Abstract
Natural disasters are a natural phenomenon that can occur at any time causing material and immaterial losses. Sibolangit is one of the subdistricts in the Deli Serdang Regency with relief of sloping hills between 60° – 90° with high rainfall so that the Sibolangit subdistrict has the potential for landslides. Geographic Information System can connect spatial and non-spatial data so that maps and information analysis can be made in a digital form. This study aimed to determine the level of landslide vulnerability in Sibolangit subdistrict, where the data used include types of rocks, types of soil, slope, rainfall, and land use. The analysis used in the study was the Geographic Information System with Puslittanak Modelling 2004. The study results obtained four criteria for landslide vulnerability in Sibolangit subdistrict, namely low landslide-prone areas which were 7 villages (32.65 km2 or 18.84%), moderate landslide-prone areas which were 13 villages (77.93 km2 or 44.96%), high landslide-prone areas which were 8 villages (46.43 km2 or 28.96%), and very high landslide-prone areas which were 2 villages (16.31 km2 or 10.17 %).
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