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3805 results.

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Page 82, results 2026 - 2050

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Did you feel it? : citizens contribute to earthquake science
David J. Wald, James W. Dewey
2005, Fact Sheet 2005-3016
Since the early 1990s, the magnitude and location of an earthquake have been available within minutes on the Internet. Now, as a result of work by the U.S. Geological Survey and with the cooperation of various regional seismic networks, people who experience an earthquake can go online and share information...
Acoustic doppler velocity monitoring within Main Spring, Barton Springs, Austin, Texas, April-September 2004-enhancing the accuracy of springflow data
W.H. Asquith, M.O. Gary
2005, Fact Sheet 2005-3044
Acoustic Doppler velocity (ADV) meters are sophisticated underwater monitoring instruments that use sound waves to measure water velocity in as many as three directions. In April 2004, an ADV meter was installed inside the principal orifice and discharge point of Main Spring at Barton Springs in Austin, Texas. This instrument...
Ground-water vulnerability to nitrate contamination in the mid-atlantic region
Earl A. Greene, Andrew E. LaMotte, Kerri-Ann Cullinan, Elizabeth R. Smith
2005, Fact Sheet 2004-3067
The U.S. Environmental Protection Agency?s (USEPA) Regional Vulnerability Assessment (ReVA) Program has developed a set of statistical tools to support regional-scale, integrated ecological risk-assessment studies. One of these tools, developed by the U.S. Geological Survey (USGS), is used with available water-quality data obtained from USGS National Water-Quality Assessment (NAWQA) and...
USGS California Water Science Center water programs in California
Michael V. Shulters
2005, Fact Sheet 2005-3046
California is threatened by many natural hazards—fire, floods, landslides, earthquakes. The State is also threatened by longer-term problems, such as hydrologic effects of climate change, and human-induced problems, such as overuse of ground water and degradation of water quality. The threats and problems are intensified by increases in population, which...
Assessing sandhill crane roosting habitatalong the Platte River, Nebraska
P.J. Kinzel, J. M. Nelson, R. S. Parker
2005, Fact Sheet 2005-3029
Each spring approximately 500,000 sandhill cranes and some endangered whooping cranes use the Central Platte River Valley in Nebraska as a staging habitat during their migration north to breeding and nesting grounds in Canada, Alaska, and the Siberian Arctic. Over the last century changes in the flow of the river...
People and water in the Assabet River basin, eastern Massachusetts
Leslie A. DeSimone
2005, Fact Sheet 2005-3034
An accounting of the inflows, outflows, and uses of water in the rapidly developing Assabet River Basin, along Interstate 495 in eastern Massachusetts, was done to quantify how people's activities alter the hydrologic system. The study identified subbasins and seasons in which outflows resulting from people's activities were relatively large...
Communicating science
Gaye S. Farris
2005, Fact Sheet 2005-3042
For science to have an impact, it must be communicated and easily accessible. The USGS National Wetlands Research Center communicates its research findings through several ways: publishing, the Web, the library, and education and outreach....
Mercury contamination from historical gold mining in California
Charles N. Alpers, Michael P. Hunerlach, Jason T. May, Roger L. Hothem
2005, Fact Sheet 2005-3014
Mercury contamination from historical gold mines represents a potential risk to human health and the environment. This fact sheet provides background information on the use of mercury in historical gold mining and processing operations in California, with emphasis on historical hydraulic mining areas. It also describes results of recent USGS...
PAGER - Rapid Assessment and Notification of an Earthquake's Impact
Paul S. Earle, David J. Wald, Lynda A. Lastowka
2005, Fact Sheet 2005-3026
PAGER (Prompt Assessment of Global Earthquakes for Response) is an automated alarm system being developed to rapidly and accurately assess the severity of damage caused by an earthquake and to provide emergency relief organizations, government agencies, and the media with an estimate of the societal impact from the potential catastrophe....
The National Research Program in the hydrological sciences
Water Resources Division, U.S. Geological Survey
2005, Fact Sheet 2005-3015
The National Research Program (NRP) in the hydrological sciences encompasses a broad spectrum of scientific investigations and focuses on long-term integrated studies related to water resource and environmental problems. The NRP provides an infrastructure within which the USGS can develop new information, theories, and techniques to understand, anticipate, and solve...
Floods in southwest-central Florida from hurricane Frances, September 2004
Richard L. Kane
2005, Fact Sheet 2005-3028
Hurricane Frances brought heavy rainfall and widespread flooding to southwest-central Florida September 4-14, 2004. The center of Hurricane Frances made landfall on the east coast of Florida on September 5 as a category 2 hurricane on the Saffir-Simpson scale, then moved west-northwestward through central Florida before exiting Pasco County into...
The status of streamflow and ground-water-level monitoring networks in Maryland, 2005
James M. Gerhart, Emery T. Cleaves
2005, Fact Sheet 2005-3030
The monitoring of streamflow and ground-water levels in Maryland is vitally important to the effective management and protection of the State?s water resources. Streamflow and ground-water-level monitoring networks have been operated for many years in Maryland, and in recent years, these networks have been redesigned to improve their efficiency. Unfortunately,...
Distance to nearest road in the conterminous United States
Raymond D. Watts
2005, Fact Sheet 2005-3011
The USGS Geographic Analysis and Monitoring (GAM) program has developed a national, high resolution dataset that gives the distance to the nearest road every 30 meters across the conterminous 48 states.  This work provides the first unified national picture of roadless space, vehicular accessibility, and intensity of road construction.   The...
Distinguishing between debris flows and floods from field evidence in small watersheds
Thomas C. Pierson
2005, Fact Sheet 2004-3142
Post-flood indirect measurement techniques to back-calculate flood magnitude are not valid for debris flows, which commonly occur in small steep watersheds during intense rainstorms. This is because debris flows can move much faster than floods in steep channel reaches and much slower than floods in low-gradient reaches. In addition, debris-flow...