Groundwater exploration

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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.


Locating water in sedimentary aquifer.
This example, by Geological Survey of Austria, is part of a groundwater exploration program. The low resistivity area (blue color) near the surface, represents clay (low permeability). The high resistivity area (red color) represents the bedrock. Medium resistivity area (yellow and green) represents area with high permeability sand and gravel layers, where water is more likely to be found. The best place to drill for water would be around coordinate 1150 where there is deep layer of medium resistivity, i.e. most likely sand and gravel. The worst place to drill for water would be around coordinate 700 where the bedrock comes up close to the surface. Drilling in bedrock is more expensive and the only chance to find water there, is to find a water bearing fracture in the bedrock.


Locating water bearing fracture zones in bedrock.
This example shows a successful water exploration survey. A fracture zone in bedrock was located with Sting/Swift resistivity imaging. A well was drilled and it produced more than 100 gallons/minute from the fracture zone at 145-150 feet.

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Today the single-channel Sting R1 has been replaced by the even faster and more accurate instrument: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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