Rekinagara, Istifari Husna and Kusumayudha, Sari Bahagiarti and SETIAWAN, Jatmiko (2019) KINEMATICS ANALYSIS AND THE ROLE OF GEOLOGICAL STRUCTURES ON SLOPE FAILURES OF MENOREH HILLS, CASE STUDY: SAMIGALUH DISTRICT, KULON PROGO REGENCY AND, BOROBUDUR DISTRICT, MAGELANG REGENCY, INDONESIA. Proceedings of International Conference on Landslides and Slope Stability:Advancement of Research, Practice, and Integrated Solution on Landslide. J3-1-J3-13.
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Abstract
Menoreh Hills in the Kulonprogo Regency of Yogyakarta Special Territory, Magelang Regency and Purworejo Regency in Central Java belongs to landslide subscriptions area in almost every rainy season. The most recent landslides occur during late November 2018 to early January 2019. Problem of mass movements in the Menoreh Hills is a manifestation of geological conditions, including geomorphology, lithology, and especially geological structures. The lithology composing the study area is dominated by a group of volcanic rocks consisting of breccia and lava from the Kaligesing Formation and Dukuh Formation. The physical condition of these rocks is generally weathered to form soil with a thickness reaching 5 m. The geological structures exist in the study area are joints and faults caused by the main stress relative to the North-South direction. Faults in the study area can be classified into right lateral slip fault, left lateral slip fault, reverse fault, right-reverse fault, left-reverse fault, and right-normal fault. Based on the results of kinematics analysis on rock slopes with Markland method, there are 7 slopes have the potential for fail with wedge and topple types. While the result of soil slope analysis with the Spencer method, there are 4 slopes that prospective for landslides, they are located in Ngargosari village and Purwoharjo village. Almost all of the potential slope failure are situated at the adjacent or passed by the fault strike. It proves that the geological structures have a very important role as the cause of slope failures in the Menoreh Hills.
| Item Type: | Article |
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| Subjects: | Q Science > QE Geology |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | SARI BAHAGIARTI KUSUMAYUDHA |
| Date Deposited: | 06 Apr 2020 06:05 |
| Last Modified: | 06 Apr 2020 06:05 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/22636 |
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