Analisis Kerawanan Longsorlahan di Kabupaten Wonogiri Berdasarkan Sistem Informasi Geografis

Rohma, Istika and , Dr. Annisa Trisnia Sasmi, S.Si., M.T. (2026) Analisis Kerawanan Longsorlahan di Kabupaten Wonogiri Berdasarkan Sistem Informasi Geografis. Skripsi thesis, Universitas Muhammadiyah Surakarta.

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Abstract

Landslides are processes involving the downslope movement of soil and/or rock masses due to slope instability. Wonogiri Regency exhibits diverse topographic, rainfall, geological, land-use, and soil characteristics, resulting in varying levels of landslide susceptibility across the region. This study aims to analyze the spatial distribution of landslide susceptibility levels and their correspondence with actual landslide occurrences in Wonogiri Regency. A quantitative method was employed using a Geographic Information System (GIS) approach via the Weighted Overlay method. The parameters utilized included rainfall, slope gradient, geology, land use, and soil type. Each parameter was assigned a score and weight, followed by an overlay process to generate a landslide susceptibility map. Validation was conducted using 85 landslide occurrence points from 2025, obtained from the Wonogiri Regency Regional Disaster Management Agency (BPBD), with 12 of these points verified through field surveys. The results indicate that landslide susceptibility is categorized into four classes: low, moderate, high, and very high. The moderate susceptibility class covers the largest area. Validation results show that 57 occurrence points (67.06%) fall within the high susceptibility class, while 28 points (32.94%) fall within the moderate susceptibility class; no occurrence points were found in the low susceptibility class. These findings demonstrate that actual landslides occurred more frequently in areas classified as having high susceptibility compared to those with moderate susceptibility.

Item Type:	Thesis (Skripsi)
Uncontrolled Keywords:	Landslide, Landslide Susceptibility, Weighted Overlay, GIS, Wonogiri.
Subjects:	G Geography. Anthropology. Recreation > G Geography (General) G Geography. Anthropology. Recreation > GE Environmental Sciences > Natural disasters
Divisions:	Fakultas Geografi > S1 Geografi
Depositing User:	ISTIKA ROHMA
Date Deposited:	19 Aug 2026 03:27
Last Modified:	19 Aug 2026 03:27
URI:	http://eprints.ums.ac.id/id/eprint/148264

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