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Publication Extents

Not all publications have extents, not all extents are completely accurate
Studies by the U.S. Geological Survey on sources, transport, and fate of agricultural chemicals
Paul D. Capel, Pixie A. Hamilton, Martha L. Erwin
2004, Fact Sheet 2004-3098
The U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program is assessing the sources, transport, and fate of chemicals applied to crops in agricultural basins across the Nation (referred to as "study units," see map). Chemicals selected for study include nutrients (nitrogen and phosphorus) and about 50 commonly used pesticides and...
Linking selenium sources to ecosystems: San Francisco Bay-Delta Model
Theresa S. Presser, Samuel N. Luoma
2004, Fact Sheet 2004-3091
Marine sedimentary rocks of the Coast Ranges contribute selenium to soil, surface water, and ground water in the western San Joaquin Valley, California. Irrigation funnels selenium into a network of subsurface drains and canals. Proposals to build a master drain (i.e., San Luis Drain) to discharge into the San Francisco...
The Alaska Volcano Observatory - Expanded monitoring of volcanoes yields results
Steven R. Brantley, Robert G. McGimsey, Christina A. Neal
2004, Fact Sheet 2004-3084
Recent explosive eruptions at some of Alaska's 52 historically active volcanoes have significantly affected air traffic over the North Pacific, as well as Alaska's oil, power, and fishing industries and local communities. Since its founding in the late 1980s, the Alaska Volcano Observatory (AVO) has installed new monitoring networks and...
Availability Of Ground-Water Data For California, Water Year 2003
Julia A. Huff
2004, Fact Sheet 2004-3061
The U.S. Geological Survey, Water Resources, in cooperation with Federal, State, and local agencies, obtains a large amount of data pertaining to the groundwater resources of California each water year (October 1?September 30). These data constitute a valuable database for developing an improved understanding of the water resources of the...
Mapping a flood before it happens
Joseph L. Jones
2004, Fact Sheet 2004-3060
What's missing from flood forecasts? Maps—The only maps generally available today are maps used for planning. They are maps of theoretical floods, not maps of flooding forecast for an approaching storm. The U.S. Geological Survey (USGS) and the National Weather Service (NWS) have developed a way to bring flood...