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Integrated Geophysical Investigation Of Karst Features – Inner Bluegrass Region Of Kentucky, Jamin C. Frommel
Integrated Geophysical Investigation Of Karst Features – Inner Bluegrass Region Of Kentucky, Jamin C. Frommel
Theses and Dissertations--Earth and Environmental Sciences
High-resolution electrical-resistivity, seismic-refraction, and seismic-reflection surveys were performed at three locations in the Inner Bluegrass Region of Kentucky along coincident survey lines in order to correlate results and determine which method is most effective at locating karst features in this area. The first two survey locations at Slack’s Cave and the Kentucky Horse Park were chosen in order to investigate known karst features. High and low electrical-resistivity anomalies were correlated to air- and water-filled karst voids, respectively. Seismic velocity anomalies, including parabolic time suppressions, amplitude terminations, and surface-wave backscatters, were also observed and correlated to these karst voids. These findings …
A 2-D, Variable-Density Numerical Model Of Subsurface Fluid Flow Through The Edwards Aquifer, New Braunfels, Tx: Mechanisms Inhibiting Flow Across The Freshwater/Saline-Water Interface, Scott Ryan Tipple
LSU Master's Theses
The Edwards aquifer in south-central Texas, U.S., composed of faulted carbonate bedrock, contains freshwater and saline water. In aquifers that are used as a source of drinking water and that contain fresh and saline waters, saline-water intrusion can result in degradation of water quality. Yet, in the Edwards aquifer, limited saline-water intrusion has occurred. The questions addressed are “Why is the saline-water intrusion less than expected,” and “Is there a trigger that will result in saline-water intrusion into the freshwater reservoir?” Three hypotheses were tested. One: an extremely saline water density might prevent mixing across the interface. Two: faults could …