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-11-29

...-AA00 Special Local Regulation; Lake Havasu City Christmas Boat Parade of Lights; Colorado River; Lake... Boat Parade of Lights on the Colorado River. This modification is necessary to reflect the actual dates... of Lights will involve fifty vessels in Lake Havasu, AZ transiting Thompson Bay, proceeding through...

78 FR 56607 - Drawbridge Operation Regulation; Hudson River, Troy and Green Island, NY

Federal Register 2010, 2011, 2012, 2013, 2014

2013-09-13

...-AA09 Drawbridge Operation Regulation; Hudson River, Troy and Green Island, NY AGENCY: Coast Guard, DHS... operation of the highway bridge across the Hudson River, mile 152.7, between Troy and Green Island, New York... Street Bridge, mile 155.4, between Troy and Cohoes which has been converted to a fixed bridge. It is...

75 FR 81125 - Drawbridge Operation Regulation; Upper Mississippi River, Rock Island, IL

Federal Register 2010, 2011, 2012, 2013, 2014

2010-12-27

... Operation Regulation; Upper Mississippi River, Rock Island, IL AGENCY: Coast Guard, DHS. ACTION: Notice of... the Upper Mississippi River, mile 481.4, at Rock Island, Illinois. The deviation is necessary to allow... Rock Island, Illinois to open on signal if at least 24 hours advance notice is given for 44 days from...

78 FR 48315 - Drawbridge Operation Regulation; Lewis and Clark River, Astoria, OR

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-08

... Operation Regulation; Lewis and Clark River, Astoria, OR AGENCY: Coast Guard, DHS. ACTION: Notice of... operating schedule that governs the Lewis and Clark Bridge which crosses the Lewis and Clark River, mile 1.0... Transportation has requested that the Lewis and Clark Drawbridge, mile 1.0, remain in the closed position and not...

33 CFR 207.170 - Federal Dam, Oklawaha River, Moss Bluff, Fla.; pool level.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 3 2011-07-01 2011-07-01 false Federal Dam, Oklawaha River, Moss..., DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE NAVIGATION REGULATIONS § 207.170 Federal Dam, Oklawaha River... high water, the discharge past the dam shall be regulated in such manner as he may direct until he...

33 CFR 207.170 - Federal Dam, Oklawaha River, Moss Bluff, Fla.; pool level.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Federal Dam, Oklawaha River, Moss..., DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE NAVIGATION REGULATIONS § 207.170 Federal Dam, Oklawaha River... high water, the discharge past the dam shall be regulated in such manner as he may direct until he...

78 FR 28139 - Drawbridge Operation Regulation; Tuckahoe River, Between Corbin City and Upper Township, NJ

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-14

... Operation Regulation; Tuckahoe River, Between Corbin City and Upper Township, NJ AGENCY: Coast Guard, DHS... River, mile 8.0, between Corbin City and Upper Township, NJ. The deviation is necessary to facilitate... operating schedule, the State Highway Bridge, mile 8.0, between Corbin City and Upper Township, NJ shall...

33 CFR 100.919 - International Bay City River Roar, Bay City, MI.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false International Bay City River Roar, Bay City, MI. 100.919 Section 100.919 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF... Bay City River Roar, Bay City, MI. (a) Regulated Area. A regulated area is established to include all...

33 CFR 100.919 - International Bay City River Roar, Bay City, MI.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false International Bay City River Roar, Bay City, MI. 100.919 Section 100.919 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF... Bay City River Roar, Bay City, MI. (a) Regulated Area. A regulated area is established to include all...

Application of the ELOHA framework to regulated rivers in the upper Tennessee River Basin: A case study

Treesearch

Ryan A. McManamay; Donald J. Orth; Charles A. Dolloff; David C. Mathews

2013-01-01

In order for habitat restoration in regulated rivers to be effective at large scales, broadly applicable frameworks are needed that provide measurable objectives and contexts for management. The Ecological Limits of Hydrologic Alteration (ELOHA) framework was created as a template to assess hydrologic alterations, develop relationships between altered streamflow and...

75 FR 67216 - Regulated Navigation Area; Greenville Bridge Demolition, Lower Mississippi River Mile 531.3, AR, MS

Federal Register 2010, 2011, 2012, 2013, 2014

2010-11-02

... Regulated Navigation Area; Greenville Bridge Demolition, Lower Mississippi River Mile 531.3, AR, MS AGENCY... permitted to be in this area at certain times during the demolition of the Greenville Bridge, Lower... safety hazards during the demolition of the Greenville Bridge, Lower Mississippi River Mile 531.3. DATES...

Geomorphic and vegetation changes in a meandering dryland river regulated by a large dam, Sauce Grande River, Argentina

NASA Astrophysics Data System (ADS)

Casado, Ana; Peiry, Jean-Luc; Campo, Alicia M.

2016-09-01

This paper investigates post-dam geomorphic and vegetation changes in the Sauce Grande River, a meandering dryland river impounded by a large water-conservation dam. As the dam impounds a river section with scarce influence of tributaries, sources for fresh water and sediment downstream are limited. Changes were inspected based on (i) analysis of historical photographs/imagery spanning pre- (1961) and post-dam (1981, 2004) channel conditions for two river segments located above and below the dam, and (ii) field survey of present channel conditions for a set of eight reference reaches along the river segments. Whilst the unregulated river exhibited active lateral migration with consequent adjustments of the channel shape and size, the river section below the dam was characterized by (i) marked planform stability (93 to 97%), and by (ii) vegetation encroachment leading to alternating yet localized contraction of the channel width (up to 30%). The present river displays a moribund, stable channel where (i) redistribution of sediment along the river course no longer occurs and (ii) channel forms constitute a remnant of a fluvial environment created before closing the dam, under conditions of higher energy. In addition to providing new information on the complex geomorphic response of dryland rivers to impoundment, this paper represents the very first geomorphic assessment of the regulated Sauce Grande and therefore provides an important platform to underpin further research assessing the geomorphic state of this highly regulated dryland river.

77 FR 58491 - Drawbridge Operation Regulation; Old River, Orwood, CA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-09-21

... regulation that governs the Burlington Northern & Santa Fe Railroad (BNSF) Drawbridge across Old River, mile... Renee V. Wright, Program Manager, Docket Operations, telephone 202-366-9826. SUPPLEMENTARY INFORMATION...

Role of lake regulation on glacier fed rivers in enhancing salmon productivity: The Cook Inlet watershed south central Alaska, USA

USGS Publications Warehouse

Hupp, C.R.

2000-01-01

Rivers fed by glaciers constitute a major part of the freshwater runoff into the Cook Inlet basin of south-central Alaska. This basin is very important to the economy of the State of Alaska because it is home to more than half of the population and it supports multi-million dollar commercial, subsistence and sport fisheries. Hence an understanding of how glacial runoff influences biological productivity is important for managing rivers that drain into Cook Inlet. This paper examines the ways in which the regulation of glacier-fed rivers by proglacial lakes affects salmon productivity, with particular reference to the Kenai River. Salmon escapement per unit channel length on the Kenai River is between two and ten times that found for rain-and-snowmelt dominated rivers and glacier-fed rivers lacking lake regulation. Lakes are shown to influence biological processes in glacier-fed rivers by attenuating peak flows, sustaining high flows throughout the summer, supplementing winter low flows, settling suspended sediment, and increasing river temperatures. Downstream from large lakes, glacier-fed rivers are less disturbed, channels are relatively stable and have well-developed salmonid habitats. The positive influences are indicated by the high diversity and abundances of benthic macroinvertebrates, which are important food resources for juvenile salmonids. High summer flows allow access for up-river salmon runs and lakes also provide both overwintering and rearing habitat. Copyright ?? 2000 John Wiley & Sons, Ltd.Rivers fed by glaciers constitute a major part of the freshwater runoff into the Cook Inlet basin of south-central Alaska. This basin is very important to the economy of the State of Alaska because it is home to more than half of the population and it supports multi-million dollar commercial, subsistence and sport fisheries. Hence an understanding of how glacial runoff influences biological productivity is important for managing rivers that drain into Cook Inlet. This paper examines the ways in which the regulation of glacier-fed rivers by proglacial lakes affects salmon productivity, with particular reference to the Kenai River. Salmon escapement per unit channel length on the Kenai River is between two and ten times that found for rain-and-snowmelt dominated rivers and glacier-fed rivers lacking lake regulation. Lakes are shown to influence biological processes in glacier-fed rivers by attenuating peak flows, sustaining high flows throughout the summer, supplementing winter low flows, settling suspended sediment, and increasing river temperatures. Downstream from large lakes, glacier-fed rivers are less disturbed, channels are relatively stable and have well-developed salmonid habitats. The positive influences are indicated by the high diversity and abundances of benthic macroinvertebrates, which are important food resources for juvenile salmonids. High summer flows allow access for up-river salmon runs and lakes also provide both overwintering and rearing habitat.

Reconciling Environmental and Flood Control Goals on an Arid-Zone River: Case Study of the Limitrophe Region of the Lower Colorado River in the United States and Mexico

NASA Astrophysics Data System (ADS)

Glenn, Edward P.; Hucklebridge, Kate; Hinojosa-Huerta, Osvel; Nagler, Pamela L.; Pitt, Jennifer

2008-03-01

Arid zone rivers have highly variable flow rates, and flood control projects are needed to protect adjacent property from flood damage. On the other hand, riparian corridors provide important wildlife habitat, especially for birds, and riparian vegetation is adapted to the natural variability in flows on these rivers. While environmental and flood control goals might appear to be at odds, we show that both goals can be accommodated in the Limitrophe Region (the shared border between the United States and Mexico) on the Lower Colorado River. In 1999, the International Boundary and Water Commission proposed a routine maintenance project to clear vegetation and create a pilot channel within the Limitrophe Region to improve flow capacity and delineate the border. In 2000, however, Minute 306 to the international water treaty was adopted, which calls for consideration of environmental effects of IBWC actions. We conducted vegetation and bird surveys within the Limitrophe and found that this river segment is unusually rich in native cottonwood and willow trees, marsh habitat, and resident and migratory birds compared to flow-regulated segments of river. A flood-frequency analysis showed that the existing levee system can easily contain a 100 year flood even if vegetation is not removed, and the existing braided channel system has greater carrying capacity than the proposed pilot channel.

Reconciling environmental and flood control goals on an arid-zone river: case study of the limitrophe region of the lower colorado river in the United States and Mexico.

PubMed

Glenn, Edward P; Hucklebridge, Kate; Hinojosa-Huerta, Osvel; Nagler, Pamela L; Pitt, Jennifer

2008-03-01

Arid zone rivers have highly variable flow rates, and flood control projects are needed to protect adjacent property from flood damage. On the other hand, riparian corridors provide important wildlife habitat, especially for birds, and riparian vegetation is adapted to the natural variability in flows on these rivers. While environmental and flood control goals might appear to be at odds, we show that both goals can be accommodated in the Limitrophe Region (the shared border between the United States and Mexico) on the Lower Colorado River. In 1999, the International Boundary and Water Commission proposed a routine maintenance project to clear vegetation and create a pilot channel within the Limitrophe Region to improve flow capacity and delineate the border. In 2000, however, Minute 306 to the international water treaty was adopted, which calls for consideration of environmental effects of IBWC actions. We conducted vegetation and bird surveys within the Limitrophe and found that this river segment is unusually rich in native cottonwood and willow trees, marsh habitat, and resident and migratory birds compared to flow-regulated segments of river. A flood-frequency analysis showed that the existing levee system can easily contain a 100 year flood even if vegetation is not removed, and the existing braided channel system has greater carrying capacity than the proposed pilot channel.

78 FR 76750 - Drawbridge Operation Regulation; Upper Mississippi River, Clinton, IA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-12-19

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2013-1008] Drawbridge Operation Regulation; Upper Mississippi River, Clinton, IA AGENCY: Coast Guard, DHS. ACTION: Notice of deviation from drawbridge regulations. SUMMARY: The Coast Guard has issued a temporary deviation from the...

77 FR 69761 - Drawbridge Operation Regulation; Upper Mississippi River, Clinton, IA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-11-21

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2012-0995] Drawbridge Operation Regulation; Upper Mississippi River, Clinton, IA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Coast Guard has issued a temporary deviation from the...

78 FR 72022 - Drawbridge Operation Regulation; Upper Mississippi River, Dubuque, IA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-12-02

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2013-0964] Drawbridge Operation Regulation; Upper Mississippi River, Dubuque, IA AGENCY: Coast Guard, DHS. ACTION: Notice of deviation from drawbridge regulation. SUMMARY: The Coast Guard has issued a temporary deviation from the...

77 FR 69759 - Drawbridge Operation Regulation; Upper Mississippi River, Dubuque, IA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-11-21

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2012-1002] Drawbridge Operation Regulation; Upper Mississippi River, Dubuque, IA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Coast Guard has issued a temporary deviation from the...

78 FR 18849 - Drawbridge Operation Regulations; Saugus River, Saugus and Lynn, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-28

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2013-0176] Drawbridge Operation Regulations; Saugus River, Saugus and Lynn, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Coast Guard has issued a temporary deviation from the...

77 FR 34797 - Drawbridge Operation Regulations; Chelsea River, Chelsea and East Boston, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-06-12

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [USCG-2012-0396] Drawbridge Operation Regulations; Chelsea River, Chelsea and East Boston, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has issued a temporary...

76 FR 79065 - Drawbridge Operation Regulations; Annisquam River and Blynman Canal, Gloucester, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-12-21

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-1099] Drawbridge Operation Regulations; Annisquam River and Blynman Canal, Gloucester, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has...

76 FR 45420 - Drawbridge Operation Regulations; Annisquam River and Blynman Canal, Gloucester, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-07-29

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-0617] Drawbridge Operation Regulations; Annisquam River and Blynman Canal, Gloucester, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has...

78 FR 29646 - Drawbridge Operation Regulations; Merrimack River, Haverhill and West Newbury, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-21

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2013-0356] Drawbridge Operation Regulations; Merrimack River, Haverhill and West Newbury, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has...

77 FR 37317 - Drawbridge Operation Regulations; Merrimack River, Haverhill and West Newbury, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-06-21

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2012-0517] Drawbridge Operation Regulations; Merrimack River, Haverhill and West Newbury, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has...

77 FR 6012 - Drawbridge Operation Regulations; Annisquam River and Blynman Canal, Gloucester, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-07

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2012-0034] Drawbridge Operation Regulations; Annisquam River and Blynman Canal, Gloucester, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has...

76 FR 73510 - Drawbridge Operation Regulations; Saugus River, Lynn and Revere, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-11-29

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-1034] Drawbridge Operation Regulations; Saugus River, Lynn and Revere, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has issued a...

78 FR 65874 - Drawbridge Operation Regulations; Mystic River, Charlestown and Everett, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-11-04

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2013-0889] Drawbridge Operation Regulations; Mystic River, Charlestown and Everett, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has issued a...

76 FR 14804 - Drawbridge Operation Regulations; Annisquam River and Blynman Canal, Gloucester, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-18

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-0150] Drawbridge Operation Regulations; Annisquam River and Blynman Canal, Gloucester, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has...

76 FR 4817 - Drawbridge Operation Regulations; Chelsea River, Chelsea and East Boston, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-27

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-0009] Drawbridge Operation Regulations; Chelsea River, Chelsea and East Boston, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from regulations. SUMMARY: The Commander, First Coast Guard District, has...

7 CFR 905.16 - Regulation Area II.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 7 Agriculture 8 2010-01-01 2010-01-01 false Regulation Area II. 905.16 Section 905.16 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements... the St. Johns River; thence along the main channel of the St. Johns River and through Lake Harney...

77 FR 74586 - Drawbridge Operation Regulation; Elizabeth River, Eastern Branch, Norfolk, VA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-12-17

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2012-1052] Drawbridge Operation Regulation; Elizabeth River, Eastern Branch, Norfolk, VA AGENCY: Coast Guard, DHS. ACTION: Notice...-2012-1052 and are available online at www.regulations.gov , inserting USCG-2012-1052 in the ``Search...

33 CFR 165.T01-0394 - Regulated Navigation Area; Waldo-Hancock Bridge Demolition, Penobscot River, between Prospect and...

Code of Federal Regulations, 2013 CFR

2013-07-01

... a Regulated Navigation Area (RNA): All navigable waters of Penobscot River between Prospect, ME and...) Regulations. (1) The general regulations contained in 33 CFR 165.10, 165.11, and 165.13 apply within the RNA... New England. (3) Persons and vessels may request permission to enter the RNA during periods of...

Development and Application of a Process-based River System Model at a Continental Scale

NASA Astrophysics Data System (ADS)

Kim, S. S. H.; Dutta, D.; Vaze, J.; Hughes, J. D.; Yang, A.; Teng, J.

2014-12-01

Existing global and continental scale river models, mainly designed for integrating with global climate model, are of very course spatial resolutions and they lack many important hydrological processes, such as overbank flow, irrigation diversion, groundwater seepage/recharge, which operate at a much finer resolution. Thus, these models are not suitable for producing streamflow forecast at fine spatial resolution and water accounts at sub-catchment levels, which are important for water resources planning and management at regional and national scale. A large-scale river system model has been developed and implemented for water accounting in Australia as part of the Water Information Research and Development Alliance between Australia's Bureau of Meteorology (BoM) and CSIRO. The model, developed using node-link architecture, includes all major hydrological processes, anthropogenic water utilisation and storage routing that influence the streamflow in both regulated and unregulated river systems. It includes an irrigation model to compute water diversion for irrigation use and associated fluxes and stores and a storage-based floodplain inundation model to compute overbank flow from river to floodplain and associated floodplain fluxes and stores. An auto-calibration tool has been built within the modelling system to automatically calibrate the model in large river systems using Shuffled Complex Evolution optimiser and user-defined objective functions. The auto-calibration tool makes the model computationally efficient and practical for large basin applications. The model has been implemented in several large basins in Australia including the Murray-Darling Basin, covering more than 2 million km2. The results of calibration and validation of the model shows highly satisfactory performance. The model has been operalisationalised in BoM for producing various fluxes and stores for national water accounting. This paper introduces this newly developed river system model describing the conceptual hydrological framework, methods used for representing different hydrological processes in the model and the results and evaluation of the model performance. The operational implementation of the model for water accounting is discussed.

Channel changes in the Jarama and Tagus rivers (central Spain) over the past 500 years

NASA Astrophysics Data System (ADS)

Uribelarrea, D.; Pérez-González, A.; Benito, G.

2003-10-01

Long-term channel changes of the Tagus and the Jarama Rivers in central Spain were studied in relation to variations in hydroclimatic factors, such as rainfall and flooding, and also with respect to human activities undertaken in their valleys. Data were taken from historical (1580-1823) and topographical (1877-1988) maps, as well as aerial photographs (1945-1999). The available hydroclimatic data consists of a series of monthly rainfall totals (1859-1994) and mean river flow values recorded at gauging stations (1911-1985). In addition, a historical flood record (1550-1947) was produced from documentary sources. Some of the data was incorporated into a geographical information system (GIS) to quantify the changes in the course of the rivers. The results show there have been two distinct periods: before and after human intervention in the river system, which took place around 1950. During the earlier period (1550-1950), a correlation exists between climate, frequency and magnitude of flooding and changes in fluvial geomorphology. Between 1860 and 1892 an increase in flood frequency and magnitude occurred, which produced half of the cut-offs recorded in the study area between 1823 and 1877. The meanders length ( L), width ( W) and radius of curvature (RC) of the Tagus River have decreased since 1750. However, those of the Jarama reached their maximum values during flood periods. Both rivers have different geomorphological responses during flood events, which can explain these different trends. Floods in the Jarama not only led to the cut-offs, but also enlarged the channel size ( L, W and RC). In the second period (1956—present), flow regulation via dams and gravel mining modified the system completely and impeded the natural development of these rivers.

Using a conceptual model to assess the role of flow regulation in the hydromorphological evolution of riparian corridors

NASA Astrophysics Data System (ADS)

Martínez-Fernández, Vanesa; Gonzalez del Tánago, Marta; García de Jalón, diego

2017-04-01

Riparian corridors result from active vegetation-fluvial interactions, which are highly dependent on flow regime conditions and sediment dynamics. Colonization, establishment and survival of species are constrained by fluvial processes which vary according to topographic and sedimentological complexity of the corridor. In order to manage these dynamic and complex riparian systems there is a need for practical tools based on conceptual models. The objective of this study was to apply the conceptual model of riparian corridors lateral zonation in response to the dominant fluvial processes established by Gurnell et al. (2015) and verify its usefulness as a tool for assessing the effect of flow regulation. Two gravel rivers have been selected for this purpose from the north of Spain, the Porma River regulated by Boñar large dam and the unregulated Curueño River. The historical series of flows and the aerial photographs of 1956 and 2011 on which the river corridor has been delimited have been analyzed and identified the permanent inundated zone (1) and four areas of riparian vegetation dominated respectively by fluvial disturbance with coarse sediment erosion and deposition (zone 2), fluvial disturbance with finer sediment deposition (zone 3), inundation (zone 4) and soil moisture regime (zone 5). Likewise, a two-dimensional hydraulic simulation was performed with avenues of different return periods and calculated the prevailing hydraulic conditions (depths, velocities and drag forces) to characterize each of the vegetation zones mentioned in both rivers. The results show that the most active zone 2 (fluvial disturbance dominated showing coarse sediment erosion and deposition) disappears due to the regulation of flows and vegetation encroachment, while the riparian corridor is dominated by the less active zone where the vegetation is maintained by the humidity of sporadic floods and underground runoff. Moreover, by means of the hydraulic simulation we have found a close relationship between the different areas of fluvial processes recognized through its vegetation and hydraulic conditions, which predicts the expected evolution of vegetation at different scenarios of regulation.

High flow and riparian vegetation along the San Miguel River, Colorado

USGS Publications Warehouse

Friedman, J.M.; Auble, G.T.

2000-01-01

Riparian ecosystems are characterized by abundance of water and frequent flow related disturbance. River regulation typically decreases peak flows, reducing the amount of disturbance and altering the vegetation. The San Miguel River is one of the last relatively unregulated rivers remaining in the Colorado River Watershed. One goal of major landowners along the San Miguel including the Bureau of Land Management and The Nature Conservancy is to maintain their lands in a natural condition. Conservation of an entire river corridor requires an integrated understanding of the variability in ecosystems and external influences along the river. Therefore, the Bureau of Land Management and others have fostered a series of studies designed to catalogue that variability, and to characterize the processes that maintain the river as a whole. In addition to providing information useful to managers, these studies present a rare opportunity to investigate how a Colorado river operates in the absence of regulation.

Accumulated state assessment of the Peace-Athabasca-Slave River system.

PubMed

Dubé, Monique G; Wilson, Julie E

2013-07-01

Effects-based analysis is a fundamental component of watershed cumulative effects assessment. This study conducted an effects-based analysis for the Peace-Athabasca-Slave River System, part of the massive Mackenzie River Basin, encompassing 20% of Canada's total land mass and influenced by cumulative contributions of the W.A.C. Bennett Dam (Peace River) and industrial activities including oil sands mining (Athabasca River). This study assessed seasonal changes in 1) Peace River water quality and quantity before and after dam development, 2) Athabasca River water quality and quantity before and after oil sands developments, 3) tributary inputs from the Peace and Athabasca Rivers to the Slave River, and 4) upstream to downstream differences in water quality in the Slave River. In addition, seasonal benchmarks were calculated for each river based on pre-perturbation post-perturbation data for future cumulative effects assessments. Winter discharge (January-March) from the Peace and Slave Rivers was significantly higher than before dam construction (pre-1967) (p < 0.05), whereas summer peak flows (May-July) were significantly lower than before the dam showing that regulation has significantly altered seasonal flow regimes. During spring freshet and summer high flows, the Peace River strongly influenced the quality of the Slave River, as there were no significant differences in loadings of dissolved N, total P (TP), total organic C (TOC), total As, total Mn, total V, and turbidity and specific conductance between these rivers. In the Athabasca River, TP and specific conductance concentrations increased significantly since before oil sands developments (1967-2010), whereas dissolved N and sulfate have increased after the oil sands developments (1977-2010). Recently, the Athabasca River had significantly higher concentrations of dissolved N, TP, TOC, dissolved sulfate, specific conductance, and total Mn than either the Slave or the Peace Rivers during the winter months. The transboundary nature of the Peace, Athabasca, and Slave River basins has resulted in fragmented monitoring and reporting of the state of these rivers, and a more consistent monitoring framework is recommended. Copyright © 2012 SETAC.

Key issues for determining the exploitable water resources in a Mediterranean river basin.

PubMed

Pedro-Monzonís, María; Ferrer, Javier; Solera, Abel; Estrela, Teodoro; Paredes-Arquiola, Javier

2015-01-15

One of the major difficulties in water planning is to determine the water availability in a water resource system in order to distribute water sustainably. In this paper, we analyze the key issues for determining the exploitable water resources as an indicator of water availability in a Mediterranean river basin. Historically, these territories are characterized by heavily regulated water resources and the extensive use of unconventional resources (desalination and wastewater reuse); hence, emulating the hydrological cycle is not enough. This analysis considers the Jucar River Basin as a case study. We have analyzed the different possible combinations between the streamflow time series, the length of the simulation period and the reliability criteria. As expected, the results show a wide dispersion, proving the great influence of the reliability criteria used for the quantification and localization of the exploitable water resources in the system. Therefore, it is considered risky to provide a single value to represent the water availability in the Jucar water resource system. In this sense, it is necessary that policymakers and stakeholders make a decision about the methodology used to determine the exploitable water resources in a river basin. Copyright © 2014 Elsevier B.V. All rights reserved.

75 FR 29889 - Special Local Regulation for Marine Event; 2010 International Cup Regatta, Pasquotank River...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-05-28

...-AA08 Special Local Regulation for Marine Event; 2010 International Cup Regatta, Pasquotank River... traffic in a portion of the Pasquotank River, near Elizabeth City, NC, during the 2010 International Cup... event in 33 CFR 100.501 and 33 CFR Table to Sec. 100.501, No. 54. On June 5 and 6, 2010, Carolina Cup...

Impact of flow regulation and power plant effluents on the flow and temperature regimes of the Chattahoochee River; Atlanta to Whitesburg, Georgia

USGS Publications Warehouse

Faye, Robert E.; Jobson, Harvey E.; Land, Larry F.

1978-01-01

A calibrated and verified transient-flow temperature model was used to evaluate the effects of flow regulation and powerplant loadings on the natural temperature regime of the Chattahoochee River in northeast Georgia. Estimates were made of both instantaneous and average natural temperatures in the river during an 8-day period in August 1976. Differences between the computed average natural temperature and an independent estimateof natural temperature based on observed equilibrium temperatures were less than 0.5C. The combined thermal effects of flow regulation and powerplant effluents resulted in mean daily river temperatures downstreams of the powerplants about equal to or less than computed mean natural temperatures. The range and rates of change of computed natural diurnal temperature fluctuations were considerably less than those presently observed (1976) in the river. Except during periods of peak water-supply demand, differences between computed year 2000 river temperatures and observed present-day temperatures were less than 2C. (Woodard-USGS)

50 CFR 300.92 - Relation to other laws.

Code of Federal Regulations, 2010 CFR

2010-10-01

... REGULATIONS Fraser River Sockeye and Pink Salmon Fisheries § 300.92 Relation to other laws. (a) Insofar as.... Federal regulations governing salmon fishing in the EEZ, which includes a portion of the Fraser River...

50 CFR 300.92 - Relation to other laws.

Code of Federal Regulations, 2011 CFR

2011-10-01

... REGULATIONS Fraser River Sockeye and Pink Salmon Fisheries § 300.92 Relation to other laws. (a) Insofar as.... Federal regulations governing salmon fishing in the EEZ, which includes a portion of the Fraser River...

18 CFR 1304.412 - Definitions.

Code of Federal Regulations, 2011 CFR

2011-04-01

... CONSTRUCTION IN THE TENNESSEE RIVER SYSTEM AND REGULATION OF STRUCTURES AND OTHER ALTERATIONS Miscellaneous... targeted elevation to which TVA plans to fill each reservoir during its annual operating cycle. Applicants... summer pool elevation for the reservoir in question at the time the application is submitted. Land-based...

18 CFR 1304.412 - Definitions.

Code of Federal Regulations, 2010 CFR

2010-04-01

... CONSTRUCTION IN THE TENNESSEE RIVER SYSTEM AND REGULATION OF STRUCTURES AND OTHER ALTERATIONS Miscellaneous... targeted elevation to which TVA plans to fill each reservoir during its annual operating cycle. Applicants... summer pool elevation for the reservoir in question at the time the application is submitted. Land-based...

[Study on control and management for industrial volatile organic compounds (VOCs) in China].

PubMed

Wang, Hai-Lin; Zhang, Guo-Ning; Nei, Lei; Wang, Yu-Fei; Hao, Zheng-Ping

2011-12-01

Volatile organic compounds (VOCs) emitted from industrial sources account for a large percent of total anthropogenic VOCs. In this paper, VOCs emission characterization, control technologies and management were discussed. VOCs from industrial emissions were characterized by high intensity, wide range and uneven distribution, which focused on Bejing-Tianjin Joint Belt, Shangdong Peninsula, Yangtze River Delta and the Pearl River Delta. The current technologies for VOCs treatment include adsorption, catalytic combustion, bio-degradation and others, which were applied in petrochemical, oil vapor recovery, shipbuilding, printing, pharmaceutical, feather manufacturing and so on. The scarcity of related regulations/standards plus ineffective supervision make the VOCs management difficult. Therefore, it is suggested that VOCs treatment be firstly performed from key areas and industries, and then carried out step by step. By establishing of actual reducing amount control system and more detailed VOCs emission standards and regulations, applying practical technologies together with demonstration projects, and setting up VOCs emission registration and classification-related-charge system, VOCs could be reduced effectively.

Defining biophysical reference conditions for dynamics river systems: an Alaskan example

NASA Astrophysics Data System (ADS)

Pess, G. R.

2008-12-01

Defining reference conditions for dynamic river ecosystems is difficult for two reasons. First long-term, persistent anthropogenic influences such as land development, harvest of biological resources, and invasive species have resulted in degraded, reduced, and simplified ecological communities and associated habitats. Second, river systems that have not been altered through human disturbance rarely have a long-term dataset on ecological conditions. However there are exceptions which can help us define the dynamic nature of river ecosystems. One large-scale exception is the Wood River system in Bristol Bay, Alaska, where habitat and salmon populations have not been altered by anthropogenic influences such as land development, hatchery production, and invasive species. In addition, the one major anthropogenic disturbance, salmon (Oncorhynchus spp.) harvest, has been quantified and regulated since its inception. First, we examined the variation in watershed and stream habitat characteristics across the Wood River system. We then compared these stream habitat characteristics with data that was collected in the 1950s. Lastly, we examined the correlation between pink (Oncorhynchus gorbuscha), chum (O. keta), and Chinook (O. tshawytscha), and sockeye salmon (O. nerka), and habitat characteristics in the Wood River system using four decades of data on salmon. We found that specific habitat attributes such as stream channel wetted width, depth, cover type, and the proportion of spawnable area were similar to data collected in the 1950s. Greater stream habitat variation occurred among streams than over time. Salmon occurrence and abundance, however was more temporal and spatially variable. The occurrence of pink and chum salmon increased from the 1970's to the present in the Wood River system, while sockeye abundance has fluctuated with changes in ocean conditions. Pink, Chinook and chum salmon ranged from non-existent to episodic to abundantly perennial, while sockeye dominated all streams in the Wood River system. One main trend was the frequency of occurrence and abundance of pink, Chinook, and chum salmon increased with watershed drainage area and stream depth and, to a lesser extent, decreased with sockeye salmon density. Conversely, sockeye salmon densities decreased with watershed drainage area and stream depth. Wood river habitat was temporally stable and spatially variable, thus identifying the suite of stream channel types that occur and identifying reference states for each is critical to capture reference conditions. Wood River biological reference states need to be established over a longer time frame than physical attributes because of the large-scale temporal variability that is forced by climatic conditions and larger scale spatially- explicit trends. Thus biological reference states for the Wood River system need to be defined with multiple streams, similar to developing reference states for different stream channel types, in order to capture the range of biological variability.

75 FR 41789 - Special Local Regulations for Marine Events; Patuxent River, Solomons, MD

Federal Register 2010, 2011, 2012, 2013, 2014

2010-07-19

...-AA08 Special Local Regulations for Marine Events; Patuxent River, Solomons, MD AGENCY: Coast Guard, DHS... proposed special local regulations for the ``Chesapeake Challenge'' power boat races, a marine event to be... proposal adds an additional date to the ``Chesapeake Challenge'' power boat racing on October 3, 2010...

76 FR 79066 - Drawbridge Operation Regulation; Escatawpa River, Moss Point, MS

Federal Register 2010, 2011, 2012, 2013, 2014

2011-12-21

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-1082] Drawbridge Operation Regulation; Escatawpa River, Moss Point, MS AGENCY: Coast Guard, DHS. ACTION: Notice of temporary...-2011-1082 and are available online by going to http://www.regulations.gov , inserting USCG-2011-1082 in...

78 FR 58985 - Proposed Amendments to the Water Quality Regulations, Water Code and Comprehensive Plan To Update...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-09-25

... DELAWARE RIVER BASIN COMMISSION 18 CFR Part 410 Proposed Amendments to the Water Quality Regulations, Water Code and Comprehensive Plan To Update Water Quality Criteria for pH AGENCY: Delaware River... public hearing to receive comments on proposed amendments to the Commission's Water Quality Regulations...

78 FR 24063 - Special Local Regulation; Hebda Cup Rowing Regatta, Trenton Channel; Detroit River, Wyandotte, MI

Federal Register 2010, 2011, 2012, 2013, 2014

2013-04-24

...-AA08 Special Local Regulation; Hebda Cup Rowing Regatta, Trenton Channel; Detroit River, Wyandotte, MI..., during, and immediately after the Hebda Cup Rowing Regatta. This special local regulation will establish... this boat race. It is also unnecessary to solicit public comments because the Hebda Cup Rowing Regatta...

75 FR 21191 - Special Local Regulation; Detroit APBA Gold Cup, Detroit River, Detroit, MI

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-23

...-AA08 Special Local Regulation; Detroit APBA Gold Cup, Detroit River, Detroit, MI AGENCY: Coast Guard... the Detroit APBA Gold Cup. This special local regulation is necessary to protect spectators and... race in conjunction with the Detroit APBA Gold Cup. The powerboat race and associated testing will...

33 CFR 165.756 - Regulated Navigation Area; Savannah River, Georgia.

Code of Federal Regulations, 2013 CFR

2013-07-01

....756 Regulated Navigation Area; Savannah River, Georgia. (a) Regulated Navigation Area (RNA). The... as a method of operation by which a towing vessel generates towline forces by thrust alone at an... presumed to be heel. Indirect mode means a towing technique defined as a method of operation by which an...

33 CFR 165.756 - Regulated Navigation Area; Savannah River, Georgia.

Code of Federal Regulations, 2012 CFR

2012-07-01

....756 Regulated Navigation Area; Savannah River, Georgia. (a) Regulated Navigation Area (RNA). The... as a method of operation by which a towing vessel generates towline forces by thrust alone at an... presumed to be heel. Indirect mode means a towing technique defined as a method of operation by which an...

33 CFR 165.756 - Regulated Navigation Area; Savannah River, Georgia.

Code of Federal Regulations, 2010 CFR

2010-07-01

....756 Regulated Navigation Area; Savannah River, Georgia. (a) Regulated Navigation Area (RNA). The... as a method of operation by which a towing vessel generates towline forces by thrust alone at an... presumed to be heel. Indirect mode means a towing technique defined as a method of operation by which an...

33 CFR 165.756 - Regulated Navigation Area; Savannah River, Georgia.

Code of Federal Regulations, 2011 CFR

2011-07-01

....756 Regulated Navigation Area; Savannah River, Georgia. (a) Regulated Navigation Area (RNA). The... as a method of operation by which a towing vessel generates towline forces by thrust alone at an... presumed to be heel. Indirect mode means a towing technique defined as a method of operation by which an...

33 CFR 165.756 - Regulated Navigation Area; Savannah River, Georgia.

Code of Federal Regulations, 2014 CFR

2014-07-01

....756 Regulated Navigation Area; Savannah River, Georgia. (a) Regulated Navigation Area (RNA). The... as a method of operation by which a towing vessel generates towline forces by thrust alone at an... presumed to be heel. Indirect mode means a towing technique defined as a method of operation by which an...

Restoring ecological integrity of great rivers: Historical hydrographs aid in defining reference conditions for the Missouri River

USGS Publications Warehouse

Galat, D.L.; Lipkin, R.

2000-01-01

Restoring the ecological integrity of regulated large rivers necessitates characterizing the natural flow regime. We applied 'Indicators of Hydrologic Alteration' to assess the natural range of variation of the Missouri River's flow regime at 11 locations before (1929-1948) and after (1967-1996) mainstem impoundment. The 3768 km long Missouri River was divided into three sections: upper basin least-altered from flow regulation, including the lower Yellowstone River; middle basin inter-reservoir, and lower basin channelized. Flow regulation was associated with a reduction in magnitude and duration of the annual flood pulse, an increase in magnitude and duration of annual discharge minima, a reduction in frequency of annual low-flow pulses, earlier timing of March-October low-flow pulses, and a general increase in frequency of flow reversals with a reduction in the rate of change in river flows. Hydrologic alterations were smallest at two least-altered upper-basin sites and most frequent and severe in inter-reservoir and upper-channelized river sections. The influence of reservoir operations on depressing the annual flood pulse was partially offset by tributary inflow in the lower 600 km of river. Reservoir operations could be modified to more closely approximate the 1929-1948 flow regime to establish a simulated natural riverine ecosystem. For inter-reservoir and upper channelized-river sections, we recommend periodic controlled flooding through managed reservoir releases during June and July; increased magnitude, frequency and duration of annual high-flow pulses; and increased annual rates of hydrograph rises and falls. All of the regulated Missouri River would benefit from reduced reservoir discharges during August-February, modified timing of reservoir releases and a reduced number of annual hydrograph reversals. Assessment of ecological responses to a reregulation of Missouri River flows that more closely approximates the natural flow regime should then be used in an adaptive fashion to further adjust reservoir operations.

Broadening the regulated-river management paradigm: A case study of the forgotten dead zone hindering Pallid Sturgeon recovery

USGS Publications Warehouse

Guy, Christopher S.; Treanor, Hilary B.; Kappenman, Kevin M.; Scholl, Eric A.; Ilgen, Jason E.; Webb, Molly A. H.

2015-01-01

The global proliferation of dams within the last half century has prompted ecologists to understand the effects of regulated rivers on large-river fishes. Currently, much of the effort to mitigate the influence of dams on large-river fishes has been focused on downriver effects, and little attention has been given to upriver effects. Through a combination of field observations and laboratory experiments, we tested the hypothesis that abiotic conditions upriver of the dam are the mechanism for the lack of recruitment in Pallid Sturgeon (Scaphirhynchus albus), an iconic large-river endangered species. Here we show for the first time that anoxic upriver habitat in reservoirs (i.e., the transition zone between the river and reservoir) is responsible for the lack of recruitment in Pallid Sturgeon. The anoxic condition in the transition zone is a function of reduced river velocities and the concentration of fine particulate organic material with high microbial respiration. As predicted, the river upstream of the transition zone was oxic at all sampling locations. Our results indicate that transition zones are an ecological sink for Pallid Sturgeon. We argue that ecologists, engineers, and policy makers need to broaden the regulated-river paradigm to consider upriver and downriver effects of dams equally to comprehensively mitigate altered ecosystems for the benefit of large-river fishes, especially for the Pallid Sturgeon.

Streamflow model of Wisconsin River for estimating flood frequency and volume

USGS Publications Warehouse

Krug, William R.; House, Leo B.

1980-01-01

The 100-year flood peak at Wisconsin Dells, computed from the simulated, regulated streamflow data for the period 1915-76, is 82,000 cubic feet per second, including the effects of all the reservoirs in the river system, as they are currently operated. It also includes the effects of Lakes Du Bay, Petenwell, and Castle Rock which are significant for spring floods but are insignificant for summer or fall floods because they are normally maintained nearly full in the summer and fall and have very little storage for floodwaters. (USGS)

33 CFR 125.06 - Western rivers.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Western rivers. 125.06 Section... VESSELS § 125.06 Western rivers. The term western rivers as used in the regulations in this subchapter shall include only the Red River of the North, the Mississippi River and its tributaries above the Huey...

78 FR 53666 - Drawbridge Operation Regulation; Wolf River, Gills Landing and Winneconne, WI

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-30

... the Upper Fox River. The Wolf River has two drawbridges over the waterway. The Winneconne Highway... the Fox River that connect directly with the Wolf River. This rule will establish consistent operating... by WDOT and Fox River Valley Navigation Authority for the past 10 to 15 years. These agencies, along...

Quantifying Km-scale Hydrological Exchange Flows under Dynamic Flows and Their Influences on River Corridor Biogeochemistry

NASA Astrophysics Data System (ADS)

Chen, X.; Song, X.; Shuai, P.; Hammond, G. E.; Ren, H.; Zachara, J. M.

2017-12-01

Hydrologic exchange flows (HEFs) in rivers play vital roles in watershed ecological and biogeochemical functions due to their strong capacity to attenuate contaminants and process significant quantities of carbon and nutrients. While most of existing HEF studies focus on headwater systems with the assumption of steady-state flow, there is lack of understanding of large-scale HEFs in high-order regulated rivers that experience high-frequency stage fluctuations. The large variability of HEFs is a result of interactions between spatial heterogeneity in hydrogeologic properties and temporal variation in river discharge induced by natural or anthropogenic perturbations. Our 9-year spatially distributed dataset (water elevation, specific conductance, and temperature) combined with mechanistic hydrobiogeochemical simulations have revealed complex spatial and temporal dynamics in km-scale HEFs and their significant impacts on contaminant plume mobility and hyporheic biogeochemical processes along the Hanford Reach. Extended multidirectional flow behaviors of unconfined, river corridor groundwater were observed hundreds of meters inland from the river shore resulting from discharge-dependent HEFs. An appropriately sized modeling domain to capture the impact of regional groundwater flow as well as knowledge of subsurface structures controlling intra-aquifer hydrologic connectivity were essential to realistically model transient storage in this large-scale river corridor. This work showed that both river water and mobile groundwater contaminants could serve as effective tracers of HEFs, thus providing valuable information for evaluating and validating the HEF models. Multimodal residence time distributions with long tails were resulted from the mixture of long and short exchange pathways, which consequently impact the carbon and nutrient cycling within the river corridor. Improved understanding of HEFs using integrated observational and modeling approaches sheds light on developing fundamental understanding of the influences of HEFs on water quality, nutrient dynamics, and ecosystem health in dynamic river corridor systems.

76 FR 52602 - Drawbridge Operation Regulation; Anacostia River, Washington, DC

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-23

... operation of the CSX Railroad Vertical Lift Bridge across the Anacostia River, mile 3.4 at Washington, DC... Railroad Company has requested a change in the operating regulation for the CSX Railroad Vertical Lift...

75 FR 41119 - Special Local Regulations; Sabine River, Orange, TX

Federal Register 2010, 2011, 2012, 2013, 2014

2010-07-15

... Regulation is intended to restrict vessels from portions of the Sabine River during the Thunder on the Sabine... Orange, TX, Thunder on the Sabine boat races. The powerboat race and associated testing will occur...

Flow regulation and fragmentation imperil pelagic-spawning riverine fishes.

PubMed

Dudley, Robert K; Platania, Steven P

2007-10-01

Flow regulation and fragmentation of the world's rivers threaten the integrity of freshwater ecosystems and have resulted in the loss or decline of numerous fish species. Pelagic-spawning fishes (pelagophils) are thought to be particularly susceptible to river regulation because their early life stages (ichthyoplankton) drift until becoming free-swimming, although the extent of transport is largely unknown. Transport velocity and distance were determined for passively drifting particles, which mimicked physical properties of ichthyoplankton, in two large, regulated rivers (Rio Grande and Pecos River) of the arid Southwest United States. Particle drift data were incorporated into celerity-discharge equations (r2 > 0.90; P < 0.001), and reach-specific transport velocity was modeled as a function of discharge. Transport velocities of particles exceeded 0.7 m/s in all river reaches during typical spawning flows (i.e., reservoir releases or rainstorms) and were greatest in highly incised and narrow channel reaches. Mean transport distance of particles released in the Pecos River during sustained reservoir flows (141.1 km; 95% CI = 117.0-177.5 km) was significantly longer than during declining reservoir flows that mimicked a natural rainstorm (52.4 km; 95% CI = 48.8-56.5 km). Mean transport distance of particles in the Rio Grande during sustained reservoir flows was 138.7 km (95% CI = 131.0-147.2 km). There are 68 dams and 13 reservoirs that fragment habitats and regulate flow in the Rio Grande Basin (Rio Grande and Pecos River) in areas historically occupied by pelagophils. While the basin historically provided 4029 km of free-flowing riverine habitat, reservoir habitat now represents > 10% of the longitudinal distance. Only five unfragmented nonreservoir reaches > 100 km remain in the Rio Grande, and two remain in the Pecos River. Pelagophils were extirpated from all reservoirs and from nearly all short, fragmented reaches (< 100 km) of the Rio Grande Basin, but at least some fraction persisted in all longer reaches (> 100 km). The recovery and long-term persistence of pelagophils in regulated rivers, including those in this study, will likely depend on reestablishment and protection of long unfragmented reaches coupled with mimicry of the natural flow regime.

Concentrations and characteristics of organic carbon in surface water in Arizona: Influence of urbanization

USGS Publications Warehouse

Westerhoff, P.; Anning, D.

2000-01-01

Dissolved (DOC) and total (TOC) organic carbon concentrations and compositions were studied for several river systems in Arizona, USA. DOC composition was characterized by ultraviolet and visible absorption and fluorescence emission (excitation wavelength of 370 nm) spectra characteristics. Ephemeral sites had the highest DOC concentrations, and unregulated perennial sites had lower concentrations than unregulated intermittent sites, regulated sites, and sites downstream from wastewater-treatment plants (p < 0.05). Reservoir outflows and wastewater-treatment plant effluent were higher in DOC concentration (p < 0.05) and exhibited less variability in concentration than inflows to the reservoirs. Specific ultraviolet absorbance values at 254 nm were typically less than 2 m-1(milligram DOC per liter)-1 and lower than values found in most temperate-region rivers, but specific ultraviolet absorbance values increased during runoff events. Fluorescence measurements indicated that DOC in desert streams typically exhibit characteristics of autochthonous sources; however, DOC in unregulated upland rivers and desert streams experienced sudden shifts from autochthonous to allochthonous sources during runoff events. The urban water system (reservoir systems and wastewater-treatment plants) was found to affect temporal variability in DOC concentration and composition. (C) 2000 Elsevier Science B.V.Dissolved (DOC) and total (TOC) organic carbon concentrations and compositions were studied for several river systems in Arizona, USA. DOC composition was characterized by ultraviolet and visible absorption and fluorescence emission (excitation wavelength of 370 nm) spectra characteristics. Ephemeral sites had the highest DOC concentrations, and unregulated perennial sites had lower concentrations than unregulated intermittent sites, regulated sites, and sites downstream from wastewater-treatment plants (p<0.05). Reservoir outflows and wastewater-treatment plant effluent were higher in DOC concentration (p<0.05) and exhibited less variability in concentration than inflows to the reservoirs. Specific ultraviolet absorbance values at 254 nm were typically less than 2 m-1(milligram DOC per liter)-1 and lower than values found in most temperate-region rivers, but specific ultraviolet absorbance values increased during runoff events. Fluorescence measurements indicated that DOC in desert streams typically exhibit characteristics of autochthonous sources; however, DOC in unregulated upland rivers and desert streams experienced sudden shifts from autochthonous to allochthonous sources during runoff events. The urban water system (reservoir systems and wastewater-treatment plants) was found to affect temporal variability in DOC concentration and composition.The influence of urbanization, becoming increasingly common in arid regions, on dissolved organic carbon (DOC) concentrations in surface water resources was studied. DOC concentration and composition, seasonal watershed runoff events, streamflow variations, water management practices, and urban infrastructure in several Arizona watersheds were monitored. Ephemeral sites had the highest DOC levels, and unregulated perennial sites and lower concentrations than unregulated intermittent sites, regulated sites, and sites downstream from wastewater treatment plants. Reservoir outflows and wastewater treatment plant effluent had higher and less variable DOC concentrations than inflows to reservoirs. UV absorbance values, fluorescence measurements, and other indicators suggest that urban water systems (reservoirs and wastewater treatment plants) affect temporal variability in DOC concentration and composition.

Mercury levels in largemouth bass (Micropterus salmoides) from regulated and unregulated rivers.

PubMed

Dharampal, Prarthana S; Findlay, Robert H

2017-03-01

Within areas of comparable atmospheric mercury deposition rates methylmercury burden in largemouth bass populations vary significantly between regulated and unregulated rivers. To investigate if trophic dynamics strongly influenced pollutant body load, we sampled largemouth bass from two adjacent rivers, one regulated and one unregulated, and applied a suite of biochemical and stable isotope assays to compare their trophic dynamics. Total mercury burden in the bass from the unregulated Sipsey River (Elrod, AL, USA) and the regulated Black Warrior River (Demopolis, AL, USA) averaged 0.87 mg kg -1 and 0.19 mg kg -1 wet weight, respectively. For both populations, age, weight, and length were positively correlated with muscle mercury concentration. Compound specific stable isotope analysis of amino acids showed the trophic position of both populations was just under four. Quantitative and isotopic analysis of neutral lipid fatty acid of Sipsey River bass indicated a greater reliance upon the detrital component of the food web compared to Demopolis Reservoir bass which fed within the autochthonous, pelagic component of the food web. Since the close proximity of the rivers makes differences in atmospheric deposition unlikely and both populations had similar trophic position, our findings indicate that food web dynamics should be included among the factors that can strongly influence mercury concentration in fish. Copyright © 2016 Elsevier Ltd. All rights reserved.

Model based hydropower gate operation for mitigation of CSO impacts by means of river base flow increase.

PubMed

Achleitner, S; De Toffol, S; Engelhard, C; Rauch, W

2005-01-01

In river stretches being subjected to flow regulation, usually for the purpose of energy production (e.g. Hydropower) or flood protection (river barrage), a special measure can be taken against the effect of combined sewer overflows (CSOs). The basic idea is the temporal increase of the river base flow (during storm weather) as an in-stream measure for mitigation of CSO spilling. The focus is the mitigation of the negative effect of acute pollution of substances. The measure developed can be seen as an application of the classic real time control (RTC) concept onto the river system. Upstream gate operation is to be based on real time monitoring and forecasting of precipitation. The main objective is the development of a model based predictive control system for the gate operation, by modelling of the overall wastewater system (incl. the receiving water). The main emphasis is put on the operational strategy and the appropriate short-term forecast of spilling events. The potential of the measure is tested for the application of the operational strategy and its ecological and economic feasibility. The implementation of such an in-stream measure into the hydropower's operational scheme is unique. Advantages are (a) the additional in-stream dilution of acute pollutants entering the receiving water and (b) the resulting minimization of the required CSO storage volume.

A micro case study of the legal and administrative arrangements for river health in the Kangaroo River (NSW).

PubMed

Mooney, C; Farrier, D

2002-01-01

Kangaroo Valley is a drinking water supply catchment for Kangaroo Valley village, parts of the Southern Highlands and Sydney. It is also a popular recreation area both for swimming and canoeing. Land use has traditionally been dominated by dairy farming but there has been significant and continuing development of land for hobby farms and rural residential subdivision. Dairy industry restructuring has affected the viability of some farms in the Valley and created additional pressure for subdivision. River health is a function of flows, water quality, riparian vegetation, geomorphology and aquatic habitat and riverine biota. River flows in the Kangaroo River are affected by water extraction and storage for urban water supply and extraction by commercial irrigators and riparian land holders which have a significant impact at low flows. Current water quality often does not meet ANZECC Guidelines for primary contact and recreation and the river is a poor source of raw drinking water. Key sources of contaminants are wastewater runoff from agriculture, and poorly performing on-site sewage management systems. Riparian vegetation, which is critical to the maintenance of in-stream ecosystems suffers from uncontrolled stock access and weed infestation. The management of land use and resulting diffuse pollution sources is critical to the long term health of the river. The Healthy Rivers Commission of New South Wales Independent Inquiry into the Shoalhaven River System Final Report July, 1999 found that the longer term protection of the health of the Kangaroo River is contingent upon achievement of patterns of land use that have regard to land capability and also to the capability of the river to withstand the impacts of inappropriate or poorly managed land uses. This micro case study of Kangaroo Valley examines the complex legal and administrative arrangements with particular reference to the management of diffuse pollution for river health. In the past, diffuse pollution has fallen through the gaps in legislation and its administration. Although water pollution legislation is broad enough to embrace diffuse pollution, in practice the Environment Protection Authority has focused on regulating point sources. Water legislation has traditionally been concerned with issues of water quantity rather than water quality. Legislation which allows agency intervention in relation to land degradation has grown from soil conservation roots, neglecting the flow-on effects upon water quality. Under the land use planning system existing land uses are protected from new regulatory requirements. A number of recent developments in NSW law and its administration have set the scene for addressing this past neglect. Water planning provisions in the Water Management Act 2000 have the potential to enable community based Water Management Committees to move away from a narrow focus on water quantity to the broader issues of river health, including water quality. Improved management of on-site sewage management systems is expected as a result of the Local Government (Approvals) Amendment (Sewage Management Regulation) 1998. A draft Regional Environmental Plan prepared for the Sydney Catchment Authority aims to improve the assessment of new development in terms of its impact on drinking water quality. It also moves away from an exclusive concern with controlling new development towards grappling with existing uses. Proposed amendments to the Environmental Planning and Assessment Act, 1979 as detailed in the White Paper, Plan First (2001) include the integration of imperatives derived from catchment strategies and water management plans into local land use plans.

The Evolution of the Lower Missouri River: National Mapping Discipline Research at Lisbon Bottom

USGS Publications Warehouse

,

2002-01-01

Before 1800, the Missouri River was one of North America's most diverse and dynamic ecosystems. During the past 200 years, civil engineering has transformed it into a navigation system regulated by reservoirs and confined by bank stabilization and flood control structures. These modifications have reduced seasonal flow variability and sediment load and have disconnected the river from backwater, off-channel, and floodplain habitats. Flooding along the Lower Missouri River in 1993 and again in 1996 created a side-channel chute across Lisbon Bottom, a well-formed loop bottom near Glasgow, Mo. The formation and subsequent development of the chute have provided USGS scientists with a glimpse of a preregulated Missouri River. Knowledge of geologic characteristics and processes in an alluvial setting like Lisbon Bottom provides a scientific basis for floodplain management. This knowledge is also vital to a complete understanding of riverine habitat disturbance, recovery, and rehabilitation. A critical component of this knowledge is an understanding of the spatial and temporal relationships between riverine habitats and geomorphic processes.

One-way coupling of an integrated assessment model and a water resources model: evaluation and implications of future changes over the US Midwest

NASA Astrophysics Data System (ADS)

Voisin, N.; Liu, L.; Hejazi, M.; Tesfa, T.; Li, H.; Huang, M.; Liu, Y.; Leung, L. R.

2013-11-01

An integrated model is being developed to advance our understanding of the interactions between human activities, terrestrial system and water cycle, and to evaluate how system interactions will be affected by a changing climate at the regional scale. As a first step towards that goal, a global integrated assessment model, which includes a water-demand model driven by socioeconomics at regional and global scales, is coupled in a one-way fashion with a land surface hydrology-routing-water resources management model. To reconcile the scale differences between the models, a spatial and temporal disaggregation approach is developed to downscale the annual regional water demand simulations into a daily time step and subbasin representation. The model demonstrates reasonable ability to represent the historical flow regulation and water supply over the US Midwest (Missouri, Upper Mississippi, and Ohio river basins). Implications for future flow regulation, water supply, and supply deficit are investigated using climate change projections with the B1 and A2 emission scenarios, which affect both natural flow and water demand. Although natural flow is projected to increase under climate change in both the B1 and A2 scenarios, there is larger uncertainty in the changes of the regulated flow. Over the Ohio and Upper Mississippi river basins, changes in flow regulation are driven by the change in natural flow due to the limited storage capacity. However, both changes in flow and demand have effects on the Missouri River Basin summer regulated flow. Changes in demand are driven by socioeconomic factors, energy and food demands, global markets and prices with rainfed crop demand handled directly by the land surface modeling component. Even though most of the changes in supply deficit (unmet demand) and the actual supply (met demand) are driven primarily by the change in natural flow over the entire region, the integrated framework shows that supply deficit over the Missouri River Basin sees an increasing sensitivity to changes in demand in future periods. It further shows that the supply deficit is six times as sensitive as the actual supply to changes in flow and demand. A spatial analysis of the supply deficit demonstrates vulnerabilities of urban areas located along mainstream with limited storage.

78 FR 54168 - Special Local Regulation, Cumberland River, Mile 157.0 to 159.0; Ashland City, TN

Federal Register 2010, 2011, 2012, 2013, 2014

2013-09-03

... local regulation will not have a significant economic impact on a substantial number of small entities... Local Regulation, Cumberland River, Mile 157.0 to 159.0; Ashland City, TN AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The Coast Guard is establishing a temporary special local...

77 FR 70372 - Drawbridge Operation Regulation; Shark River (South Channel), Avon Township, NJ

Federal Register 2010, 2011, 2012, 2013, 2014

2012-11-26

... regulation that governs the opening of the S35 Bridge, mile 0.9, across Shark River (South Channel) at Avon... no longer a movable bridge, the regulation controlling the opening and closing of the bridge is no... jeopardizing the safety or security of people, places or vessels. 6. Unfunded Mandates Reform Act The Unfunded...

33 CFR 165.1323 - Regulated Navigation Area: Willamette River Portland, Oregon Captain of the Port Zone.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Regulated Navigation Area: Willamette River Portland, Oregon Captain of the Port Zone. 165.1323 Section 165.1323 Navigation and..., Oregon Captain of the Port Zone. (a) Location. The following is a regulated navigation area (RNA): All...

33 CFR 165.1322 - Regulated Navigation Area: Willamette River Portland, Oregon Captain of the Port Zone.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Regulated Navigation Area: Willamette River Portland, Oregon Captain of the Port Zone. 165.1322 Section 165.1322 Navigation and..., Oregon Captain of the Port Zone. (a) Location. The following is a regulated navigation area (RNA): All...

78 FR 54571 - Special Local Regulation for Marine Event Hampton Bay Days Festival, Hampton River; Hampton, VA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-09-05

...-AA08 Special Local Regulation for Marine Event Hampton Bay Days Festival, Hampton River; Hampton, VA... Fifth Coast Guard District. This regulation applies only to the Hampton Bay Days Festival, which... Purpose Hampton Bay Days is sponsoring the three days Hampton Bay Days Festival, which includes a...

76 FR 72309 - Drawbridge Operation Regulation; Neuse River, New Bern, NC

Federal Register 2010, 2011, 2012, 2013, 2014

2011-11-23

... bridge across Neuse River, mile 33.7 at New Bern, NC. The drawbridge was replaced with a fixed bridge in..., mile 33.7, at New Bern, NC was removed and replaced with a fixed bridge in 1999. It has come to the... Federal Regulations by removing language that regulates signaling and notice requirements for the opening...

77 FR 73916 - Regulated Navigation Area; S99 Alford Street Bridge Rehabilitation Project, Mystic River, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2012-12-12

...-AA11 Regulated Navigation Area; S99 Alford Street Bridge Rehabilitation Project, Mystic River, MA... against hazardous conditions created by repair work on the S99 Alford Street Bridge across the Mystic... Coast Guard to establish a regulated navigation area in connection with the S99 Alford Street Bridge...

33 CFR 165.821 - Ohio River at Cincinnati, OH; regulated navigation area.

Code of Federal Regulations, 2013 CFR

2013-07-01

... regulated navigation area (RNA)—The waters of the Ohio River between mile 466.0 and mile 473.0. (b.... (1) Transit through the RNA by all downbound vessels towing cargoes regulated by Title 46 Code of... navigation channel of the RNA. (3) All commercial vessels shall continually monitor VHF-FM channel 13 on...

33 CFR 165.821 - Ohio River at Cincinnati, OH; regulated navigation area.

Code of Federal Regulations, 2014 CFR

2014-07-01

... regulated navigation area (RNA)—The waters of the Ohio River between mile 466.0 and mile 473.0. (b.... (1) Transit through the RNA by all downbound vessels towing cargoes regulated by Title 46 Code of... navigation channel of the RNA. (3) All commercial vessels shall continually monitor VHF-FM channel 13 on...

33 CFR 165.821 - Ohio River at Cincinnati, OH; regulated navigation area.

Code of Federal Regulations, 2011 CFR

2011-07-01

... regulated navigation area (RNA)—The waters of the Ohio River between mile 466.0 and mile 473.0. (b.... (1) Transit through the RNA by all downbound vessels towing cargoes regulated by Title 46 Code of... navigation channel of the RNA. (3) All commercial vessels shall continually monitor VHF-FM channel 13 on...

33 CFR 165.821 - Ohio River at Cincinnati, OH; regulated navigation area.

Code of Federal Regulations, 2012 CFR

2012-07-01

... regulated navigation area (RNA)—The waters of the Ohio River between mile 466.0 and mile 473.0. (b.... (1) Transit through the RNA by all downbound vessels towing cargoes regulated by Title 46 Code of... navigation channel of the RNA. (3) All commercial vessels shall continually monitor VHF-FM channel 13 on...

33 CFR 165.821 - Ohio River at Cincinnati, OH; regulated navigation area.

Code of Federal Regulations, 2010 CFR

2010-07-01

... regulated navigation area (RNA)—The waters of the Ohio River between mile 466.0 and mile 473.0. (b.... (1) Transit through the RNA by all downbound vessels towing cargoes regulated by Title 46 Code of... navigation channel of the RNA. (3) All commercial vessels shall continually monitor VHF-FM channel 13 on...

33 CFR 162.205 - Suisun Bay, San Joaquin River, Sacramento River, and connecting waters, CA.

Code of Federal Regulations, 2013 CFR

2013-07-01

..., Sacramento River, and connecting waters, CA. 162.205 Section 162.205 Navigation and Navigable Waters COAST... NAVIGATION REGULATIONS § 162.205 Suisun Bay, San Joaquin River, Sacramento River, and connecting waters, CA. (a) San Joaquin River Deep Water Channel between Suisun Bay and the easterly end of the channel at...

33 CFR 162.205 - Suisun Bay, San Joaquin River, Sacramento River, and connecting waters, CA.

Code of Federal Regulations, 2014 CFR

2014-07-01

..., Sacramento River, and connecting waters, CA. 162.205 Section 162.205 Navigation and Navigable Waters COAST... NAVIGATION REGULATIONS § 162.205 Suisun Bay, San Joaquin River, Sacramento River, and connecting waters, CA. (a) San Joaquin River Deep Water Channel between Suisun Bay and the easterly end of the channel at...

33 CFR 162.205 - Suisun Bay, San Joaquin River, Sacramento River, and connecting waters, CA.

Code of Federal Regulations, 2012 CFR

2012-07-01

..., Sacramento River, and connecting waters, CA. 162.205 Section 162.205 Navigation and Navigable Waters COAST... NAVIGATION REGULATIONS § 162.205 Suisun Bay, San Joaquin River, Sacramento River, and connecting waters, CA. (a) San Joaquin River Deep Water Channel between Suisun Bay and the easterly end of the channel at...

29 CFR 1917.126 - River banks.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 29 Labor 7 2011-07-01 2011-07-01 false River banks. 1917.126 Section 1917.126 Labor Regulations...) MARINE TERMINALS Terminal Facilities § 1917.126 River banks. (a) This section applies to temporary installations or temporary operations near a river bank. (b) Where working surfaces at river banks slope so...

29 CFR 1917.126 - River banks.

Code of Federal Regulations, 2010 CFR

2010-07-01

...) MARINE TERMINALS Terminal Facilities § 1917.126 River banks. (a) This section applies to temporary installations or temporary operations near a river bank. (b) Where working surfaces at river banks slope so... 29 Labor 7 2010-07-01 2010-07-01 false River banks. 1917.126 Section 1917.126 Labor Regulations...

Integrated Analysis of Flow, Form, and Function for River Management and Design Testing

NASA Astrophysics Data System (ADS)

Lane, B. A. A.; Pasternack, G. B.; Sandoval Solis, S.

2017-12-01

Rivers are highly complex, dynamic systems that support numerous ecosystem functions including transporting sediment, modulating biogeochemical processes, and regulating habitat availability for native species. The extent and timing of these functions is largely controlled by the interplay of hydrologic dynamics (i.e. flow) and the shape and composition of the river corridor (i.e. form). This study applies synthetic channel design to the evaluation of river flow-form-function linkages, with the aim of evaluating these interactions across a range of flows and forms to inform process-driven management efforts with limited data and financial requirements. In an application to California's Mediterranean-montane streams, the interacting roles of channel form, water year type, and hydrologic impairment were evaluated across a suite of ecosystem functions related to hydrogeomorphic processes, aquatic habitat, and riparian habitat. Channel form acted as the dominant control on hydrogeomorphic processes considered, while water year type controlled salmonid habitat functions. Streamflow alteration for hydropower increased redd dewatering risk and altered aquatic habitat availability and riparian recruitment dynamics. Study results highlight critical tradeoffs in ecosystem function performance and emphasize the significance of spatiotemporal diversity of flow and form at multiple scales for maintaining river ecosystem integrity. The approach is broadly applicable and extensible to other systems and ecosystem functions, where findings can be used to characterize complex controls on river ecosystems, assess impacts of proposed flow and form alterations, and inform river restoration strategies.

33 CFR 100.35T05-0276 - Special Local Regulations for Marine Events; Potomac River, National Harbor Access Channel, MD.

Code of Federal Regulations, 2013 CFR

2013-07-01

... Marine Events; Potomac River, National Harbor Access Channel, MD. 100.35T05-0276 Section 100.35T05-0276... SAFETY OF LIFE ON NAVIGABLE WATERS § 100.35T05-0276 Special Local Regulations for Marine Events; Potomac... area: All waters of the Potomac River, within lines connecting the following positions: From 38°47′35...

33 CFR 100.35T05-0276 - Special Local Regulations for Marine Events; Potomac River, National Harbor Access Channel, MD.

Code of Federal Regulations, 2014 CFR

2014-07-01

... Marine Events; Potomac River, National Harbor Access Channel, MD. 100.35T05-0276 Section 100.35T05-0276... SAFETY OF LIFE ON NAVIGABLE WATERS § 100.35T05-0276 Special Local Regulations for Marine Events; Potomac... area: All waters of the Potomac River, within lines connecting the following positions: From 38°47′35...

Complexity of Bacterial Communities in a River-Floodplain System (Danube, Austria)

PubMed Central

Besemer, Katharina; Moeseneder, Markus M.; Arrieta, Jesus M.; Herndl, Gerhard J.; Peduzzi, Peter

2005-01-01

Natural floodplains play an essential role in the processing and decomposition of organic matter and in the self-purification ability of rivers, largely due to the activity of bacteria. Knowledge about the composition of bacterial communities and its impact on organic-matter cycling is crucial for the understanding of ecological processes in river-floodplain systems. Particle-associated and free-living bacterial assemblages from the Danube River and various floodplain pools with different hydrological characteristics were investigated using terminal restriction fragment length polymorphism analysis. The particle-associated bacterial community exhibited a higher number of operational taxonomic units (OTUs) and was more heterogeneous in time and space than the free-living community. The temporal dynamics of the community structure were generally higher in isolated floodplain pools. The community structures of the river and the various floodplain pools, as well as those of the particle-associated and free-living bacteria, differed significantly. The compositional dynamics of the planktonic bacterial communities were related to changes in the algal biomass, temperature, and concentrations of organic and inorganic nutrients. The OTU richness of the free-living community was correlated with the concentration and origin of organic matter and the concentration of inorganic nutrients, while no correlation with the OTU richness of the particle-associated assemblage was found. Our results demonstrate the importance of the river-floodplain interactions and the influence of damming and regulation on the bacterial-community composition. PMID:15691909

Development and application of a large scale river system model for National Water Accounting in Australia

NASA Astrophysics Data System (ADS)

Dutta, Dushmanta; Vaze, Jai; Kim, Shaun; Hughes, Justin; Yang, Ang; Teng, Jin; Lerat, Julien

2017-04-01

Existing global and continental scale river models, mainly designed for integrating with global climate models, are of very coarse spatial resolutions and lack many important hydrological processes, such as overbank flow, irrigation diversion, groundwater seepage/recharge, which operate at a much finer resolution. Thus, these models are not suitable for producing water accounts, which have become increasingly important for water resources planning and management at regional and national scales. A continental scale river system model called Australian Water Resource Assessment River System model (AWRA-R) has been developed and implemented for national water accounting in Australia using a node-link architecture. The model includes major hydrological processes, anthropogenic water utilisation and storage routing that influence the streamflow in both regulated and unregulated river systems. Two key components of the model are an irrigation model to compute water diversion for irrigation use and associated fluxes and stores and a storage-based floodplain inundation model to compute overbank flow from river to floodplain and associated floodplain fluxes and stores. The results in the Murray-Darling Basin shows highly satisfactory performance of the model with median daily Nash-Sutcliffe Efficiency (NSE) of 0.64 and median annual bias of less than 1% for the period of calibration (1970-1991) and median daily NSE of 0.69 and median annual bias of 12% for validation period (1992-2014). The results have demonstrated that the performance of the model is less satisfactory when the key processes such as overbank flow, groundwater seepage and irrigation diversion are switched off. The AWRA-R model, which has been operationalised by the Australian Bureau of Meteorology for continental scale water accounting, has contributed to improvements in the national water account by substantially reducing accounted different volume (gain/loss).

Water clarity of the Colorado River—Implications for food webs and fish communities

USGS Publications Warehouse

Voichick, Nicholas; Kennedy, Theodore A.; Topping, David; Griffiths, Ronald; Fry, Kyrie

2016-11-01

The closure of Glen Canyon Dam in 1963 resulted in drastic changes to water clarity, temperature, and flow of the Colorado River in Glen, Marble, and Grand Canyons. The Colorado River is now much clearer, water temperature is less variable throughout the year, and the river is much colder in the summer months. The flow—regulated by the dam—is now less variable annually, but has larger daily fluctuations than during pre-dam times. All of these changes have resulted in a different fish community and different food resources for fish than existed before the dam was built. Recent monitoring of water clarity, by measuring turbidity, has helped scientists and river managers understand modern water-clarity patterns in the dam-regulated Colorado River. These data were then used to estimate pre-dam turbidity in the Colorado River in order to make comparisons of pre-dam and dam-regulated conditions, which are useful for assessing biological changes in the river over time. Prior to dam construction, the large sediment load resulted in low water clarity almost all of the time, a condition which was more favorable for the native fish community.

The Effect of Hydroelectric Power Plants (hpp) on Agro-Life at Rural Land Regulation in Turkey

NASA Astrophysics Data System (ADS)

Onursal Denli, G.; Denli, H. H.; Seker, D. Z.; Bitik, E.; Cetin, S.

2014-12-01

Turkey is one of the self-sufficient in foodstuffs and globally ranks as 7th significant agricultural exporter in the world. Main trading partners are the European Union, the United States and the Middle East. As known, agricultural production is dependent on factors including efficient and effective use of all inputs ranging from those natural resources as in land and water to well-trained human resources as labour at the production. The socio-economic aspects of this sector take several forms ranging from the incomes of the primary producers. Rural land regulation is a necessity for rural areas and is regarded as a useful instrument for improving farmer's incomes and life standards. The irrigation system, established during the rural regulation/land consolidation period of large-scale farming, is insufficiently adjusted to the new land tenure structures. The government is especially in the process of water management with hydroelectric power plants. This process produces energy that is required but effects negatively the rivers and agricultural, environmental, climatic conditions. Rivers are vessels of the nature. Free flowing rivers give life to all nature. Most of the studies indicate that Hydroelectric Power Plants (HPP) affects the surface and ground-water management, natural life, agricultural productivity, socio-economic situation at agricultural regions and agro-life related with immigration. This study emphasizes the effect of Hydroelectric Power Plants which are used in transformation of water as a renewable natural resource into electricity power from the perspective of environmental policies and rural regulation.

33 CFR 165.T01-0048 - Regulated Navigation Area; MBTA Saugus River Railroad Drawbridge rehabilitation project, Saugus...

Code of Federal Regulations, 2012 CFR

2012-07-01

... a Regulated Navigation Area (RNA): All navigable waters, surface to bottom, on the Saugus River..., the operator of the vessel must proceed as directed. (5) Notwithstanding any other provisions in this...

18 CFR 1304.410 - Navigation restrictions.

Code of Federal Regulations, 2010 CFR

2010-04-01

..., structures, land based or water use, shall not be located within the limits of safety harbors and landings established for commercial navigation. (b) Structures shall not be located in such a way as to block the... OF CONSTRUCTION IN THE TENNESSEE RIVER SYSTEM AND REGULATION OF STRUCTURES AND OTHER ALTERATIONS...

18 CFR 1304.410 - Navigation restrictions.

Code of Federal Regulations, 2011 CFR

2011-04-01

..., structures, land based or water use, shall not be located within the limits of safety harbors and landings established for commercial navigation. (b) Structures shall not be located in such a way as to block the... OF CONSTRUCTION IN THE TENNESSEE RIVER SYSTEM AND REGULATION OF STRUCTURES AND OTHER ALTERATIONS...

36 CFR 13.550 - Wildlife distance conditions.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 36 Parks, Forests, and Public Property 1 2010-07-01 2010-07-01 false Wildlife distance conditions. 13.550 Section 13.550 Parks, Forests, and Public Property NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR NATIONAL PARK SYSTEM UNITS IN ALASKA Special Regulations-Alagnak Wild River § 13.550 Wildlife...

36 CFR 13.550 - Wildlife distance conditions.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 36 Parks, Forests, and Public Property 1 2013-07-01 2013-07-01 false Wildlife distance conditions. 13.550 Section 13.550 Parks, Forests, and Public Property NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR NATIONAL PARK SYSTEM UNITS IN ALASKA Special Regulations-Alagnak Wild River § 13.550 Wildlife...

36 CFR 13.550 - Wildlife distance conditions.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 36 Parks, Forests, and Public Property 1 2012-07-01 2012-07-01 false Wildlife distance conditions. 13.550 Section 13.550 Parks, Forests, and Public Property NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR NATIONAL PARK SYSTEM UNITS IN ALASKA Special Regulations-Alagnak Wild River § 13.550 Wildlife...

36 CFR 13.550 - Wildlife distance conditions.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 36 Parks, Forests, and Public Property 1 2011-07-01 2011-07-01 false Wildlife distance conditions. 13.550 Section 13.550 Parks, Forests, and Public Property NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR NATIONAL PARK SYSTEM UNITS IN ALASKA Special Regulations-Alagnak Wild River § 13.550 Wildlife...

36 CFR 13.550 - Wildlife distance conditions.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 36 Parks, Forests, and Public Property 1 2014-07-01 2014-07-01 false Wildlife distance conditions. 13.550 Section 13.550 Parks, Forests, and Public Property NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR NATIONAL PARK SYSTEM UNITS IN ALASKA Special Regulations-Alagnak Wild River § 13.550 Wildlife...

18 CFR 1304.409 - Indefinite or temporary moorage of recreational vessels.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 18 Conservation of Power and Water Resources 2 2010-04-01 2010-04-01 false Indefinite or temporary... TENNESSEE VALLEY AUTHORITY APPROVAL OF CONSTRUCTION IN THE TENNESSEE RIVER SYSTEM AND REGULATION OF STRUCTURES AND OTHER ALTERATIONS Miscellaneous § 1304.409 Indefinite or temporary moorage of recreational...

18 CFR 1304.204 - Docks, piers, and boathouses.

Code of Federal Regulations, 2014 CFR

2014-04-01

... mesh leaves the interior of the structure open to the weather. (n) Except for nonnavigable houseboats... APPROVAL OF CONSTRUCTION IN THE TENNESSEE RIVER SYSTEM AND REGULATION OF STRUCTURES AND OTHER ALTERATIONS... structure of the maximum size, TVA shall determine the size of facility that may be approved. Applicants are...

18 CFR 1304.204 - Docks, piers, and boathouses.

Code of Federal Regulations, 2012 CFR

2012-04-01

... mesh leaves the interior of the structure open to the weather. (n) Except for nonnavigable houseboats... APPROVAL OF CONSTRUCTION IN THE TENNESSEE RIVER SYSTEM AND REGULATION OF STRUCTURES AND OTHER ALTERATIONS... structure of the maximum size, TVA shall determine the size of facility that may be approved. Applicants are...

18 CFR 1304.204 - Docks, piers, and boathouses.

Code of Federal Regulations, 2013 CFR

2013-04-01

... mesh leaves the interior of the structure open to the weather. (n) Except for nonnavigable houseboats... APPROVAL OF CONSTRUCTION IN THE TENNESSEE RIVER SYSTEM AND REGULATION OF STRUCTURES AND OTHER ALTERATIONS... structure of the maximum size, TVA shall determine the size of facility that may be approved. Applicants are...

Thermal pollution impacts on rivers and power supply in the Mississippi River watershed

DOE Office of Scientific and Technical Information (OSTI.GOV)

Miara, Ariel; Vorosmarty, Charles J.; Macknick, Jordan E.

Thermal pollution from power plants degrades riverine ecosystems with ramifications beyond the natural environment as it affects power supply. The transport of thermal effluents along river reaches may lead to plant-to-plant interferences by elevating condenser inlet temperatures at downstream locations, which lower thermal efficiencies and trigger regulatory-forced power curtailments. We evaluate thermal pollution impacts on rivers and power supply across 128 plants with once-through cooling technologies in the Mississippi River watershed. By leveraging river network topologies with higher resolutions (0.05 degrees) than previous studies, we reveal the need to address the issue in a more spatially resolved manner, capable ofmore » uncovering diverse impacts across individual plants, river reaches and sub-basins. Results show that the use of coarse river network resolutions may lead to substantial overestimations in magnitude and length of impaired river reaches. Overall, there is a modest limitation on power production due to thermal pollution, given existing infrastructure, regulatory and climate conditions. However, tradeoffs between thermal pollution and electricity generation show important implications for the role of alternative cooling technologies and environmental regulation under current and future climates. Recirculating cooling technologies may nearly eliminate thermal pollution and improve power system reliability under stressed climate-water conditions. Regulatory limits also reduce thermal pollution, but at the expense of significant reductions in electricity generation capacity. However, results show several instances when power production capacity rises at individual plants when regulatory limits reduce upstream thermal pollution. Furthermore, these dynamics across energy-water systems highlight the need for high-resolution simulations and the value of coherent planning and optimization across infrastructure with mutual dependencies on natural resources to overcome climate-water constraints on productivity and bring to fruition energy and environmental win-win opportunities.« less

The impact of land use and season on the riverine transport of mercury into the marine coastal zone.

PubMed

Saniewska, Dominika; Bełdowska, Magdalena; Bełdowski, Jacek; Saniewski, Michał; Szubska, Marta; Romanowski, Andrzej; Falkowska, Lucyna

2014-11-01

In Mediterranean seas and coastal zones, rivers can be the main source of mercury (Hg). Catchment management therefore affects the load of Hg reaching the sea with surface runoff. The major freshwater inflows to the Baltic Sea consist of large rivers. However, their systems are complex and identification of factors affecting the outflow of Hg from its catchments is difficult. For this reason, a study into the impact of watershed land use and season on mercury biogeochemistry and transport in rivers was performed along two small rivers which may be considered typical of the southern Baltic region. Neither of these rivers are currently impacted by industrial effluents, thus allowing assessment of the influence of catchment terrain and season on Hg geochemistry. The study was performed between June 2008 and May 2009 at 13 sampling points situated at different terrain types within the catchments (forest, wetland, agriculture and urban). Hg analyses were conducted by CVAFS. Arable land erosion was found to be an important source of Hg to the aquatic system, similar to urban areas. Furthermore, inflows of untreated storm water discharge resulted in a fivefold increase of Hg concentration in the rivers. The highest Hg concentration in the urban runoff was observed with the greatest amount of precipitation during summer. Moderate rainfalls enhance the inflow of bioavailable dissolved mercury into water bodies. Despite the lack of industrial effluents entering the rivers directly, the sub-catchments with anthropogenic land use were important sources of Hg in the rivers. This was caused by elution of metal, deposited in soils over the past decades, into the rivers. The obtained results are especially important in the light of recent environmental conscience regulations, enforcing the decrease of pollution by Baltic countries.

Thermal pollution impacts on rivers and power supply in the Mississippi River watershed

DOE PAGES

Miara, Ariel; Vorosmarty, Charles J.; Macknick, Jordan E.; ...

2018-03-08

Thermal pollution from power plants degrades riverine ecosystems with ramifications beyond the natural environment as it affects power supply. The transport of thermal effluents along river reaches may lead to plant-to-plant interferences by elevating condenser inlet temperatures at downstream locations, which lower thermal efficiencies and trigger regulatory-forced power curtailments. We evaluate thermal pollution impacts on rivers and power supply across 128 plants with once-through cooling technologies in the Mississippi River watershed. By leveraging river network topologies with higher resolutions (0.05 degrees) than previous studies, we reveal the need to address the issue in a more spatially resolved manner, capable ofmore » uncovering diverse impacts across individual plants, river reaches and sub-basins. Results show that the use of coarse river network resolutions may lead to substantial overestimations in magnitude and length of impaired river reaches. Overall, there is a modest limitation on power production due to thermal pollution, given existing infrastructure, regulatory and climate conditions. However, tradeoffs between thermal pollution and electricity generation show important implications for the role of alternative cooling technologies and environmental regulation under current and future climates. Recirculating cooling technologies may nearly eliminate thermal pollution and improve power system reliability under stressed climate-water conditions. Regulatory limits also reduce thermal pollution, but at the expense of significant reductions in electricity generation capacity. However, results show several instances when power production capacity rises at individual plants when regulatory limits reduce upstream thermal pollution. Furthermore, these dynamics across energy-water systems highlight the need for high-resolution simulations and the value of coherent planning and optimization across infrastructure with mutual dependencies on natural resources to overcome climate-water constraints on productivity and bring to fruition energy and environmental win-win opportunities.« less

Thermal pollution impacts on rivers and power supply in the Mississippi River watershed

NASA Astrophysics Data System (ADS)

Miara, Ariel; Vörösmarty, Charles J.; Macknick, Jordan E.; Tidwell, Vincent C.; Fekete, Balazs; Corsi, Fabio; Newmark, Robin

2018-03-01

Thermal pollution from power plants degrades riverine ecosystems with ramifications beyond the natural environment as it affects power supply. The transport of thermal effluents along river reaches may lead to plant-to-plant interferences by elevating condenser inlet temperatures at downstream locations, which lower thermal efficiencies and trigger regulatory-forced power curtailments. We evaluate thermal pollution impacts on rivers and power supply across 128 plants with once-through cooling technologies in the Mississippi River watershed. By leveraging river network topologies with higher resolutions (0.05°) than previous studies, we reveal the need to address the issue in a more spatially resolved manner, capable of uncovering diverse impacts across individual plants, river reaches and sub-basins. Results show that the use of coarse river network resolutions may lead to substantial overestimations in magnitude and length of impaired river reaches. Overall, there is a modest limitation on power production due to thermal pollution, given existing infrastructure, regulatory and climate conditions. However, tradeoffs between thermal pollution and electricity generation show important implications for the role of alternative cooling technologies and environmental regulation under current and future climates. Recirculating cooling technologies may nearly eliminate thermal pollution and improve power system reliability under stressed climate-water conditions. Regulatory limits also reduce thermal pollution, but at the expense of significant reductions in electricity generation capacity. However, results show several instances when power production capacity rises at individual plants when regulatory limits reduce upstream thermal pollution. These dynamics across energy-water systems highlight the need for high-resolution simulations and the value of coherent planning and optimization across infrastructure with mutual dependencies on natural resources to overcome climate-water constraints on productivity and bring to fruition energy and environmental win-win opportunities.

Quantifying Process-Based Mitigation Strategies in Historical Context: Separating Multiple Cumulative Effects on River Meander Migration

PubMed Central

Fremier, Alexander K.; Girvetz, Evan H.; Greco, Steven E.; Larsen, Eric W.

2014-01-01

Environmental legislation in the US (i.e. NEPA) requires defining baseline conditions on current rather than historical ecosystem conditions. For ecosystems with long histories of multiple environmental impacts, this baseline method can subsequently lead to a significantly altered environment; this has been termed a ‘sliding baseline’. In river systems, cumulative effects caused by flow regulation, channel revetment and riparian vegetation removal significantly impact floodplain ecosystems by altering channel dynamics and precluding subsequent ecosystem processes, such as primary succession. To quantify these impacts on floodplain development processes, we used a model of river channel meander migration to illustrate the degree to which flow regulation and riprap impact migration rates, independently and synergistically, on the Sacramento River in California, USA. From pre-dam conditions, the cumulative effect of flow regulation alone on channel migration is a reduction by 38%, and 42–44% with four proposed water diversion project scenarios. In terms of depositional area, the proposed water project would reduce channel migration 51–71 ha in 130 years without current riprap in place, and 17–25 ha with riprap. Our results illustrate the utility of a modeling approach for quantifying cumulative impacts. Model-based quantification of environmental impacts allow scientists to separate cumulative and synergistic effects to analytically define mitigation measures. Additionally, by selecting an ecosystem process that is affected by multiple impacts, it is possible to consider process-based mitigation scenarios, such as the removal of riprap, to allow meander migration and create new floodplains and allow for riparian vegetation recruitment. PMID:24964145

Assessment of freshwater ecosystem services in the Beas River Basin, Himalayas region, India

NASA Astrophysics Data System (ADS)

Ncube, Sikhululekile; Beevers, Lindsay; Adeloye, Adebayo J.; Visser, Annie

2018-06-01

River systems provide a diverse range of ecosystem services, examples include: flood regulation (regulating), fish (provisioning), nutrient cycling (supporting) and recreation (cultural). Developing water resources through the construction of dams (hydropower or irrigation) can enhance the delivery of provisioning ecosystem services. However, these hydrologic alterations result in reductions in less tangible regulating, cultural and supporting ecosystem services. This study seeks to understand how multiple impoundments, abstractions and transfers within the upper Beas River Basin, Western Himalayas, India, are affecting the delivery of supporting ecosystem services. Whilst approaches for assessing supporting ecosystem services are under development, the immediate aim of this paper is to set out a framework for their quantification, using the macroinvertebrate index Lotic-Invertebrate Index for Flow Evaluation (LIFE). LIFE is a weighted measure of the flow velocity preferences of the macroinvertebrate community. Flow records from multiple gauging stations within the basin were used to investigate flow variability at seasonal, inter-annual and decadal time scales. The findings show that both mean monthly and seasonal cumulative flows have decreased over time in the Beas River Basin. A positive hydroecological relationship between LIFE and flow was also identified, indicative of macroinvertebrate response to seasonal changes in the flow regime. For example, high LIFE scores (7.7-9.3) in the winter and summer seasons indicate an abundance of macroinvertebrates with a preference for high flows; this represents a high potential for instream supporting ecosystem services delivery. However, further analysis is required to understand these hydroecological interactions in the study basin and the impact on instream supporting ecosystem services delivery.

76 FR 63837 - Special Local Regulation for Marine Events; Chesapeake Bay Workboat Race; Back River, Messick...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-10-14

... will establish special local regulation during the Chesapeake Bay Workboat Race, a series of boat races... to restrict vessel traffic during the power boat races on the Back River in the vicinity of Messick... approximately three hours on October 30, 2011 while the boat races are in progress. This regulated area should...

33 CFR 165.T01-0329 - Regulated Navigation Area; Maine Kennebec Bridge Construction and Removal, Kennebec River...

Code of Federal Regulations, 2014 CFR

2014-07-01

... notice, as well as Broadcast Notice to Mariners and Local Notice to Mariners. (2) Violations of this RNA... Regulated Navigation Area (RNA): All navigable waters, surface to bottom, on the Kennebec River within a 300....11 and 165.13 apply within the RNA. (2) In accordance with the general regulations, entry into or...

Reservoir and canal system regulation for operation of the Raymond Reservoir Hydro Project

DOE Office of Scientific and Technical Information (OSTI.GOV)

Miller, H.D.; Davidson, B.

1995-12-31

In 1989 LIMA Engineering Ltd. of Lethbridge, Alberta, Canada and Tudor Engineering Company of Oakland, California investigated the feasibility of installing a hydroelectric facility for the St. Mary River Irrigation District at Raymond Chute. This chute is a 29.3 m (96 ft) drop structure on the District`s main canal outside of the town of Raymond in southern Alberta. The chute discharges into the east end of Raymond Reservoir, a small regulating reservoir. The engineering team concluded that the project could be made more attractive by combining the drop at Raymond Chute with an additional 17.7 m (58 ft) of headmore » available at the upstream Milk River Ridge Reservoir. The result was the 20 MW Raymond Reservoir Hydro Project which went into commercial operation in May, 1994. Combining these two drops in elevation required the construction of a complete bypass system with a new approach canal and tailrace discharging into the west end of Raymond Reservoir, approximately 5 km (3 miles) west of the Raymond Chute. The system allows up to 56.7 cms (2,000 cfs) to be diverted through the powerhouse and thereby bypass Milk River Ridge Reservoir, Raymond Chute and approximately 6.5 km (4 miles) of canal. No synchronous bypass valve or spill facility was provided at the powerhouse. Rather, a system of rehabilitated or new check structures and controls were provided to automatically transfer flow from the power canal to the original system and thereby maintain a constant pre-set discharge downstream of the powerhouse following load rejections. This constant discharge is essential for meeting downstream irrigation demand.« less

Forging the Link: Using a Conservative Mixing Framework to Characterize Connections between Rivers and Great Lakes in River-lake Transition Zones

EPA Science Inventory

River-to-Great Lake transition zones are hydrologically, biogeochemically and biologically dynamic areas that regulate nutrient and energy fluxes between rivers and Great Lakes. Our goal is to characterize the biogeochemical properties of the river-lake transition zones and under...

76 FR 63858 - Drawbridge Operation Regulation; Trent River, New Bern, NC

Federal Register 2010, 2011, 2012, 2013, 2014

2011-10-14

... River Bridge Runs. This deviation allows the bridge to remain in the closed position to ensure safe..., Docket Operations, telephone 202-366-9826. SUPPLEMENTARY INFORMATION: The Neuse River Bridge Run... River, mile 0.0, at New Bern, NC. The route of the three Neuse River Bridge Run races cross the bridge...

43 CFR 431.7 - Administration and management of the Colorado River Dam Fund.

Code of Federal Regulations, 2012 CFR

2012-10-01

... Colorado River Dam Fund. 431.7 Section 431.7 Public Lands: Interior Regulations Relating to Public Lands... management of the Colorado River Dam Fund. Reclamation is responsible for the repayment of the Project and the administration of the Colorado River Dam Fund and the Lower Colorado River Basin Development Fund...

43 CFR 431.7 - Administration and management of the Colorado River Dam Fund.

Code of Federal Regulations, 2013 CFR

2013-10-01

... Colorado River Dam Fund. 431.7 Section 431.7 Public Lands: Interior Regulations Relating to Public Lands... management of the Colorado River Dam Fund. Reclamation is responsible for the repayment of the Project and the administration of the Colorado River Dam Fund and the Lower Colorado River Basin Development Fund...

43 CFR 431.7 - Administration and management of the Colorado River Dam Fund.

Code of Federal Regulations, 2014 CFR

2014-10-01

... Colorado River Dam Fund. 431.7 Section 431.7 Public Lands: Interior Regulations Relating to Public Lands... management of the Colorado River Dam Fund. Reclamation is responsible for the repayment of the Project and the administration of the Colorado River Dam Fund and the Lower Colorado River Basin Development Fund...

33 CFR 162.230 - Columbia River, Wash.

Code of Federal Regulations, 2011 CFR

2011-07-01

...) Grand Coulee Dam discharge channel; restricted area—(1) The area. That portion of the Columbia River between Grand Coulee Dam (situated at river mile 596.6) and river mile 593.7. (2) The regulations. (i) No.... Department of the Interior, Coulee Dam, Washington. ...

33 CFR 162.230 - Columbia River, Wash.

Code of Federal Regulations, 2010 CFR

2010-07-01

...) Grand Coulee Dam discharge channel; restricted area—(1) The area. That portion of the Columbia River between Grand Coulee Dam (situated at river mile 596.6) and river mile 593.7. (2) The regulations. (i) No.... Department of the Interior, Coulee Dam, Washington. ...

33 CFR 117.865 - Clatskanie River.

Code of Federal Regulations, 2010 CFR

2010-07-01

... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Oregon § 117.865 Clatskanie River. The draw of the... (Washington State Department of Fisheries and the Fish Commission of Oregon) for the Columbia River Fishery...

33 CFR 117.865 - Clatskanie River.

Code of Federal Regulations, 2012 CFR

2012-07-01

... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Oregon § 117.865 Clatskanie River. The draw of the... (Washington State Department of Fisheries and the Fish Commission of Oregon) for the Columbia River Fishery...

33 CFR 117.865 - Clatskanie River.

Code of Federal Regulations, 2013 CFR

2013-07-01

... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Oregon § 117.865 Clatskanie River. The draw of the... (Washington State Department of Fisheries and the Fish Commission of Oregon) for the Columbia River Fishery...

33 CFR 117.865 - Clatskanie River.

Code of Federal Regulations, 2011 CFR

2011-07-01

... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Oregon § 117.865 Clatskanie River. The draw of the... (Washington State Department of Fisheries and the Fish Commission of Oregon) for the Columbia River Fishery...

33 CFR 117.865 - Clatskanie River.

Code of Federal Regulations, 2014 CFR

2014-07-01

... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Oregon § 117.865 Clatskanie River. The draw of the... (Washington State Department of Fisheries and the Fish Commission of Oregon) for the Columbia River Fishery...

33 CFR 165.150 - New Haven Harbor, Quinnipiac River, Mill River.

Code of Federal Regulations, 2010 CFR

2010-07-01

... River, Mill River. 165.150 Section 165.150 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF... New Haven Harbor, Quinnipiac River, Mill River. (a) The following is a regulated navigation area: The... 303°T to point D at the west bank of the mouth of the Mill River 41°18′05″ N, 72°54′23″ W thence south...

A century of hydrological variability and trends in the Fraser River Basin

NASA Astrophysics Data System (ADS)

Déry, Stephen J.; Hernández-Henríquez, Marco A.; Owens, Philip N.; Parkes, Margot W.; Petticrew, Ellen L.

2012-06-01

This study examines the 1911-2010 variability and trends in annual streamflow at 139 sites across the Fraser River Basin (FRB) of British Columbia (BC), Canada. The Fraser River is the largest Canadian waterway flowing to the Pacific Ocean and is one of the world’s greatest salmon rivers. Our analyses reveal high runoff rates and low interannual variability in alpine and coastal rivers, and low runoff rates and high interannual variability in most streams in BC’s interior. The interannual variability in streamflow is also low in rivers such as the Adams, Chilko, Quesnel and Stuart where the principal salmon runs of the Fraser River occur. A trend analysis shows a spatially coherent signal with increasing interannual variability in streamflow across the FRB in recent decades, most notably in spring and summer. The upward trend in the coefficient of variation in annual runoff coincides with a period of near-normal annual runoff for the Fraser River at Hope. The interannual variability in streamflow is greater in regulated rather than natural systems; however, it is unclear whether it is predominantly flow regulation that leads to these observed differences. Environmental changes such as rising air temperatures, more frequent polarity changes in large-scale climate teleconnections such as El Niño-Southern Oscillation and Pacific Decadal Oscillation, and retreating glaciers may be contributing to the greater range in annual runoff fluctuations across the FRB. This has implications for ecological processes throughout the basin, for example affecting migrating and spawning salmon, a keystone species vital to First Nations communities as well as to commercial and recreational fisheries. To exemplify this linkage between variable flows and biological responses, the unusual FRB runoff anomalies observed in 2010 are discussed in the context of that year’s sockeye salmon run. As the climate continues to warm, greater variability in annual streamflow, and hence in hydrological extremes, may influence ecological processes and human usage throughout the FRB in the 21st century.

Effects of water flow regulation on ecosystem functioning in a Mediterranean river network assessed by wood decomposition.

PubMed

Abril, Meritxell; Muñoz, Isabel; Casas-Ruiz, Joan P; Gómez-Gener, Lluís; Barceló, Milagros; Oliva, Francesc; Menéndez, Margarita

2015-06-01

Mediterranean rivers are extensively modified by flow regulation practises along their courses. An important part of the river impoundment in this area is related to the presence of small dams constructed mainly for water abstraction purposes. These projects drastically modified the ecosystem morphology, transforming lotic into lentic reaches and increasing their alternation along the river. Hydro-morphologial differences between these reaches indicate that flow regulation can trigger important changes in the ecosystem functioning. Decomposition of organic matter is an integrative process and this complexity makes it a good indicator of changes in the ecosystem. The aim of this study was to assess the effect caused by flow regulation on ecosystem functioning at the river network scale, using wood decomposition as a functional indicator. We studied the mass loss from wood sticks during three months in different lotic and lentic reaches located along a Mediterranean river basin, in both winter and summer. Additionally, we identified the environmental factors affecting decomposition rates along the river orders. The results revealed differences in decomposition rates between sites in both seasons that were principally related to the differences between stream orders. The rates were mainly related to temperature, nutrient concentrations (NO2(-), NO3(2-)) and water residence time. High-order streams with higher temperature and nutrient concentrations exhibited higher decomposition rates compared with low-order streams. The effect of the flow regulation on the decomposition rates only appeared to be significant in high orders, especially in winter, when the hydrological characteristics of lotic and lentic habitats widely varied. Lotic reaches with lower water residence time exhibited greater decomposition rates compared with lentic reaches probably due to more physical abrasion and differences in the microbial assemblages. Overall, our study revealed that in high orders the reduction of flow caused by flow regulation affects the wood decomposition indicating changes in ecosystem functioning. Copyright © 2015 Elsevier B.V. All rights reserved.

33 CFR 117.700 - Piscataqua River.

Code of Federal Regulations, 2014 CFR

2014-07-01

... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements New Hampshire § 117.700 Piscataqua River. See § 117.531, Piscataqua River, listed under Maine. [CGD 92-015, 57 FR 37880, Aug. 21, 1992] New Jersey ...

33 CFR 117.700 - Piscataqua River.

Code of Federal Regulations, 2012 CFR

2012-07-01

... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements New Hampshire § 117.700 Piscataqua River. See § 117.531, Piscataqua River, listed under Maine. [CGD 92-015, 57 FR 37880, Aug. 21, 1992] New Jersey ...

33 CFR 117.700 - Piscataqua River.

Code of Federal Regulations, 2013 CFR

2013-07-01

... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements New Hampshire § 117.700 Piscataqua River. See § 117.531, Piscataqua River, listed under Maine. [CGD 92-015, 57 FR 37880, Aug. 21, 1992] New Jersey ...

33 CFR 117.700 - Piscataqua River.

Code of Federal Regulations, 2011 CFR

2011-07-01

... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements New Hampshire § 117.700 Piscataqua River. See § 117.531, Piscataqua River, listed under Maine. [CGD 92-015, 57 FR 37880, Aug. 21, 1992] New Jersey ...

33 CFR 117.700 - Piscataqua River.

Code of Federal Regulations, 2010 CFR

2010-07-01

... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements New Hampshire § 117.700 Piscataqua River. See § 117.531, Piscataqua River, listed under Maine. [CGD 92-015, 57 FR 37880, Aug. 21, 1992] New Jersey ...

Update on Regulation of Sand Transport in the Colorado River by Changes in the Surface Grain Size of Eddy Sandbars over Multiyear Timescales

USGS Publications Warehouse

Topping, David J.; Rubin, David M.; Schmidt, John C.

2008-01-01

In settings where the transport of sand is partially or fully supply limited, changes in the upstream supply of sand are coupled to changes in the grain size of sand on the bed. In this manner, the transport of sand under the supply-limited case is ?grain-size regulated.? Since the closure of Glen Canyon Dam in 1963, the downstream reach of the Colorado River in Marble and Grand Canyons has exhibited evidence of sand-supply limitation. Sand transport in the river is now about equally regulated by changes in the discharge of water and changes in the grain sizes of sand on the channel bed and eddy sandbars. Previous work has shown that changes in the grain size of sand on the channel bed (driven by changes in the upstream supply of sand owing to both tributary floods and high dam releases) are important in regulating sand transport over timescales of days to months. In this study, suspended-sand data are analyzed in conjunction with bed grain-size data to determine whether changes in the sand grain size on the channel bed, or changes in the sand grain size on the surface of eddy sandbars, have been more important in regulating sand transport in the postdam Colorado River over longer, multiyear timescales. The results of this study show that this combined theory- and field-based approach can be used to deduce which environments in a complicated setting are most important for regulating sediment transport. In the case of the regulated Colorado River in Marble and upper Grand Canyons, suspended-sand transport has been regulated mostly by changes in the surface grain size of eddy sandbars.

75 FR 37307 - Drawbridge Operation Regulation; Black River, Port Huron, MI

Federal Register 2010, 2011, 2012, 2013, 2014

2010-06-29

... from the regulation governing the operation of the Military Street Bridge at Mile 0.33, 7th Street Bridge at Mile 0.50, and the 10th Street Bridge at Mile 0.94 over the Black River, at Port Huron, MI...

33 CFR 117.881 - John Day River.

Code of Federal Regulations, 2013 CFR

2013-07-01

... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Oregon § 117.881 John Day River. The draw of the... (Washington State Department of Fisheries and the Fish Commission of Oregon) for the Columbia River Fishery...

33 CFR 117.881 - John Day River.

Code of Federal Regulations, 2014 CFR

2014-07-01

... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Oregon § 117.881 John Day River. The draw of the... (Washington State Department of Fisheries and the Fish Commission of Oregon) for the Columbia River Fishery...

33 CFR 117.881 - John Day River.

Code of Federal Regulations, 2012 CFR

2012-07-01

... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Oregon § 117.881 John Day River. The draw of the... (Washington State Department of Fisheries and the Fish Commission of Oregon) for the Columbia River Fishery...

Organic compounds assessed in Chattahoochee River water used for public supply near Atlanta, Georgia, 2004-05

USGS Publications Warehouse

Hughes, W. Brian; Younker, Cristal L.

2011-01-01

An investigation by the U.S. Geological Survey (USGS) National Water-Quality Assessment (NAWQA) Program characterized the occurrence of 266 organic compounds in source water and finished water from the Chattahoochee River, which is the main water-supply source for the Atlanta metropolitan area. Source water is stream water collected at a surface-water intake prior to water treatment, and finished water is water that has passed through treatment processes prior to distribution. Samples were collected approximately monthly during 2004-05 and included 15 paired source-water and finished-water samples. Samples were collected during winter-spring high flow and summer-fall low flow, but storm events were not targeted during this Source Water-Quality Assessment (SWQA) study. Samples were analyzed for pesticides and degradates, gasoline hydrocarbons, solvents, disinfection by-products, personal care and domestic-use products, and other organic compounds. Community water systems are required to monitor regulated organic compounds under the Safe Drinking Water Act of 1996 (U.S. Environmental Protection Agency, 1998); however, most compounds included in this study are not regulated by Federal drinking-water standards (U.S. Environmental Protection Agency, 2007a). The Chattahoochee River study is part of an ongoing NAWQA investigation of community water systems across the United States. Additional details about the national study are given in Carter and others (2007).

75 FR 30296 - Special Local Regulation for Marine Event; Maryland Swim for Life, Chester River, Chestertown, MD

Federal Register 2010, 2011, 2012, 2013, 2014

2010-06-01

...-AA08 Special Local Regulation for Marine Event; Maryland Swim for Life, Chester River, Chestertown, MD... Chestertown, MD during the Maryland Swim for Life. Special local regulations are necessary to provide for the safety of life on navigable waters during the event. DATES: This rule is effective from 5:30 a.m. to 2:30...

33 CFR 165.817 - Arkansas River, Mile 118.2 to 125.4, Little Rock Arkansas-regulated navigation area.

Code of Federal Regulations, 2012 CFR

2012-07-01

... so as to avoid a meeting situation in the RNA. (d) Refer to 33 CFR 117.123 for drawbridge operation... navigation area. (a) Location. The following is a regulated navigation area (RNA): The waters of the Arkansas River between mile 118.2 and mile 125.4. (b) Regulations. Transit of the RNA is limited during periods...

33 CFR 165.817 - Arkansas River, Mile 118.2 to 125.4, Little Rock Arkansas-regulated navigation area.

Code of Federal Regulations, 2011 CFR

2011-07-01

... so as to avoid a meeting situation in the RNA. (d) Refer to 33 CFR 117.123 for drawbridge operation... navigation area. (a) Location. The following is a regulated navigation area (RNA): The waters of the Arkansas River between mile 118.2 and mile 125.4. (b) Regulations. Transit of the RNA is limited during periods...

33 CFR 165.817 - Arkansas River, Mile 118.2 to 125.4, Little Rock Arkansas-regulated navigation area.

Code of Federal Regulations, 2014 CFR

2014-07-01

... so as to avoid a meeting situation in the RNA. (d) Refer to 33 CFR 117.123 for drawbridge operation... navigation area. (a) Location. The following is a regulated navigation area (RNA): The waters of the Arkansas River between mile 118.2 and mile 125.4. (b) Regulations. Transit of the RNA is limited during periods...

33 CFR 165.817 - Arkansas River, Mile 118.2 to 125.4, Little Rock Arkansas-regulated navigation area.

Code of Federal Regulations, 2013 CFR

2013-07-01

... so as to avoid a meeting situation in the RNA. (d) Refer to 33 CFR 117.123 for drawbridge operation... navigation area. (a) Location. The following is a regulated navigation area (RNA): The waters of the Arkansas River between mile 118.2 and mile 125.4. (b) Regulations. Transit of the RNA is limited during periods...

33 CFR 165.817 - Arkansas River, Mile 118.2 to 125.4, Little Rock Arkansas-regulated navigation area.

Code of Federal Regulations, 2010 CFR

2010-07-01

... so as to avoid a meeting situation in the RNA. (d) Refer to 33 CFR 117.123 for drawbridge operation... navigation area. (a) Location. The following is a regulated navigation area (RNA): The waters of the Arkansas River between mile 118.2 and mile 125.4. (b) Regulations. Transit of the RNA is limited during periods...

33 CFR 110.224 - San Francisco Bay, San Pablo Bay, Carquinez Strait, Suisun Bay, Sacramento River, San Joaquin...

Code of Federal Regulations, 2014 CFR

2014-07-01

... Bay, Sacramento River, San Joaquin River, and connecting waters, CA. (a) General regulations. (1..., Carquinez Strait, Suisun Bay, Sacramento River, San Joaquin River, and connecting waters, CA. 110.224... notified to move by the Captain of the Port. (4) No vessel may anchor within a tunnel, cable, or pipeline...

33 CFR 110.224 - San Francisco Bay, San Pablo Bay, Carquinez Strait, Suisun Bay, Sacramento River, San Joaquin...

Code of Federal Regulations, 2013 CFR

2013-07-01

... Bay, Sacramento River, San Joaquin River, and connecting waters, CA. (a) General regulations. (1..., Carquinez Strait, Suisun Bay, Sacramento River, San Joaquin River, and connecting waters, CA. 110.224... notified to move by the Captain of the Port. (4) No vessel may anchor within a tunnel, cable, or pipeline...

33 CFR 110.224 - San Francisco Bay, San Pablo Bay, Carquinez Strait, Suisun Bay, Sacramento River, San Joaquin...

Code of Federal Regulations, 2012 CFR

2012-07-01

... Bay, Sacramento River, San Joaquin River, and connecting waters, CA. (a) General regulations. (1..., Carquinez Strait, Suisun Bay, Sacramento River, San Joaquin River, and connecting waters, CA. 110.224... notified to move by the Captain of the Port. (4) No vessel may anchor within a tunnel, cable, or pipeline...

33 CFR 207.10 - Charles River, Mass.; dam of Charles River Basin Commission.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Charles River, Mass.; dam of Charles River Basin Commission. 207.10 Section 207.10 Navigation and Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE NAVIGATION REGULATIONS § 207.10 Charles River, Mass.; dam of...

33 CFR 334.570 - Banana River near Orsino, Fla.; restricted area.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 33 Navigation and Navigable Waters 3 2012-07-01 2012-07-01 false Banana River near Orsino, Fla... THE ARMY, DEPARTMENT OF DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.570 Banana River near Orsino, Fla.; restricted area. (a) The area. That part of Banana River N of the NASA Banana River...

33 CFR 334.570 - Banana River near Orsino, Fla.; restricted area.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 3 2011-07-01 2011-07-01 false Banana River near Orsino, Fla... THE ARMY, DEPARTMENT OF DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.570 Banana River near Orsino, Fla.; restricted area. (a) The area. That part of Banana River N of the NASA Banana River...

33 CFR 334.570 - Banana River near Orsino, Fla.; restricted area.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 33 Navigation and Navigable Waters 3 2014-07-01 2014-07-01 false Banana River near Orsino, Fla... THE ARMY, DEPARTMENT OF DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.570 Banana River near Orsino, Fla.; restricted area. (a) The area. That part of Banana River N of the NASA Banana River...

33 CFR 334.570 - Banana River near Orsino, Fla.; restricted area.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Banana River near Orsino, Fla... THE ARMY, DEPARTMENT OF DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.570 Banana River near Orsino, Fla.; restricted area. (a) The area. That part of Banana River N of the NASA Banana River...

33 CFR 334.570 - Banana River near Orsino, Fla.; restricted area.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 33 Navigation and Navigable Waters 3 2013-07-01 2013-07-01 false Banana River near Orsino, Fla... THE ARMY, DEPARTMENT OF DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.570 Banana River near Orsino, Fla.; restricted area. (a) The area. That part of Banana River N of the NASA Banana River...

33 CFR 207.10 - Charles River, Mass.; dam of Charles River Basin Commission.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 3 2011-07-01 2011-07-01 false Charles River, Mass.; dam of Charles River Basin Commission. 207.10 Section 207.10 Navigation and Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE NAVIGATION REGULATIONS § 207.10 Charles River, Mass.; dam of...

Multi-timescale sediment responses across a human impacted river-estuary system

NASA Astrophysics Data System (ADS)

Chen, Yining; Chen, Nengwang; Li, Yan; Hong, Huasheng

2018-05-01

Hydrological processes regulating sediment transport from land to sea have been widely studied. However, anthropogenic factors controlling the river flow-sediment regime and subsequent response of the estuary are still poorly understood. Here we conducted a multi-timescale analysis on flow and sediment discharges during the period 1967-2014 for the two tributaries of the Jiulong River in Southeast China. The long-term flow-sediment relationship remained linear in the North River throughout the period, while the linearity showed a remarkable change after 1995 in the West River, largely due to construction of dams and reservoirs in the upland watershed. Over short timescales, rainstorm events caused the changes of suspended sediment concentration (SSC) in the rivers. Regression analysis using synchronous SSC data in a wet season (2009) revealed a delayed response (average 5 days) of the estuary to river input, and a box-model analysis established a quantitative relationship to further describe the response of the estuary to the river sediment input over multiple timescales. The short-term response is determined by both the vertical SSC-salinity changes and the sediment trapping rate in the estuary. However, over the long term, the reduction of riverine sediment yield increased marine sediments trapped into the estuary. The results of this study indicate that human activities (e.g., dams) have substantially altered sediment delivery patterns and river-estuary interactions at multiple timescales.

Fish and fisheries in the Lower Rhine 1550-1950: A historical-ecological perspective.

PubMed

Lenders, H J Rob

2017-11-01

Regulation and intensive use of most of the world's large rivers, has led to dramatic decline and even to extinction of riverine fish populations like salmon and sturgeon in the river Rhine. In general this decline is considered an unwelcome side-effect of the Industrial Revolution and large-scale river regulation (c. 1800), but the deterioration of stocks of some species may have started well before the 19th century. For the river Rhine, data on fish landings as proxies of abundance in the period 1550-1950 can be derived from historical market prices, fisheries taxation and fishery and fish auctions statistics, especially for commercially interesting species like Atlantic salmon, sturgeon, Allis shad and Twaite shad. Most data from which abundance of these species can be derived, however, appear to be missing in historical sources until decline of the investigated species sets in and the species become economically scarce goods. Atlantic salmon in the Rhine catchment appears to be already in decline during Early Modern Times (post 1500 AD) after which time river regulation, pollution and intensified fisheries finished off the remaining stocks in the 20th century. Salmon decline caused a cascade in the River Rhine ecosystem as fisheries shifted to, especially, Allis shad and Twaite shad, followed by (near-)extinction of these species. Dropping yields of salmon fishery did not lead to increased sturgeon fishery, although numbers of sturgeon also dwindled to extinction in the river Rhine. The onset of sturgeon decline appears to coincide with the period of the first large regulation works. It is shown that historical-ecological data on fish abundance can quantitatively underpin detrimental long-term processes in river ecosystems. Copyright © 2016 Elsevier Ltd. All rights reserved.

Water-quality control, monitoring and wastewater treatment in Lithuania 1950 to 1999.

PubMed

Cetkauskaite, A; Zarkov, D; Stoskus, L

2001-08-01

The Lithuanian water-management system developed on the basis of Soviet regulations in 1950-1990. Surface-water quality monitoring started in the 1950s, and the system was improved in the 1960s. Today, 48 rivers are being monitored using up to 70 parameters. Statutory monitoring of discharges started in 1962, wastewater standards were issued in 1957 and 1966, and then revised in 1996. Wastewater-treatment plants were built first in rural areas, in factories since the 1950s, and later in towns. Since 1991, large capacity municipal plants have been constructed with foreign assistance. Water quality has improved in some rivers since 1970, but Lithuania's main river, Nemunas, remains moderately polluted. The lower Nemunas is especially affected by discharges of municipal and industrial wastewater from Sovietsk and Neman (Russia), which account for half of the total loading. Hydrobiological data of 1994-1998 indicated the eutrophication of the Curonian Lagoon, and bacteriological pollution and blue-green algae blooms in the Baltic Sea north of Klaipeda.

Riparian vegetation, Colorado River, and climate: five decades of spatiotemporal dynamics in the Grand Canyon with river regulation

USGS Publications Warehouse

Sankey, Joel B.; Ralston, Barbara E.; Grams, Paul E.; Schmidt, John C.; Cagney, Laura E.

2015-01-01

Documentation of the interacting effects of river regulation and climate on riparian vegetation has typically been limited to small segments of rivers or focused on individual plant species. We examine spatiotemporal variability in riparian vegetation for the Colorado River in Grand Canyon relative to river regulation and climate, over the five decades since completion of the upstream Glen Canyon Dam in 1963. Long-term changes along this highly modified, large segment of the river provide insights for management of similar riparian ecosystems around the world. We analyze vegetation extent based on maps and imagery from eight dates between 1965 and 2009, coupled with the instantaneous hydrograph for the entire period. Analysis confirms a net increase in vegetated area since completion of the dam. Magnitude and timing of such vegetation changes are river stage-dependent. Vegetation expansion is coincident with inundation frequency changes and is unlikely to occur for time periods when inundation frequency exceeds approximately 5%. Vegetation expansion at lower zones of the riparian area is greater during the periods with lower peak and higher base flows, while vegetation at higher zones couples with precipitation patterns and decreases during drought. Short pulses of high flow, such as the controlled floods of the Colorado River in 1996, 2004, and 2008, do not keep vegetation from expanding onto bare sand habitat. Management intended to promote resilience of riparian vegetation must contend with communities that are sensitive to the interacting effects of altered flood regimes and water availability from river and precipitation.

Riparian vegetation, Colorado River, and climate: Five decades of spatiotemporal dynamics in the Grand Canyon with river regulation

NASA Astrophysics Data System (ADS)

Sankey, Joel B.; Ralston, Barbara E.; Grams, Paul E.; Schmidt, John C.; Cagney, Laura E.

2015-08-01

Documentation of the interacting effects of river regulation and climate on riparian vegetation has typically been limited to small segments of rivers or focused on individual plant species. We examine spatiotemporal variability in riparian vegetation for the Colorado River in Grand Canyon relative to river regulation and climate, over the five decades since completion of the upstream Glen Canyon Dam in 1963. Long-term changes along this highly modified, large segment of the river provide insights for management of similar riparian ecosystems around the world. We analyze vegetation extent based on maps and imagery from eight dates between 1965 and 2009, coupled with the instantaneous hydrograph for the entire period. Analysis confirms a net increase in vegetated area since completion of the dam. Magnitude and timing of such vegetation changes are river stage-dependent. Vegetation expansion is coincident with inundation frequency changes and is unlikely to occur for time periods when inundation frequency exceeds approximately 5%. Vegetation expansion at lower zones of the riparian area is greater during the periods with lower peak and higher base flows, while vegetation at higher zones couples with precipitation patterns and decreases during drought. Short pulses of high flow, such as the controlled floods of the Colorado River in 1996, 2004, and 2008, do not keep vegetation from expanding onto bare sand habitat. Management intended to promote resilience of riparian vegetation must contend with communities that are sensitive to the interacting effects of altered flood regimes and water availability from river and precipitation.

Application of two quality indices as monitoring and management tools of rivers. Case study: the Imera Meridionale River, Italy.

PubMed

Bonanno, Giuseppe; Lo Giudice, Rosa

2010-04-01

On the basis of the European Water Framework Directive (2000/60), the water resources of the member states of the European Community should reach good quality standards by 2015. Although such regulations illustrate the basic points for a comprehensive and effective policy of water monitoring and management, no practical tools are provided to face and solve the issues concerning freshwater ecosystems such as rivers. The Italian government has developed a set of regulations as adoption of the European Directive but failed to indicate feasible procedures for river monitoring and management. On a local scale, Sicilian authorities have implemented monitoring networks of watersheds, aiming at describing the general conditions of rivers. However, such monitoring programs have provided a relatively fragmentary picture of the ecological conditions of the rivers. In this study, the integrated use of environmental quality indices is proposed as a methodology able to provide a practical approach to river monitoring and management. As a case study, the Imera Meridionale River, Sicily's largest river, was chosen. The water quality index developed by the U.S. National Sanitation Foundation and the floristic quality index based on the Wilhelm method were applied. The former enabled us to describe the water quality according to a spatial-temporal gradient, whereas the latter focused on the ecological quality of riparian vegetation. This study proposes a holistic view of river ecosystems by considering biotic and abiotic factors in agreement with the current European regulations. How the combined use of such indices can guide sustainable management efforts is also discussed.

Legacy Sediments in U.S. River Environments: Atrazine and Aggradation to Zinc and Zoobenthos

NASA Astrophysics Data System (ADS)

Wohl, E.

2014-12-01

Legacy sediments are those that are altered by human activities. Alterations include (i) human-caused aggradation (and subsequent erosion), such as sediment accumulating upstream from relict or contemporary dams, (ii) human-caused lack of continuing deposition that results in changing moisture and nutrient levels within existing sediments, such as on floodplains that no longer receive lateral or vertical accretion deposits because of levees, bank stabilization, and other channel engineering, and (iii) human-generated contaminants such as PCBs and pesticides that adsorb to fine sediment. Existing estimates of human alterations of river systems suggest that legacy sediments are ubiquitous. Only an estimated 2% of river miles in the United States are not affected by flow regulation that alters sediment transport, for example, and less than half of major river basins around the world are minimally altered by flow regulation. Combined with extensive but poorly documented reduction in floodplain sedimentation, as well as sediment contamination by diverse synthetic compounds, excess nutrients, and heavy metals, these national and global estimates suggest that legacy sediments now likely constitute a very abundant type of fluvial sediment. Because legacy sediments can alter river form and function for decades to centuries after the cessation of the human activity that created the legacy sediments, river management and restoration must be informed by accurate knowledge of the distribution and characteristics of legacy sediments. Geomorphologists can contribute understanding of sediment dynamics, including: the magnitude, frequency, and duration of flows that mobilize sediments with adsorbed contaminants; sites where erosion and deposition are most likely to occur under specified flow and sediment supply; residence time of sediments; and the influence of surface and subsurface water fluxes on sediment stability and geochemistry.

Interior Least Tern (Sternula antillarum) breeding distribution and ecology: implications for population-level studies and the evaluation of alternative management strategies on large, regulated rivers

PubMed Central

Lott, Casey A; Wiley, Robert L; Fischer, Richard A; Hartfield, Paul D; Scott, J Michael

2013-01-01

Interior Least Terns (Sternula antillarum) (ILT) are colonial, fish-eating birds that breed within active channels of large sand bed rivers of the Great Plains and in the Lower Mississippi Valley. Multipurpose dams, irrigation structures, and engineered navigation systems have been present on these rivers for many decades. Despite severe alteration of channels and flow regimes, regulation era floods have remained effective at maintaining bare sandbar nesting habitat on many river segments and ILT populations have been stable or expanding since they were listed as endangered in 1985. We used ILT breeding colony locations from 2002 to 2012 and dispersal information to identify 16 populations and 48 subpopulations. More than 90% of ILT and >83% of river km with suitable nesting habitat occur within the two largest populations. However, replicate populations remain throughout the entire historical, geophysical, and ecological range of ILT. Rapid colonization of anthropogenic habitats in areas that were not historically occupied suggests metapopulation dynamics. The highest likelihood of demographic connectivity among ILT populations occurs across the Southern Plains and the Lower Mississippi River, which may be demographically connected with Least Tern populations on the Gulf Coast. Paired ecological and bird population models are needed to test whether previously articulated threats limit ILT population growth and to determine if management intervention is necessary and where. Given current knowledge, the largest sources of model uncertainty will be: (1) uncertainty in relationships between high flow events and subsequent sandbar characteristics and (2) uncertainty regarding the frequency of dispersal among population subunits. We recommend research strategies to reduce these uncertainties. PMID:24223295

76 FR 37041 - Drawbridge Operation Regulation; Apponagansett River, Dartmouth, MA

Federal Register 2010, 2011, 2012, 2013, 2014

2011-06-24

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-0335] RIN 1625-AA09 Drawbridge Operation Regulation; Apponagansett River, Dartmouth, MA AGENCY: Coast Guard, DHS. ACTION: Notice of proposed rulemaking. SUMMARY: The Coast Guard proposes to change the drawbridge...

Geomorphic response to flow regulation and channel and floodplain alteration in the gravel-bedded Cedar River, Washington, USA

USGS Publications Warehouse

Gendaszek, Andrew S.; Magirl, Christopher S.; Czuba, Christiana R.

2012-01-01

Decadal- to annual-scale analyses of changes to the fluvial form and processes of the Cedar River in Washington State, USA, reveal the effects of flow regulation, bank stabilization, and log-jam removal on a gravel-bedded river in a temperate climate. During the twentieth century, revetments were built along ~ 60% of the lower Cedar River's length and the 2-year return period flow decreased by 47% following flow regulation beginning in 1914. The formerly wide, anastomosing channel narrowed by over 50% from an average of 47 m in 1936 to 23 m in 1989 and became progressively single threaded. Subsequent high flows and localized revetment removal contributed to an increase in mean channel width to about 34 m by 2011. Channel migration rates between 1936 and 2011 were up to 8 m/year in reaches not confined by revetments or valley walls and less than analysis uncertainty throughout most of the Cedar River's length where bank armoring restricted channel movement. In unconfined reaches where large wood and sediment can be recruited, contemporary high flows, though smaller in magnitude than preregulation high flows, form and maintain geomorphic features such as pools, gravel bars, and side channels. Reaches confined by revetments remain mostly unmodified in the regulated flow regime. While high flows are important for maintaining channel dynamics in the Cedar River, their effectiveness is currently reduced by revetments, limited sediment supply, the lack of large wood available for recruitment to the channel, and decreased magnitude since flow regulation.

Graphical method for estimating occurrence and duration of a critical low flow in the Sacramento River at Freeport, California

USGS Publications Warehouse

Harmon, J.G.

1983-01-01

Sacramento County expects to begin operation of the Sacramento Regional Wastewater Treatment Plant in 1982. The California State Water Resources Control Board has ruled that the plant will not be allowed to release effluent into the Sacramento River when flow in the river is 4,000 cubic feet per second or less. Depending on tide condition, flows less than 4,000 cubic feet per second may occur either once or twice during each 24-hour 50-minute tide cycle when the daily mean flow is less than about 12,000 cubic feet per second. Daily means flows less than 12,000 cubic feet per second occur about 28% of the time. Riverflow at the plant outfall is monitored by an acoustic streamflow-measuring system. Regulation of effluent released from the plant will normally be based on real-time flow data computed by the acoustic system. A graphical method for determining the occurrence and duration of flows of 4,000 cubic feet per second and less was developed as a backup system to be used if a temporary failure in the acoustic system occurs. (USGS)

78 FR 78717 - Reservoirs at Headwaters of the Mississippi River; Use and Administration

Federal Register 2010, 2011, 2012, 2013, 2014

2013-12-27

... regulations governing operation of the reservoirs on February 11, 1931, which were codified at 33 CFR 207.340... absolute upper limit on reservoir operations, effectively providing a band within which the Corps may... plans for the Headwaters reservoirs in an attempt to improve the operation of the system while balancing...

RiverCare: towards self-sustaining multifunctional rivers

NASA Astrophysics Data System (ADS)

Augustijn, Denie; Schielen, Ralph; Hulscher, Suzanne

2014-05-01

Rivers are inherently dynamic water systems involving complex interactions among hydrodynamics, morphology and ecology. In many deltas around the world lowland rivers are intensively managed to meet objectives like safety, navigation, hydropower and water supply. With the increasing pressure of growing population and climate change it will become even more challenging to reach or maintain these objectives and probably also more demanding from a management point of view. In the meantime there is a growing awareness that rivers are natural systems and that, rather than further regulation works, the dynamic natural processes should be better utilized (or restored) to reach the multifunctional objectives. Currently many integrated river management projects are initiated all over the world, in large rivers as well as streams. Examples of large scale projects in the Netherlands are 'Room for the River' (Rhine), the 'Maaswerken' (Meuse), the Deltaprogramme and projects originating from the European Water Framework Directive (WFD). These projects include innovative measures executed never before on this scale and include for example longitudinal training dams, side channels, removal of bank protection, remeandering of streams, dredging/nourishment and floodplain rehabilitation. Although estimates have been made on the effects of these measures for many of the individual projects, the overall effects on the various management objectives remains uncertain, especially if all projects are considered in connection. For all stakeholders with vested interests in the river system it is important to know how that system evolves at intermediate and longer time scales (10 to 100 years) and what the consequences will be for the various river functions. If the total, integrated response of the system can be predicted, the system may be managed in a more effective way, making optimum use of natural processes. In this way, maintenance costs may be reduced, the system remains more natural and more self-sustaining and ecosystem services such as safety, navigability, biodiversity and climate buffering can be safeguarded or even enhanced. The unprecedented extent of these interventions, together with comprehensive in-situ monitoring now offer an excellent opportunity to gain extensive knowledge about their intermediate and long-term impacts. RiverCare is a large research programme that will start in 2014 in which 5 universities, the Ministry of Infrastructure and Environment, Deltares, consultancy firms and other public and private parties collaborate to get a better understanding of the fundamental processes that drive ecomorphological changes, predict the intermediate and long-term developments, make uncertainties explicit and reduce them where possible and develop best practices to reduce the maintenance costs and increase the benefits of interventions. The projects currently or soon to be carried out in the Netherlands provide a unique opportunity to achieve these objectives and use the results to develop or improve models, guidelines and tools that can be used for river management in the Netherlands and abroad.

33 CFR 117.1058 - Snake River.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Snake River. 117.1058 Section 117... OPERATION REGULATIONS Specific Requirements Washington § 117.1058 Snake River. (a) The draw of the Burlington Northern Santa Fe railroad bridge across the Snake River at mile 1.5 between Pasco and Burbank is...

Effect of Main-stem Dams on Zooplankton Communities of the Missouri River (USA)

EPA Science Inventory

We examined the distribution and abundance of zooplankton from 146 sites on the Missouri River and found large shifts in the dominance of major taxa between management zones of this regulated river. Crustacean zooplankton were dominant in the inter-reservoir zone of the river, an...

33 CFR 117.1099 - St. Croix River.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false St. Croix River. 117.1099 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Wisconsin § 117.1099 St. Croix River. See § 117.667, St. Croix River, listed under Minnesota. [CGD 92-015, 57 FR 37880, Aug. 21, 1992] ...

77 FR 57024 - Drawbridge Operation Regulation; Tombigbee River, AL

Federal Register 2010, 2011, 2012, 2013, 2014

2012-09-17

... lift span bridge across the Tombigbee River at Naheola, Marengo and Choctaw Counties, Alabama. The... MNBR vertical lift span bridge crosses the Tombigbee River at mile 128.6 (Black Warrior Tombigbee... Meridian and Bigbee Railroad (MNBR) vertical lift span bridge across the Tombigbee River, mile 128.6 (Black...

77 FR 25655 - Drawbridge Operation Regulation; Tombigbee River, AL

Federal Register 2010, 2011, 2012, 2013, 2014

2012-05-01

... Meridian and Bigbee Railroad (MNBR) vertical lift span bridge across the Tombigbee River at Naheola... The MNBR vertical lift span bridge crosses the Tombigbee River at mile 128.6 (Black Warrior Tombigbee... Railroad (MNBR) vertical lift span bridge across the Tombigbee River, mile 128.6 (Black Warrior Tombigbee...

33 CFR 117.391 - Chicago River.

Code of Federal Regulations, 2010 CFR

2010-07-01

... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Illinois § 117.391 Chicago River. The draws of the bridges operated by the City of Chicago over the Main Branch of Chicago River, the bridges on the North... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Chicago River. 117.391 Section...

77 FR 37316 - Drawbridge Operation Regulation; Trent River, New Bern, NC

Federal Register 2010, 2011, 2012, 2013, 2014

2012-06-21

... navigation position for 3 hours to accommodate the annual Neuse River Bridge Run. DATES: This deviation is...) 366-9826. SUPPLEMENTARY INFORMATION: The Event Director for the Neuse River Bridge Run, with approval... temporary deviation from the current operating schedule to accommodate the Neuse River Bridge Run. The...

33 CFR 117.1105 - Wisconsin River.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Wisconsin River. 117.1105 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Wisconsin § 117.1105 Wisconsin River. The draws of each drawbridge across the Wisconsin River shall open on signal if at least 48 hours notice is given. ...

33 CFR 117.1105 - Wisconsin River.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Wisconsin River. 117.1105 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Wisconsin § 117.1105 Wisconsin River. The draws of each drawbridge across the Wisconsin River shall open on signal if at least 48 hours notice is given. ...

33 CFR 117.1105 - Wisconsin River.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Wisconsin River. 117.1105 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Wisconsin § 117.1105 Wisconsin River. The draws of each drawbridge across the Wisconsin River shall open on signal if at least 48 hours notice is given. ...

33 CFR 117.1105 - Wisconsin River.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Wisconsin River. 117.1105 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Wisconsin § 117.1105 Wisconsin River. The draws of each drawbridge across the Wisconsin River shall open on signal if at least 48 hours notice is given. ...

33 CFR 117.1105 - Wisconsin River.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Wisconsin River. 117.1105 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Wisconsin § 117.1105 Wisconsin River. The draws of each drawbridge across the Wisconsin River shall open on signal if at least 48 hours notice is given. ...

36 CFR 261.75 - Regulations applicable to Region 5, California Region, as defined in § 200.2.

Code of Federal Regulations, 2013 CFR

2013-07-01

...: (1) Middle Fork of the Feather River means the river and land area in or adjacent to Plumas National... equipment in the wild river zone of the Middle Fork of the Feather River, except on the Stag Point Trail or...

36 CFR 261.75 - Regulations applicable to Region 5, California Region, as defined in § 200.2.

Code of Federal Regulations, 2010 CFR

2010-07-01

...: (1) Middle Fork of the Feather River means the river and land area in or adjacent to Plumas National... equipment in the wild river zone of the Middle Fork of the Feather River, except on the Stag Point Trail or...

36 CFR 261.75 - Regulations applicable to Region 5, California Region, as defined in § 200.2.

Code of Federal Regulations, 2012 CFR

2012-07-01

...: (1) Middle Fork of the Feather River means the river and land area in or adjacent to Plumas National... equipment in the wild river zone of the Middle Fork of the Feather River, except on the Stag Point Trail or...

36 CFR 261.75 - Regulations applicable to Region 5, California Region, as defined in § 200.2.

Code of Federal Regulations, 2011 CFR

2011-07-01

...: (1) Middle Fork of the Feather River means the river and land area in or adjacent to Plumas National... equipment in the wild river zone of the Middle Fork of the Feather River, except on the Stag Point Trail or...

36 CFR 261.75 - Regulations applicable to Region 5, California Region, as defined in § 200.2.

Code of Federal Regulations, 2014 CFR

2014-07-01

...: (1) Middle Fork of the Feather River means the river and land area in or adjacent to Plumas National... equipment in the wild river zone of the Middle Fork of the Feather River, except on the Stag Point Trail or...

33 CFR 110.206 - Detroit River, Michigan.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Detroit River, Michigan. 110.206... ANCHORAGE REGULATIONS Anchorage Grounds § 110.206 Detroit River, Michigan. (a) The Anchorage grounds. Belle Isle Anchorage. The area is in the Detroit River immediately downstream from Belle Isle on the U.S...

33 CFR 117.337 - Trout River.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Trout River. 117.337 Section 117... OPERATION REGULATIONS Specific Requirements Florida § 117.337 Trout River. The draw of the CSX Railroad Bridge across the Trout River, mile 0.9 at Jacksonville, operates as follows: (a) The bridge is not...

33 CFR 117.337 - Trout River.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Trout River. 117.337 Section 117... OPERATION REGULATIONS Specific Requirements Florida § 117.337 Trout River. The draw of the CSX Railroad Bridge across the Trout River, mile 0.9 at Jacksonville, operates as follows: (a) The bridge is not...

33 CFR 117.300 - Manatee River.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Manatee River. 117.300 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Florida § 117.300 Manatee River. The draw of the CSX Railroad Bridge across the Manatee River, mile 4.5 Bradenton, operates as follows: (a) The bridge is not...

33 CFR 117.300 - Manatee River.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Manatee River. 117.300 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Florida § 117.300 Manatee River. The draw of the CSX Railroad Bridge across the Manatee River, mile 4.5 Bradenton, operates as follows: (a) The bridge is not...

33 CFR 117.300 - Manatee River.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Manatee River. 117.300 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Florida § 117.300 Manatee River. The draw of the CSX Railroad Bridge across the Manatee River, mile 4.5 Bradenton, operates as follows: (a) The bridge is not...

33 CFR 117.300 - Manatee River.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Manatee River. 117.300 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Florida § 117.300 Manatee River. The draw of the CSX Railroad Bridge across the Manatee River, mile 4.5 Bradenton, operates as follows: (a) The bridge is not...

33 CFR 117.300 - Manatee River.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Manatee River. 117.300 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Florida § 117.300 Manatee River. The draw of the CSX Railroad Bridge across the Manatee River, mile 4.5 Bradenton, operates as follows: (a) The bridge is not...

75 FR 78929 - Fraser River Sockeye Salmon Fisheries; Inseason Orders

Federal Register 2010, 2011, 2012, 2013, 2014

2010-12-17

...-XZ20 Fraser River Sockeye Salmon Fisheries; Inseason Orders AGENCY: National Marine Fisheries Service...; inseason orders; request for comments. SUMMARY: NMFS publishes Fraser River salmon inseason orders to regulate salmon fisheries in U.S. waters. The orders were issued by the Fraser River Panel (Panel) of the...

Decision support system for optimally managing water resources to meet multiple objectives in the Savannah River Basin

USGS Publications Warehouse

Roehl, Edwin A.; Conrads, Paul

2015-01-01

Managers of large river basins face conflicting demands for water resources such as wildlife habitat, water supply, wastewater assimilative capacity, flood control, hydroelectricity, and recreation. The Savannah River Basin, for example, has experienced three major droughts since 2000 that resulted in record low water levels in its reservoirs, impacting dependent economies for years. The Savannah River estuary contains two municipal water intakes and the ecologically sensitive freshwater tidal marshes of the Savannah National Wildlife Refuge. The Port of Savannah is the fourth busiest in the United States, and modifications to the harbor to expand ship traffic since the 1970s have caused saltwater to migrate upstream, reducing the freshwater marsh’s acreage more than 50 percent. A planned deepening of the harbor includes flow-alteration features to minimize further migration of salinity, whose effectiveness will only be known after all construction is completed.One of the challenges of large basin management is the optimization of water use through ongoing regional economic development, droughts, and climate change. This paper describes a model of the Savannah River Basin designed to continuously optimize regulated flow to meet prioritized objectives set by resource managers and stakeholders. The model was developed from historical data using machine learning, making it more accurate and adaptable to changing conditions than traditional models. The model is coupled to an optimization routine that computes the daily flow needed to most efficiently meet the water-resource management objectives. The model and optimization routine are packaged in a decision support system that makes it easy for managers and stakeholders to use. Simulation results show that flow can be regulated to substantially reduce salinity intrusions in the Savannah National Wildlife Refuge, while conserving more water in the reservoirs. A method for using the model to assess the effectiveness of the flow-alteration features after the deepening also is demonstrated.

76 FR 31838 - Drawbridge Operation Regulation; Nanticoke River, Seaford, DE

Federal Register 2010, 2011, 2012, 2013, 2014

2011-06-02

... Operation Regulation; Nanticoke River, Seaford, DE AGENCY: Coast Guard, DHS. ACTION: Notice of temporary... 39.6, at Seaford, DE. The deviation is necessary to accommodate the cleaning and painting of the..., at Seaford, DE. The requested deviation is to accommodate painting and cleaning of the bridge. The...

76 FR 47440 - Drawbridge Operation Regulations; Passaic River, Jersey City, NJ

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-05

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [Docket No. USCG-2011-0598] Drawbridge Operation Regulations; Passaic River, Jersey City, NJ AGENCY: Coast Guard, DHS. ACTION: Notice of temporary..., mile 1.8, at Jersey City, New Jersey. The deviation is necessary to facilitate bridge painting...

78 FR 66266 - Drawbridge Operation Regulations; Hackensack River, Jersey City, NJ

Federal Register 2010, 2011, 2012, 2013, 2014

2013-11-05

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 117 [USCG-2013-0880] Drawbridge Operation Regulations; Hackensack River, Jersey City, NJ AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation..., mile 3.0, at Jersey City, New Jersey. Under this temporary deviation, the bridge may remain in the...

78 FR 42452 - Drawbridge Operation Regulation; Sacramento River, Sacramento, CA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-07-16

... Operation Regulation; Sacramento River, Sacramento, CA AGENCY: Coast Guard, DHS. ACTION: Notice of deviation... Sacramento, CA. The deviation is necessary to allow the bridge owner to make bridge repairs. This deviation... Sacramento, CA. The drawbridge navigation span provides 109 feet vertical clearance above Mean High Water in...

78 FR 1145 - Regulated Navigation Area; Housatonic River, Bridge Replacement Operations; Stratford, CT

Federal Register 2010, 2011, 2012, 2013, 2014

2013-01-08

... 1625-AA11 Regulated Navigation Area; Housatonic River, Bridge Replacement Operations; Stratford, CT... surrounding the Interstate 95 (I-95) Bridge, between Stratford and Milford, CT. This RNA allows the Coast... bridge replacement operations, both planned and unforeseen, that could pose an imminent hazard to persons...

Human impacts on river ice regime in the Carpathian Basin

NASA Astrophysics Data System (ADS)

Takács, Katalin; Nagy, Balázs; Kern, Zoltán

2014-05-01

River ice is a very important component of the cryosphere, and is especially sensitive to climatic variability. Historical records of appearance or disappearance and timing of ice phenomena are useful indicators for past climatic variations (Williams, 1970). Long-term observations of river ice freeze-up and break-up dates are available for many rivers in the temperate or cold region to detect and analyze the effects of climate change on river ice regime. The ice regime of natural rivers is influenced by climatic, hydrological and morphological factors. Regular ice phenomena observation mostly dates back to the 19th century. During this long-term observation period, the human interventions affecting the hydrological and morphological factors have become more and more intensive (Beltaos and Prowse, 2009). The anthropogenic effects, such as river regulation, hydropower use or water pollution causes different changes in river ice regime (Ashton, 1986). To decrease the occurrence of floods and control the water discharge, nowadays most of the rivers are regulated. River regulation changes the morphological parameters of the river bed: the aim is to create solid and equable bed size and stream gradient to prevent river ice congestion. For the satisfaction of increasing water demands hydropower is also used. River damming results a condition like a lake upstream to the barrage; the flow velocity and the turbulence are low, so this might be favourable for river ice appearance and freeze-up (Starosolsky, 1990). Water pollution affects ice regime in two ways; certain water contaminants change the physical characteristics of the water, e.g. lessens the freezing point of the water. Moreover the thermal stress effect of industrial cooling water and communal wastewater is also important; in winter these water sources are usually warmer, than the water body of the river. These interventions result different changes in the characteristic features of river ice regime. Selected examples from the Carpathian Basin represent some of the most common human impacts (engineering regulation, hydropower usage, water pollution), disturbing natural river ice regimes of mid-latitude rivers with densely populated or dynamically growing urban areas along their courses. In addition simple tests are also introduced to detect not only the climatic, but also the effect of anthropogenic impacts on river ice regime. As a result of river regulation on River Danube at Budapest a vanishing trend in river ice phenomena could be detected in the Danube records. The average ice-affected season shortened from 40 to 27 days, the average ice-covered season reduced greatly, from 27 to 7 days. In historical times the ice jams on the River Danube caused many times ice floods. The relative frequency of the break-up jam also decreased; moreover no ice flood occurred over the past 50 years. The changes due to hydropower usage are different upstream and downstream to the damming along the river. On Raba River upstream of the Nick dam at Ragyogóhíd, the ice-affected and ice-covered seasons were lengthened by 4 and 9 days, in contrast, downstream of the dam, the length of the ice-covered season was shortened by 7 days, and the number of ice-affected days decreased by 8 days at Árpás. During the observation period at Budapest on Danube River, the temperature requirements for river ice phenomena occurrence changed. Nowadays, much lower temperatures are needed to create the same ice phenomena compared to the start of the observations. For ice appearance, the mean winter air temperature requirements decreased from +2.39 °C to +1.71 °C. This investigation focused on anthropogenic effects on river ice regime, eliminating the impact of climatic conditions. Different forms of anthropogenic effects cause in most cases, a shorter length of ice-affected seasons and decreasing frequency of ice phenomena occurrence. Rising winter temperatures result the same changes in river ice regime. Climate change and river ice regime research should also take into account these anthropogenic impacts. Reference: Ashton, W.D. 1986. River and lake ice engineering. Water Resources Publication, USA 485 p. Starosolszky, Ö., 1990. Effect of river barrages on ice regime. Journal of Hydraulic Research 28/6, 711-718. Williams, G.P., 1970. A note on the break-up of lakes and rivers as indicators of climate change. Atmosphere 8 (1), 23-24.

33 CFR 334.480 - Archers Creek, Ribbon Creek, and Broad River; U.S. Marine Corps Recruit Depot, Parris Island...

Code of Federal Regulations, 2013 CFR

2013-07-01

... Broad River; U.S. Marine Corps Recruit Depot, Parris Island, South Carolina; danger zones. 334.480... DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.480 Archers Creek, Ribbon Creek, and Broad River... danger zone on Archers Creek (between the Broad River and Beaufort River), Ribbon Creek, and the Broad...

33 CFR 334.480 - Archers Creek, Ribbon Creek, and Broad River; U.S. Marine Corps Recruit Depot, Parris Island...

Code of Federal Regulations, 2012 CFR

2012-07-01

... Broad River; U.S. Marine Corps Recruit Depot, Parris Island, South Carolina; danger zones. 334.480... DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.480 Archers Creek, Ribbon Creek, and Broad River... danger zone on Archers Creek (between the Broad River and Beaufort River), Ribbon Creek, and the Broad...

33 CFR 334.480 - Archers Creek, Ribbon Creek, and Broad River; U.S. Marine Corps Recruit Depot, Parris Island...

Code of Federal Regulations, 2014 CFR

2014-07-01

... Broad River; U.S. Marine Corps Recruit Depot, Parris Island, South Carolina; danger zones. 334.480... DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.480 Archers Creek, Ribbon Creek, and Broad River... danger zone on Archers Creek (between the Broad River and Beaufort River), Ribbon Creek, and the Broad...

Hydro-meteorological risk reduction and climate change adaptation in the Sava River Basin

NASA Astrophysics Data System (ADS)

Brilly, Mitja; Šraj, Mojca; Kryžanowski, Andrej

2017-04-01

The Sava River Basin covered the teritory of several countries. There were, in past thirty years, several flood hazard events with almost hundred years return period. Parts of the basin suffer by severe droughts also. In the presentation we covered questions of: • Flood hazard in complex hydrology structure • Landslide and flush flood in mountainous regions • Floods on karst polje • Flood risk management in the complex international and hydrological condition. • Impact of man made structures: hydropower storages, inundation ponds, river regulation, alternate streams, levees system, pumping stations, Natura 2000 areas etc. • How to manage droughts in the international river basin The basin is well covered by information and managed by international the SRB Commission (http://savacommission.org/) that could help. We develop study for climate change impact on floods on entire river basin financing by UNECE. There is also study provide climate change impact on the water management provide by World Bank and on which we take part. Recently is out call by world bank for study »Flood risk management plan for the SRB«.

Moderate effect of damming the Romaine River (Quebec, Canada) on coastal plankton dynamics

NASA Astrophysics Data System (ADS)

Senneville, Simon; Schloss, Irene R.; St-Onge Drouin, Simon; Bélanger, Simon; Winkler, Gesche; Dumont, Dany; Johnston, Patricia; St-Onge, Isabelle

2018-04-01

Rivers' damming disrupts the seasonal cycle of freshwater and nutrient inputs into the marine system, which can lead to changes in coastal plankton dynamics. Here we use a 3-D 5-km resolution coupled biophysical model and downscale it to a 400-m resolution to simulate the effect of damming the Romaine River in Québec, Canada, which discharges on average 327 m3 s-1 of freshwater into the northern Gulf of St. Lawrence. Model results are compared with environmental data obtained from 2 buoys and in situ sampling near the Romaine River mouth during the 2013 spring-summer period. Noteworthy improvements are made to the light attenuation parametrization and the trophic links of the biogeochemical model. The modelled variables reproduced most of the observed levels of variability. Comparisons between natural and regulated discharge simulation show differences in primary production and in the dominance of plankton groups in the Romaine River plume. The maximum increase in primary production when averaged over the inner part of Mingan Archipelago is 41%, but 7.1% when the primary production anomaly is averaged from March to September.

Assessing Ecological Flow Needs and Risks for Springs and Baseflow Streams With Growth and Climate Change

NASA Astrophysics Data System (ADS)

Springer, A. E.; Stevens, L. E.

2008-12-01

Ecological flow needs assessments are beginning to become an important part of regulated river management, but are more challenging for unregulated rivers. Water needs for ecosystems are greater than just consumptive use by riparian and aquatic vegetation and include the magnitude, frequency, duration and timing of flows and the depth and annual fluctuations of groundwater levels of baseflow supported streams. An ecological flow needs assessment was adapted and applied to an unregulated, baseflow dependent river in the arid to semi-arid Southwestern U.S. A separate process was developed to determine groundwater sources potentially at risk from climate, land management, or groundwater use changes in a large regional groundwater basin in the same semi-arid region. In 2007 and 2008, workshops with ecological, cultural, and physical experts from agencies, universities, tribes, and other organizations were convened. Flow-ecology response functions were developed with either conceptual or actual information for a baseflow dependent river, and scoring systems were developed to assign values to categories of risks to groundwater sources in a large groundwater basin. A reduction of baseflow to the river was predicted to lead to a decline in cottonwood and willow tree abundance, decreases in riparian forest diversity, and increases in non-native tree species, such as tamarisk. These types of forest vegetation changes would likely cause reductions or loss of some bird species. Loss of riffle habitat through declines in groundwater discharge and the associated river levels would likely lead to declines in native fish and amphibian species. A research agenda was developed to develop techniques to monitor, assess and hopefully better manage the aquifers supporting the baseflow dependent river to prevent potential threshold responses of the ecosystems. The scoring system for categories of risk was applied to four systems (aquifers, springs, standing water bodies, and streams) in the groundwater basin. The process was developed to allow water managers to assess and prioritize potential impacts to the biological, historical, or cultural aspects of the four types of systems from groundwater abstraction. These approaches can be adapted to other baseflow dependent, unregulated rivers or to assess risks to natural features associated with water sources in other regions.

Quantifying hyporheic exchange dynamics in a highly regulated large river reach

NASA Astrophysics Data System (ADS)

Zhou, T.; Bao, J.; Huang, M.; Hou, Z.; Arntzen, E.; Mackley, R.; Harding, S.; Crump, A.; Xu, Y.; Song, X.; Chen, X.; Stegen, J.; Hammond, G. E.; Thorne, P. D.; Zachara, J. M.

2016-12-01

Hyporheic exchange is an important mechanism taking place in riverbanks and riverbed sediments, where the river water and shallow groundwater mix and interact with each other. The direction and magnitude of hyporheic flux that penetrates the river bed and residence time of river water in the hyporheic zone are critical for biogeochemical processes such as carbon and nitrogen cycling, and biodegradation of organic contaminants. Hyporheic flux can be quantified using many direct and indirect measurements as well as analytical and numerical modeling tools. However, in a relatively large river, these methods can be limited by the accessibility, spatial constraints, complexity of geomorphologic features and subsurface properties, and computational power. In rivers regulated by hydroelectric dams, quantifying hyporheic fluxes becomes more challenging due to frequent hydropeaking events created by dam operations. In this study, we developed and validated methods that combined field measurements and numerical modeling for estimating hyporheic fluxes across the river bed in a 7-km long reach of the highly regulated Columbia River. The reach has a minimum width of about 800 meters and variations in river stage within a day could be up to two meters due to the upstream dam operations. In shallow water along the shoreline, vertical thermal profiles measured by self-recording thermistors were combined with time series of hydraulic gradient derived from river stage and water level at in-land wells to estimate the hyporheic flux rate. For the deep section, a high resolution computational fluid dynamics (CFD) modeling framework was developed to characterize the spatial distribution of flux rates at the river bed and the residence time of hyporheic flow at different river flow conditions. Our modeling results show that the rates of hyporheic exchange and residence time are controlled by (1) hydrostatic pressure induced by river stage fluctuations, and (2) hydrodynamic drivers associated with flow velocity variations, which also to certain extent dependent on flow conditions.

Channel adjustments to historical disturbances along the lower Brazos and Sabine Rivers, south-central USA

NASA Astrophysics Data System (ADS)

Heitmuller, Franklin T.

2014-01-01

Historical channel adjustments are documented and discussed in context with anthropogenic disturbances along two meandering, coastal plain rivers - the lower Brazos and Sabine Rivers in the south-central United States. Hard-copy streamflow-measurement notes of the U.S. Geological Survey were utilized to render historical cross sections (1925-2007) at nine gauging stations, which were complemented with repeat photographs and flood-frequency analysis to assess trajectories of channel change and interpret causative mechanisms. Downstream- and upstream-propagating disturbances caused episodes of channel-bed incision and aggradation at different locations for distinct time periods along both rivers. Incision associated with upstream dams is detected, but channels are compensated downstream with sediment inputs from lateral channel migration and tributaries. In one case, temporary aggradation along the Brazos River at Waco was likely caused by a combination of dam construction and regional soil erosion. Channel-bed incision on the lowermost Brazos River is unrelated to dams, but is associated with instream aggregate extraction, possibly in conjunction with downstream channelization. On the Sabine River, extensive aggradation during the 1930s might be associated with logging activities (1880s-1930s), but whether the cause is pervasive regional-scale hillslope erosion or local-scale mill-site activities is indeterminate. Following passage of this sediment, the river generally recovered to pre-disturbance conditions and has exhibited stability despite a mainstem reservoir. Translation of this sediment slug is attenuated by a transition to a flood-prone, distributary-dominated system downstream of the Holocene-Pleistocene terrace onlap position. Additional findings include cross-channel hingepoints separating thalweg incision from simultaneous point-bar or bank accretion at meander bends, which indicates channel adjustment occurs along non-cohesive beds in preference to cohesive or artificially reinforced banks. Also, flood reduction has resulted in bankfull stages that are higher than levels associated with the post-regulation 2-year return period. Finally, vegetation encroachment along banks since the 1970s coupled with reduced flooding along the lower Brazos River has promoted bank accretion deposits that, when fully developed, serve as morphologic indicators of the post-regulation 1- to 2-year return period stage.

Riverine ecosystem services and the thermoelectric sector: strategic issues facing the Northeastern United States

NASA Astrophysics Data System (ADS)

Miara, A.; Vorosmarty, C. J.; Stewart, R.; Wollheim, W. M.; Rosenzweig, B.

2013-12-01

Major strategic issues facing the global thermoelectric sector include environmental regulation, climate change and increasing electricity demand. We have addressed such issues by modeling thermoelectric generation in the Northeastern United States that is reliant on cooling under five sensitivity tests to evaluate losses/gains in power production, thermal pollution and suitable aquatic habitat, comparing the contemporary baseline (2000-2010) with potential future states. Integral to the analysis, we developed a methodology to quantify river water availability for cooling, which we define as an ecosystem service. Projected climate conditions reduce river water available for efficient power plant operations and the river's capacity to absorb waste heat, causing a loss of regional thermoelectric generation (RTG) (2.5%) in some summers that, compared to the contemporary baseline, is equal to the summertime electricity consumption of 1.3 million Northeastern US homes. Vulnerabilities to warm temperatures and thermal pollution can be alleviated through the use of more efficient natural gas (NG) power plants that have a reduced reliance on cooling water. Conversion of once-through (OT) to cooling tower (CT) systems and the Clean Water Act (CWA) temperature limit regulation, both of which reduce efficiencies at the single plant level, show potential to yield beneficial increases in RTG. This is achieved by obviating the need for large volumes of river water, thereby reducing plant-to-plant interferences through lowering the impact of upstream thermal pollution and preserving a minimum standard of cooling water. The results and methodology framework presented here, which can be extrapolated to other regional assessments with contrasting climates and thermoelectric profiles, can identify opportunities and support decision-making to achieve more efficient energy systems and riverine ecosystem protection.

Interspecific Relationships in Benthic Assemblages of a Large Lowland River : Co-existence or Competition as a Result of Habitat Characteristics

NASA Astrophysics Data System (ADS)

Akopian, M.; Usseglio-Polatera, P.

2005-05-01

Macrobenthic assemblages of the lower, regulated and canalized Marne River (France) are dominated by several "exotic", recently introduced species. Arrival, installation and spread of such alien species were certainly promoted by (1) the close connection between French and other European river systems (Rhine, Danube), (2) the modification of natural river flow and benthic habitats. Both habitat characteristics (e.g. granulometric composition, organic content) and corresponding benthic assemblage structure were analysed to identify the substrate affinity of major taxa in the lower Marne River. The main aim of the study was to evaluate the possible biotic interactions (i.e. competition for food and/or space) among dominant taxa as function of habitat features and to predict the future development of newly established species, already known as potential invaders: Corbicula fluminea (Bivalvia), Hypania invalida (Polychaeta), Chelicorophium curvispinum (Amphipoda), etc. Most of the newly established species, coming from the same biogeographical area ("invasional meltdown" hypothesis?), are eurytopic, with high fecundity and large food spectrum. First results demonstrated the co-existence of such species in the Marne River. But the future ecological importance of these organisms in benthic assemblages of the river depends on their present population size, population dynamics, and ability to colonize bottom substrates.

Hydrological alteration along the Missouri River Basin: A time series approach

USGS Publications Warehouse

Pegg, M.A.; Pierce, C.L.; Roy, A.

2003-01-01

Human alteration of large rivers is common-place, often resulting in significant changes in flow characteristics. We used a time series approach to examine daily mean flow data from locations throughout the main-stem Missouri River. Data from a pre-alteration period (1925-1948) were compared with a post-alteration period (1967-1996), with separate analyses conducted using either data from the entire year or restricted to the spring fish spawning period (1 April-30 June). Daily mean flows were significantly higher during the post-alteration period at all locations. Flow variability was markedly reduced during the post-alteration period as a probable result of flow regulation and climatological shifts. Daily mean flow during the spring fish spawning period was significantly lower during the post-alteration period at the most highly altered locations in the middle portion of the river, but unchanged at the least altered locations in the upper and lower portions of the river. Our data also corroborate other analyses, using alternate statistical approaches, that suggest similar changes to the Missouri River system. Our results suggest human alterations on the Missouri River, particularly in the middle portion most strongly affected by impoundments and channelization, have resulted in changes to the natural flow regime.

77 FR 40265 - Drawbridge Operation Regulation; Tennessee River, Decatur, AL

Federal Register 2010, 2011, 2012, 2013, 2014

2012-07-09

... schedule that governs the Southern Railroad Drawbridge across the Tennessee River, mile 304.4, at Decatur..., across the Tennessee River, mile 304.4, at Decatur, AL. The vertical clearance of the bridge in the...

Variability and regulation of denitrification in an Upper Mississippi River backwater

USGS Publications Warehouse

Strauss, E.A.; Richardson, W.B.; Cavanaugh, J.C.; Bartsch, L.A.; Kreiling, Rebecca M.; Standorf, A.J.

2006-01-01

Sediments in the backwaters of the Upper Mississippi River (UMR) are highly organic and provide an optimal environment for N removal. We monitored an 8.6-ha UMR backwater site near La Crosse, Wisconsin, for nearly 3 y to assess temporal variability, seasonal trends, and the factors regulating denitrification. We measured rates of unamended denitrification (DEN) and denitrification enzyme activity (DEA) rates at ambient temperature and DEA at 30 degrees C (DEA30). Seasonal mean (+/- 1 SE) DEN rates ranged from 0.041 +/- 0.015 to 0.47 +/- 0.23 mu g N cm(-2) h(-1)and were highest in winter and lowest in autumn. Seasonal rates of DEA exhibited a different pattern with the highest rates in summer (25.6 +/- 3.4 mu g N cm(-2) h(-1)) and the lowest rates in winter (10.6 +/- 2.1 mu g N cm(-2) h(-1)). The overall mean DEA30 rate was 31.0 +/- 1.9 mu g N cm(-2) h(-1) but showed no significant seasonal pattern. Short-term (weekly) and seasonal variability exhibited by rates of DEN and DEA were best explained by water-column NO3- concentration and temperature, respectively. No environmental variables explained a significant amount of variability in DEA30. Our results suggest that nutrient (i.e., NO3-) availability and temperature are both regulators of denitrification, with NO3- concentration being the most important limiting factor in this system. The high DEN rates during winter were in response to elevated NO3- concentrations resulting from a chain reaction beginning with algal blooms creating oxic conditions that stimulated nitrification. Increasing hydrological connectivity in large rivers as a river management tool to reduce N flux to downstream areas may be beneficial.

The effect of flow reduction on microphytobenthos development in an alpine river stretch using novel fluorescence techniques

NASA Astrophysics Data System (ADS)

Ganglbauer, A.; Bondar-Kunze, E.; Hein, T.; Zeiringer, B.

2009-04-01

Many European river systems are affected by flow alterations leading to significant differences of the pristine discharge regime at different temporal scales. Flow regulation measures and water abstraction are changing the extent and frequency of water level changes. In concert with river bed regulation this could affect the hydromorphological situation of river systems and key ecosystem functions. Microphytobenthos is a major component in the physical, chemical and biochemical processes, which occur in river systems and the associated riparian zones. They are significant primary producers in rivers, because of their high turnover rate, rapid colonization along the aquatic-terrestrial boundary, transform nutrients and support via their biomass the food webs in the river and adjacent ecosystems. The developed structure and composition of microphytobenthos is controlled by the hydromorphological conditions and thus, indicates environmental changes. The guiding question for the presented research was to what extent changes in the variability of flow affect microphytobenthos development in a river stretch and to what extent the structure and composition of microphytobenthos changed at the micro scale. To investigate these effects under natural conditions we compared a residual flow section impacted by a hydropower plant with one unaffected section of the River Ybbs, a tributary to the Danube River. The river stretch investigated was a 33 km long stretch between the villages Göstling and Opponitz in Lower Austria. The River Ybbs is draining a catchment of 1,300 km2 and has a mean discharge of 20 m3 s-1.The main benthic algal group are diatoms, which are typical for low order rivers in the Alpine area, characterized by low temperatures throughout the year. We expected that flow velocity explain the extent of microphytobenthos development at the river stretch scale and especially low flow conditions affect the structure and composition of algal biomass at the micro scale. The measurements included field surveys and two experimental settings. During May 2008 we conducted an in-situ experiment with artificial substrata to investigate the effect of flow velocity changes. We exposed glass slides in baskets along two transects in the River Ybbs at two sampling sites and eight different positions. After a period of about four weeks with weekly recurrent measurements including flow velocity, water depth, chlorophyll a content and electron transport rate (ETR) we started our experiment. Glass slides were taken from each position and were exposed in a flow reduced impounded area in the river Ybbs near Göstling. There low flow velocity was used to test the effect on microphytobenthos development. The next ten days daily measurements of flow velocity, water depth, chlorophyll-a content and electron transport rate (ETR) with the pulse amplitude modulated fluorescence method and microscopic analysis were undertaken. Based on these daily measurements under almost stable environmental conditions we could ascertain a shift in the benthic algae community. To assess the distribution along a river stretch we measured 70 sampling points at each sampling side. To characterize the biomass and activity of the microphytobenthos we used Pulse Amplitude Modulated Fluorescence (PAM-Fluorescence). Using this technique allow to measure the biomass (Chlorophyll a) and the ETR (electron transport rate) simultaneously without destroying the structure. With this technique it is possible to The PAM technique measure directly the fluorescence of chlorophyll a in the photosystem two. The quantum yield you get is the probability that a photon can be used photochemically. The quantum yield offers the possibility to illustrate the fitness of algae. Based on these measurements short term responses can be measured and combined with the results of field surveys. These analytical results were used for a habitat modelling approach to describe the microphytobenthos development at 2 scales. First results of the research will be presented.

Development of an inflow controlled environmental flow regime for a Norwegian river

NASA Astrophysics Data System (ADS)

Alfredsen, Knut; Harby, Atle; Linnansaari, Tommi; Ugedal, Ola

2010-05-01

For most regulated rivers in Norway the common environmental flow regime is static and shows very little variation over the year. Recent research indicate that flow regimes that follow the natural inflow variation can meet the ecological and social demands for water in a better way. The implementation of a variable environmental flow regime provides many challenges both related to defining flow for various species and user groups in the river, but also due to practical implementation, legislation and control. A inflow controlled flow regime is developed for a Norwegian river regulated for hydro power as a pilot study. The regime should meet ecological demands from Atlantic salmon and brown trout, recreational use of water and visual impression of the river. This should be achieved preferably without altering the energy production in the hydro power system. The flow regime is developed for wet, dry and normal discharge conditions based on unregulated inflow to the catchment. The development of the seasonal flow requirements for various targets identified is done using a modification of the Building Block Method. Several options are tested regarding the integration of the flow regime into the operational strategy of the hydropower plant, both using real time prognosis of inflow and combinations with historical data. An important topic in selecting the release strategy is how it meets current Norwegian legislation and how well future documentation and environmental control can be carried out. An evaluation protocol is also proposed for the flow regime to test if the ecological targets are met.

Macroinvertebrate community responses to gravel augmentation in a high-gradient, Southeastern regulated river

DOE Office of Scientific and Technical Information (OSTI.GOV)

McManamay, Ryan A; Orth, Dr. Donald J; Dolloff, Dr. Charles A

2013-01-01

Sediment transport, one of the key processes of river systems, is altered or stopped by dams, leaving lower river reaches barren of sand and gravel, both of which are essential habitat for fish and macroinvertebrates. One way to compensate for losses in sediment is to supplement gravel to river reaches below impoundments. Because gravel addition has become a widespread practice, it is essential to evaluate the biotic response to restoration projects in order to improve the efficacy of future applications. The purpose of our study was to evaluate the response of the macroinvertebrate community to gravel addition in a high-gradient,more » regulated river in western North Carolina. We collected benthic macroinvertebrate samples from gravel-enhanced areas and unenhanced areas for 1 season before gravel addition, and for 4 seasons afterwards. Repeated measures multivariate analysis of variance indicated that the responses of macroinvertebrates to gravel addition were generally specific to individual taxa or particular functional feeding groups and did not lead to consistent patterns in overall family richness, diversity, density, or evenness. Non-metric multi-dimensional scaling showed that shifts in macroinvertebrate community composition were temporary and dependent upon site conditions and season. Correlations between macroinvertebrate response variables and substrate microhabitat variables existed with or without the inclusion of data from enhanced areas, which suggests that substrate-biotic relationships were present before gravel addition. A review of the current literature suggests that the responses of benthic macroinvertebrates to substrate restoration are inconsistent and dependent upon site conditions and the degree habitat improvement of pre-restoration site conditions.« less

Quantifying hyporheic exchange dynamics in a highly regulated large river reach.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Hammond, Glenn Edward; Zhou, T; Huang, M

Hyporheic exchange is an important mechanism taking place in riverbanks and riverbed sediments, where river water and shallow groundwater mix and interact with each other. The direction, magnitude, and residence time of the hyporheic flux that penetrates the river bed are critical for biogeochemical processes such as carbon and nitrogen cycling, and biodegradation of organic contaminants. Many approaches including field measurements and numerical methods have been developed to quantify the hyporheic exchanges in relatively small rivers. However, the spatial and temporal distributions of hyporheic exchanges in a large, regulated river reach remain less explored due to the large spatial domains,more » complexity of geomorphologic features and subsurface properties, and the great pressure gradient variations at the riverbed created by dam operations.« less

Management to Insulate Ecosystem Services from the Effects of Catchment Development

NASA Astrophysics Data System (ADS)

Gell, Peter

2018-02-01

Natural ecosystems provide amenity to human populations in the form of ecosystem services. These services are grouped into four broad categories: provisioning - food and water production; regulating - control of climate and disease; supporting - crop pollination; and cultural - spiritual and recreational benefits. Aquatic systems provide considerable service through the provision of potable water, fisheries and aquaculture production, nutrient mitigation and the psychological benefits that accrue from the aesthetic amenity provided from lakes, rivers and other wetlands. Further, littoral and riparian ecosystems, and aquifers, protect human communities from sea level encroachment, and tidal and river flooding. Catchment and water development provides critical resources for human consumption. Where these provisioning services are prioritized over others, the level and quality of production may be impacted. Further, the benefits from these provisioning services comes with the opportunity cost of diminishing regulating, supporting and cultural services. This imbalance flags concerns for humanity as it exceeds recognised safe operating spaces. These concepts are explored by reference to long term records of change in some of the world's largest river catchments and lessons are drawn that may enable other communities to consider the balance of ecosystems services in natural resource management.

Influence of Flow Regulation on Summer Water Temperature: Sauce Grande River, Argentina

NASA Astrophysics Data System (ADS)

Casado, A.; Hannah, D. M.; Peiry, J.; Campo, A. M.

2012-12-01

This study quantifies the effects of the Paso de las Piedras Dam on the thermal behaviour of the Sauce Grande River, Argentina, during a summer season. A 30-day data set of continuous hourly data was assembled for eight stream temperature gauging sites deployed above and below the impoundment. Time series span the hottest period recorded during summer 2009 to evaluate variations in river water temperature under strong meteorological influence. The methods include: (i) analysis of the time series by inspecting the absolute differences in daily data (magnitude, timing, frequency, duration and rate of change), (ii) classification of diurnal regimes by using a novel regime 'shape' and 'magnitude' classifying method (RSMC), and (ii) quantification of the sensitivity of water temperature regimes to air temperature by computation of a novel sensitivity index (SI). Results showed that fluctuations in daily water temperatures were linked to meteorological drivers; however, spatial variability in the shape and the magnitude of the thermographs revealed the effects of the impoundment in regulating the thermal behaviour of the river downstream. An immediate cooling effect below the dam was evident. Mean daily temperatures were reduced in up to 4 °C, and described a warming trend in the downstream direction over a distance of at least 15 km (up to +2.3 °C). Diurnal cycles were reduced in amplitude and delayed in timing, and revealed a dominance of regime magnitude stability and regime shape climatic insensitivity over a distance of 8 km downstream. These findings provide new information about the water quality of the Sauce Grande River and inform management of flows to maintain the ecological integrity of the river system. Also, they motivate further analysis of potential correlates under varying hydrological and meteorological conditions. The methods presented herein have wider applicability for quantifying river thermal regimes and their sensitivity to climate and other drivers of change over a range of temporal and spatial scales.