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Algal conditions in the Caloosahatchee River (1975-79), Lake Okeechobee to Franklin Lock, Florida
Benjamin F. McPherson, Henry R. La Rose
1982, Water-Resources Investigations Report 81-81
Maximum numbers of suspended algae occurred in late spring and early summer, in each of the years 1975-79, in the Caloosahatchee River. Numbers exceeded 100,000 cells per milliliter at all stations sometime during the study. Concentrations decreased during late summer and autumn and were low during winter, except in January...
A three-dimensional ground-water-flow model modified to reduce computer-memory requirements and better simulate confining-bed and aquifer pinchouts
P.P. Leahy
1982, Water-Resources Investigations Report 82-4023
The Trescott computer program for modeling groundwater flow in three dimensions has been modified to (1) treat aquifer and confining bed pinchouts more realistically and (2) reduce the computer memory requirements needed for the input data. Using the original program, simulation of aquifer systems with nonrectangular external boundaries may result...
Evaluation of a predictive ground-water solute-transport model at the Idaho National Engineering Laboratory, Idaho
Barney D. Lewis, Flora J. Goldstein
1982, Water-Resources Investigations Report 82-25
Aqueous chemical and radioactive wastes discharged to shallow ponds and to shallow or deep wells on the Idaho National Engineering Laboratory (INEL) since 1952 have affected the quality of the ground water in the underlying Snake River Plain aquifer. The aqueous wastes have created large and laterally dispersed concentration plumes...
Small-stream flood investigations in Minnesota, October 1958 to September 1980
Kurt T. Gunard, C.J. Smith
1982, Open-File Report 82-433
An investigation of flood flows from small drainage basins in Minnesota is being made to aid in the design of bridges, culverts and other highway drainage structures. Results of the investigation provide peak-flow data on streams generally with drainage areas less than 200 square miles, placing particular emphasis on those...
Water resources of Borrego Valley and vicinity, California: Phase 1— Definition of geologic and hydrologic characteristics of the basin
W. R. Moyle
1982, Open-File Report 82-855
This report is phase 1 of a 3-phase study and includes information needed to build a digital hydrologic model of Borrego Valley. It includes sources and amounts of recharge water to the basin, areas of water withdrawal, total ground water in storage at steady-state conditions (1945), net ground-water depletion, grid...
Delineation and hydrologic effects of a gasoline leak at Stovepipe Wells Hotel, Death Valley National Monument, California
A. Buono, Elaine M. Packard
1982, Water-Resources Investigations Report 82-45
Ground water is the only local source of water available to the Stovepipe Wells Hotel facilities of the Death Valley National Monument, California. A leak in a service station storage tank caused the formation of a gasoline layer overlying the water table, creating the potential for contamination of the water...
Automation of an ion chromatograph for precipitation analysis with computerized data reduction
Arthur G. Hedley, Marvin J. Fishman
1982, Water-Resources Investigations Report 81-78
Interconnection of an ion chromatograph, an autosampler, and a computing integrator to form an analytical system for simultaneous determination of fluoride, chloride, orthophosphate, bromide, nitrate, and sulfate in precipitation samples is described. Computer programs provided with the integrator are modified to implement ionchromatographic data reduction and data storage. The liquid-flow...
Method for estimating historical irrigation requirements from ground water in the High Plains in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming
Frederick J. Heimes, Richard R. Luckey
1982, Water-Resources Investigations Report 82-40
Historical information on ground-water pumpage for irrigation is required for use with a computer model of the High Plains aquifer. Available historical data on ground-water pumpage in the High Plains were inadequate for use with the computer model. Consequently, a method was developed to estimate historical pumpage data.Two principal components...
Magnitude and frequency of floods in eastern Oregon
D.D. Harris, L.E. Hubbard
1982, Water-Resources Investigations Report 82-4078
A method for estimating the magnitude and frequency of floods is presented for unregulated streams in eastern Oregon. Equations relating flood magnitude to basin characteristics were developed for exceedance probabilities of 0.5 to 0.01 (2- to 100-year recurrence intervals). Separate equations are presented for four regions: Southeast, Northeast, North Central,...
A plan for hydrologic investigations of in situ, oil-shale retorting near Rock Springs, Wyoming
Kent C. Glover, E. A. Zimmerman, L. R. Larson, J.C. Wallace
1982, Open-File Report 82-758
The recovery of shale oil by the in-situ retort process may cause hydrologic impacts, the most significant being ground-water contamination and possible transport of contaminants into surrounding areas. Although these impacts are site-specific, many of the techniques used to investigate each retort operation commonly will be the same. The U.S....