Pendugaan Keberadaan Air Tanah sebagai Sumber Air Bersih Menggunakan Metode Geolistrik di Kecamatan Medan Belawan, Kota Medan, Provinsi Sumatera Utara

Abstract

The Medan Belawan District is a research area to study the potential of groundwater. The research aims to determine the type of layers, the depth of the earth's surface containing groundwater, and the direction of groundwater flow. The geoelectric resistivity method with the Wenner-Schlumberger configuration can be used to conduct the research. The resistivity data can be processed using Res2DINV to visualize the subsurface of the research location. From the research results, it was found that the underlying layer of the soil surface in Medan Belawan District that acts as an aquifer is sand located at a depth of 0 - above 40 m below the soil surface, sandy clay at varying depths of 0 - above 40 m below the soil surface, and clay at a depth of 5 - above 40 m below the soil surface. The aquifer layer containing groundwater is in the resistivity value group 1 with a resistivity value of 0,013 - 262 Ωm. Based on the lithology distribution and compared to the contour map, location point IV has a higher elevation than location point I, where the direction of water flow is from a higher to a lower place.