Groundwater Potential Investigation Using Geoelectric Method with Schlumberger Electrode Configuration in Catur Rahayu Village, Dendang District, Tanjung Jabung Timur Regency, Jambi Province

Abstract

The planning of making boreholes for groundwater exploitation on investigations location is necessary to investigate using the geoelectric method. This method is applied with Schlumberger electrode configuration to obtain information about the coating of subsurface rocks before drilling, where detection target to a depth of about 50 m. The information that will be obtained from the results of this geoelectric measurement is in the form of log geoelectrical sounding with the resistivity price of each rock layer that reflects the form of rock layers below the surface. Furthermore, from the rock resistivity value classification, it can be estimated the type / lithology of each rock layer. From the investigation result using geoelectric method obtained the illustration that the cover layer consists of soil and peat with resistivity values of 60.42 to 245.84 ohms-m. The second layer is in the form of a peat layer with a relatively high resistivity value of 116.78 to 212.58 ohms-m. The third layer is estimated to be a layer dominated by clay, with a relatively low resistivity value of 11.31 to 26.53 ohms-m. Finally, the fourth layer is estimated to be a layer dominated by sand, where the resistivity value is 41.99 to 59.50 ohm-m. This sand layer is expected to be an aquifer layer because it has high water passing characteristic. After the results of groundwater drilling are compared with the results of geoelectric research, it can be concluded that the results of geoelectric research can be used as a guide when conducting groundwater drilling activities.