Comparison of terrain corrections based on the point source and line source DC methods

In the direct current (DC) exploration method, topographic relief distorts apparent resistivity curve. To eliminate effects of terrain fluctuations, two undulating terrains comprising valleys and ridges were investigated in present study. An unstructured triangular mesh method which wave number k its coefficient g obtained using integral point line source surveys conducted comsol multiphysics. Current sources evaluated two-dimensional (2-D) finite element forward modeling, whereas correction was performed both comparison conformal transformation methods. The results reveal comparable theoretical curves for sources, but quantitative characteristics differ. is suitable curves, only applicable to source. Even though electric fields associated with differ, that based on electrical cross-section curve profile remains effective.