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Resistivity methods apply a direct current into the subsurface and measure
the resultant change of voltage. Four electrodes are used in
resistivity measurements (two current electrodes and two potential
electrodes). By laying out a line of electrodes in a given
array/configuration, a profile is produced to image subsurface changes in
electrical properties.
This technique can be used to
map stratigraphy, track contaminant
plumes, and identify ore bodies
The Near Surface Geophysics Lab at
Kutztown University recently acquired a
DAS-1 64-electrode resistivity meter
from Multi-Phase Technologies
and the processing software
ERTLab.
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