Identification of slip surface based on geoelectrical dipole-dipole in the landslides hazardous area of Gedangsari District, Gunungkidul Regency, Province of Daerah Istimewa Yogyakarta, Indonesia

[摘要] Landslides problems that often occurred at Mertelu Village, Gedangsari District, Gunungkidul Regency, DIY are caused by several factors. In addition to the fact that the village is located in a fairly steep area, there is also a slip surface from the existing soil type. The purpose of this research is to gather the slip surface information based on resistivity method using Dipole-dipole configuration. The initial stage is done by taking 4 representative lines, which each line is 300 meters long, spaced 20 meters and using n = 1-8. The results showed that rock resistivity varied from 2 to 200 Ohm-m also divided into very low, low, medium and high resistivity. The interpretations are very low resistivity (2-8 Ohm-m) as claystones and or siltstones, low resistivity (8-20 Ohm-m) as muddy sandstones, medium resistivity (20-50 Ohm-m) as sandstones and high resistivity (> 50 Ohm -m) as massive sandstones. In general, the bedding begins with a very low resistivity at the top and high resistivity at the bottom. The slip surface is marked as a very low resistivity which lays above a higher resistivity. The landslide analysis indicates that the Gedangsari area is dominated by rotational landslide.

[发布机构] Geophysics Engineering, Universitas Pembangunan Nasional veteran Yogyakarta, SWK (104) North Ring Rd. Street, Condong Catur; 55283, Indonesia^1;Geophysics Departemant, Universitas Gadjah Mada (UGM), Sekip Utara BLS 21, Yogyakarta; 55281, Indonesia^2

[效力级别] 矿业工程

[关键词] Dipole-dipole;Hazardous area;High resistivity;Landslide analysis;Low resistivity;Resistivity methods;Rock resistivity;Slip surfaces