LAND SUBSIDENCE ANALYSIS BASED ON 2D RESISTIVITY MODELLING OF DC RESISTIVITY METHOD IN CURUGPANJANG VILLAGE, BANTEN

• Main Author: Hidayat, Syamsul
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/75623
• Institution: Institut Teknologi Bandung

Land Subsidence is a phenomenon of subsidence of the land surface compared to the reference point. This phenomenon can be caused by natural factors, groundwater extraction, and building factors. Geoelectrical method was used to analyze the subsurface conditions in Curugpanjang Village consisting of four lines. In this study, the potential value (????) and current strength (????) will be obtained which will be used to calculate the resistivity value. Data processing from the measurement results is carried out using the Res2Dinv software. The subsurface cross-sectional image of the resistivity value obtained shows the dominance of rocks that have low resistivity. The layers suspected of acting as subsidence planes are clay and pumice (1-200 ?m) which are found throughout the track with a layer depth range (0-9 m). The results of the sample test showed that the soil was in a porous state with a high water content. Analysis of soil stability (safety factor) shows that the CK-3 track is in critical condition and the CK-1 track is in stable condition