Thesis (M.S.)--Texas State University--San Marcos, 2008. / Vita. Includes bibliographical references (leaves 47-51). Also available on microfilm.

Thesis (Ph. D.)--University of Missouri-Columbia, 2002. / Typescript. Vita. Includes bibliographical references (leaves 103-115). Also available on the Internet.

Thesis (Ph. D.)--University of Missouri-Columbia, 2002. / Typescript. Vita. Includes bibliographical references (leaves 103-115). Also available on the Internet.

Thesis (M.S.)--Texas State University-San Marcos, 2006. / Vita. Appendices: leaves 23-46. Includes bibliographical references (leaves 47-54).

Thesis (M.S.)--Texas State University-San Marcos, 2006. / Vita. Appendices: leaves 23-46. Includes bibliographical references (leaves 47-54).

Spontaneous potential (SP) is a geophysical method that measures naturally occurring voltage in the earth. Negative anomalies arise from electrokinetic, or streaming potential, effects resulting from the flow of groundwater. In this study SP was monitored at sites in karst terrain in Virginia. The results were evaluated for effectiveness in detecting groundwater flow paths and rates. The ability of SP to distinguish between diffuse flow and conduit flow was examined. Soil temperature, soil moisture, and precipitation are major variables influencing SP data. An automated data collection system was devised and used for long term monitoring of SP changes and environmental variables and for measuring SP changes induced by artificial recharge of water into a sinkhole. Results were evaluated by comparison with geological observations, electrical resistivity, stream flow measurements, and speleological surveys. SP can effectively locate and track shallow groundwater flow paths in karst terrain. A relationship was observed between SP and changes in flow rate where the flow was through porous material, but SP could not be directly related to flow through solutional conduits. However, conduits may be indicated by SP anomalies where soil moisture is drawn into fractures that supply water to conduits. The influence of geologic structure must be considered in, interpreting SP results in karst. Refinement of the SP technique is promising for applications to environmental and geotechnical problems. / M.S.

Thesis (M.Sc.(Environmental and Engineering Geology))--University of Pretoria, 2008. / Abstract in English. Includes bibliographical references (leaves 94-106).

Thesis (M.S.) -- University of Tennessee, Knoxville, 2005. / Title from title page screen (viewed on Feb. 7, 2006). Thesis advisor: Larry D. McKay. Vita. Includes bibliographical references.

In southeastern Florida, the majority of drinking water comes from the Biscayne aquifer. This aquifer is comprised of heterogeneous limestones, sandstones, sand, shell and clayey sand with zones of very high permeability. Visualizing the spatial variations in lithology, porosity and permeability of heterogeneous aquifers, like the Biscayne, can be difficult using traditional methods of investigation. Using the Roxar IRAP RMS software multi-layered 3D conceptual geomodels of the lithology, cyclostratigraphy and porosity were created in a portion of the Biscayne aquifer. The models were built using published data from borehole geophysical measurements, core samples, and thin sections. Spatial relations between lithology, cyclostratigraphy, porosity, and preferential flow zones were compared and contrasted to better understand how these geologic features were inter-related. The models show local areas of differing porosity within and cross-cutting different cycles and lithologies. Porosity in the Biscayne aquifer study area follows a hierarchy attributed to lithofacies with a pattern of increasing porosity for the high frequency cycles. This modeling improves understanding of the distribution and interconnectedness of preferential flow zones, and is thus an invaluable tool for future studies of groundwater flow and groundwater contamination in the Biscayne aquifer. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2014. / FAU Electronic Theses and Dissertations Collection