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Page 4178, results 104426 - 104450

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Hydrogeologic maps of the central Oklahoma aquifer, Oklahoma
Scott C. Christenson, Robert B. Morton, Benard A. Mesander
1992, Hydrologic Atlas 724
This report presents hydrogeologic maps of the Central Oklahoma aquifer. The maps were prepared by measuring water levels in wells during the winder of 1986 and 1987; examination of geophysical logs to determine the altitudes of the top of selected geologic units and the base of fresh ground water; and...
Aeromagnetic map of the Tonopah 1 degree by 2 degrees Quadrangle, central Nevada
Donald Plouff
1992, Miscellaneous Field Studies Map 1877-C
This aeromagnetic map is part of a folio of maps of the Tonopah 1 degree by 2 degrees quadrangle, Nevada, Prepared under the Conterminous United States Mineral Assessment Program. Each product is designated by a different letter symbol, starting with A, in the U.S. Geological Survey Miscellaneous Field Studies map...
Mineral and energy resource assessment maps of the Mount Katmai, Naknek, and western Afognak quadrangles, Alaska
S. E. Church, J.R. Riehle, L. B. Magoon, D. L. Campbell
1992, Miscellaneous Field Studies Map 2021-F
On the basis of new geologic mapping and exploration geochemical studies, we have provided a mineral and energy resource assessment of the Mount Katmai, Naknek, and western Afognak quadrangles, Alaska. We delineate four tracts of ground that have metallic mineral resources. The mineral deposit types considered in each tract are...
Analytical solutions for one-, two-, and three-dimensional solute transport in ground-water systems with uniform flow
Eliezer J. Wexler
1992, Techniques of Water-Resources Investigations 03-B7
Analytical solutions to the advective-dispersive solute-transport equation are useful in predicting the fate of solutes in ground water. Analytical solutions compiled from available literature or derived by the author are presented for a variety of boundary condition types and solute-source configurations in one-, two-, and three-dimensional systems having uniform ground-water...
A modular finite-element model (MODFE) for areal and axisymmetric ground-water-flow problems, Part 2: Derivation of finite-element equations and comparisons with analytical solutions
Richard L. Cooley
1992, Techniques of Water-Resources Investigations 06-A4
MODFE, a modular finite-element model for simulating steady- or unsteady-state, area1 or axisymmetric flow of ground water in a heterogeneous anisotropic aquifer is documented in a three-part series of reports. In this report, part 2, the finite-element equations are derived by minimizing a functional of the difference between the true...
Applying the DRASTIC model: A review of county-scale maps
David R. Soller
1992, Open-File Report 92-297
The potential for contamination of ground water has become an issue of great concern to citizens and government alike, especially in the last decade. Numerous methods for assessing ground water vulnerability to contamination have been proposed and used. These methods include field-scale deterministic models that predict the rate of migration...