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Page 281, results 7001 - 7025

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National Irrigation Water Quality Program data-synthesis data base
Ralph L. Seiler, Joseph P. Skorupa
2001, Open-File Report 2000-513
Under the National Irrigation Water Quality Program (NIWQP) of the U.S. Department of the Interior, researchers investigated contamination caused by irrigation drainage in 26 areas in the Western United States from 1986 to 1993. From 1992 to 1995, a comprehensive relational data base was built to organize data collected during...
Laboratory measurements of electrical properties of composite mine dump samples from Colorado and New Mexico
Anita L. Anderson, David L. Campbell, Shay Beanland
2001, Open-File Report 2001-158
Individual mine waste samples were collected and combined to form one composite sample at each of eight mine dump sites in Colorado and New Mexico. The samples were air-dried and sieved to determine the geochemical composition of their <2mm size fraction. Splits of the samples were then rehydrated and their...
A comparative analysis of hazard models for predicting debris flows in Madison County, Virginia
Meghan M. Morrissey, Gerald F. Wieczorek, Benjamin A. Morgan
2001, Open-File Report 2001-67
During the rainstorm of June 27, 1995, roughly 330-750 mm of rain fell within a sixteen-hour period, initiating floods and over 600 debris flows in a small area (130 km2) of Madison County, Virginia. Field studies showed that the majority (70%) of these debris flows initiated with a thickness...
Photographs of the sea floor in western Massachusetts Bay, offshore of Boston, Massachusetts, July, 1999
Benjamin T. Gutierrez, Bradford Butman, Dann S. Blackwood
2001, Open-File Report 2000-427
This CD-ROM contains photographs and sediment sample analyses of the sea floor obtained at 142 sites in western Massachusetts Bay (Figure 1) during a research cruise (USGS cruise ISBL99024) aboard the Fishing Vessel (FV) Isabel S. (Figure 2) conducted July 18-21, 1999. These photographs and samples provide critical ground...
Statistical Summary of Hydrologic and Water-Quality Data from the Halawa, Haiku, and Kaneohe Drainage Basins Before, During, and After H-3 Highway Construction, Oahu, Hawaii, 1983-99
Michael F. Wong, Stacie T. M. Young
2001, Open-File Report 2001-64
This report provides statistical summaries of rainfall, streamflow, suspended-sediment, and water-quality data collected in the Halawa, Haiku, and Kaneohe drainage basins before, during, and after construction of the H-3 Highway on the island of Oahu, Hawaii. Methods of data collection also are described. Data collected during water years 1983 through...
Assessment of landslide hazards resulting from the February 13, 2001, El Salvador earthquake; a report to the government of El Salvador and the U. S. Agency for International Development
Rex L. Baum, Anthony J. Crone, Demetreo Escobar, Edwin L. Harp, Jon J. Major, Mauricio Martinez, Carlos Pullinger, Mark E. Smith
2001, Open-File Report 2001-119
On February 13, 2001, a magnitude 6.5 earthquake occurred about 40 km eastsoutheast of the capital city of San Salvador in central El Salvador and triggered thousands of landslides in the area east of Lago de Ilopango. The landslides are concentrated in a 2,500-km2 area and are particularly abundant in areas underlain by thick deposits of poorly consolidated, late Pleistocene and...
The radiated seismic energy and apparent stress of interplate and intraplate earthquakes at subduction zone environments; implications for seismic hazard estimation
George L. Choy, John L. Boatwright, Stephen H. Kirby
2001, Open-File Report 2001-5
The radiated seismic energies (ES) of 980 shallow subduction-zone earthquakes with magnitudes ? 5.8 are used to examine global patterns of energy release and apparent stress. In contrast to traditional methods which have relied upon empirical formulas, these energies are computed through direct spectral analysis of broadband seismic waveforms. Energy...
Simple Techniques For Assessing Impacts Of Oil And Gas Operations On Public Lands: A Field Evaluation Of A Photoionization Detector (PID) At A Condensate Release Site, Padre Island National Seashore, Texas
James K. Otton, Robert A. Zielinski
2001, Open-File Report 2001-183
Simple, cost-effective techniques are needed for land managers to assess the environmental impacts of oil and gas production activities on public lands, so that sites may be prioritized for remediation or for further, more formal assessment. Field-portable instruments provide real-time data and allow the field investigator to extend an assessment...
Vegetative resistance to flow in South Florida: Summary of vegetation sampling in Taylor Slough, Everglades National Park, September 1997–July 1998
N. B. Rybicki, J. T. Reel, H. Ruhl, P. A. Gammon, Virginia Carter
2001, Open-File Report 2001-102
The U.S. Geological Survey is one of many agencies providing scientific support to the effort to restore the South Florida Everglades. In September and November 1997 and July 1998, vegetation was sampled at selected sites in the Everglades as part of a study to quantify vegetative resistance to flow. The...