Geologic Map of the Thaumasia Region, Mars
Janes M. Dohm, Kenneth L. Tanaka, Trent M. Hare
2001, IMAP 2650
The geology of the Thaumasia region (fig. 1, sheet 3) includes a wide array of rock materials, depositional and erosional landforms, and tectonic structures. The region is dominated by the Thaumasia plateau, which includes central high lava plains ringed by highly deformed highlands; the plateau may comprise the ancestral center...
Droughts, epic droughts and droughty centuries - lessons from a California paleoclimatic record: a PACLIM 2001 meeting report
M. D. Dettinger
2001, Interagency Ecological Program Newsletter (14) 51-53
During the early 1990s (but echoing studies by S.T. Harding at the University of California, from as early as the 1930s), several lines of paleoclimate evidence in and around the Sierra Nevada Range have provided the water community in California with some real horror stories. By studying ancient tree stumps...
Hydrogeology and ground-water flow in the Memphis and Fort Pillow aquifers in the Memphis area, Tennessee
J. V. Brahana, R. E. Broshears
2001, Water-Resources Investigations Report 89-4131
On the basis of known hydrogeology of the Memphis and Fort Pillow aquifers in the Memphis area, a three-layer, finite-difference numerical model was constructed and calibrated as the primary tool to refine understanding of flow in the aquifers. The model was calibrated and tested for accuracy in simulating measured heads...
Hydrologic and water-quality characterization and modeling of the Chenoweth Run basin, Jefferson County, Kentucky
Gary R. Martin, Phillip J. Zarriello, Allison A. Shipp
2001, Water-Resources Investigations Report 2000-4239
No abstract available....
Analytical versus numerical estimates of water-level declines caused by pumping, and a case study of the Iao Aquifer, Maui, Hawaii
Delwyn S. Oki, William Meyer
2001, Water-Resources Investigations Report 2000-4244
Comparisons were made between model-calculated water levels from a one-dimensional analytical model referred to as RAM (Robust Analytical Model) and those from numerical ground-water flow models using a sharp-interface model code. RAM incorporates the horizontal-flow assumption and the Ghyben-Herzberg relation to represent flow in a one-dimensional unconfined aquifer that contains...
Source identification and fish exposure for polychlorinated biphenyls using congener analysis from passive water samplers in the Millers River basin, Massachusetts
John A. Colman
2001, Water-Resources Investigations Report 2000-4250
Measurements of elevated concentrations of polychlorinated biphenyls (PCBs) in fish and in streambed sediments of the Millers River Basin, Massachusetts and New Hampshire, have been reported without evidence of the PCB source. In 1999, an investigation was initiated to determine the source(s) of the elevated PCB concentrations observed in fish...
Simulation of flow in the upper North Coast Limestone Aquifer, Manati-Vega Baja area, Puerto Rico
Gregory S. Cherry
2001, Water-Resources Investigations Report 2000-4266
A two-dimensional computer ground-water model was constructed of the Manati-Vega Baja area to improve the understanding of the unconfined upper aquifer within the North Coast Province of Puerto Rico. The modeled area covers approximately 79 square miles within the municipios of Manati and Vega Baja and small portions of Vega...
Pond-aquifer interaction at South Pond of Lake Cochituate, Natick, Massachusetts
Paul J. Friesz, Peter E. Church
2001, Water-Resources Investigations Report 2001-4040
A U.S. Army facility on a peninsula in South Pond of Lake Cochituate was designated a Superfund site by the U.S. Environmental Protection Agency in 1994 because contaminated ground water was detected at the facility, which is near the Natick Springvale public-supply wellfield. The interaction between South Pond and the...
Geologic map of the Pandrosos Dorsa Quadrangle (V-5), Venus
Elizabeth Rosenberg, George E. McGill
2001, IMAP 2721
Introduction The Magellan spacecraft orbited Venus from August 10, 1990, until it plunged into the Venusian atmosphere on October 12, 1994. Magellan had the objectives of (1) improving knowledge of the geologic processes, surface properties, and geologic history of Venus by analysis of surface radar characteristics, topography, and morphology and (2)...
Salt-front movement in the Hudson River estuary, New York — Simulations by one-dimensional flow and solute-transport models
M. Peter de Vries, Lawrence A. Weiss
2001, Water-Resources Investigations Report 99-4024
The Hudson River is being considered for use as a supplemental source of water supply for New York City during droughts. One proposal entails withdrawal of Hudson River water from locations near Newburgh, Chelsea, or Kingston, but the extent to which this could cause the salt front to advance upstream...
Analysis of borehole-radar reflection logs from selected HC boreholes at the Project Shoal area, Churchill County, Nevada
J.W. Lane Jr., P. K. Joesten, G.M. Pohll, Todd Mihevic
2001, Water-Resources Investigations Report 2001-4014
Single-hole borehole-radar reflection logs were collected and interpreted in support of a study to characterize ground-water flow and transport at the Project Shoal Area (PSA) in Churchill County, Nevada. Radar logging was conducted in six boreholes using 60-MHz omni-directional electric-dipole antennas and a 60-MHz magnetic-dipole directional receiving antenna.Radar data from...
Petroleum geology and resources of the North Ustyurt Basin, Kazakhstan and Uzbekistan
Gregory F. Ulmishek
2001, Bulletin 2201-D
The triangular-shaped North Ustyurt basin is located between the Caspian Sea and the Aral Lake in Kazakhstan and Uzbekistan and extends offshore both on the west and east. Along all its sides, the basin is bounded by the late Paleozoic and Triassic foldbelts that are partially overlain by Jurassic and...
Summary of and factors affecting pesticide concentrations in streams and shallow wells of the lower Susquehanna River basin, Pennsylvania and Maryland, 1993-95
Robert A. Hainly, Tammy M. Zimmerman, Connie A. Loper, Bruce D. Lindsey
2001, Water-Resources Investigations Report 2001-4012
This report presents the detection frequency of 83 analyzed pesticides, describes the concentrations of those pesticides measured in water from streams and shallow wells, and presents conceptual models of the major factors affecting seasonal and areal patterns of pesticide concentrations in water from streams and shallow wells in the Lower...
Historical trends and concentrations of fecal coliform bacteria in the Brandywine Creek basin, Chester County, Pennsylvania
D.A. Town
2001, Water-Resources Investigations Report 2001-4026
The Brandywine Creek in Chester County is used for recreation and as an important source of drinking water. For this study, 40 sites were established for collection of water samples for analysis of fecal coliform and Escherichia coli bacteria in 1998-99. Samples were collected during base-flow conditions and during five...
Influence of stream habitat and land use on benthic macroinvertebrate indicators of stream quality of selected above-tidal streams in the Houston-Galveston Area Council service area, Texas, 1997–98
J. Bruce Moring
2001, Water-Resources Investigations Report 2001-4010
During 1997–98, the U.S. Geological Survey, in cooperation with the Houston-Galveston Area Council, collected stream-habitat and benthic macroinvertebrate data for 31 reaches on abovetidal streams in the Council service area near Houston, Texas. Stream-habitat, land-use and population, and benthic aquatic insect metrics were determined for the 31 reaches. Statistical analyses...
A spatially referenced regression model (SPARROW) for suspended sediment in streams of the Conterminous U.S.
Gregory E. Schwarz, Richard A. Smith, Richard B. Alexander, John R. Gray
2001, Conference Paper, Proceedings of the Seventh Federal Interagency Sedimentation Conference, March 25 to 29, 2001, Reno, Nevada
Suspended sediment has long been recognized as an important contaminant affecting water resources. Besides its direct role in determining water clarity, bridge scour and reservoir storage, sediment serves as a vehicle for the transport of many binding contaminants, including nutrients, trace metals, semi-volatile organic compounds, a nd numerous pesticides (U.S....
Mountain Island Lake, North Carolina: Analysis of ambient conditions and simulation of hydrodynamics, constituent transport, and water-quality characteristics, 1996–97
Jerad D. Bales, Kathleen M. Sarver, Mary J. Giorgino
2001, Water-Resources Investigations Report 2001-4138
Mountain Island Lake is an impoundment of the Catawba River in North Carolina and supplies drinking water to more than 600,000 people in Charlotte, Gastonia, Mount Holly, and several other communities. The U.S. Geological Survey, in cooperation with the Charlotte-Mecklenburg Utilities, conducted an investigation of the reservoir to characterize hydrologic...
Importance of the predator's ecological neighborhood in modeling predation on migrating prey
Donald L. DeAngelis, James H. Petersen
2001, Oikos (94) 315-325
Most mathematical descriptions of predator-prey interactions fail to take into account the spatio-temporal structures of the populations, which can lead to errors or misinterpretations. For example, a compact pulse of prey migrating through a field of quasi-stationary predators may not be well described by standard predator-prey models, because the predators...
Summary of trends and status analysis for flow, nutrients, and sediments at selected nontidal sites, Chesapeake Bay basin, 1985-99
M. J. Langland, R. E. Edwards, L.A. Sprague, S.E. Yochum
2001, Open-File Report 2001-73
Water-quality and flow data from 31 sites in nontidal portions of the Chesapeake Bay Basin were analyzed to document annual nutrient and sediment loads and trends for the period 1985 through 1999 as part of an annual reevaluation and reporting for the Chesapeake Bay Program. Annual loads were estimated by...
Estimation of hydraulic parameters from an unconfined aquifer test conducted in a glacial outwash deposit, Cape Cod, Massachusetts
Allen F. Moench, Stephen P. Garabedian, Denis R. LeBlanc
2001, Professional Paper 1629
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...
An estimate of chemical loads from ground water to the Grand Calumet River and Indiana Harbor Canal, northwestern Indiana
Timothy C. Willoughby, Qaadir A. Siddeeq
2001, Water-Resources Investigations Report 2001-4020
Chemical loads from ground water to the Grand Calumet River and the Indiana Harbor Canal in northwestern Indiana were estimated to aid in determining the total maximum daily load. Data from two previous studies, completed in 1987 and 1993, were used to compute loads. The first study included a ground-water-flow...
Ecological characterization of streams, and fish-tissue analysis for mercury and lead at selected locations, Fort Gordon, Georgia, June 1999 to May 2000
M. Brian Gregory, Timothy C. Stamey, John B. Wellborn
2001, Open-File Report 2001-203
The U.S. Geological Survey, in cooperation with the Environmental and Natural Resources Management Office of the U.S. Army Signal Center and Fort Gordon, Ga., documented the ecological condition of selected water-bodies on the Fort Gordon military installation from June 1999 to May 2000. This study includes stream-habitat assessments, aquatic invertebrate...
Hydrogeology, model description, and flow analysis of the Mississippi River alluvial aquifer in northwestern Mississippi
J. K. Arthur
2001, Water-Resources Investigations Report 2001-4035
The Mississippi River alluvial aquifer underlies a 7,000-square-mile area of the Mississippi River alluvial plain in northwestern Mississippi, an area locally known as the Delta. The alluvial aquifer is the most heavily pumped aquifer in Mississippi, and wells yielding more than 2,000 gallons per minute are common. About 98 percent...
A Microsoft Windows version of the MARK3 Monte Carlo resource simulator
Joseph S. Duval
2001, Open-File Report 2000-415
This publication includes a version of the MARK3 Monte Carlo resource simulator that will run under Microsoft Windows 98, NT, and 2000. The disc also includes grade and tonnage information and related deposit model files that allow the user to calculate probability curves for mineral resources. A total of 113...
The Advanced National Seismic System; management and implementation
H.M. Benz, K. M. Shedlock, R.P. Buland
2001, Fact Sheet 045-01
What is the Advanced National Seismic System? The Advanced National Seismic System (ANSS) is designed to organize, modernize, and standardize operations of seismic networks in the United States to improve the Nation’s ability to respond effectively to damaging earthquakes, volcanoes, and tsunamis. To achieve this, the ANSS will link more...
