Hydrogeology and water quality of the Mississippi River alluvium near Muscatine, Iowa, June 1992 through June 1994
K.J. Lucey, R.L. Kuzniar, J.P. Caldwell
1995, Water-Resources Investigations Report 95-4049
A study of the Mississippi River alluvium near Muscatine, Iowa, was conducted to evaluate ground-water flow and water quality using data collected from June 1992 through June 1994. The study area included approximately 80 square miles in parts of Muscatine and Louisa Counties in Iowa and Rock Island and Mercer...
Computation of bedrock-aquifer recharge in northern Westchester County, New York, and chemical quality of water from selected bedrock wells
Stephen W. Wolcott, Robert F. Snow
1995, Water-Resources Investigations Report 92-4157
An empirical technique was used to calculate the recharge to bedrock aquifers in northern Westchester County. This method requires delineation of ground-water divides within the aquifer area and values for (1) the extent of till and exposed bedrock within the aquifer area, and (2) mean annual runoff. This report contains...
Effects of selective forest clearing fertilization, and liming on the hydrology and water quality of a small tributary to the Quabbin Reservoir, central Massachusetts
J. B. Shanley, J. L. Strause, J. C. Risley
1995, Water-Resources Investigations Report 95-4124
Effects of selective forest clearing on water yield and water quality were investigated in a 308-hectare basin that drains to Quabbin Reservoir Watershed in central Massachusetts. The experimental basin and a nearby 280-hectare control basin were studied together for comparison. Streamflow was measured continuously and water-quality samples were collected biweekly...
Ground-water flow and water quality in the sand aquifer of Long Beach Peninsula, Washington
Blakemore E. Thomas
1995, Water-Resources Investigations Report 95-4026
This report describes an investigation of ground-water flow and water quality in the sand aquifer of the Long Beach Peninsula. The peninsula is located in the southwestern corner of the State of Washington, is about 27 miles long, and has an average width of about 1.5 miles. It is surrounded...
Arsenic loads in Spearfish Creek, western South Dakota, water years 1989-91
Daniel G. Driscoll, Timothy S. Hayes
1995, Water-Resources Investigations Report 95-4080
Numerous small tributaries on the eastern flank of Spearfish Creek originate within a mineralized area with a long history of gold-mining activity. Some streams draining this area are known to have elevated concentrations of arsenic. One such tributary is Annie Creek, where arsenic concentrations regularly approach the Maximum Contaminant Level...
Water-quality and hydrologic conditions at a site of ground-water contamination by volatile organic compounds, South Grafton, Massachusetts, September and October 1994
L.A. DiSimone, P. M. Barlow
1995, Open-File Report 95-425
Ground-water quality and hydrologic data were collected at a site contaminated by volatile organic compounds (VOCs) in South Grafton, Massachusetts, during September and October 1994. The VOCs have formed a plume of contaminated ground water at an abandoned textile mill adjacent to the Blackstone River. Concentrations of total VOCs in...
Monte Carlo simulation of peak-acceleration attenuation using a finite-fault uniform-patch model; a parameter study
A. M. Rogers, D. M. Perkins
1995, Open-File Report 95-5
Simulation of the water-table altitude in the Biscayne Aquifer, southern Dade County, Florida, water years 1945-89
M. L. Merritt
1995, Open-File Report 95-337
A digital model of the flow system in the highly permeable surficial aquifer of southern Dade County, Florida, was constructed for the purposes of better understanding processes that influence the flow system and of supporting the construction of a subregional model of the transport of brackish water from a flowing...
Documentation of AIR3D, an adaptation of the ground-water-flow code MODFLOW to simulate three-dimensional air flow in the unsaturated zone
C.J. Joss, A. L. Baehr
1995, Open-File Report 94-533
No abstract available....
Descriptive, grade, and tonnage models for molybdenum-tungsten greisen deposits
B. B. Kotlyar, S. D. Ludington, D.L. Mosier
1995, Open-File Report 95-584
Ground-water flow and the possible effects of remedial actions at J-Field, Aberdeen Proving Ground, Maryland
W.B. Hughes
1995, Water-Resources Investigations Report 95-4075
J-Field, located in the Edgewood Area of Aberdeen Proving Ground, Md, has been used since World War II to test and dispose of explosives, chemical warfare agents, and industrial chemicals resulting in ground-water, surface-water, and soil contami- nation. The U.S. Geological Survey finite-difference model was used to better understand ground-water...
Broadband seismology and small regional seismic networks
Robert B. Herrmann
1995, Professional Paper 1538-S
In the winter of 1811-12, three of the largest historic earthquakes in the United States occurred near New Madrid, Missouri. Seismicity continues to the present day throughout a tightly clustered pattern of epicenters centered on the bootheel of Missouri, including parts of northeastern Arkansas, northwestern Tennessee, western Kentucky, and southern...
Map of Mars showing channels and possible paleolake basins
D. H. Scott, J. M. Dohm, J. W. Rice Jr.
1995, IMAP 2461
The significance of water in the geologic evolution of Mars was strikingly revealed by Mariner and Viking spacecraft images. Theoretical and conceptual models of the Martian climate through time range from a brief, early, warm, and wet period followed by protracted desertification to episodic oceans that inundated the northern lowland...
Deposition and simulation of sediment transport in the Lower Susquehanna River reservoir system
R.A. Hainly, L.A. Reed, H.N. Flippo Jr., G. J. Barton
1995, Water-Resources Investigations Report 95-4122
The Susquehanna River drains 27,510 square miles in New York, Pennsylvania, and Maryland and is the largest tributary to the Chesapeake Bay. Three large hydroelectric dams are located on the river, Safe Harbor (Lake Clarke) and Holtwood (Lake Aldred) in southern Pennsylvania, and Conowingo (Conowingo Reservoir) in northern Maryland. About...
Monthly average polar sea-ice concentration
Peter N. Schweitzer
1995, Data Series 27
The data contained in this CD-ROM depict monthly averages of sea-ice concentration in the modern polar oceans. These averages were derived from the Scanning Multichannel Microwave Radiometer (SMMR) and Special Sensor Microwave/Imager (SSM/I) instruments aboard satellites of the U.S. Air Force Defense Meteorological Satellite Program from 1978 through 1992. The...
Evaluation of 11 equations for determining evaporation for a small lake in the North Central United States
Thomas C. Winter, Donald O. Rosenberry, A.M. Sturrock
1995, Water Resources Research (31) 983-993
Eleven equations for calculating evaporation were compared with evaporation determined by the energy budget method for Williams Lake, Minnesota. Data were obtained from instruments on a raft, on land near the lake, and at a weather station 60 km south of the lake. The comparisons were based on monthly values...
Diagnostic modeling of trace metal partitioning in south San Francisco Bay
T. W. Wood, A. M. Baptista, J.S. Kuwabara, A.R. Flegal
1995, Limnology and Oceanography (40) 345-358
The two-dimensional numerical model ELAmet was used to investigate the effect of adsorption kinetics on the apparent distribution coefficients of Cu, Cd, and Zn in south San Francisco Bay, California. The numerical experiments were designed to determine whether adsorption kinetics can control the basin-scale variability of the observed partitioning and...
Seasonal-to-interannual fluctuations in surface temperature over the Pacific: effects of monthly winds and heat fluxes
Daniel R. Cayan, Arthur J. Miller, Tim P. Barnett, Nicholas E. Graham, Jack N. Ritchie, Josef M. Oberhuber
1995, Book chapter, Natural climate variability on decade-to-century time scales
Monthly heat fluxes and wind stresses are used to force the Oberhuber isopycnic ocean general-circulation (OPYC) model of the Pacific basin over a two-decade period from 1970 to 1988. The surface forcings are constructed from COADS marine observations via bulk formulae. Monthly anomalies of the fluxes and stresses are...
Hydrological and thermal response of lakes to climate: Description and modeling
Steven W. Hostetler
1995, Book chapter, Physics and chemistry of lakes
Lake systems continually respond to climatic conditions that vary over broad scales of space and time. The spatial distribution of lakes on the Earth’s surface is indicative of long-term patterns of atmospheric circulation, and the annual cycle of climate over lake basins is reflected in seasonal change in the size...
Modeling mangrove canopy reflectance using a light interaction model and an optimization technique
Elijah Ramsey III, John R. Jensen
1995, Book chapter, Wetland and Environmental Applications of GIS
At 20 sites, incorporating mixtures of black, red, and white mangroves, canopy reflectance spectra were derived from high resolution spectral data taken from a helicopter platform. Canopy characteristics were predicted from the canopy reflectance spectra by using measured and estimated data as inputs into a light-canopy interaction model within a...
Structure, vein paragenesis, and alteration in the Al Wajh gold district, Saudi Arabia
P. James LeAnderson, Mahmoud Yoldash, Peter R. Johnson, Terry W. Offield
1995, Economic Geology (90) 2262-2273
The Al Wajh gold district contains small deposits of gold-bearing quartz veins located in sheared and altered Neoproterozoic mafic lavas and volcaniclastic sandstone and siltstone. The veins formed during multiple episodes of deformation and have structual and mineralogic features characteristic of mesothermal, low sulfide, gold-bearing quartz veins. Three early deformation...
Geometry of sandy deposits at the distal edge of the Mississippi Fan, Gulf of Mexico
D.C. Twichell, W. C. Schwab, Neil H. Kenyon
1995, Book chapter, Atlas of Deep Water Environments
Sidescan sonar provides a map of the seafloor that has greatly improved the understanding of depositional processes on modern deep-sea fans (e.g. Mutti and Normark 1991). Here, we present a sidescan-sonar mosaic from the eastern Gulf of Mexico that images the distal reaches of a channel on the Mississippi Fan...
The generation of oceanic rhyolites by crystal fractionation: the basalt-rhyolite association at Volcán Alcedo, Galápagos archipelago
Dennis Geist, Keith A. Howard, Peter Larson
1995, Journal of Petrology (36) 965-982
Alcedo volcano is one of six shield volcanoes on Isabela Island in the western Galápagos Islands. Although Alcedo is dominantiy basaltic, it is unusual in that it also has erupted ∼1 km3 of rhyolite. The rhyolitic phase marked a 10-fold decrease in the mass-eruption rate of the volcano, and the volcano...
Continental drilling for paleoclimatic records: Recommendations from an international workshop
Steve M. Colman, editor(s)
1995, Report
The Workshop, entitled "Continental Drilling for Paleoclimate Records", was sponsored by the Past Global Changes (PAGES) Project, a core project of the International Geosphere-Biosphere Programme (IGBP) and by the GeoForschungsZentrum, Potsdam, Germany, in conjunction with the International Continental Drilling Programme (ICDP). The impetus for the meeting was the need for...
Relations between benthic community structure and metals concentrations in aquatic macroinvertebrates: Clark Fork River, Montana
1995, Journal of Freshwater Ecology (10) 277-293
We sampled macroinvertebrate communities at six sites on the upper Clark Fork River, Montana, to determine relations between macroinvertebrate community structure and metals in invertebrates and the best benthic community metrics to use for ranking sites based on the relative severity of the effects of metals. Concentrations (μg/g) of six...
