Engineering Geology

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Courtesy of Courtesy of Advanced Geosciences, Inc.

This is a collection of various cases where the 2D resistivity imaging method pioneered by Advanced Geosciences Inc have been successfully applied. Click on a section below and you will be shown a full 2D resistivity imaging brochure detailing the case in question.

These cases have been submitted by satisfied customers whom we thank for permission to publish their data on the web. Each detailed broschure will have a citation for the source of the data.


Using resistivity imaging for bedrock mapping in karst terrain.
Interesting example showing how well drill logs match the resistivity images. Schnabel Engineering has drilled 30 wells along three resistivity imaging profiles. The location of the wells are plotted on the profiles and wherever the boring hit bedrock, a crossbar has been placed on the plot. This way it is easy to see how well the resistivity image correlates to the bedrock topography.

Karst fracture mapping

Resistivity imaging for mapping karst fractures.
Electrical resistivity imaging showing solution-widened clay-filled fractures in an Ordovician limestone. P.E. LaMoreaux & Associates in Oak Ridge, Tennessee, used their Sting/Swift system with 56 electrodes at 5 foot spacing to investigate the site. The profile was surveyed using the roll-along technique moving 14 electrodes at a time.

The geophysical instruments used in the resistivity imaging cases described here are the AGI SuperSting R8/IP earth resistivity meter and the AGI Sting R1 earth resistivity meter together with the AGI Swift multi electrode cables and smart switches.
These make up systems with extremely fast data acquisition in the field.
Today the single-channel Sting R1 has been replaced by the even faster and more accurate instrument:
SuperSting R8/IP
The interpretation of data like this can be done using the 2D inversion program AGI EarthImager 2D available from AGI.

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