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Publication Extents

Not all publications have extents, not all extents are completely accurate
Science data in support of environmental health studies in the U.S.-Mexico border region
Denny Buckler, Eric Strom
2004, Fact Sheet 2004-3013
The border region of the United States and Mexico encompasses a vast and diverse array of physical settings and habitats that include wetlands, deserts, rangeland, mountains, and forests, which are unique in terms of the diversity of their water, mineral, and biological resources. The region is interconnected economically, politically,...
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...