IDENTIFIKASI LAPISAN AIR TANAH BAWAH PERMUKAAN MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DESA DURIN TONGGAL, SUMATERA UTARA

Abstract

The purpose of this study is to know the resistance value of subsurface rock types in the study area, to know the type of subsurface layer based on resistivity value to know the lithology of the study area, to know each permeable layer that is considered an aquifer layer. Measurements were made as many as 4 (four) measurement points, the length of each stretch of each of the four measurement points was 300 meters. From the interpretation through the value of the Suyono type prisoner in 1978, the estimation of the existence of the water-carrying layer is suspected to be at a depth of about 21.4-82.5 meters with a thickness of 61.1 meters with suspected lithology as an aquifer is sand and gravel to sandstone. According to the value of Suyono type prisoners (1978), it consists of: Cover Soil 1.07-1.51 meters, Silt-Clay 6.82-7.8 meters, Sand and Gravel 12.7-17.4 meters and Sandstone 53.1-61.1 meters. The determination of the type resistance value from the interpretation results in accordance with the local geological conditions of the research location is according to Suyono (1978) because the research location is the dominant constituent of Qvbs rocks (singkut units). The existence of a water-carrying layer (aquifer) is thought to be at a depth ranging from 21.4-82.5 meters with a thickness of 61.1 meters. The lithology of the layer that is thought to be the source of water carriers (aquifers) is Sandstone.