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Page 4535, results 113351 - 113375

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Map showing upper Cenozoic rocks and deposits and Quaternary faults, Rio Grande rift, south-central Colorado
Steven M. Colman, James P. McCalpin, Dean A. Ostenaa, Robert M. Kirkham
1985, IMAP 1594
This map shows the faults and faulted rocks and deposits in the tectonically active part of the Rio Grande rift in Colorado, with particular emphasis on faults and deposits of Quaternary age. The Rio Grande rift in Colorado has been the subject of considerable recent geologic investigation. General compilations of...
Effects of wastewater effluent on the South Platte River from Littleton to Denver
N.E. Spahr, S. R. Blakely
1985, Water-Resources Investigations Report 85-4124
The U.S. Geological Survey 's one-dimensional steady-state water quality model was used to investigate the effects of the effluent from the Bi-City WWTP (Wastewater Treatment Plant) on the South Platte River. The Bi-City WWTP is operated by the Cities of Littleton and Englewood. The model was calibrated from a 14.5...
Controls on ground-water chemistry in the Horse Heaven Hills, south-central Washington
W.C. Steinkampf, Gilbert C. Bortleson, F. A. Packard
1985, Water-Resources Investigations Report 85-4048
Miocene basaltic aquifers are the source of domestic and municipal water, and about 20,000 acre-feet of irrigation water annually, in the Horse Heaven Hills in south-central Washington State. Groundwater chemical variations derive from the hydraulic characteristics is of the geohydrologic system, from groundwater basalt reactions, and from irrigation. Some dissolved...
Geohydrology of the High Plains Aquifer, western Kansas
L.E. Stullken, Kenneth R. Watts, R. J. Lindgren
1985, Water-Resources Investigations Report 85-4198
The High Plains aquifer underlies 174,050 sq mi of eight states (Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming) and contains approximately 3.3 billion acre-ft of water in storage. Saturated thicknesses within the aquifer are as great as 600 ft near the southern border of southwest Kansas....
Effects of surface mining on streamflow, suspended-sediment, and water quality in the Stony Fork drainage basin, Fayette County, Pennsylvania
D.E. Stump, T.M. Mastrilli
1985, Water-Resources Investigations Report 84-4362
A study of the Stony Fork basin in southern Fayette County, Pennsylvania, from 1977 through 1980 determined the impacts of surface coal mining on surface-water quality. Stony Fork was sampled at six sites, during which time the area of surface mines increased from 0.5 to 5.5 percent of the study...
Clay sized fraction and powdered whole-rock X-ray analyses from alluvial basin deposits in central and southern New Mexico
S. K. Anderholm
1985, Open-File Report 85-173
As part of the study of the water quality and geochemistry of Southwest Alluvial Basins (SWAB) in parts of Colorado, New Mexico, and Texas, which is a Regional Aquifer-System Analysis (RASA) program, whole rock x-ray analysis and clay-size fraction mineralogy (x-ray) analysis of selected samples from alluvial basin deposits were...
Simulation of the flow system of Barton Springs and associated Edwards Aquifer in the Austin area, Texas
Raymond M. Slade Jr., Linda Ruiz, Diana Slagle
1985, Water-Resources Investigations Report 85-4299
A digital model of two-dimensional groundwater flow was used to estimate the hydraulic properties of the Edwards Aquifer in a 151 sq mi area near Austin, Texas. The transmissivity, hydraulic conductivity, and specific yield were estimated for the part of the aquifer that discharges at Barton Springs in Austin. The...