Landslide Inventory: Challenge for Landslide Hazard Assessment in Indonesia

Landslide occurs almost every year in Indonesia which causes tremendous damages to life and properties. Landslide hazard map would allow the identification of hazard regions for the implementation of mitigation which can minimize the loss of human life and property from future landslide occurrences. Currently, the Indonesian Government and research entities as well as academic institutions are trying to develop landslide hazard assessment model for the prone area to support prevention program, mitigation action, and evacuation plan. However, there is a lack of attention in the landslide inventory mapping as a basic input of landslide hazard mapping. Ideally, landslide inventory mapping provides detailed information about the spatiotemporal distribution of landslide occurrence. It contains the date of occurrence, types, failure mechanisms, area/volume, depth, and so on. Landslide inventory map can be prepared by several methods such as image interpretation, remote sensing techniques, detailed geomorphological fieldwork, historical archive studies, interview, and combination among several methods. The aim of this paper is to review the possibility of using various methods of inventory in Indonesia. Furthermore, this paper is also purposed to explore the use of existing landslide database for producing a landslide inventory that can be used to assess landslide hazard.