STUDI GEOLISTRIK UNTUK MENGETAHUI LAPISAN AKUIFER DENGAN METODE KONFIGURASI SCHLUMBERGER DI DESA PERBARAKAN KECAMATAN LUBUK PAKAM KABUPATEN DELI SERDANG

Abstract

Water is one of the sources of human needs on earth (Halik, 2008). The increasing number of people requires a clean water supply that is easily obtained, but some problem areas in Medan city and Deli Serdang Regency according to the government of North

Sumatra Province in Medan and surrounding areas the total demand for clean water is 11,000 liters / second and an additional water supply of 4,000 liters / second is needed with water availability of 200 liters / second. So that the water supply in the Medan city area and its surroundings still lack a water supply of 3,800 liters / second article sumutprov.go.id (https://sumutprov.go.id/artikel/artikel/resmikan-program-master-meter-di-medan-- gubernur--edy-rahmayadi-targetkan-tuntaskan--kebutuhan-air-bersih-di-akhir-periode). In addition, in Perbarakan Village, Lubuk Pakam Subdistrict, where the research area is difficult to get clean water because the area is a lot of oil palm plantations so that the community's water source in this area can be obtained from well water. this makes this research carried out to interpret the existence of groundwater that can be used as a clean water source in the research area conducted in Perbarakan Village, Lubuk Pakam Subdistrict, Deli Serdang Regency, North Sumatra Province. From the results of data processing, data interpretation was then carried out. Data interpretation is done by comparing the RMS table with the resistivity table rules of Suyono (1978), Astier (1971) Zohdy (1974) and the geological map of the research area to determine the type of rock. The stratigraphy of the research site according to the estimated specific gravity value consists of 5 lithologies namely Cover Soil (97.5-127Ω), Gravel Sand (5.84-2692 Ω), silt (13.8-85.1Ω), Gravel Sand containing fresh water (62.4-65Ω), Gravel Sand (218-330Ω). The presence of a water-bearing layer (aquifer) at both measurement points is at a depth of 56 meters which is estimated as gravel sand which is a permeable layer