Carpenter, Philip J.
M.S. (Master of Science)
Department of Geology
Hydrogeology--Kentucky--Fort Campbell Region; Hydrogeology--Tennessee--Fort Campbell Region; Geophysics--Kentucky--Fort Campbell Region; Geophysics--Tennessee--Fort Campbell Region
Geophysical data were combined with published reports to construct a model of the hydrogeologic framework at Campbell Army Airfield near the Kentucky- Tennessee state line. Electrical resistivity, seismic refraction, and electromagnetic methods provide information on thickness and character of layers in the overburden, bedrock depth, and identified areas where pre-airfield drainage and topography have been altered. The thickness of the residuum overlying bedrock has been interpreted to range from 16 to 150 ft (4.9 to 45.7 m) on the basis of seismic refraction surveys and vertical electrical soundings. The accuracy of these geophysical methods has been verified by performing calibration soundings at four wells drilled into bedrock. Water-bearing zones above the regional, fractured and karstified aquifer in the St. Louis limestone are discontinuous and may be influenced by the topography and the degree of weathering of the underlying bedrock. The vertical hydraulic transmissivity may be increased over bedrock highs, resulting in locally faster drainage of the clay-rich residual soil. In addition, the relatively higher porosity epikarst zone at the residuum-bedrock interface, and heavily fractured sections within the bedrock may act as a conduit for the transmission and storage of LNAPL contaminant JP-8 (jet fuel) migrating through the overburden. Resistivity values computed from data collected over seismically defined bedrock highs are consistent with well-drained soils overlying bedrock. These areas may ultimately prove useful in identifying zones where JP-8 migration and storage is most likely.
Padar, Craig A., "Assessment of the hydrogeologic framework beneath Campbell Army Airfield, Fort Campbell, Kentucky, using geophysical technologies" (1998). Graduate Research Theses & Dissertations. 1547.
ix, 77 pages + 2 computer disks.
Northern Illinois University
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