Identification of aquifer using geoelectric resistivity method of reciprocal schlumberger array (case study: Tanggamus, Lampung Province)

Abstract

Tanggamus district known as an area indicated to have a potential aquifer layer because there are many areas of groundwater infiltration. This study aims to obtain the depth of aquifer layer and aquifer type found in Tanggamus area. This research was carried out using geoelectric resistivity method of reciprocal Schlumberger array. Based on the results of data processing in correlated with geological data, aquifer layer is identified in rough sand rocks with resistivity value 35-100 Ωm. The confined aquifer layer lies at a depth of 20.6-136 m in the measuring lines of 3, 4 and 5. The unconfined aquifer layer lies at a depth of 1.71-151 m in the measuring line of 1. The leaked aquifer layer lies at a depth of 2-169 m in lines 2 and 5. The characteristics of the layers of rock consists of sandstone as an aquifer, breccia as an aquifuge and tuff as an aquiclude.