| dc.description.abstract | Landslides are a phenomenon that occurs when soil or rocks on a slope move downward
due to gravity, increased load, or reduced soil binding force. Landslides often occur in
Indonesia due to natural factors such as high rainfall, slopes, fragile rocks, and
earthquakes, as well as human factors. In this study, it is necessary to map the level of
landslide vulnerability by utilizing the Geographic Information System (GIS). The main
objective of the study was mapping the level of landslide vulnerability in Toba Regency by
referring to the Minister of Public Works Regulation No. 22 of 2007. The research
indicators are slope, soil type, rock type, rainfall, slope water system, seismicity, and
vegetation. The research method used is scoring and weighting each indicator and overlay
with the suitability of its geographical location. The results of the analysis of the landslide
vulnerability level map obtained in Toba Regency contained 3 vulnerabilities, namely low
vulnerability class (146,722 km2), medium vulnerability class (597,555 km2), and high
vulnerability class (198,382 km2). The high vulnerability area is dominated by 2 subdistricts,
namely Bonatua, Lunasi and Silaen. The area of vulnerability is dominated by 13
districts, namely Ajibata, Balige, Bor-bor, Habinsaran, Lumban Julu, Nassau, Parmaksian,
Pintu Pohan Meranti, Porsea, Siantar Narumonda, Sigumpar, Tampahan and Uluan. The
low vulnerability area is dominated by 1 sub-district, namely Laguboti. | en_US |
