The geo-electrical family of geophysical methods includes electrical resistivity, induced polarization, and spontaneous potential. Electrical resistivity is a robust method that relies on measured contrasts in the ability of subsurface materials to conduct electrical current. Induced Polarization (IP) measures the chargeability of subsurface materials and can be collected along with electrical resistivity data. Spontaneous Potential (SP), also known as self-potential, measures the voltage of natural earth electrical potential occurring on the ground surface. These methods often complement one another and may be measured from the surface, in a borehole, or by waterborne instruments for marine applications. Geo-electrical methods may also be combined with other geophysical methods to allow us to leverage synergies.
Gehrig’s investment in geo-electrical equipment, data processing software, and research and development allows us to offer our clients the best possible results from 1-D, 2-D, and 3-D geo-electrical studies.
Typical geo-electrical investigations include:
Example graphics from previous geo-electrical investigations are included below.