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Allan C. Razem

Publications and source records attributed to Allan C. Razem.

5 recordsLinked to original sources
USGS1981

Ground-water hydrology of strip-mine areas in eastern Ohio (conditions during mining of two watersheds in Coshocton and Muskingum counties)

Ground-water conditions during coal strip mining in two small watersheds are described as part of an ongoing study of effects of mining on hydrologic systems. Both watersheds were underlain by stratified sedimentary rocks containing two perched aquifers above clay beds which underlaid the major coal seams. Mining involved removing the overburden rocks, including the top aquifer, stripping the coal seam, and recontouring the overburden spoils to the approximate premining shape of the watershed. Water levels in the top aquifer declined as mining neared the watersheds, but destruction of observation wells precluded a record of any decline during mining in the watersheds. Depletion of the top aquifer was reflected in base flow of streams, which was reduced and more highly mineralized after mining. Initial saturated thickness of replaced overburden spoils ranged from 0 to 4 feet, based on data from observation wells installed immediately after reclamation. Down-hole specific-conductance measurements of water in the spoils suggest the presence of more highly mineralized water than that in the premining top aquifer. No significant effects of mining are evident on ground-water levels or quality beneath the stripped coal.

Ohio↗
USGS1980

Digital-computer model of ground-water flow in Tooele Valley, Utah

A two-dimensional, finite-difference digital-computer model was used to simulate the ground-water flow in the principal artesian aquifer in Tooele Valley, Utah. The parameters used in the model were obtained through field measurements and tests, from historical records, and by trial-and-error adjustments. The model was calibrated against observed water-level changes that occurred during 1941-50, 1951-60, 1961-66, 1967-73, and 1974-78. The reliability of the predictions is good in most parts of the valley, as is shown by the ability of the model to match historical water-level changes.

Utah↗
USGS1980

A model for flow through a glacial outwash aquifer in southeast Franklin County, Ohio

A glacial aquifer of 70 square miles in the Scioto River valley southeast of Columbus, Ohio, was modeled as a potentially major source of water. The model was constructed from available hydrologic data: Records of precipitation, well hydrographs, well logs, two ground-water level surveys, and analyses of six aquifer tests. Utilizing this array of data, water levels determined from a series of steady-state simulations of different hydraulic conductivity distributions were calibrated against measured (December 1977) ground-water levels. The simulations that provided the best matches used two hydraulic conductivity distributions: One was an areally varying hydraulic conductivity distribution; the other an areally uniform hydraulic conductivity (40 feet per day) distribution. After these more probable hydraulic conductivity distributions were found, they were utilized in steady state maximal pumping simulations. The maximal well-field yield for these simulations was 20.5 million gallons per day for the areally varying hydraulic conductivity distribution, and 11.3 million gallons per day for the areally uniform hydraulic conductivity. Sensitivity of well yield to changes in well position and streambed leakance changes was investigated also.

Ohio↗