Subsurface prediction using resistivity method (Case study: Bira, South Sulawesi, Indonesia)

Abstract

Resistivity method is one of active geophysics method which is used electric current on subsurface. Resistivity method studies rock resistivity characteristic beneath line measurement. Bira is one of tour destination in Bulukumba Regency, South Sulawesi. This area is developing for serving tourists well. The aim at this research is to predict lithology subsurface in this area based on resistivity profile to give information for that activity. Based on geology, Bira consists of Tacipi Limestone Member of Walanae Formation. We used Wenner-Schlumberger configuration and data processing used the cell-based method inversion. The result of resistivity survey has two categories. The first are low resistivity around 1.93 – 13.9 Ωm, estimated as fresh groundwater on 10 – 30 meter depth. The second is medium to high resistivity around 13.9 – 518 Ωm, predicted as limestone on 0 – 10 meter depth.