Landslides susceptibility mapping with kriging in Sendana District of Majene Regency, West Sulawesi M Nur, A Ahmad, B Rasyid
Soil Science Department, Agriculture Faculty of Hasanuddin University, Makassar 90245
Abstract
Until June 2020, BNPB recorded that 330 landslides had occured in Indonesia from the beginning of the year. Majene Regency is one of the areas in West Sulawesi Province that has a high level of susceptibility to the possibility of landslides. One of the steps taken to reduce the impact of the landslides is to delineate the level of landslides susceptibility based on geostatistical data analysis with the kriging method. This research was conducted in Kec. Sendana, Kab. Majene. The sampling method was carried out by field survey, soil data analysis using the Walkley and Black method for c-organic and Hydrometer for soil texture. Susceptibility maps were analyzed with the kriging method. The results of the analysis show that landslides susceptibility in Sendana District is divided into five classes, namely very low (2%), low (12%), moderate (46%), high (39%), and very high (1%). Very high landslides susceptibility is found in the northern part of Sendana District, while for areas with a high level of landslides susceptibility dominantly there are also northern areas of the study area and locally located in the eastern, western and southern parts of the study area. The dominant factors that can affect the occurrence of landslides in Sendana District are rainfall, slopes, structures, and land cover.
