Determination of the Hydrogeologic Properties of Lakebeds Using Offshore Geophysical Surveys |
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| Authors: | Kenneth R Bradbury Robert W Taylor |
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| Institution: | Wisconsin Geological and Natural History Survey, Madison, Wisconsin 53705-4096.;Center for Great Lakes Studies, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53201. |
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| Abstract: | Studies of the relationships between ground-water systems and surface-water systems (lakes) generally require knowledge of the hydrogeologic properties of lakebed materials. Direct measurement of these properties may be prohibitively expensive or difficult in an offshore environment. A correlation between longitudinal conductance, a geoelectric parameter, and lakebed leakance (vertical hydraulic conductivity divided by thickness) may provide a rapid and inexpensive method for estimating lakebed hydrogeological properties using data collected by offshore seismic and electrical surveys. A test of the method at three study sites in Lake Michigan shows a positive linear relationship between the logarithm of longitudinal conductance and the logarithm of lakebed leakance at the three sites. |
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