GIS-Based Landslide Hazard Evaluation and Zonation of Kg. Chas, Kuala Betis, Gua Musang, Kelanta

Abstract

This research entitled GIS-Based Landslide Hazard Zonation and Evaluation of Kg. Chas, Kuala Betis, Gua Musang, Kelantan. The study area is located in Kuala Betis, Gua Musang, Kelantan with the area covered is 25 km2. The aim of this research is to evaluate the landslide causative factors and to produce the landslide hazard zonation map with scale of 1:25000. The method used in generating the landslide hazard zonation map is by using the Geographical Information System (GIS) which is using the Weighted Overlay Method (WOM). The parameters that triggered the occurrence of landslide were analyzed and overlaid in order to generate the landslide hazard zonation map. Digital Elevation Model (DEM) data were used to extract the parameters. Normalized Difference Vegetation Index (NDVI) methods were used to identify the changes of the vegetation and to locate the locations of the past landslides in the study area. The results showed that the landslide hazard zonation map were divided into 5 classes. Class 1 is no hazard, class 2 is low hazard, class 3 is medium hazard, class 4 is high hazard and class 5 is the highest hazard. Based on the landslide hazard zonation map, the study area is covered with a low hazard of landslide and the probability of landslide to occur is low.