The electrical resistivity of any materials depends largely on it is porosity along with the salinity of the water in the pore spaces. Even though the electrical resistivity of a significant is probably not diagnostic, certain materials have specific varieties of electrical resistivity. In all electrical resistivity surveying techniques, a known electrical present is passed through the ground between two (or even more) electrodes. The potential (voltage) of the electrical field caused by the application of the current is measured between two (or more) additional electrodes at various locations. Since the current is known, as well as the potential can be measured, an obvious resistivity can be calculated. The separation between the current electrodes depends on the type of surveying being performed and the required investigation depth