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A:
ARS Water Database - Source of precipitation and streamflow data from small agricultural watersheds [U.S. Department of Agriculture (USDA), Agriculture Research Service (ARS), Hydrology and Remote Sensing Laboratory]

Agricultural chemicals. - Overview of the Toxic Substances Hydrology Program role in investigating the occurrence and fate of agricultural chemicals with links to investigations, headlines, on-line fact sheets, new publications, bibliographies and photo gallery. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

Aquifer basics - Links to general information on water-supply by aquifers based on rock types and to principal national aquifers by name. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

Ask an Earth Scientist - Answers specific questions related to volcanoes, earthquakes and seismology, natural hazards, environment and hydrology, sediments and sedimentary rocks, igneous rocks and minerals [National Aeronautics and Space Administration (NASA)]

B:
Benchmark glaciers - Summary of the USGS benchmark glacier program to intensively monitor climate, glacier motion, glacier mass balance, glacier geometry, and stream runoff at three glacier basins, Gulkana and Wolverine in Alaska and South Cascade in Washington. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

C:
CDC Tsunamis - This page provides information about public health issues related to Tsunamis [U.S. Department of Health and Human Services (HHS), Centers for Disease Control and Prevention (CDC)]

Center for Coastal Monitoring and Assessment (CCMA) - Monitors, surveys, and assesses coastal environmental quality, habitats, and resource distribution [U.S. Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS)]

Chesapeake Bay Activities - Information on USGS studies of Chesapeake Bay, the nations largest estuary, concerned with water quality, ecosystem history and change, vital habitat and biological resources,and land use studies [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

Climate Prediction Center - Famine Early Warning System Network (FEWS-Net); Mesoamerican Famine Early Warning System (MFEWS); Asian Flood Network (AFN). [U.S. Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Weather Service (NWS)]

E:
EPA WaterSense - Resources to help save water and protect the environment [U.S. Environmental Protection Agency (EPA)]

Earth Day: Selected Resources - Science Reference Guide - Finding guide from the Library of Congress, Science Reference Section [U.S. Library of Congress (LOC)]

Earth’s Water Cycle in a Changing Climate - Webcast of a presentation at the Library of Congress by Peter Hildebrand, chief of the Hydrospheric and Biospheric Sciences Laboratory at NASA Goddard Space Flight Center. [U.S. Library of Congress (LOC), Science, Technology and Business Division]

Eastern Oregon Agricultural Research Center (EOARC) - Develop agricultural and natural resource strategies that maintain or enhance intermountain forest and shrub steppe ecosystems [U.S. Department of Agriculture (USDA), Agriculture Research Service (ARS)]

F:
FEWS NET Africa Data Portal - The FEWS NET Africa Data Portal provides access to spatial data, satellite imagery, and other data and graphic products in support of the Famine Early Warning Systems Network (FEWS NET) project. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

FS INFO - National Forest Service Library catalog--indexing forestry and natural resources literature, including many full-text links. [U.S. Department of Agriculture (USDA), Forest Service]

G:
Geosciences Research - Improves the understanding of chemical, biological, and geophysical processes in the subsurface, and how these processes affect water and contaminant transport [U.S. Department of Energy (DOE), Idaho National Laboratory (INL)]

Global Hydrology and Climate Center (GHCC) - Studies the global water cycle and its effect on the climate [National Aeronautics and Space Administration (NASA)]

Great Lakes Environmental Research Laboratory (GLERL) - Conducts integrated, interdisciplinary environmental research in support of resource management and environmental services in coastal and estuarine water, with special emphasis on the Great Lakes [U.S. Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science]

Green Roofs - Science Tracer Bullet - Finding aid from the Library of Congress [U.S. Library of Congress (LOC)]

Ground Water and Drinking Water - Links and information on safe drinking water [U.S. Environmental Protection Agency (EPA), Office of Ground Water and Drinking Water (OGWDW)]

Ground water information pages - Lead page to connect to ground-water information on the Nations ground-water resources and ground-water activities of the USGS. Includes links to ground-water data, new reports, publications, field techniques, models, programs, and issues [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS), Office of Ground Water]

H:
Hydroacoustics (OSW) - Provides information on hydroacoustic technologies such as Doppler instruments and their use within the U.S. Geological Survey and elsewhere. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

Hydrologic Information Center - Current and historical information on flooding and other hydrologic conditions [U.S. Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Weather Service (NWS)]

Hydrologic Instrumentation Facility (HIF) - Serves as a center for the collection and dissemination of information concerning hydrologic field instrumentation [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

Hydrology Technical Group - Carries out a variety of research on groundwater movement and the effects of dams [U.S. Department of Energy (DOE), Pacific Northwest National Laboratory (PNNL)]

Hydrometeorologic Design Studies Center (HDSC) - Prepares and publishes U.S. design standards and estimates for probable maximum precipitation (PMP) and precipitation frequency (PF) [U.S. Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Weather Service (NWS), Office of Hydrologic Development (OHD)]

Hydrometeorological Automated Data System (HADS) - Provides data from more than 8,800 locations at which hydrologic and/or meteorologic information is observed [U.S. Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Weather Service (NWS)]

I:
Integrated Ocean Observing System - IOOS is a coordinated network of people and technology that work together to generate and disseminate continuous data on our coastal waters, Great Lakes, and oceans. [U.S. Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA)]

M:
Managing water in the American West - Science and Technology Program. [U.S. Department of the Interior (DOI), Bureau of Reclamation]

Mapping Water Use from Space - Webcast - Webcast of a talk at the Library of Congress. Martha Anderson, PhD., talks about using images from the Landsat satellite program to monitor water use and drought on U.S. farms. It is used to measure evapotranspiration, the total amount of water used in the process of growing crops. [U.S. Library of Congress (LOC)]

N:
National Atmospheric Deposition Program/National Trends Network (NADP/NTN) - Access data from a nationwide network of precipitation monitoring sites [Multiple agencies involved]

National Hydrography Dataset (NHD) - A comprehensive set of digital spatial data about surface water features, with links to references, data, software tools, applicatons, tutorials, technical support, and data maintenance [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

National Operational Hydrologic Remote Sensing Center (NOHRSC) - Issues river and flood forecasts and provides hydrometeorological data and products to support water resources managers [U.S. Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Weather Service (NWS)]

National Research Program (NRP) for water resources - Supports hydrologic research in support of the mission of the U.S.Geological Survey. Site provides links to search for current projects and for postdoctoral opportunities [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

National Stream Quality Accounting Network (NASQAN) - Homepage description, a long-term program monitoring the concentrations and flux of sediment and chemicals in the Nation's largest rivers (Mississippi, Columbia, Colorado, Rio Grande, and Yukon) [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

National Streamflow Information Program - Home page describing the operation and maintenance of 7000 streamgages, overview of the program, system for collection of streamflow data, maintaining of historic streamflow data, and available reports [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

National Water Conditions - Historical maps and animations of maps for monthly and annual streamflow conditions by water year showing generalized contour patterns of streamflow conditions. Maps are for the United States, Canada, and Puerto Rico [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

National Water Quality Laboratory (NWQL) - A full-service laboratory that specializes in environmental analytical chemistry and has a primary role to develop new analytical methods. Links to directory, publications, and standards [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

National Water-Quality Assessment (NAWQA) Program - Primary homepage for studying water quality in river, aquifer and coastal water basins throughout the nation. Links to reports, data, models, maps and national synthesis studies [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

National Water-Quality Assessment (NAWQA) Program: reconstructed trends national synthesis study - Program compiles data to study national trends with links to sediment coring sites, video on Salt Lake City, study units identification, and publications [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS), National Water-Quality Assessment Program (NAWQA)]

Natural Disasters: A Guide to Selected Resources - Science Reference Guide - A finding guide from the Library of Congress, Science Reference Services [U.S. Library of Congress (LOC)]

North Appalachian Experimental Watershed Unit (NAEW) - Conducts research on hydrology, surface runoff, groundwater quality, and erosion in an agricultural context [U.S. Department of Agriculture (USDA), Agriculture Research Service (ARS)]

Northern Plains Agricultural Research Laboratory - The NPARL mission is to develop ecologically based strategies, technologies, and products for the sustainable management of crops and rangeland, and natural resource systems. [U.S. Department of Agriculture (USDA), Agriculture Research Service (ARS)]

Nutrients National Synthesis Project - National assessment of nutrients in the streams, rivers, and ground water of the U.S. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS), National Water-Quality Assessment Program (NAWQA)]

O:
Observing the Living Oceans from Space. Webcast - A Webcast of a presentation by Gene Feldman, NASA Goddard Space Flight Center. [U.S. Library of Congress (LOC)]

Office of Hydrologic Development (OHD) - Involved in hydrologic predictions and analyses leading to the application of new scientific and computer technologies for hydrologic forecasting and related water resources problems [U.S. Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Weather Service (NWS)]

P:
Pasture Systems and Watershed Management Research Laboratory (PSWMRL) - Conducts research leading to the development of land, water, and plant management systems of northeastern grazing and cropping enterprises while maintaining the quality of ground and surface waters [U.S. Department of Agriculture (USDA), Agriculture Research Service (ARS)]

R:
Record Group 315: Records of Interagency Committees and Councils Coordinating Water Use Programs, 1938 - 1981 - National Archives' Archival Research Catalog description for Record Group 315: Records of Interagency Committees and Councils Coordinating Water Use Programs, 1938 - 1981 [U.S. National Archives and Records Administration (NARA)]

Record Group 380: Records of the Office of Saline Water, 1955 - 1972 - National Archives' Archival Research Catalog description for Record Group 380: Records of the Office of Saline Water, 1955 - 1972 [U.S. National Archives and Records Administration (NARA)]

S:
Science in Your Watershed - Provides scientific information for characterizing, assessing, analyzing, and maintaining the status and health of watersheds. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS), Water]

South Florida Water Management District (SFWMD.gov) - Managing and protecting the waters of South Florida. [Multiple agencies involved]

Southeast Ecological Science Center - Founded in 2009, SESC studies the biology and ecology of aquatic environments in the United States and around the world. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

Southwest Watershed Research Center - Research is conducted in erosion & sedimentation, hydrology, decision support systems, remote sensing [U.S. Department of Agriculture (USDA), Agriculture Research Service (ARS)]

Standard Reference Materials (SRMs) - NIST supports accurate and compatible measurements by certifying and providing over 1300 Standard Reference Materials® with well-characterized composition or properties, or both. These materials are used to perform instrument calibrations in units as part of overall quality assurance programs, to verify the accuracy of specific measurements and to support the development of new measurement methods. [U.S. Department of Commerce (DOC), National Institute of Standards and Technology (NIST), Various laboratories]

State Water Resources Research Institute (WRRI) Program - Homepage with links to institutes, projects, and programs [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS), Water Resources Research Institute (WRRI)]

Stream Systems Technology Center - Access to information, documents, and video recordings related to fluvial geomorphology [U.S. Department of Agriculture (USDA), Forest Service]

Surf Your Watershed - A service to help you locate, use, and share environmental information [U.S. Environmental Protection Agency (EPA)]

Surface water information pages - Lead page for detailed United States surface water information with links to real-time and historic streamflow data, suspended sediment data, USGS programs and facilities, publications, techniques, and featured news releases [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS), Office of Surface Water]

Sustainability of semi-Arid Hydrology and Riparian Areas (SAHRA) - Promotes sustainable management of water resources in semi-arid regions using efforts that span the physical and behavioral sciences [U.S. National Science Foundation (NSF), Science and Technology Centers (STC)]

T:
Toxic Substances Hydrology Program - Homepage which provides scientific information on contaminated sites and on human and environmental health. Links to news, topical information, investigations, meetings, publications, and photos [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

U:
U.S. Geological Survey (USGS), Department of the Interior - Homepage, serving as portal to all USGS information with search options, USGS in the news, most frequently requested topics, and access to major categories of USGS information [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

USGS Recreation Site - Gateway to useful USGS websites for recreation in nature watching and exploring, boating, camping, climbing, fishing, hiking,biking, and hunting, with links to maps, real-time streamflow, geology, photos, and plant and animal information [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

V:
Visible Earth - A searchable directory of images, visualizations, and animations to the Earth [National Aeronautics and Space Administration (NASA)]

W:
Water - By 2025, as much as two-thirds of the world’s population could be living under water-stressed conditions where water becomes an impediment to health, peace, and socio-economic development. Statistics like this one make water one of the largest challenges of the 21st century, a foreign policy priority, and an area in which the U.S. Department of State is actively engaged. Our strategy is founded in the belief that many countries are already, or will experience water problems, including; shortages [U.S. Department of State]

Water Erosion Prediction Project - This is a process-based, distributed parameter, continuous simulation, erosion prediction model for use on personal computers running Windows. [U.S. Department of Agriculture (USDA), Agriculture Research Service (ARS), National Soil Erosion Research Lab]

Water Management - Provides information about water management publications available for sale from the U.S. Government Bookstore [U.S. Government Printing Office (GPO)]

Water Management Research Laboratory (WMRL) - Develops irrigation and drainage practices for efficiency, agricultural productivity and sustainability, and reducing environmental impacts in semi-arid and arid areas [U.S. Department of Agriculture (USDA), Agriculture Research Service (ARS)]

Water Resources Real-time data for the Nation - Access to national water resources real-time data typically recorded at 15-60 minute intervals, stored onsite, and then transmitted to USGS offices every 4 hours. Select for site information, ground water, surface water,and water quality [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

Water Resources of the United States - Primary homepage for USGS programs in water resources with links to water data, publications and products, technical resources, major programs, and water information services [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

Water Use in the United States - Links to water use reports for the United States for 1985, 1990, and 1995, comparison of use and renewable water supply by region, handbook for collecting water-use data, and other information on national water use [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

Water Watch: current water resources conditions - U.S. map of real-time streamflow compared to historical values with links to U.S. maps and data of surface water, ground water, precipitation, river conditions and floods and other information on current and past water resources conditions [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

Water science for schools - Homepage of an educational site for elementary school students with links to water subjects including water basics, water questions and answers, water use, picture gallery, glossary, NavGuide, and certificate of completion. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

William R. Wiley Environmental Molecular Sciences Laboratory (EMSL) - Research is on focused on developing a molecular-level understanding of the physical, chemical and biological processes that underlie the most critical environmental issues [U.S. Department of Energy (DOE), Pacific Northwest National Laboratory (PNNL)]