The top layer of micro confined water aquifer is composed of multilayers of fine and medium sand in the middle Pleistocene series of silty clay at depth from 20 to 26 meters with a background resistivity value generally below 60 ohm-m
The top layer contains no water pressure. Arranged contiguously on a layer of sand. With medium At a depth of 20-26 meters, the resistivity generally below 60 Ωm.