Soil Resistivity Testing

Soil resistivity measurements have a threefold purpose.

First, data is used to make sub-surface geophysical surveys as an aid in identifying ore locations, depth to bedrock and other geological phenomena.

Second, resistivity has a direct impact on the degree of corrosion in underground pipelines. A decrease in resistivity relates to an increase in corrosion activity and therefore dictates the protective treatment to be used.

Third, soil resistivity directly affects the design of a grounding system, and it is to that task that this discussion is directed. When designing an extensive grounding system, it is advisable to locate the area of lowest soil resistivity in order to achieve the most economical grounding installation. .
Source : Chauvin Arnoux, Inc. d.b.a AEMC Instruments;Effects of Soil Resistivity on Ground Electrode Resistance;Factors Affecting Soil Resistivity

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