Analisis Tingkat Risiko Bencana Tanah Longsor Berbasis Sistem Informasi Geografis di Kabupaten Karo

Abstract

Indonesia is a country located in an area of volcanic and tectonic activities and between plate boundaries. This leads to the risk of earthquakes and tsunamis triggering landslides. Karo Regency is an area with a large plateau and high rainfall that has the potential for landslides. This research aims to analyze the level of risk of landslides based on Geographic Information System (GIS) which is expected to be useful in mitigating landslides in Karo Regency more effectively. This research is located in Karo Regency which analyzes the level of vulnerability, susceptibility, and capacity of the region using QGIS 3.30.2 application with scoring and overlay techniques referring to Permen PU No. 22/PRT/M/2007 and Regulation of the Head of BNPN No. 2 Year 2012 so as to produce the level of landslide risk which is then validated with ROC curve. Based on the analysis, this research concludes that the landslide risk level in Karo Regency consists of 5 levels, namely very low risk level (636.320 km2), low risk level (506.095 km2), moderate risk level (901.106 km2), high risk level (121.461 km2), and very high risk level (13.284 km2). Karo Regency is dominated by a moderate risk level with a total of 8 out of sub-districts, namely Laubaleng, Tigabinanga, Juhar, Payung, Naman Teran, Dolat Rayat, Merek and Barusjahe subdistricts.