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Page 3063, results 76551 - 76575

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Ground-water flow to Death Valley, as inferred from the chemistry and geohydrology of selected springs in Death Valley National Park, California and Nevada
William C. Steinkampf, William L. Werrell
2001, Water-Resources Investigations Report 98-4114
Death Valley lies downgradient from adjacent valleys to the north, south, east, and west in California and Nevada, and is the site of substantial ground-water discharge. The sources of the discharging waters have been discussed by several investigators in the past and are of heightened concern because of the potential disposal of high-level radioactive waste at Yucca...
The search for reliable aqueous solubility (Sw) and octanol-water partition coefficient (Kow) data for hydrophobic organic compounds; DDT and DDE as a case study
James Pontolillo, R.P. Eganhouse
2001, Water-Resources Investigations Report 2001-4201
The accurate determination of an organic contaminant’s physico-chemical properties is essential for predicting its environmental impact and fate. Approximately 700 publications (1944–2001) were reviewed and all known aqueous solubilities (Sw) and octanol-water partition coefficients (Kow) for the organochlorine pesticide, DDT, and its persistent metabolite, DDE were compiled and examined. Two...
Investigation of dioxin concentrations in the lower Roanoke River basin, North Carolina, February 26-March 7, 2001
K. F. Miller, D. A. Walters
2001, Open-File Report 2001-345
Dioxin is a toxic chemical that, when present in the environment, can cause cancer and birth defects in humans. Dioxin is of particular concern because concentrations of dioxin that were released into the environment many years ago remain a contributing factor to current exposure. Dioxin exposure often occurs in surface-water...
Quality-assurance data, comparison to water-quality standards, and site considerations for total dissolved gas and water temperature, lower Columbia River, Oregon and Washington, 2001
Dwight Q. Tanner, Heather M. Bragg
2001, Water-Resources Investigations Report 2001-4273
Significant Findings For eight monitoring sites, in water year 2001, an average of 99.3% of the total-dissolved-gas data were received in real time and passed quality-assurance checks. After 2 to 3 weeks of deployment in the river, most comparisons of field total-dissolved-gas sensors with a secondary standard (another calibrated total-dissolved-gas sensor) were...
Geologic map of the Winona Quadrangle, Shannon County, Missouri
R. C. Orndorff, R.W. Harrison
2001, IMAP 2749
The bedrock exposed in the Winona Quadrangle, Missouri, comprises Mesoproterozoic aged volcanic rocks overlain by Late Cambrian and Early Ordovician aged dolomite, sandstone, and chert. The sedimentary rocks are nearly flat-lying except where they drape around knobs of the volcanic rocks or where they are adjacent to faults. The...
Mineral resources: Out of the ground... into our daily lives
Dave Frank, Judy Weathers, John Galloway
2001, Open-File Report 2001-360
Minerals and mineral resources are a part of our everyday lives. This poster depicts a home and shows the different mineral(s) and mineral materials used to make the various products found in the average home....
Coal-bed gas resources of the Rocky Mountain region
Christopher J. Schenk, V. F. Nuccio, R. M. Flores, R. C. Johnson, S. B. Roberts, T. S. Collett
2001, Fact Sheet 110-01
The Rocky Mountain region contains several sedimentary provinces with extensive coal deposits and significant accumulations of coal-bed gas. This summary includes coal-bed gas resources in the Powder River Basin (Wyoming and Montana), Wind River Basin (Wyoming), Southwest Wyoming (Greater Green River Basin of Wyoming, Colorado, and Utah), Uinta-Piceance Basin (Colorado...
Hydrologic data and a proposed water-quality monitoring network for the Kobuk River basin, Gates of the Arctic National Park and Preserve, and Kobuk Valley National Park, Alaska
Timothy P. Brabets
2001, Water-Resources Investigations Report 2001-4141
Located in northwestern Alaska, the Kobuk River drains a watershed of approximately 12,300 square miles. Two national parks are located in the basin: the entire Kobuk Valley National Park and and a portion of Gates of the Arctic National Park and Preserve. Reconnaissance-type water-quality data collected on the Kobuk River...
National Atlas of the United States Maps
Water Resources Division, U.S. Geological Survey
2001, Fact Sheet 086-01
The "National Atlas of the United States of America®", published by the U.S. Geological Survey (USGS) in 1970, is out of print, but many of its maps can be purchased separately. Maps that span facing pages in the atlas are printed on one sheet. Maps dated after 1970 and before...
Mercury in U.S. coal; abundance, distribution, and modes of occurrence
Susan J. Tewalt, Linda J. Bragg, Robert B. Finkelman
2001, Fact Sheet 095-01
The U.S. Geological Survey (USGS) has compiled a nationwide coal information database over the last 25 years. A subset of the data, called COALQUAL, contains analyses of over 7,000 coal samples that have been collected or calculated to represent the entire thickness of a coal bed in the ground. The...
New mapping techniques help assess the health of Hawaii's coral reefs
M.E. Field, P.S. Chavez Jr., K.R. Evans, S.A. Cochran
2001, Fact Sheet 084-01
The U.S. Geological Survey (USGS) is working closely with academic institutions and state and Federal agencies to assess the factors that affect the health of Hawaii's and our Nation's coral reefs. In order to establish a basis from which scientists can objectively detect changes in reef health, the USGS and...
Economic and environmental evaluations of extractable coal resources conducted by the U. S. Geological Survey
M.S. Ellis, T.J. Rohrbacher, M.D. Carter, C. L. Molnia, L. M. Osmonson, D.C. Scott
2001, Fact Sheet 109-01
The Economic and Environmental Evaluations of Extractable Coal Resources (E4CR) project integrates economic analyses of extractable coal resources with environmental and coal quality considerations in order to better understand the contribution that coal resources can make to help meet the Nation’s future energy needs. The project utilizes coal resource information...
Characterization of surface-water quality based on real-time monitoring and regression analysis, Quivira National Wildlife Refuge, south-central Kansas, December 1998 through June 2001
Victoria G. Christensen
2001, Water-Resources Investigations Report 2001-4248
Because of the considerable wildlife benefits offered by the Quivira National Wildlife Refuge in south-central Kansas, there is a desire to ensure suitable water quality. To assess the quality of water flowing from Rattlesnake Creek into the refuge, the U.S. Geological Survey collected periodic water samples from December 1998 through...
Methods of analysis by the U.S. Geological Survey Organic Geochemistry Research Group—Determination of glyphosate, aminomethylphosphonic acid, and glufonsinate in water using online solid-phase extraction and high-performance liquid chromatography/mass spectrometry
E.A. Lee, A.P. Strahan, E.M. Thurman
2001, Open-File Report 2001-454
An analytical method for the determination of glyphosate, its principal degradation compound, aminomethylphosphonic acid (AMPA), and glufosinate in water with varying matrices has been developed. Four different sample matrices fortified at 0.2 and 2.0 μg/L (micrograms per liter) were analyzed using precolumn derivatization with 9-fluorenylmethylchloroformate (FMOC). After derivatization, cleanup and...