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Digital aeromagnetic map of the Nevada Test Site and vicinity, Nye, Lincoln, and Clark Counties, Nevada and Inyo County, California
David A. Ponce
2000, Open-File Report 99-554-B
An aeromagnetic map of the Nevada Test Site area was prepared from publicly available aeromagnetic data described by McCafferty and Grauch (1997). Magnetic surveys were processed using standard techniques. Southwest Nevada is characterized by magnetic anomalies that reflect the distribution of thick sequences of volcanic rocks, magnetic sedimentary rocks, and...
Map of Distribution of Bottom Sediments on the Continental Shelf, Gulf of Alaska
Kevin R. Evans, Paul R. Carlson, Monty A. Hampton, Michael S. Marlow, Peter W. Barnes
2000, Miscellaneous Field Studies Map 2335
Introduction The U.S. Geological Survey has a long history of exploring marine geology in the Gulf of Alaska. As part of a cooperative program with other federal and state agencies, the USGS is investigating the relations between ocean-floor geology and benthic marine biohabitats. This bottom sediment map, compiled from published literature...
Estimation of hydraulic parameters from an unconfined aquifer test conducted in a glacial outwash deposit, Cape Cod, Massachusetts
A.F. Moench, Stephen P. Garabedian, Denis R. LeBlanc
2000, Open-File Report 2000-485
An aquifer test conducted in a sand and gravel, glacial outwash deposit on Cape Cod, Massachusetts was analyzed by means of a model for flow to a partially penetrating well in a homogeneous, anisotropic unconfined aquifer. The model is designed to account for all significant mechanisms expected to influence drawdown...
Nitrate concentrations in ground water in the Henrys Fork Basin, eastern Idaho
D. J. Parliman
2000, Fact Sheet 029-00
In 1998 and 1999, the U.S. Geological Survey (USGS) completed comprehensive studies of nitrate concentrations in ground water in the Henrys Fork Basin in eastern Idaho (fig. 1A). These studies were done in cooperation with the following agencies or groups: Idaho Division of Environmental Quality (DEQ), District 7 Health Department,...
Digital isostatic gravity map of the Nevada Test Site and vicinity, Nye, Lincoln, and Clark Counties, Nevada, and Inyo County, California
David A. Ponce, E. A. Mankinen, J. G. Davidson, R. L. Morin, R.J. Blakely
2000, Open-File Report 99-554-C
An isostatic gravity map of the Nevada Test Site area was prepared from publicly available gravity data (Ponce, 1997) and from gravity data recently collected by the U.S. Geological Survey (Mankinen and others, 1999; Morin and Blakely, 1999). Gravity data were processed using standard gravity data reduction techniques. Southwest Nevada is...
Preliminary estimate of the amplification of possible earthquake ground motion at a site in Charleston County, South Carolina
Russell L. Wheeler, Chris H. Cramer
2000, Open-File Report 2000-484
We estimate site amplification at the location of a proposed bridge near Charleston, South Carolina. Model calculations indicate that amplification at periods of 1 s and longer is likely to be strongly influenced by the effects of a large contrast in shear-wave velocity at a depth of approximately 1 km (3,000 ft). On-site...
Water-quality data collected at Lake Anne, Reston, Virginia, 1997-1999
Kathryn M. Conko, Margaret M. Kennedy, Karen C. Rice
2000, Open-File Report 2000-481
Samples from the Lake Anne watershed were collected and analyzed to assess the water quality from December 1997 through January 1999. Lake Anne is a stream impoundment in suburban Northern Virginia and its outflow is a sub-tributary of the Potomac River. Samples of wet deposition (precipitation), lake water, and streamwater...
Benthic flux of metals and nutrients into the water column of Lake Coeur d'Alene, Idaho: Report of an August, 1999, pilot study
James S. Kuwabara, William M. Berelson, Laurie S. Balistrieri, Paul F. Woods, Brent R. Topping, Douglas J. Steding, David P. Krabbenhoft
2000, Water-Resources Investigations Report 2000-4132
A field study was conducted between August 16-27, 1999, to provide the first direct measurements of the benthic flux of dissolved (0.2-micron filtered) solutes between the bottom sediment and water column at two sites in Lake Coeur d'Alene, Idaho. Trace metals (namely, cadmium, copper, manganese, mercury species, and zinc) and...
Monitoring surface-water quality in Arizona: the fixed-station network
Saeid Tadayon
2000, Fact Sheet 028-00
Arizona is an arid State in which economic development is influenced largely by the quantity and quality of water and the location of adequate water supplies. In 1995, surface water supplied about 58 percent of total withdrawals in Arizona. Of the total amount of surface water used in 1995, about...
Transport of suspended and bedload sediment at eight stations in the Coeur d'Alene River basin, Idaho
Greg M. Clark, Paul F. Woods
2000, Open-File Report 2000-472
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. As part of the investigation, the U.S. Geological Survey designed and implemented...
Flood tracking chart for the Upper San Jacinto River Basin near Houston, Texas
Dana L. Barbie
2000, Open-File Report 2000-387
The “Flood Tracking Chart for the Upper San Jacinto River Basin near Houston, Texas” can be used to track river stage and to assess flood-crest information during substantial storms. Water-surface elevation during a flood will provide emergency-response personnel, residents, and the traveling general public essential information to make informed decisions...
Droughts in Georgia
Nancy L. Barber, Timothy C. Stamey
2000, Open-File Report 2000-380
Droughts do not have the immediate effects of floods, but sustained droughts can cause economic stress throughout the State. The word 'drought' has various meanings, depending on a person's perspective. To a farmer, a drought is a period of moisture deficiency that affects the crops under cultivation - even two...
Graphs and tables used to describe electrical measurements of samples of unconsolidated materials, USGS Petrophysical Laboratory, Denver
David L. Campbell, Robert Horton
2000, Open-File Report 2000-377
The U.S. Geological Survey Petrophysical Laboratory (PetLab) in Denver CO measures electrical properties of samples of earth materials collected by U.S. Geological Survey personnel. This report describes the standard graphs and tables produced by PetLab to present geoelectrical measurements made on samples of unconsolidated materials....
Velocity and stage data collected in a laboratory flume for water-surface slope determination using a pipe manometer
Jonathan K. Lee, H. M. Visser, H. L. Jenter, M. P. Duff
2000, Open-File Report 2000-393
U.S. Geological Survey (USGS) hydrologists and ecologist are conducting studies to quantify vegetative flow resistance in order to improve numerical models of surface-water flow in the Florida Everglades. Water-surface slope is perhaps the most difficult of the flow resistance parameters to measure in the Everglades due to the very low...
Aeromagnetic Survey of the Amargosa Desert, Nevada and California: A Tool for Understanding Near-Surface Geology and Hydrology
Richard J. Blakely, Victoria E. Langenheim, David A. Ponce, Gary L. Dixon
2000, Open-File Report 2000-188
A high-resolution aeromagnetic survey of the Amargosa Desert and surrounding areas provides insights into the buried geology of this structurally complex region. The survey covers an area of approximately 7,700 km2 (2,970 mi2), extending from Beatty, Nevada, to south of Shoshone, California, and includes parts of the Nevada Test Site...
Regional evaluation of evapotranspiration in the Everglades
E. R. German
2000, Water-Resources Investigations Report 2000-4217
Nine sites in the Florida Everglades were selected and instrumented for collection of data necessary for evapotranspiration-determination using the Bowen-ratio energy-budget method. The sites were selected to represent the sawgrass or cattail marshes, wet prairie, and open-water areas that constitute most of the natural Everglades system. At each site, measurements...
Detection of conduit-controlled ground-water flow in northwestern Puerto Rico using aerial photograph interpretation and geophysical methods
Jesús Rodríguez-Martínez, Ronald T. Richards
2000, Water-Resources Investigations Report 2000-4147
The development potential of ground-water resources in the karst limestone of northwestern Puerto Rico, in an area extending from the Río Camuy to Aguadilla, is uncertain as a result of limited knowledge of the location of areas where a high density of cavities (interconnected fractures, conduits, and other dissolution features)...
Assessment of potential for natural attenuation of chlorinated ethenes and ethanes in ground water at a petrochemical reclamation site, Harris County, Texas
Glenn F. Huff, Christopher L. Braun, Roger W. Lee
2000, Water-Resources Investigations Report 2000-4121
Redox conditions in the Numerous Sand Channels Zone beneath a petrochemical reclamation site in Harris County, Texas, range from sulfate reducing to methanogenic as indicated by the presence of methane in ground water and the range of molecular hydrogen concentrations. Assessment of the potential for reductive dechlorination using BIOCHLOR as...