The chemical, physical, and biological characteristics of water, usually in respect to its suitability for a particular purpose.
Hydrologic studies in the Upper Klamath Basin, Oregon [ More info] Overview of Klamath ecological research and links to USGS Klamath studies on ground water, nutrients, sediment oxygen demand, and fish response to water quality, sucker ecology, publications, bibliographies, and data.
Hydrology of Johnson Creek Basin, a Mixed-Use Drainage Basin in the Portland, Oregon, Metropolitan Area [ More info] Study of a small stream that has had a history of persistent flooding and water-quality problems.
Hypoxia [ More info] A brief definition and explanation of hypoxia with special reference to the Gulf of Mexico hypoxic zone along the Louisiana-Texas coast as well as extensive links to USGS and other related information resources.
Hypoxia in the Gulf of Mexico and related USGS activities [ More info] Information about the causes and impact of hypoxia with links to USGS and other Federal agency information and activities related to nutrients in the Mississippi River Basin and hypoxia in the Gulf of Mexico.
Identifying sources of fecal coliform bacteria in selected streams on Virginia's Total Maximum Daily Loads (TMDL) priority list [ More info] Describes project to identify sources of fecal coliform bacteria by ribotyping to develop the use of Maximum Daily Load (TMDL) values for contaminated stream segments in Virginia.
Johnson Creek basin hydrologic monitoring [ More info] Hydrologic data and analyses of surface-water, water quality, and ground water in the Johnson Creek basin in Oregon.
Long Term Resource Monitoring Program (Upper Mississippi River area): sampling data [ More info] Downloadable data and other information about the sampling programs used in long-term monitoring of the upper Mississippi River area.
Louisiana online water resources publications [ More info] Links to electronic publications on Louisiana water resources, some in PDF format, and link to bibliographies of electronic and paper publications.
Lower Columbia River dissolved gas monitoring network [ More info] Links to real-time data for total dissolved gas, temperature, and barometric pressure in lower Columbia River in Oregon and Washington and to project reports.
Massachusetts and Rhode Island District water data [ More info] Links to streamflow, surface and ground water, water quality, flood, drought, and precipitation data in real-time and for historic time periods for Massachusetts and Rhode Island.
Alphabetical Index of Topics
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