Interpretation of Resistivity Sounding Data for Multi-Layer Vertical Earth Model

Soil resistivity plays a key role in designing grounding systems for high-voltage power transmission lines and substations. The objectives of this paper consist of computing the best estimated value of the apparent resistivity and the electrode grounding resistance of a vertical N-layer soil. Then, earth parameters are precisely calculated by applying an inversion method. The inversion method is useful to estimate soil parameters from Schlumberger measurements. Four theoretical models are selected in order to validate and test the inversion scheme of the method.