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Walter Reed

Salt contaminated soils propose environmental risks for land that once flourished for agriculture use. To successfully remove or remediate a salt contaminated environment it is important to know the boundaries of the contamination, identify any sources of contaminates, and monitor the movements of contaminates. Electromagnetic geophysical techniques provide a feasible noninvasive approach to studying the subsurface and identifying the location and perimeter of a salt contaminated environment. This study compares three separate electromagnetic methods including galvanic DC resistivity, capacitively coupled resistivity, and frequency domain conductivity. . In order to evaluate these methods, a galvanic DC survey was performed using a Syscal Pro-Switch 72 along with surveys from the Gem-2 and OhmMapper. This data was then compared with well logs taken at the survey site to verify the accuracy of the data. The three methods were then compared based on their physical limitations to collect data at the site as well as their ability to collect the most accurate data. It was found that the Gem-2 has the best capability for efficiently and effectively carrying out a geophysical survey of a salt contaminated environment.

Project Title

Evaluation of Geophysical Techniques in the Determination of a Salt Contaminated Environment

Faculty Mentor Name

Dr. Heather Lehto


ASU Undergraduate Research Grant