PENDUGAAN BIDANG GELINCIR LONGSORAN TANAH DENGAN METODE GEOLISTRIK KONFIGURASI WENNER DI KALURAHAN HARGOMULYO, KOKAP, KULONPROGO

Rezal Prihatin, NIM.: 19106020012 (2023) PENDUGAAN BIDANG GELINCIR LONGSORAN TANAH DENGAN METODE GEOLISTRIK KONFIGURASI WENNER DI KALURAHAN HARGOMULYO, KOKAP, KULONPROGO. Skripsi thesis, UIN SUNAN KALIJAGA YOGYAKARTA.

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Abstract

Landslide is a frequent disaster in hilly areas, especially during the rainy season. Monday, November 7, 2022 a slide cliff hit a house and a motorcycle at Tangkisan 1, Hargomulyo, Kokap, Kulon Progo. Among the forms of disaster mitigation is by mapping the location of vulnerable landslides. One of them is by identifying the layer of rocks that are the sliding fields. Using the simple principle of electrical resistivity, rock structures beneath the surface can be identified. This is because each rock has a different type of resistivity value. The research was conducted with the Naniura NRD 300 HF device. The device will inject current into the soil and receive potential differential signals generated from within the ground. The potential and current differentials are then converted into the type of resistivity to identify rocks. The research was carried out with 4 geo-electric resistivity lines configuration wenner. Wenner configuration provides a good lateral model for the process of identification of rock structures under the surface. The location of the research is at the andesite breakthrough formation. Andesite breakdown is composed over the rocks of andesite hyperstein to trakiandesite.The research results show that the bedrock has a resistivity value of 141 Ωm to 363 Ωm. The slip area has a resistivity value of 54,4 Ωm to 141 Ωm. Material with the potential for landslides at the research location has a resistivity value of 13,1 Ωm to 54,4 Ωm.

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