Investigation the vulnerability potential of landslide in Jayagiri area using the geoelectric method

Abstract

Landslides are the third-largest natural disaster and have resulted in many victims, both property and casualties. One area where landslides occurred with casualties and heavily damaged houses was in Jayagiri, Lembang, West Java, Indonesia. One essential parameter in researching landslide-prone areas is the sliding area, where rocks or soil above the plane can move, resulting in landslides. Research on landslides continues to be developed from various fields of science. This study uses the Geoelectric method to determine and analyze the sliding area carried out in the Jayagiri area, Lembang. A reasonably significant resistivity value characterizes this field compared to the surrounding rocks. The measurement result on three lines shows that the study area is divided into two parts: the dominance of high resistivity and low resistivity. 2D inversion modeling shows that the slip plane has a resistivity value of 500 ohms.m at a depth between 9 m at the top of the slope and 13 meters at the bottom of the slope. The existence of a relatively shallow sliding field indicates a depth of water infiltration with a resistivity value of 10 Ohm.m, which is shallow enough so that it can be assumed that this area has the potential for landslides.