Perubahan Penggunaan Lahan Lokasi Bencana Longsor di Desa Bongkaras Kecamatan Silima Pungga – Pungga Kabupaten Dairi

Abstract

Landslides are one of the natural disasters that generally occur in mountainous areas. North Sumatra Province is one of the areas prone to disasters, including landslides. The steep topography that dominates several districts in North Sumatra is a natural condition that has the potential for landslides. Bonkaras Village is one of the villages affected by the landslide that occurred in 2018 which is estimated to be the main cause of steep slope conditions and high levels of rainfall as well as indications of changes in forest land use into agricultural land. The purpose of this study was to identify the types of land use and to analyze changes in land use before and after the landslide disaster in Bonkaras Village. This study uses a manual interpretation of image classification based on KLHK guidelines (2020) and uses the transition matrix method of land use change. The results of this study indicate that the types of land use in the village of Bonkaras there are as many as 9 classes of land use, namely landslides, forests, roads, oil palm plantations, open land, settlements, mixed gardens, rice fields, and shrubs and changes in land use before the landslide disaster. it is known that forest land use decreased by 1.18 ha, and shrubs decreased by 2.93 ha, mixed gardens 3.60 hectares, dry land agriculture 3.16 rice fields 2.63 hectares, while after the landslide, it was found that forest land use decreased by 0.59 Ha, mixed gardens 0.76 Ha, rice fields 1.83 Ha, shrubs 0.53 Ha, and landslide area of 3.48 Ha. The existence of land conversion activities that occurred in the village of Bongkras from forest to gambier fields is suspected to have triggered a landslide disaster.