COMPUTATION OF THE ELECTRIC POTENTIAL IN THREE-DIMENSIONAL STRUCTURES* |
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| Authors: | H SCRIBA |
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| Institution: | Institut für Geophysik, ETH Zürich, CH-8093 Zürich, Switzerland. |
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| Abstract: | A method has been developed for computation of the electrical DC potential of an arbitrary three-dimensional resistivity structure using a finite difference method. The threedimensionality is necessary for interpretation of geoelectrical soundings with controlled point sources over a laterally inhomogeneous medium. Lateral inhomogeneities should be considered in resistivity soundings with large layouts. The results obtained with the described method permit a more realistic representation of geological features. The resolution of the method is determined by the number of elements in the resistivity network. The problem of core memory space has been resolved by using random access disc files. The results computed using a Fortran program are in good agreement with analytically obtained solutions. |
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