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Page 4570, results 114226 - 114250

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Spectral analysis of aeromagnetic profiles for depth estimation principles, software, and practical application
H.S. Sadek, S.M. Rashad, H. R. Blank
1984, Open-File Report 84-849
Fourier spectral analysis in recent years has become a widely utilized tool for the processing and interpretation of potential field data. It is particularly well suited to analysis of aeromagnetic maps and profiles, where coverage commonly is of broad scope and statistical treatment is appropriate. The techniques developed by earlier workers...
Geohydrology of the central Mesilla Valley, Dona Ana County, New Mexico
Clyde A. Wilson, Robert R. White
1984, Open-File Report 82-555
Five large-capacity irrigation wells, with depths ranging from 370 to 686 feet, were drilled by the Elephant Butte Irrigation District between 1973 and 1975, in the Mesilla Valley about 7 miles south of Las Cruces, New Mexico. These were the first deep wells in the area, and their installation provided...
State hydrologic unit maps
P. R. Seaber, F.P. Kapinos, G.L. Knapp
1984, Open-File Report 84-708
A set of maps depicting approved boundaries of, and numerical codes for, river-basin units of the United States has been developed by the U.S. Geological Survey. These ' State Hydrologic Unit Maps ' are four-color maps that present information on drainage, culture, hydrography, and hydrologic boundaries and codes: (1) the...
Physical and chemical characteristics of water in coal-mine ponds, eastern Oklahoma, June to November 1977-81
L. J. Slack, S. P. Blumer
1984, Open-File Report 84-446
Water at 102 sites in 59 coal-mine ponds in eastern Oklahoma was sampled at lease twice during June to November 1977-81 to determine temperature, specific conductance, dissolved oxygen, pH, and dissolved sulfate, chloride, iron, and manganese--as part of a study of the hydrology of the Oklahoma coalfield. These determinations show...
Fluorometric procedures for dye tracing
James E. Wilson Jr., Ernest D. Cobb, Frederick A. Kilpatrick
1984, Open-File Report 84-234
This manual describes the current fluorometric procedures used by the U.S. Geological Survey in dye tracer studies such as time of travel, dispersion, reaeration, and dilution-type discharge measurements. The outstanding characteristics of dye tracing are: (1) the low detection and measurement limits, and (2) the simplicity and accuracy of measuring...