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Publication Extents

Not all publications have extents, not all extents are completely accurate
Native salamanders and introduced fish: Changing the nature of mountain lakes and ponds
Gary L. Larson, Robert L. Hoffman
2003, Fact Sheet 025-03
During the last century, many fishless mountain lakes and ponds in the Pacific Northwest were stocked with non-native fish, such as brook trout, for recreational purposes. These introduced fish replaced long-toed and northwestern salamander larvae as the top aquatic vertebrate predator by preying on salamander larvae. This predatory interaction has...
PRAIRIEMAP: A GIS database for prairie grassland management in western North America
Water Resources Division, U.S. Geological Survey
2003, Fact Sheet 057-03
The USGS Forest and Rangeland Ecosystem Science Center, Snake River Field Station (SRFS) maintains a database of spatial information, called PRAIRIEMAP, which is needed to address the management of prairie grasslands in western North America. We identify and collect spatial data for the region encompassing the historical extent of prairie...
Shuttle Radar Topography Mission (SRTM)
Water Resources Division, U.S. Geological Survey
2003, Fact Sheet 071-03
Under an agreement with the National Aeronautics and Space Administration (NASA) and the Department of Defense's National Imagery and Mapping Agency (NIMA), the U.S. Geological Survey (USGS) is now distributing elevation data from the Shuttle Radar Topography Mission (SRTM). The SRTM is a joint project between NASA and NIMA to...
Crater Lake: blue through time
Gary L. Larson, Mark Buktenica, Robert Collier
2003, Fact Sheet 018-03
Blue is the color of constancy, hence the term true blue. The unearthly blueness of Crater Lake reflects its pristine character and gives scientists a focal point for studying human impacts on aquatic environments over long periods of time. Scientists with the U.S. Geological Survey (USGS), National Park Service, and Oregon...
Investigation of the geology and hydrology of the Coconino Plateau of northern Arizona: a project of the Arizona Rural Watershed Initiative
Marilyn E. Flynn, Donald J. Bills
2002, Fact Sheet 113-02
The water resources of the Coconino Plateau in northern Arizona are under increasing demand as a result of development. The population of this arid region continues to grow, and the number of visitors to the many national and state parks and monuments in the region has increased annually. The sustainability,...
Fractured-rock aquifers, understanding an increasingly important source of water
Allen M. Shapiro
2002, Fact Sheet 112-02
Ground water is one of the Nation's most important natural resources. It provides drinking water to communities, supports industry and agriculture, and sustains streams and wetlands. A long record of contributions exists in understanding ground-water movement in sand and gravel aquifers; historically, these aquifers were easily accessible and the first...
Uncertainty in annual streamflow and change in reservoir content data from selected surface-water gaging stations on the lower Colorado River
David W. Anning
2002, Fact Sheet 108-01
The lower Colorado River is an important water resource for metropolitan populations, agriculture, and industry in California, Arizona, and Nevada. The Bureau of Reclamation (BOR) manages the river, releasing water stored in Lakes Mead, Mohave, and Havasu, and in other smaller reservoirs as needed so that it can be used...
Mount Rainier– Learning to live with volcanic risk
C. L. Driedger, K. M. Scott
2002, Fact Sheet 034-02
Mount Rainier in Washington state is an active volcano reaching more than 2.7 miles (14,410 feet) above sea level. Its majestic edifice looms over expanding suburbs in the valleys that lead to nearby Puget Sound. USGS research over the last several decades indicates that Mount Rainier has been the source...
Comparison of dissolved oxygen and aquatic biota between a State 303(d)-listed stream segment and USGS biological reference sites in the San Jacinto River Basin, Texas, 2000
J. Bruce Moring
2002, Fact Sheet 063-02
About 30 percent of the 238 water bodies on the 2000 State of Texas 303(d) list of impaired or threatened waters are included for not meeting optimum conditions for aquatic life (Texas Natural Resource Conservation Commission, 2000). Most of the water bodies on the list were assessed using water-column measures...
Cooperative Topographic Mapping Program
Water Resources Division, U.S. Geological Survey
2002, Fact Sheet 105-02
The mission of the Cooperative Topographic Mapping (CTM) Program of the U.S. Geological Survey (USGS) is to provide the Nation with access to current, accurate, and consistent base geographic data and derivative products, including topographic maps. The CTM Program has the lead responsibility to develop, maintain, and make available The...
The National Map - Elevation
Water Resources Division, U.S. Geological Survey
2002, Fact Sheet 106-02
Governments depend on a common set of base geographic information as a tool for economic and community development, land and natural resource management, and health and safety services. Emergency management and homeland security applications rely on this information. Private industry, nongovernmental organizations, and individual citizens use the same geographic data....