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Page 4917, results 122901 - 122925

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Bibliography of borehole geophysics as applied to ground-water hydrology
Ticie A. Taylor, Joyce A. Dey
1985, Circular 926
Most of the references on borehole geophysics that are relevant to ground-water hydrology are contained in this bibliography, but it does not include every reference that is available under each subject heading; the literature is much too extensive to compile a complete listing. Some of the references may appear under...
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...
Acoustic velocity meter systems
Antonius Laenen
1985, Techniques of Water-Resources Investigations 03-A17
Acoustic velocity meter (AVM) systems operate on the principles that the point-to-point upstream traveltime of an acoustic pulse is longer than the downstream traveltime and that this difference in traveltime can be accurately measured by electronic devices. An AVM system is capable of recording water velocity (and discharge) under a...
Statistical evaluation of the effects of irrigation on chemical quality of ground water and base flow in three river valleys in north-central Kansas
T.B. Spruill
1985, Water-Resources Investigations Report 85-4156
The chemical quality of groundwater and base flow in three alluvial valleys in Kansas has been changed as a result of 10 or more years of irrigation. Sulfate concentrations in groundwater in the Prairie Dog Creek valley statistically larger during 1981-82 than before irrigation began. Concentrations of calcium, bicarbonate, sulfate,...
Measurement of discharge using tracers
F. A. Kilpatrick, Ernest D. Cobb
1985, Techniques of Water-Resources Investigations 03-A16
The development of fluorescent dyes and fluorometers that can measure these dyes at very low concentrations has made dye-dilution methods practical for measuring discharge. These methods are particularly useful for determining discharge under certain flow conditions that are unfavorable for current meter measurements. These include small streams, canals, and pipes...
A computer program for analyzing channel geometry
R.S. Regan, R.W. Schaffranek
1985, Water-Resources Investigations Report 85-4335
The Channel Geometry Analysis Program (CGAP) provides the capability to process, analyze, and format cross-sectional data for input to flow/transport simulation models or other computational programs. CGAP allows for a variety of cross-sectional data input formats through use of variable format specification. The program accepts data from various computer media...
Effects of artificial recharge on the Ogallala aquifer, Texas
Richmond Flint Brown, W.S. Keys
1985, Water Supply Paper 2251
Four recharge tests were conducted by injecting water from playa lakes through wells into the Ogallala Formation. Injection was by gravity flow and by pumping under pressure. At one site, 34-acre feet of water was injected by gravity and produced a significant increase in yield of the well. At a...
Hydrology of major estuaries and sounds of North Carolina
G. L. Giese, Hugh B. Wilder, Garald G. Parker Jr.
1985, Water Supply Paper 2221
Hydrology-related problems associated with North Carolina 's major estuaries and sounds include contamination of some estuaries with municipal and industrial wastes and drainage from adjacent, intensively farmed areas, and nuisance-level algal blooms. In addition, there is excessive shoaling in some navigation channels, salt-water intrusion into usually fresh estuarine reaches, too...
Ground-water quality and geochemistry of aquifers associated with coal in the Allegheny and Monongahela formations, southeastern Ohio
A. C. Razem, A. C. Sedam
1985, Water-Resources Investigations Report 85-4034
Ground water from aquifers associated with coal beds in the Allegheny and Monongahela Formations in southeastern Ohio is predominantly a calcium magnesium bicarbonate type. Sodium bicarbonate type water is less common. Isolated areas of sodium chloride and calcium sulfate types also are present. The water is predominantly very hard, and...
Streamflow and suspended-sediment discharge from two small watersheds in southwestern Wyoming and northeastern Utah, 1984
L.W. Lenfest Jr., B. H. Ringen
1985, Open-File Report 85-161
Accelerated erosion due to mineral exploration and production in southwestern Wyoming has caused concern that the streams will transport excess sediment in these areas. Two adjacent drainage basins with different levels of development were studied to determine the effects of minerals development on water quality. A high level of minerals...
Effects of sanitary sewers on ground-water levels and streams in Nassau and Suffolk Counties, New York; part 3: Development and application of southern Nassau County model
T. E. Reilly, H. T. Buxton
1985, Water-Resources Investigations Report 83-4210
By 1990, sanitary sewers in Nassau County Sewage Disposal Districts 2 and 3 and Suffolk County Southwest Sewer District will discharge to the ocean 140 cu ft of water per second that would otherwise be returned to the groundwater system through septic tanks and similar systems. To evaluate the effects...