Ground electromagnetic and resistivity datasets were modelled using two different inversion methods. The main objective was to deduce accurate depth models that show variations in the subsurface geology. Groundwater bearing structures were investigated using geophysical methods consisting of electromagnetic induction (EI) and electrical resistivity tomography (ERT). An inversion program EM4Soil that models multi frequency electromagnetic data was used to generate 2-Dimensional depth models for shallow thermal spring aquifers. ERT data was modelled using Res2DINV software. The positive correlation of the inversion models showed that the two methods of inversion are complementary. The integrated geophysical survey approach proved to be an important tool for the rapid and cost effective determination of the geometry of shallow aquifers.


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