Results of high-density resistivity show that the thickness and depth of phreatic water aquifer is
generally 4 to 5 meter and the aquifer is composed of thin layer sand and sandy silt clay with its
background resistivity value generally below 20 ohm-m. 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 lower strata is
constituted by a sandy gravel layer of Cretaceous residues mixed with fine/medium sand at depth from 35
to 42 meter with a background resistivity value generally below 100 ohm-m. The background resistivity