The susceptibility of landslide zone using weight of evidence method in nagari tanjung sani and nagari sungai batang, west sumatera

Abstract

Landslides naturally occur to create slope stability, especially in mountainous areas. Disaster management is needed to minimize the impact of losses incurred. Management of landslide is formed based on knowledge of characteristics, types, and processes of disaster occurrence. Map of landslide susceptibility was one of that. This research aims to determine and analyze the type, landslide density based on event control factors, and zonation of susceptibility. The method used was the statistical method of Weight of Evidence (WOE) and field observation. The results showed that Nagari Sungai Batang has a translational and rotational type of landslide with a medium density of landslide and medium susceptibility of landslide. Nagari Tanjung Sani has landslide type rockfall and topple with a high density of landslide and highest susceptibility. Based on these conditions there were some differences in type, the controlling factor, and susceptibility of landslide degree, although they were formed from the same geomorphological process as Caldera shape by Andesit Maninjau Formation.