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37001 results.

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Page 281, results 7001 - 7025

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Ecological characterization of streams, and fish-tissue analysis for mercury and lead at selected locations, Fort Gordon, Georgia, June 1999 to May 2000
M. Brian Gregory, Timothy C. Stamey, John B. Wellborn
2001, Open-File Report 2001-203
The U.S. Geological Survey, in cooperation with the Environmental and Natural Resources Management Office of the U.S. Army Signal Center and Fort Gordon, Ga., documented the ecological condition of selected water-bodies on the Fort Gordon military installation from June 1999 to May 2000. This study includes stream-habitat assessments, aquatic invertebrate...
A Microsoft Windows version of the MARK3 Monte Carlo resource simulator
Joseph S. Duval
2001, Open-File Report 2000-415
This publication includes a version of the MARK3 Monte Carlo resource simulator that will run under Microsoft Windows 98, NT, and 2000. The disc also includes grade and tonnage information and related deposit model files that allow the user to calculate probability curves for mineral resources. A total of 113...
Ground-water levels and water-quality data for wells in the Spring Creek area near Arnold Air Force Base, Tennessee, April and May 2000
Shannon D. Williams, Robert A. Aycock
2001, Open-File Report 2001-150
Arnold Air Force Base (AAFB) occupies about 40,000 acres in Coffee and Franklin Counties, Tennessee. Numerous site-specific ground-water contamination investigations have been conducted at designated solid waste management units (SWMU?s) at AAFB. Several synthetic volatile organic compounds (VOC?s), primarily chlorinated solvents, have been identified in groundwater samples collected from monitoring...
Hydraulic and mechanical properties affecting ground-water flow and aquifer-system compaction, San Joaquin Valley, California
Michelle Sneed
2001, Open-File Report 2001-35
This report summarizes hydraulic and mechanical properties affecting ground-water flow and aquifer-system compaction in the San Joaquin Valley, a broad alluviated intermontane structural trough that constitutes the southern two-thirds of the Central Valley of California. These values will be used to constrain a coupled ground-water flow and aquifer-system compaction model...
Examination of native fish recruitment and description of the fish communities found in the San Juan and Colorado River interface zones of Lake Powell, Utah
Gordon Mueller, Mike Horn, Quent Bradwisch, Lewis Boobar
2001, Open-File Report 2001-159
Researchers examined the fish communities of the Colorado and San Juan river interface zones of Lake Powell during 1999 and 2000. The objectives were to: (1) search for young razorback sucker and Colorado pikeminnow and, if found, RIT tag them; (2) examine the effectiveness of the various collection techniques...
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...
Basin-centered gas systems of the U.S.
Marin A. Popov, Vito F. Nuccio, Thaddeus S. Dyman, Timothy A. Gognat, Ronald C. Johnson, James W. Schmoker, Michael S. Wilson, Charles E. Bartberger
2001, Open-File Report 2001-135
Basin-center accumulations, a type of continuous accumulation, have spatial dimensions equal to or exceeding those of conventional oil and gas accumulations, but unlike conventional fields, cannot be represented in terms of discrete, countable units delineated by downdip hydrocarbon-water contacts. Common geologic and production characteristics of continuous accumulations include their occurrence...
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...