DEPTH OF INVESTIGATION IN DIRECT CURRENT METHODS

1 October 1971

journal article
Published by Society of Exploration Geophysicists in Geophysics

Vol. 36 (5) , 943-959
https://doi.org/10.1190/1.1440226

Abstract

The depth of investigation in any direct current resistivity method of surface geophysical prospecting is defined, following Evjen (1938), as that depth at which a thin horizontal (parallel to ground surface) layer of ground contributes the maximum amount to the total measured signal at the ground surface. Using the equivalence between static and stationary fields, we have found the following values for the absolute depths of investigation in homogeneous ground.

Keywords

HORIZONTAL
HOMOGENEOUS
PARALLEL
DIRECT CURRENT
GEOPHYSICAL
STATIC
ABSOLUTE
DEPTH OF INVESTIGATION
EVJEN

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