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Page 280, results 6976 - 7000

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Methods of analysis by the U.S. Geological Survey Organic Geochemistry Research Group--Update and additions to the determination of chloroacetanilide herbicide degradation compounds in water using high-performance liquid chromatography/mass spectrometry
E.A. Lee, J.L. Kish, L.R. Zimmerman, E. Thurman
2001, Open-File Report 2001-10
An analytical method using high-performance liquid chromatography/mass spectrometry (HPLC/MS) was developed by the U.S. Geological Survey in 1999 for the analysis of selected chloroacetanilide herbicide degradation compounds in water. These compounds were acetochlor ethane sulfonic acid (ESA), acetochlor oxanilic acid (OXA), alachlor ESA, alachlor OXA, metolachlor ESA, and metolachlor OXA....
Selected data for sediment cores collected in Chesapeake Bay in 1996 and 1998
P.C. Baucom, J.F. Bratton, Steven M. Colman, Jennifer M. Moore, John W. King, Chip Seal, R.R. Seal II
2001, Open-File Report 2001-194
As part of a study of recent history of the Chesapeake Bay ecosystem, one- to eight- meter long sediment cores were obtained from the mesohaline section of the Chesapeake Bay between the mouths of the Potomac and Rhode Rivers. The sediments consist of three lithofacies: coarse-grained channel deposits, restricted-estuary sands...
Continental shelf GIS for the Monterey Bay National Marine Sanctuary
Florence L. Wong, Stephen L. Eittreim
2001, Open-File Report 2001-179
A marine sanctuary is an environment where the interests of science and society meet. Sanctuary managers need access to the best scientific data available that describe the environment and environmental processes in sanctuaries. Seafloor mapping and sampling in the Monterey Bay National Marine Sanctuary have revealed new details about the...
Sea floor maps showing topography, sun-illuminated topographic imagery, and backscatter intensity of the Stellwagen Bank National Marine Sanctuary Region off Boston, Massachusetts
P. C. Valentine, T. J. Middleton, S. J. Fuller
2001, Open-File Report 2000-410
This data set contains the sea floor topographic contours, sun-illuminated topographic imagery, and backscatter intensity generated from a multibeam sonar survey of the Stellwagen Bank National Marine Sanctuary region off Boston, Massachusetts, an area of approximately 1100 square nautical miles. The Stellwagen Bank NMS Mapping Project is designed to provide...
Concentrations and loads of cadmium, lead, and zinc measured on the ascending and descending limbs of the 1999 snowmelt-runoff hydrographs for nine water-quality stations, Coeur d'Alene River basin, Idaho
Paul F. Woods
2001, Open-File Report 2000-310
The Remedial Investigation/Feasibility Study conducted by the U.S. Environmental Protection Agency within the Spokane River Basin of northern Idaho and eastern Washington included extensive data-collection activities to determine the nature and extent of trace-element contamination within the basin. The U.S. Geological Survey designed and implemented synoptic sampling of a high-flow...
Summary of trends and status analysis for flow, nutrients, and sediments at selected nontidal sites, Chesapeake Bay basin, 1985-99
M. J. Langland, R. E. Edwards, L.A. Sprague, S.E. Yochum
2001, Open-File Report 2001-73
Water-quality and flow data from 31 sites in nontidal portions of the Chesapeake Bay Basin were analyzed to document annual nutrient and sediment loads and trends for the period 1985 through 1999 as part of an annual reevaluation and reporting for the Chesapeake Bay Program. Annual loads were estimated by...
Hydrogeology and physical characteristics of water samples at the Red River aluminum site, Stamps, Arkansas, April 2001
John B. Czarnecki, Gregory P. Stanton, David A. Freiwald
2001, Open-File Report 2001-201
The Red River Aluminum site near Stamps, Arkansas, contains waste piles of salt cake and metal byproducts from the smelting of aluminum. The waste piles are subjected to about 50 inches of rainfall a year, resulting in the dissolution of the salts and metal. To assess the potential threat to...
Results of the U. S. Geological Survey's analytical evaluation program for standard reference samples distributed in October 2000
B.F. Connor, J.P. Currier, M.T. Woodworth
2001, Open-File Report 2001-137
This report presents the results of the U.S. Geological Survey's analytical evaluation program for six standard reference samples -- T-163 (trace constituents), M-156 (major constituents), N-67 (nutrient constituents), N-68 (nutrient constituents), P-35 (low ionic strength constituents), and Hg-31 (mercury) -- that were distributed in October 2000 to 126 laboratories enrolled...
Observations and recommendations regarding landslide hazards related to the January 13, 2001 M-7.6 El Salvador earthquake
Randall W. Jibson, Anthony J. Crone
2001, Open-File Report 2001-141
The January 13, 2001 earthquake (M-7.6) off the coast of El Salvador triggered widespread damaging landslides in many parts of the El Salvador. In the aftermath of the earthquake, the Salvadoran government requested technical assistance through the U.S. Agency for International Development (USAID); USAID, in turn, requested help from technical...