Analisis Kerawanan Longsorlahan Di Kabupaten Sleman Provinsi Daerah Istimewa Yogyakarta

RAMADHAN, DIMAS MUHAMMAD YANUAR and , Ir. Taryono, M.Si (2021) Analisis Kerawanan Longsorlahan Di Kabupaten Sleman Provinsi Daerah Istimewa Yogyakarta. Skripsi thesis, Universitas Muhammadiyah Surakarta.

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Abstract

Landslides are caused by disturbances in the natural stability of a slope. They can accompany heavy rains or follow droughts, earthquakes, or volcanic eruptions. Mudslides develop when water rapidly accumulates in the ground and results in a surge of water-saturated rock, earth, and debris. This study was conducted in Sleman Regency, Yogyakarta Special Region. Sleman Regency is one ofithe regions in Indonesia which is included in the list of areas prone to landslide disasters. The purpose of this study was to determine the distribution of landslide susceptibility levels in Sleman Regency and to identify the dominant factors that caused landslides in Sleman Regency. The data collection method used in this study was literature study and documentation by collecting secondary data from related agencies, the National Disaster Management Agency (BNPB), BPBD Sleman Regency, the Meteorology, Climatology and Geophysics Agency (BMKG), PVMBG, Universities, and Ministries/ Related Institutions. Based on the results and analysis ofithis study, it can be seen that Sleman Regency is dominated by moderate landslide susceptibility with an area of 49,951.74 hectares (86.73%), high landslide susceptibility with an area of 7,271.30 hectares (12.53%), and low landslide susceptibility with an area of 428.70 Ha (0.74%). The area of moderate landslide susceptibility has a slope of 8-15% (slightly sloping or wavy) to 15-30% (hilly) with a rainfall intensity of 2000-2500 mm/ year and 2500-3000 mm/ year. Land use at a moderate landslide susceptibility level is in the form of shrubs, gardens, settlements, grasses, irrigated rice fields, wet rice fields, and moor. Soil types were dominated by regosol, latosol, kambisol, and grumusol. As well, inseparable volcanic rock formations, andesite, diorite, old volcanic deposits, landslide deposits (ladu), kebobutak formations, and centolo formations. Areas with a high level of landslide susceptibility have a slope that is dominated by a slope of 25-40% (rather steep or mountainous) to above 40% (very steep) with high rainfall intensity of 3000-3500 mm/ year and 3500- 4000 mm/ year. Land use at a high level of landslide susceptibility is in the form of shrubs, forests, gardens, land sand, settlements, grass, irrigated rice fields, rocky soils, and moor. Soil types were dominated by regosol, latosol and cambisol. As well, inseparable volcanic rock formations, kebobbutak formations, and landslide deposits (ladu). Meanwhile, the low landslide susceptibility areas have slopes ranging from 0-3% (flat) to 3-8% (undulating) with a rainfall intensity of 1500-2000 mm/ year. Land use at a low level of landslide susceptibility is in the form of settlements. Soil types were dominated by latosol, kambisol, grumosol, and regosol. As well, inseparable volcanic rock formations, sentolo formations, landslide deposits (ladu), and kebobutak formations.

Item Type:	Karya ilmiah (Skripsi)
Uncontrolled Keywords:	Kerawanan, Longsorlahan, Kabupaten Sleman
Subjects:	G Geography. Anthropology. Recreation > G Geography (General)
Divisions:	Fakultas Geografi > Geografi Fakultas Geografi > Geografi Fakultas Geografi > Geografi
Depositing User:	DIMAS MUHAMMAD YANUAR RAMADHAN
Date Deposited:	14 Aug 2021 06:09
Last Modified:	14 Aug 2021 06:09
URI:	http://eprints.ums.ac.id/id/eprint/93276

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