^Subsurface Stratigraphic Investigation Using Schlumberger Resistivity Method in Sumbersari, West Java^ Iswandaru, Zaenal, Andriento Nurrochman, Mohammad Rahman A., Elfida Moralista, Yuliadi
Universitas Islam bandung
Abstract
This study aims to identify the subsurface stratigraphic conditions in Sumbersari Village, Ciparay District, Bandung Regency, using the electrical resistivity method with a Schlumberger configuration. The study is motivated by the issue of limited access to clean water faced by some residents, particularly during the dry season when shallow wells often experience water shortages. Therefore, an effective exploration method is needed to determine the potential and depth of aquifer layers as a source of groundwater.
The electrical resistivity method was chosen because of its effectiveness in mapping vertical variations in soil and rock resistivity, which are closely related to lithological characteristics and hydrogeological conditions. Measurements were carried out using a sounding system along several survey lines, with the current electrode spacing (AB) progressively increased to investigate deeper subsurface layers. The apparent resistivity data obtained were processed using IPI2Win software to generate a 1D resistivity model versus depth.
The interpretation results reveal resistivity variations that represent different lithologies, such as clay, sand, gravel, and possible bedrock. Zones with low resistivity values are interpreted as saturated layers (aquifers), while high resistivity values indicate hard or dry rock. This information is expected to serve as a scientific basis for the planning of clean water well drilling and the management of subsurface water resources in the area.
