Magnesium recycling in the United States in 1998
Deborah A. Kramer
2001, Open-File Report 2001-166
As concern for the environment has grown in recent years, the importance of recycling has become more evident. The more materials that are recycled, the fewer natural resources will be consumed and the fewer waste products will end up in landfills, in the water, and in the air. As one...
MODFLOW-2000, the U. S. Geological Survey modular ground-water model; user guide to the Link-AMG (LMG) package for solving matrix equations using an algebraic multigrid solver
S.W. Mehl, M. C. Hill
2001, Open-File Report 2001-177
Measurement of seafloor radioactivity at the Farallon Islands Radioactive Waste Dump Site, California
D.G. Jones, P. D. Roberts, J. Limburg, Herman A. Karl, J. L. Chin, Wayne C. Shanks, R. Hall, Daniel M. Howard
2001, Open-File Report 2001-62
No abstract available....
An individual-based model of rabbit viral haemorrhagic disease on European wild rabbits (Oryctolagus cuniculus)
John E. Fa, Colin M. Sharples, Diana J. Bell, Donald L. DeAngelis
2001, Ecological Modelling (144) 121-138
We developed an individual-based model of Rabbit Viral Hemorrhagic Disease (RVHD) for European wild rabbits (Oryctolagus cuniculus L.), representing up to 1000 rabbits in four hectares. Model output for productivity and recruitment matched published values. The disease was density-dependent and virulence affected outcome. Strains that caused death after several days produced...
The Kiowa core, a continuous drill core through the Denver Basin bedrock aquifers at Kiowa, Elbert County, Colorado
Robert G.H. Raynolds, Kirk R. Johnson, L. Rick Arnold, Timothy M. Farnham, R. Farley Fleming, Jason F. Hicks, Shari A. Kelley, Laura A. Lapey, Douglas J. Nichols, John D. Obradovich, Michael D. Wilson
2001, Open-File Report 2001-185
The Kiowa core was obtained as a component of the Denver Basin Project, a cooperative research effort to study the evolution of the Denver Basin, Colorado. The Kiowa core provides a virtually continuous stratigraphic record of the Upper Cretaceous and lower Tertiary strata of the Denver Basin. The upper portion...
Preliminary compilation of data for selected oil test wells in Northern California
Earl E. Brabb, Charles L. Powell II, Thomas M. Brocher
2001, Open-File Report 2001-152
Oil test wells can provide information on the depth, age, inclination, porosity, permeability, density, faulting, folding, and organic content of geologic formations mapped at the surface, or on units not recognized in surface outcrops. Formation density, as expressed in sonic and density logs commonly obtained when wells are drilled, has...
Monitoring and verifying changes of organic carbon in soil
W.M. Post, R. C. Izaurralde, L. K. Mann, Norman B. Bliss
2001, Climatic Change (51) 73-99
Changes in soil and vegetation management can impact strongly on the rates of carbon (C) accumulation and loss in soil, even over short periods of time. Detecting the effects of such changes in accumulation and loss rates on the amount of C stored in soil presents many challenges. Consideration of...
Mapping groundwater in three dimensions: An analysis of the airborne geophysical surveys of the upper San Pedro River basin, Cochise County, southeastern Arizona with an interpretation of where the groundwater lies
Jeffrey C. Wynn
2001, Open-File Report 2000-517
No abstract available....
Quantification of mine-drainage inflows to Little Cottonwood Creek, Utah, using a tracer-injection and synoptic-sampling study
B. Kimball, R. Runkel, L. Gerner
2001, Environmental Geology (40) 1390-1404
Historic mining in Little Cottonwood Canyon in Utah has left behind many mine drainage tunnels that discharge water to Little Cottonwood Creek. To quantify the major sources of mine drainage to the stream, synoptic sampling was conducted during a tracer injection under low flow conditions (September 1998). There were distinct...
Platinum recycling in the United States in 1998
Henry E. Hilliard
2001, Circular 1196-B
In the United States, catalytic converters are the major source of secondary platinum for recycling. Other sources of platinum scrap include reforming and chemical process catalysts. The glass industry is a small but significant source of platinum scrap. In North America, it has been estimated that in 1998 more than...
Variations in river flow to the Gulf of Mexico: implications for paleoenvironmental studies of Gulf of Mexico marine sediments
Richard Z. Poore, Jessica Darling, Harry J. Dowsett, Liana Wright
2001, Bulletin 2187
Analyses of selected gaging station records from the Mississippi River and Rio Grande show that variations in discharge of these rivers into the Gulf of Mexico reflect major flood events and regional-scale drought intervals known from the historical record. Variations in Rio Grande discharge show good correlation with El Ni?o/Southern...
Ground-water-level monitoring and the importance of long-term water-level data
Charles J. Taylor, William M. Alley
2001, Circular 1217
Water-level measurements from observation wells are the principal source of information about the effects of hydrologic stresses on ground-water systems. Long-term water-level data are required to address the effects of aquifer development and to compile a hydrologic record of water-level monitoring, uses of long-term water-level data, and improvements in the...
Geology, geochronology, geochemistry, and Pb-isotopic compositions of Proterozoic rocks, Poachie region, west-central Arizona — A study of the east boundary of the Proterozoic Mojave crustal province
Bruce Bryant, J. L. Wooden, L. David Nealey
2001, Professional Paper 1639
The Poachie region at the south edge of the Colorado Plateau transition zone in western Arizona is underlain by early and middle Proterozoic plutonic rocks locally separated by screens of amphibolite-facies early Proterozoic metamorphic rocks and is in the eastern part of the Mojave crustal province, as shown by 35...
Geochemistry of the Big Lost River drainage basin, Idaho
Colleen Carkeet, J.J. Rosentreter, R. C. Bartholomay, L.L. Knobel
2001, Water-Resources Investigations Report 2001-4031
SCIGN; new Southern California GPS network advances the study of earthquakes
Ken Hudnut, Nancy King
2001, Fact Sheet 069-01
Southern California is a giant jigsaw puzzle, and scientists are now using GPS satellites to track the pieces. These puzzle pieces are continuously moving, slowly straining the faults in between. That strain is then eventually released in earthquakes. The innovative Southern California Integrated GPS Network (SCIGN) tracks the motions of...
Water-quality data of soil water from three watersheds, Shenandoah National Park, Virginia, 1999-2000
Karen C. Rice, Suzanne W. Maben, James R. Webb
2001, Open-File Report 2001-236
Data on the chemical composition of soil-water samples were collected quarterly from three watersheds in Shenandoah National Park, Virginia, from September 1999 through July 2000. The soil-water samples were analyzed for specific conductance and concentrations of sodium, potassium, calcium, magnesium, ammonium, chloride, nitrate, sulfate, acid-neutralizing capacity, silica, and total monomeric...
Compilation of water-resources data and hydrogeologic setting for Brunswick County, North Carolina, 1933-2000
Jason M. Fine, William L. Cunningham
2001, Open-File Report 2001-240
Water-resources data were compiled for Brunswick County, North Carolina, to describe the hydrologic conditions of the County. Hydrologic data collected by the U.S. Geological Survey as well as data collected by other governmental agencies and reviewed by the U.S. Geological Survey are presented. Data from four weather stations and two...
African dust causes widespread environmental distress
E.A. Shinn
2001, Open-File Report 2001-246
Rainfall, Streamflow, and Water-Quality Data During Stormwater Monitoring, Halawa Stream Drainage Basin, Oahu, Hawaii, July 1, 2000 to June 30, 2001
Todd K. Presley
2001, Open-File Report 2001-256
The State of Hawaii Department of Transportation Stormwater Monitoring Program was implemented on January 1, 2001. The program includes the collection of rainfall, streamflow, and water-quality data at selected sites in the Halawa Stream drainage basin. Rainfall and streamflow data were collected from July 1, 2000 to June 30, 2001....
Uranium and radon in ground water in the lower Illinois River basin
William S. Morrow
2001, Water-Resources Investigations Report 2001-4056
Uranium and radon are present in ground water throughout the United States, along with other naturally occurring radionuclides. The occurrence and distribution of uranium and radon are of concern because these radionuclides are carcinogens that can be ingested through drinking water. As part of the U.S. Geological Survey (USGS) National...
Updating flood maps efficiently using existing hydraulic models, very-high-accuracy elevation data, and a geographic information system: A pilot study on the Nisqually River, Washington
Joseph L. Jones, Tana Haluska, David L. Kresch
2001, Water-Resources Investigations Report 2001-4051
A method of updating flood inundation maps at a fraction of the expense of using traditional methods was piloted in Washington State as part of the U.S. Geological Survey Urban Geologic and Hydrologic Hazards Initiative. Large savings in expense may be achieved by building upon previous Flood Insurance Studies and...
Measuring Taylor Slough boundary and internal flows, Everglades National Park, Florida
G.M. Tillis
2001, Open-File Report 2001-225
Four intensive data-collection efforts, intended to represent the spectrum of precipitation events and associated flow conditions, were conducted during 1997 and 1998 in the Taylor Slough Basin, Everglades National Park. Flow velocities were measured by newly developed, portable Acoustic Doppler Velocity meters along three transects bisecting the Taylor Slough Basin...
Magnetotelluric data across the Battle Mountain-Eureka and Carlin trends, near Battle Mountain, Nevada
Jackie M. Williams, Brian D. Rodriguez, Douglas P. Klein
2001, Open-File Report 2001-228
No abstract available....
Methods to quantify seepage beneath Levee 30, Miami-Dade County, Florida
R.S. Sonenshein
2001, Water-Resources Investigations Report 2001-4074
A two-dimensional, cross-sectional, finite-difference, ground-water flow model and a simple application of Darcy?s law were used to quantify ground-water flow (from a wetlands) beneath Levee 30 in Miami-Dade County, Florida. Geologic and geophysical data, vertical seepage data from the wetlands, canal discharge data, ground-water-level data, and surface-water-stage data collected during...
The distribution of MVT-related metals in acid-insoluble residues of Paleozoic rocks in the Ozark Plateaus region of the United States
Lopaka Lee, Martin B. Goldhaber
2001, Open-File Report 2001-42
