Subsurface mapping of University Diponegoro Tembalang campus based on resistivity data

• Published in: Journal of physics. Conference series Vol. 1524; no. 1; pp. 12146 - 12154
• Main Authors: Setyawan, A, Gernowo, R, Jatmiko, E S, Wijayaningrum, Aribowo, Y, Najib
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.04.2020
• Subjects: Alluvial deposits; Alluvium; Breccia; Data collection; Data processing; Electrical resistivity; Geoelectricity; Mapping; Sandstone; Water resistance
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/1524/1/012146

Subsurface mapping using the geoelectric method has been carried out in the area of Undip Campus, Tembalang to determine the distribution of subsurface layers resistivity. This study employs the Wenner configuration geoelectric method. Data were collected at seven points with a track length of 100 meters and a distance among electrodes of 5 meters. Data processing is carried out using RES2DINV software packages that produce rock resistivity values and depth estimates, then the interpretation of each track is carried out in detail by taking into account the geological information available in the Undip campus, Tembalang. The results of the interpretation show that the study area is dominated by breccias which are Kaligetas formations. The breccia rocks themselves are claystone which tends to be water-resistant and there is also sandstone. Nearly every data collection point has the same cross-section. Claystone with resistivity ranges from 3.05 Ωm to 26.5 Ωm. Sandstones with resistivity range from 20.0 Ωm to 135 Ωm. The rest found alluvium and sand with a resistivity of almost more than 100 μm.