Pemetaan Tingkat Kerentanan Longsor Kecamatan Padang Batung Kabupaten Hulu Sungai Selatan

Abstract

Landslides often occur in areas with topographic conditions such as in the Padang Batung District. Mapping of potential landslide by using extraterrestrial mapping or commonly known as remote sensing. Remote sensing data used in this study are sentinel 2A imagery, TRMM satellite imagery, elevation data from DEMNAS, and soil type maps from the soil and agro-climatic research center (Puslittanak) which are then converted into digital form. Digital data processing using ArcGIS software by combining and analyzing the data obtained using weighted overlay data analysis techniques, by entering data on rainfall, soil types, slopes, land cover, vegetation density levels as variables measuring landslide susceptibility. The results of the research are presented in the form of a map, then the accuracy is measured using the field survey method or map to survey validation, the results of the field survey are calculated using a confusion matrix and get the results with an accuracy rate of 85.714%. The level of landslide vulnerability in Padang Batung District is divided into 5 levels of vulnerability, from this research it is known that an area of 32km2 is at a very low vulnerability level, 81km2 is at a low vulnerability level, 74km2 is at a medium vulnerability level, 21km2 is at a high vulnerability level and 0.269km2 or 269m2 is located very high level of vulnerability, from the total area of 201 km2. Keywords: Landslide, Mapping, Survey