Tau Rho Alpha, John P. Galloway, Mark V. Bonito
1995, Open-File Report 95-573
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Publication Extents
Not all publications have extents, not all extents are completely accuratePaul Von Guerard, W. B. Weiss
1995, Water-Resources Investigations Report 94-4194
The U.S. Environmental Protection Agency requires that municipalities that have a population of 100,000 or greater obtain National Pollutant Discharge Elimination System permits to characterize the quality of their storm runoff. In 1992, the U.S. Geological Survey, in cooperation with the Colorado Springs City Engineering Division, began a study to...
G. L. Turney, S. C. Kahle, N. P. Dion
1995, Water-Resources Investigations Report 94-4082
East King County is a 250-square-mile area east of Seattle underlain by as much as 1,200 feet of unconsolidated deposits of glacial and nonglacial origin. A surficial geology map and 12 geohydrologic sections were constructed and used to delineate 10 geohydrologic units, 4 of which are major aquifers. Annual precipitation...
K. J. Breen, A.L. Kontis, G.L. Rowe, R.J. Haefner
1995, Water-Resources Investigations Report 94-4131
The stratified-drift aquifer in the 3,000-ft (feet)-wide and 100-ft-deep buried valley of Killbuck Creek near Wooster in northeastern Ohio was studied. The stratified drift with adjacent sandstone and shale bedrock produce a system of ground-water flow representative of the western part of the glaciated north-eastern United States. The stratified-drift aquifer...
Lisa Bratton, Gene W. Parker
1995, Water-Resources Investigations Report 94-4256
The U.S. Geological Survey, in cooperation with the Massachusetts Department of Environmental Management, Office of Water Resources, studied the Concord River Basin to estimate the volume of water that is available from stratified-drift aquifers. A combined hydrograph-separation and streamflow- duration-curve analysis indicates that 20.8 million cubic feet of water can...
William S. Parks, June E. Mirecki, James A. Kingsbury
1995, Water-Resources Investigations Report 94-4212
An investigation was conducted by the U.S. Geological Survey from 1992 to 1994 to collect and interpret hydrogeologic and water-quality data to determine the source of ground water causing water-quality changes in water from wells screened in the Memphis aquifer in the Davis well field at Memphis, Tennessee. Water-quality changes...
W.G. Stein, G. B. Ozuna
1995, Water-Resources Investigations Report 95-4030
In Bexar County, residential and commercial development on the Edwards aquifer recharge zone is increasing. The aquifer possibly can be contaminated by spills, leakage of hazardous materials, or runoff from the rapidly developing urban areas that surround, or are built on, the intensely faulted and fractured, karstic limestone outcrops characteristic...
D. J. Ackerman
1995, Water-Resources Investigations Report 94-4257
Quantitative estimates of ground-water flow directions and traveltimes for advective flow were developed for the regional aquifer system of the eastern Snake River Plain, Idaho. The work included: (1) descriptions of compartments in the aquifer that function as intermediate and regional flow systems, (2) descriptions of pathlines for flow originating...
Yansen Wang, David R. Miller, Dean E. Anderson, Michael L. McManus
1995, Agricultural and Forest Meteorology (76) 277-291
An aerial spray droplets' transport model has been developed by applying recent advances in Lagrangian stochastic simulation of heavy particles. A two-dimensional Lagrangian stochastic model was adopted to simulate the spray droplet dispersion in atmospheric turbulence by adjusting the Lagrangian integral time scale along the drop trajectory. The other major...
Maryann Wasiolek
1995, Water-Resources Investigations Report 94-4072
Water budgets developed for basins of five streams draining the western side of the Sangre de Cristo Mountains in northern New Mexico indicate that subsurface inflow along the mountain front is recharging the Tesuque aquifer system of the Espanola Basin. Approximately 14,700 acre-feet of water per year, or 12.7 percent...
C. J. Potter, M. B. Goldhaber, P.C. Heigold, James A. Drahovzal
1995, Professional Paper 1538-Q
In the winter of 1811-12, three of the largest historic earthquakes in the United States occurred near New Madrid, Mo. 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...
Arlen W. Harbaugh
1995, Open-File Report 95-288
J.L. Robinson
1995, Water-Resources Investigations Report 93-4171
Wellhead-protection strategies were evaluated for the Upper Floridan aquifer of west-central Florida using the old Tampa well field in northeastern Hillsborough County, Florida, as a test site. The upper 400 feet of the Upper Floridan aquifer responded to pumping as an equivalent, porous medium for a range of discharge rates...
Ramon Aravena, Leonard I Wassenaar, Niel Plummer
1995, Water Resources Research (31) 2307-2317
This paper addresses the problem of 14C age dating of groundwaters in a confined regional aquifer affected by methanogenesis. Increasing CH4 concentrations along the groundwater flow system and 13C and 14C isotopic data for dissolved inorganic carbon, dissolved organic carbon, and CH4 clearly show the effect of methanogenesis on groundwater chemistry. Inverse reaction path modeling...
Glenn A. Waychunas, James A. Davis, Christopher C. Fuller
1995, Geochimica et Cosmochimica Acta (59) 3655-3661
Manceau's (1995) reinterpretation of some of our EXAFS results (Waychunas et al., 1993) has been analyzed using both old and newly collected data in an attempt to clarify the nature of proposed monodentate and edge-sharing bidentate arsenate complexes on the ferrihydrite surface. It is shown that EXAFS analysis utilizing data...
Timothy R. Green, David L. Freyberg
1995, Water Resources Research (31) 2201-2211
Anisotropy in large-scale unsaturated hydraulic conductivity of layered soils changes with the moisture state. Here, state-dependent anisotropy is computed under conditions of large-scale gravity drainage. Soils represented by Gardner's exponential function are perfectly stratified, periodic, and inclined. Analytical integration of Darcy’s law across each layer results in a system of...
E. W. Strom, M. J. Mallory
1995, Water-Resources Investigations Report 94-4223
The Eutaw-McShan aquifer and Tuscaloosa aquifer system in northeastern Mississippi were investi- gated to better understand the hydrogeology and the ground-water flow in and between the aquifers. A numerical model was developed to simulate ground- water flow for prepumping and pumping conditions, and model simulatons projected the possible effects of...
Betty M. Miller
1995, Bulletin 2118
R.S. Sonenshein
1995, Water-Resources Investigations Report 94-4167
A hydrogeologic approach that integrates the use of hydrogeologic and spatial tools aids in the identification of land uses that overlie ground- water flow paths and permits a better understanding of ground-water flow systems. A mathematical model was used to simulate the ground-water flow system in Broward County, particle-tracking software...
K. J. Halford, N. L. Barber
1995, Water-Resources Investigations Report 94-4219
The upper, middle, and lower Catahoula aquifers in the vicinity of the cites of Laurel and Hattiesburg in southern Mississippi are made up of irregular, discontinuous sand zones in the Catahoula Formation of Miocene age. In places thee three aquifers may be hydraulically well connected, and are referred to as...
Alan H. Welch, Zoltan Szabo, David L. Parkhurst, Peter C. Van Metre, Ann H. Mullin
1995, Applied Geochemistry (10) 491-503
Gross-beta activity has been used as an indicator of beta-emitting isotopes in water since at least the early 1950s. Originally designed for detection of radioactive releases from nuclear facilities and weapons tests, analysis of gross-beta activity is widely used in studies of naturally occurring radioactivity in ground water. Analyses of...
P.M. Schulmeyer
1995, Water-Resources Investigations Report 94-4211
The Surface Water Treatment Rule under the 1986 Amendment to the Safe Drinking Water Act requires that public-water supplies be evaluated for susceptibility to surface-water effects. The alluvial aquifer adjacent to the Cedar River is evaluated for biogenic material and monitored for selected water-quality properties and constituents to determine the...
P. T. Harte, William Johnson
1995, Water-Resources Investigations Report 92-4154
Stratified-drift aquifers discontinuously underlie 121 mi2 (square miles) of the Contoocook River Basin, which has a total drainage area of 776 mi2. Maps of these aquifers, showing water-table configurations, saturated thicknesses, and transmissivities were prepared from well and test-hole data and seismic-refraction profiles. The distribution of stratified-drift aquifers is largely...
M. E. Gettings, Brenda B. Houser
1995, Open-File Report 95-76
Y. Takauchi, John R. Evans
1995, Geophysical Research Letters (22) 2203-2206
From teleseismic travel times we derive three-dimensional velocity models of the upper 71 km in the 1989 Loma Prieta earthquake region, central California. Shallow crustal structure is consistent with local-earthquake tomography. Horizontal velocity gradients at all depths suggest that the San Andreas fault was a deep shear locus, at least...