Detection of the Soft Soil at the Slope Area using Geoelectrical Resistivity Method

Abstract

The landslide occur commonly in the slope zone area. The landslide may cause the damage and lose the wealth. This research aimed to detect the soft soil zone of the landslide area using geolectrical resistivity method. The geoelectrical resistivity survey was conducted using Wenner configuration with a total of 40 electrodes. Interpretation of the geolectrical model was improved trhough the direct surface resistivity measurement. The geoelectrical resistivity model shows the relatively low resistivity value at the near surface. The low resistivity value indicates that the soil is not solid and it is possible the water seep to the pore of the soil. The relatively higher resistivity value indicates that the soil is relatively compact and thus, the water is relatively hard to enter the pore. The soft zone of the soil at the slope is clearly observed and possible to slide down whenever water intervene the soil condition.