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Page 4840, results 120976 - 121000

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Selected hydrologic data for northern Utah Valley, Utah, 1935-82
Cynthia L. Appel, David W. Clark, Paul E. Fairbanks
1982, Open-File Report 82-1023
This report contains hydrologic data collected in northern Utah Valley from 1935 to 1982. Northern Utah Valley is approximately the northern half of an alluvial-filled basin partly occupied by Utah Lake in north-central Utah. The report area is bounded by the Wasatch Range on the east, the Lake Mountains on...
Hydrology of the sand-and-gravel aquifer, southern Okaloosa and Walton Counties, northwest Florida
L. R. Hayes, D. E. Barr
1982, Water-Resources Investigations Report 82-4110
The sand-and-gravel aquifer in southern Okaloosa and Walton Counties, northwest Florida, extends from land surface to depth of 50 to 150 feet. Intervening layers of clay generally separate the aquifer into an unconfined surficial zone, composed principally of fine to medium sand, and a lower confined zone, consisting of variable...
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,...
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...
Methodologies for extraction of dissolved inorganic carbon for stable carbon isotope studies: Evaluation and alternatives
Afifa Afifi Hassan
1982, Water-Resources Investigations Report 82-6
The gas evolution and the strontium carbonate precipitation techniques to extract dissolved inorganic carbon (DIC) for stable carbon isotope analysis were investigated. Theoretical considerations, involving thermodynamic calculations and computer simulation pointed out several possible sources of error in delta carbon-13 measurements of the DIC and demonstrated the need for experimental...
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...
Effects of urban development on the aquifers in the Memphis area, Tennessee
D. D. Graham
1982, Water-Resources Investigations Report 82-4024
Ground-water withdrawals from aquifers in the Memphis area average about 190 Mgal/d. Potential problems associated with increases in pumpage and urban development are lowered water levels, contamination of the aquifers, and land subsidence. Long-term water-level declines in the Memphis Sand, the principal artesian aquifer of the area, range from less...