Porphyry copper deposits of the world: database, map, and grade and tonnage models
Donald A. Singer, Vladimir Iosifovich Berger, Barry C. Moring
2005, Open-File Report 2005-1060
Mineral deposit models are important in exploration planning and quantitative resource assessments for two reasons: (1) grades and tonnages among deposit types are significantly different, and (2) many types occur in different geologic settings that can be identified from geologic maps. Mineral deposit models are the keystone in combining the...
Thermal maturity patterns (CAI and %Ro) in the Ordovician and Devonian rocks of the Appalachian basin in West Virginia
John E. Repetski, Robert T. Ryder, Katharine Lee Avary, Michael H. Trippi
2005, Open-File Report 2005-1078
The objective of this study is to enhance existing thermal maturity maps in West Virginia by establishing: 1) new subsurface CAI data points for the Ordovician and Devonian and 2) new %Ro and Rock Eval subsurface data points for Middle and Upper Devonian black shale units. Thermal maturity values for...
Simulated water-level responses, ground-water fluxes, and storage changes for recharge scenarios along Rillito Creek, Tucson, Arizona
John P. Hoffmann, Stanley A. Leake
2005, Scientific Investigations Report 2004-5286
A local ground-water flow model is used to simulate four recharge scenarios along Rillito Creek in northern Tucson to evaluate mitigating effects on ground-water deficits and water-level declines in Tucson's Central Well Field. The local model, which derives boundary conditions from a basin-scale model, spans the 12-mile reach of Rillito...
Hydrogeologic framework, ground-water quality, and simulation of ground-water flow at the Fair Lawn Well Field Superfund site, Bergen County, New Jersey
Jean C. Lewis-Brown, Donald E. Rice, Robert Rosman, Nicholas P. Smith
2005, Scientific Investigations Report 2004-5280
Production wells in the Westmoreland well field, Fair Lawn, Bergen County, New Jersey (the 'Fair Lawn well field Superfund site'), are contaminated with volatile organic compounds, particularly trichloroethylene, tetrachloroethylene, and 1,1,1-trichloroethane. In 1983, the U.S. Environmental Protection Agency (USEPA) placed the Westmoreland well field on its National Priority List of...
Classification of hydrogeologic areas and hydrogeologic flow systems in the basin and range physiographic province, southwestern United States
David W. Anning, Alice D. Konieczki
2005, Professional Paper 1702
The hydrogeology of the Basin and Range Physiographic Province in parts of Arizona, California, New Mexico, Utah, and most of Nevada was classified at basin and larger scales to facilitate information transfer and to provide a synthesis of results from many previous hydrologic investigations. A conceptual model for the spatial...
Evaluation of unsaturated-zone solute-transport models for studies of agricultural chemicals
Bernard T. Nolan, E. Randall Bayless, Christopher T. Green, Sheena Garg, Frank D. Voss, David C. Lampe, Jack E. Barbash, Paul D. Capel, Barbara A. Bekins
2005, Open-File Report 2005-1196
Seven unsaturated-zone solute-transport models were tested with two data sets to select models for use by the Agricultural Chemical Team of the U.S. Geological Survey's National Water-Quality Assessment Program. The data sets were from a bromide tracer test near Merced, California, and an atrazine study in the White River Basin,...
Use of a ground-water flow model to delineate contributing areas to the Puchack Well Field, Pennsauken township and vicinity, Camden county, New Jersey
Daryll A. Pope, Martha K. Watt
2005, Scientific Investigations Report 2004-5101
The New Jersey Department of Environmental Protection (NJDEP) Well Head Protection Program, developed in response to the 1986 Federal Safe Drinking Water Act Amendments, requires delineation of Well Head Protection Areas (WHPA's), commonly called contributing areas, for all public and non-community water-supply wells in New Jersey. Typically, WHPA's for public...
Ground-water flow and water quality in the Upper Floridan aquifer, southwestern Albany area, Georgia, 1998-2001
Debbie Warner, Stephen J. Lawrence
2005, Scientific Investigations Report 2005-5047
During 1997, the Dougherty County Health Department sampled more than 700 wells completed in the Upper Floridan aquifer in Dougherty County, Georgia, and determined that nitrate as nitrogen (hereinafter called nitrate) concentrations were above 10 milligrams per liter (mg/L) in 12 percent of the wells. Ten mg/L is the Georgia...
Effects of land-use changes and stormflow-detention basins on flooding and nonpoint-source pollution, in Irondequoit Creek basin, Monroe and Ontario counties, New York--application of a precipitation-runoff model
William F. Coon, Mark S. Johnson
2005, Scientific Investigations Report 2005-5070
Urbanization of the 150-square-mile Irondequoit Creek basin in Monroe and Ontario Counties, N.Y., continues to spread southward and eastward from the City of Rochester, on the shore of Lake Ontario. Conversion of forested land to other uses over the past 40 years has increased to the extent that more than...
Questa baseline and pre-mining ground-water quality investigation. 14. Interpretation of ground-water geochemistry in catchments other than the Straight Creek catchment, Red River Valley, Taos County, New Mexico, 2002-2003
D. Kirk Nordstrom, R. Blaine McCleskey, Andrew G. Hunt, Cheryl A. Naus
2005, Scientific Investigations Report 2005-5050
The U.S. Geological Survey, in cooperation with the New Mexico Environment Department, is investigating the pre-mining ground-water chemistry at the Molycorp molybdenum mine in the Red River Valley, New Mexico. The primary approach is to determine the processes controlling ground-water chemistry at an unmined, off-site but proximal analog. The Straight...
Analysis and mapping of post-fire hydrologic hazards for the 2002 Hayman, Coal Seam, and Missionary Ridge wildfires, Colorado
J. G. Elliott, M.E. Smith, M.J. Friedel, M. R. Stevens, C. R. Bossong, D. W. Litke, R. S. Parker, C. Costello, J. Wagner, S.J. Char, M.A. Bauer, S.R. Wilds
2005, Scientific Investigations Report 2004-5300
Wildfires caused extreme changes in the hydrologic, hydraulic, and geomorphologic characteristics of many Colorado drainage basins in the summer of 2002. Detailed assessments were made of the short-term effects of three wildfires on burned and adjacent unburned parts of drainage basins. These were the Hayman, Coal Seam, and Missionary Ridge...
Development and analysis of regional curves for streams in the non-urban valley and ridge physiographic province, Maryland, Virginia, and West Virginia
Jefferson N. Keaton, Terence Messinger, Edward J. Doheny
2005, Scientific Investigations Report 2005-5076
Regression relations for bankfull stream characteristics based on drainage area (often called 'regional curves') are used in natural stream channel design to verify field determinations of bankfull discharge and stream channel characteristics. Bankfull stream characteristics were assessed for stream reaches at 41 streamflow-gaging stations in the Valley and Ridge Physiographic...
Simulation of ground-water flow in coastal Georgia and adjacent parts of South Carolina and Florida-predevelopment, 1980, and 2000
Dorothy F. Payne, Malek Abu Rumman, John S. Clarke
2005, Scientific Investigations Report 2005-5089
A digital model was developed to simulate steady-state ground-water flow in a 42,155-square-mile area of coastal Georgia and adjacent parts of South Carolina and Florida. The model was developed to (1) understand and refine the conceptual model of regional ground-water flow, (2) serve as a framework for the development of...
Simulated changes in water levels caused by potential changes in pumping from shallow aquifers of Virginia Beach, Virginia
Barry S. Smith
2005, Scientific Investigations Report 2005-5067
A steady-state ground-water flow model of the southern watersheds of Virginia Beach, Virginia, was refined and used to simulate changes in aquifer water levels caused by potential changes in pumping in the Transition Area of Virginia Beach, Va., a 20-square mile planning zone that runs through the middle of the...
Sensitivity of alpine and subalpine lakes to acidification from atmospheric deposition in Grand Teton National Park and Yellowstone National Park, Wyoming
Leora Nanus, Donald H. Campbell, Mark W. Williams
2005, Scientific Investigations Report 2005-5023
The sensitivity of 400 lakes in Grand Teton and Yellowstone National Parks to acidification from atmospheric deposition of nitrogen and sulfur was estimated based on statistical relations between acid-neutralizing capacity concentrations and basin characteristics to aid in the design of a long-term monitoring plan for Outstanding Natural Resource Waters. Acid-neutralizing...
Occurrence of fecal-indicator bacteria and protocols for identification of fecal-contamination sources in selected reaches of the West Branch Brandywine Creek, Chester County, Pennsylvania
Peter J. Cinotto
2005, Scientific Investigations Report 2005-5039
The presence of fecal-indicator bacteria indicates the potential presence of pathogens originating from the fecal matter of warm-blooded animals. These pathogens are responsible for numerous human diseases ranging from common diarrhea to meningitis and polio. The detection of fecal-indicator bacteria and interpretation of the resultant data are, therefore, of great...
Water-Quality Assessment of the Yellowstone River Basin, Montana and Wyoming-Water Quality of Fixed Sites, 1999-2001
Kirk A. Miller, Melanie L. Clark, Peter R. Wright
2005, Scientific Investigations Report 2004-5113
The National Water-Quality Assessment Program of the U.S. Geological Survey initiated an assessment in 1997 of the quality of water resources in the Yellowstone River Basin. Water-quality samples regularly were collected during 1999-2001 at 10 fixed sites on streams representing the major environmental settings of the basin. Integrator sites, which...
Comparison of mine waste assessment methods at the Rattler mine site, Virginia Canyon, Colorado
Phil L. Hageman, Kathleen S. Smith, Thomas R. Wildeman, James F. Ranville
2005, Conference Paper, Proceedings of the 2005 National Meeting of the American Society of Mining and Reclamation
In a joint project, the mine waste-piles at the Rattler Mine near Idaho Springs, Colorado, were sampled and analyzed by scientists from the U.S. Geological Survey (USGS) and the Colorado School of Mines (CSM). Separate sample collection, sample leaching, and leachate analyses were performed by both groups and the results...
Use of the Biotic Ligand Model to predict metal toxicity to aquatic biota in areas of differing geology
Kathleen S. Smith
2005, Conference Paper, Proceedings of the 2005 National Meeting of the American Society of Mining and Reclamation
This work evaluates the use of the biotic ligand model (BLM), an aquatic toxicity model, to predict toxic effects of metals on aquatic biota in areas underlain by different rock types. The chemical composition of water, soil, and sediment is largely derived from the composition of the underlying rock. Geologic...
Using enzyme bioassays as a rapid screen for metal toxicity
LaDonna M. Choate, P.E. Ross, E. P. Blumenstein, James F. Ranville
2005, Conference Paper, Proceedings of the 2005 National Meeting of the American Society of Mining and Reclamation
Mine tailings piles and abandoned mine soils are often contaminated by a suite of toxic metals, which were released in the mining process. Traditionally, toxicity of such areas has been determined by numerous chemical methods including the Toxicity Characteristic Leachate Procedure (TCLP) and traditional toxicity tests using organisms such as...
Reconnaissance of the Hydrogeology of Ta'u, American Samoa
Scot K. Izuka
2005, Scientific Investigations Report 2004-5240
Analysis of existing data and information collected on a reconnaissance field visit supports a conceptual model of ground-water occurrence in Ta'u, American Samoa, in which a thin freshwater lens exists in a predominantly high-permeability aquifer that receives high rates of recharge. Because the freshwater lens is thin throughout most of...
Comparison of preconstruction and 2003 bathymetric and topographic surveys of Lake McConaughy, Nebraska
Wade H. Kress, Sonja K. Sebree, Gregory R. Littin, Michael A. Drain, Michael E. Kling
2005, Scientific Investigations Report 2005-5040
The U.S. Geological Survey, in cooperation with The Central Nebraska Public Power and Irrigation District, conducted a study that used bathymetric and topographic surveying in conjunction with Geographical Information Systems techniques to determine the 2003 physical shape, current storage capacity, and the changes in storage capacity of Lake McConaughy that...
Conclusion
Michael Lannoo, Alisa L. Gallant, Priya Nanjappa, L. Blackburn, R. Hendricks
Michael Lannoo, editor(s)
2005, Book chapter, Amphibian declines: The conservation status of United States species
This book has presented what is known about the extent and causes of amphibian population declines in the United States and what can be done about them. It has also examined life history and natural history features needed to manage for amphibians, with a current assessment of their distribution. In...
A model for simulation of surface-water integrated flow and transport in two dimensions: user's guide for application to coastal wetlands
Eric D. Swain
2005, Open-File Report 2005-1033
The computation of hydrodynamic flow in two dimensions is implemented in the Surface-Water Integrated Flow and Transport in Two-Dimensions (SWIFT2D) model using a numerical code that also includes computation of reactive constituent transport, density variation effects, drying and wetting of periodically inundated areas, and hydraulic structures. The model can be...
Gulf of Mexico Integrated Science - Tampa Bay Study: Watershed and Estuary Mapping
Mark Hansen
2005, Open-File Report 2005-1014
Tampa Bay, Florida, and its environs have experienced phenomenal urban growth and significant changes in land-use practices over the past 50 years. This trend is expected to continue, with human activity intensifying and affecting a wider geographic region. Urbanization creates impervious surfaces, which increase stormwater runoff and contribute to greater...
