This report presents findings on "ground-water well inventory, water level measurements, and water-quality samplings" taken in Geauga County, Ohio. It includes maps showing potentiometric-surface changes.

Second volume of a report documenting a high-sensitivity airborne radiometric and magnetic survey of the Clarksburg quadrangle including results of data interpretation, significance factor profile maps, stacked profiles, and histograms.

Second volume of a report documenting a high-sensitivity airborne radiometric and magnetic survey of the Charleston quadrangle including results of data interpretation, significance factor profile maps, stacked profiles, and histograms.

Final report documenting a high-sensitivity airborne radiometric and magnetic survey of the Canton, Clarksburg, Cumberland, Charleston, Charlottesville, Jenkins, Bluefield, Roanoke, Corbin, Chattanooga, and Rome quadrangle areas including background information, a description of methods, data reduction and analysis, and data presented in maps, tables, and graphical forms.

Second volume of a report documenting a high-sensitivity airborne radiometric and magnetic survey of the Canton quadrangle including results of data interpretation, significance factor profile maps, stacked profiles, and histograms.

Abstract: A glacial outwash aquifer of about 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 of 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.