Analysis of Landslide Prone Areas as the Basis for Landslide Disaster Mitigation in Bungbulang District of Garut Regency

Abstract

Landslides are natural disasters that often result in property losses, fatalities and damage to public facilities. This research aims to map landslide-prone locations and determine mitigation strategies that are appropriate to the conditions of the region at the research site. The parameters used to determine landslide prone areas refer to the standards that have been set by Puslitanak Bogor, namely, rainfall, slope slopes, land use, geological structures, and soil types. Overlay, scoring, weighting, and classification methods are carried out on all five parameters by utilizing software based on Geographic Information Systems (GIS). Landslide distribution point with a very high category of land movement is found in all villages in Bungbulang District with an overall area of ±218 ha but there are five villages that have a very large threat of loss to the economy and even fatalities including Bojong Village, Mekarbakti Village, Cihikeu Village, Mekarjaya Village and Wangun Jaya Village. Based on the map of the spread of landslide potential that has been made, a structural mitigation strategy is needed in the form of building a ground retaining wall (TPT) in Bojong Village which is at the coordinate point utm X 789824,828282 Y 9175193,14279, Mekarbakti Village with coordinate point UTM X 788411.150969 Y 9178084,18717, Mekarjaya Village with coordinate point UTM X 784761.725735 Y 9175112.74001, relocation of residents' settlements in Wangun jaya Village with utm X coordinate point X 781667.425142 Y 9177593.35493, and the transfer of land functions in Cihikeu Village with coordinate point UTM X 786159.83242 Y 9177593.35493, as well as by improving maintenance of existing infrastructure infrastructure. Education to the community is also very necessary in maintaining and improving the carrying capacity of the environment, so as to create a resilient and ready society for disaster threats.