Determination of Saltwater Intrusion Zone Based on Groundwater Physical Properties on Eretan Coastal Area Indramayu Jawa Barat

Abstract

The research area is a coastal area that has great groundwater potential. However, if the management is not appropriate then it can cause saltwater intrusion problem. This condition can be indicated by the value of EC, TDS, pH and temperature. The greater EC and TDS value indicated the higher saltwater intrusion. From 40 measurement points conducted in 18 wells obtained the lowest value of the TDS 520 mg/L at SG10 at 1.21 masl and the highest value 3580 mg/L at SG12 at 0.5 masl. As for the lowest value of EC 1050 μS/cm at SG10 at 1,21 masl and highest value 7050 μS/cm at SG12 at 0,5 masl. Based on the research there is a points of anomaly that have higher EC and TDS than the surrounding area. This anomaly shows that at these points there has been overpumping and classified into the highest saltwater intrusion zone that requiring monitoring.