Geohydrological Parameters Estimation from Electrical Resistivity Applications to the Dahomey Basin of Nigeria

Abstract

An alternative approach of estimating geohydrological parameters using the electrical resistivity method in investigating aquifer hydrological properties is presented in this research. The application of electrical resistivity to the Dahomey Basin was aimed at delineating the depth to water level, vadose and lithological compositions and aquifer transmissivity. 1D and 2D resistivity data inversion results showed that vadose sediment compositions include porous sandstones, limestones, shales and topsoils. Depth to water level was derived from the inversion. Transverse conductance from the study correlated with the aquifer transmissivity. This study has shown that important geohydrological parameters can be estimated from electrical resistivity which will assist in making informed decisions on expensive pump testing exercises.