Implementing landslide susceptibility map at watershed scale of Lompobattang mountain South Sulawesi, Indonesia

Abstract

Landslides represent a serious hazard, particularly in the mountainous area currently. This recent study attempts to predict future landslide occurrence at watershed scale and to calculate the potency of mass movements for each sub-watershed at Lompobatang Mountain. In order to produce landslide susceptibility map (LSM) using the statistical model, we identified landslide inventories that occurred in the past, and predicted the prospective future landslide occurrence by correlating it with causal factors. In this study, six parameters were used namely, distance from fault, slope, aspect, curvature, distance from river and land use. This research proposed the Weight of Evidence (WoE) model to produce a landslide susceptibility map. Success and predictive rate were also used to evaluate the accuracy by using Area Under Curve (AUC) of Receiver Operating Characteristic (ROC). The result would be useful for land use planner and decision makers, in order to devise a strategy for disaster mitigation.