Depth investigation using the resistivity method with Wenner configuration for tunnel planning

Rocks and minerals that exist on earth have electrical properties such as: natural electric potential, electrical conductivity, and dielectric constant. There are various methods used to determine the conditions below the ground surface. One of them is the geoelectric method. This method can be used as a way to investigate the electrical properties of the earth through the response captured from the ground in the form of potential difference, electric current, and electromagnetic field. The resistivity or resistivity geoelectric method is one type of geoelectrical method used to study subsurface conditions by studying the nature of electric currents in subsurface rocks of the earth. Based on the research objectives, the resistivity method is divided into two, namely mapping and sounding. The resistivity method by mapping uses the Wenner configuration, while the resistivity method by sounding uses the Schulmberger configuration. Geoelectric resistivity mapping method is a resistivity method that aims to study the horizontal variation of the resistivity of the subsurface layer. While the resistivity sounding method aims to study variations in the resistivity of the subsurface layers of the earth vertically. The resistivity method by mapping uses the Wenner configuration, while the resistivity method by sounding uses the Schulmberger configuration. With this geoelectric study, it is hoped that it can become a reference for the feasibility study of the Samarinda tunnel which has an impact on the efficiency and effectiveness of tunnel construction, both in terms of cost and construction time.