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Monitoring pumping test response in a fractured aquifer using ground-penetrating radar
Tsoflias, Georgios P. Halihan, Todd Sharp, John M., Jr.
Tsoflias, Georgios P.
Halihan, Todd
Sharp, John M., Jr.
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Abstract
Fractured aquifers present a number of problems when attempting to characterize flow on the well scale (less than 100 m). Standard hydraulic testing methods are expensive because of the need for installation of monitoring wells. Geophysical methods may suffer from a lack of resolution and nonunique solutions to data interpretation. We used ground-penetrating radar (GPR) surveying during a pumping test in a well-characterized, fractured, carbonate aquifer to monitor the response of a permeable subhorizontal fracture plane. We observed radar signal amplitude and waveform variations along a fracture reflector and correlated the radar signal response to changes in the water saturation of the fracture. Combining hydraulic measurements with GPR data and electromagnetic modeling, we identified an asymmetric fracture drainage pattern, provided accurate spatial information about the saturation of the fracture, and detected the presence of hydraulic boundaries. This study demonstrates that GPR surveying can be used successfully for real-time monitoring of pumping tests in fractured carbonate aquifers.
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This is the published version. Copyright 2010 by the American Geophysical Union. All rights reserved.
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2001-05
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American Geophysical Union
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Tsoflias, G. P., T. Halihan, and J. M. Sharp Jr. (2001), Monitoring pumping test response in a fractured aquifer using ground-penetrating radar, Water Resour. Res., 37(5), 1221–1229, http://dx.doi.org/10.1029/2000WR900297.