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Page 2799, results 69951 - 69975

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Preliminary assessment of microbial communities and biodegradation of chlorinated volatile organic compounds in wetlands at Cluster 13, Lauderick Creek area, Aberdeen Proving Ground, Maryland
Michelle M. Lorah, Mary A. Voytek, Tracey A. Spencer
2003, Water-Resources Investigations Report 2003-4119
A preliminary assessment of the microbial communities and biodegradation processes for chlorinated volatile organic compounds was con-ducted by the U.S. Geological Survey in wetlands at the Cluster 13, Lauderick Creek area at Aberdeen Proving Ground, Maryland. The U.S. Geological Survey collected wetland sediment samples from 11 sites in the Lauderick...
Development, calibration, and analysis of a hydrologic and water-quality model of the Delaware Inland Bays watershed
Angelica L. Gutierrez-Magness, Jeff P. Raffensperger
2003, Water-Resources Investigations Report 2003-4124
Excessive nutrients and sediment are among the most significant environmental stressors in the Delaware Inland Bays (Rehoboth, Indian River, and Little Assawoman Bays). Sources of nutrients, sediment, and other contaminants within the Inland Bays watershed include point-source discharges from industries and wastewater-treatment plants, runoff and infiltration to ground water from...
Field guide to hydrothermal alteration in the White River altered area and in the Osceola Mudflow, Washington
David A. John, James J. Rytuba, Roger P. Ashley, Richard J. Blakely, James W. Vallance, Grant R. Newport, Gary R. Heinemeyer
2003, Bulletin 2217
The Cenozoic Cascades arcs of southwestern Washington are the product of long-lived, but discontinuous, magmatism beginning in the Eocene and continuing to the present (for example, Christiansen and Yeats, 1992). This magmatism is the result of subduction of oceanic crust beneath the North American continent. The magmatic rocks are divided...
The Role of Geoscience Information in Reducing Catastrophic Loss Using a Web-Based Economics Experiment
Richard L. Bernknopf, David S. Brookshire, Philip T. Ganderton
2003, Professional Paper 1683
What role can geoscience information play in the assessment of risk and the value of insurance, especially for natural hazard type risks? In an earlier, related paper Ganderton and others (2000) provided subjects with relatively simple geoscience information concerning natural hazard-type risks. Their research looked at how subjects purchase insurance...
Shallow Ground-Water Quality in Agricultural Areas of Northern Alabama and Middle Tennessee, 2000-2001
James A. Kingsbury
2003, Water-Resources Investigations Report 2003-4181
As part of the U.S. Geological Survey National Water-Quality Assessment Program, 32 monitoring wells were installed near cropland in parts of northern Alabama and Middle Tennessee to characterize the effect of row-crop agriculture on shallow ground-water quality. The wells were completed in regolith overlying carbonate bedrock. These geologic units are...
Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of organophosphate pesticides in whole water by continuous liquid-liquid extraction and capillary-column gas chromatography with flame photometric detection
Virendra K. Jha, Duane S. Wydoski
2003, Water-Resources Investigations Report 2003-4139
A method for the isolation of 20 parent organophosphate pesticides and 5 organophosphate pesticide degradates from natural-water samples is described. Compounds are extracted from water samples with methylene chloride using a continuous liquid-liquid extractor for 6 hours. The solvent is evaporated using heat and a flow of nitrogen to a...
Nutrient and chlorophyll relations in selected streams of the New England coastal basins in Massachusetts and New Hampshire, June-September 2001
Melissa L. Riskin, J. R. Deacon, M. L. Liebman, K. W. Robinson
2003, Water-Resources Investigations Report 2003-4191
The U.S. Environmental Protection Agency is developing guidance to assist states with defining nutrient criteria for rivers and streams and to better describe nutrient-algal relations. As part of this effort, 13 wadeable stream sites were selected, primarily in eastern Massachusetts, for a nutrient-assessment study during the summer of 2001. The...
Variations in sand storage measured at monumented cross sections in the Colorado River between Glen Canyon Dam and Lava Falls Rapid, northern Arizona, 1992-99
Marilyn E. Flynn, Nancy J. Hornewer
2003, Water-Resources Investigations Report 2003-4104
Bed elevations were measured at 131 monumented cross sections in the Colorado River between Glen Canyon Dam and Lava Falls Rapid from June 1992 to September 1999 to provide data on channel sand storage. This report documents the location of the 131 monumented cross sections, dates of measurements for all...
Simulation of streamflow and water quality in the Red Clay Creek subbasin of the Christina River Basin, Pennsylvania and Delaware, 1994-98
Lisa A. Senior, Edward H. Koerkle
2003, Water-Resources Investigations Report 2003-4138
The Christina River Basin drains 565 square miles (mi2) in Pennsylvania and Delaware and includes the major subbasins of Red Clay Creek, White Clay Creek, Brandywine Creek, and Christina River. The Red Clay Creek is the smallest of the subbasins and drains an area of 54 mi2. Streams in the...
Estimation of Monthly Evaporation from Lake Ashtabula in North Dakota, Orwell Lake in Minnesota, and Lake Traverse in Minnesota and South Dakota, 1931-2001
Kevin C. Vining
2003, Water-Resources Investigations Report 2003-4282
Reservoirs on tributaries of the Red River of the North provide water for Fargo and Grand Forks, N. Dak., and other cities along the river. Adequate estimates of evaporative losses from the reservoirs are needed to determine the total water supply in the Basin. Many equations could be used to...
Summary of extensometric measurements in El Paso, Texas
Charles E. Heywood
2003, Water-Resources Investigations Report 2003-4158
Two counter-weighted-pipe borehole extensometers were installed on the left bank of the Rio Grande between El Paso, Texas, and Ciudad Juarez, Chihuahua, Mexico, in 1992. A shallow extensometer measures vertical compaction in the 6- to 100-meter aquifer-system depth interval. A deep extensometer measures vertical compaction in the 6- to 305-meter...
Hydrogeology of the D aquifer and movement and ages of ground water determined from geochemical and isotopic analyses, Black Mesa area, northeastern Arizona
Margot Truini, Steve A. Longsworth
2003, Water-Resources Investigations Report 2003-4189
The Navajo Nation and the Hopi Tribe in the Black Mesa area depend on ground water from sandstones of the N aquifer for domestic, agricultural, municipal, and industrial needs. They are concerned that pumping of water from the N aquifer will induce leakage from the overlying D aquifer, resulting in...
Streambed adjustment and channel widening in eastern Nebraska
David L. Rus, Benjamin J. Dietsch, Andrew Simon
2003, Water-Resources Investigations Report 2003-4003
In eastern Nebraska, stream straightening and dredging efforts since the 1890s have disturbed the natural equilibrium of stream channels and have led to streambed adjustment by degradation and subsequent channel widening. This report describes a study to evaluate the effect these disturbances have had on stream channels in eastern Nebraska....
Geologic map of the Nelson quadrangle, Lewis and Clark County, Montana
Mitchell W. Reynolds, William H. Hays
2003, IMAP 2774
The geologic map of the Nelson quadrangle, scale 1:24,000, was prepared as part of the Montana Investigations Project to provide new information on the stratigraphy, structure, and geologic history of an area in the geologically complex southern part of the Montana disturbed belt. In the Nelson area, rocks ranging in...
Cadmium recycling in the United States in 2000
Jozef Plachy
2003, Circular 1196-O
Recycling of cadmium is a young and growing industry that has been influenced by environmental concerns and regulatory constraints. Domestic recycling of cadmium began in 1989 as a byproduct of processing of spent nickel-cadmium batteries. In 1995, International Metals Reclamation Co. Inc. expanded its operations by building a dedicated cadmium...
Manganese recycling in the United States in 1998
Thomas S. Jones
2003, Circular 1196-H
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...
Silver recycling in the United States in 2000
Henry E. Hilliard
2003, Circular 1196-N
In 2000, the global silver supply deficit (the difference between mine and scrap supply and silver demand) was more than 3,000 metric tons. U.S. silver demand for photographic applications alone was nearly equal to annual U.S. silver production. Until 1968, the U.S. silver deficit was filled by withdrawals from the...