Zonation of Landslide Susceptibility using Weight of Evidence (WoE) Method in Tajur Area, Bogor Regency, West Java Province
Rizki Azizah AM (a*), Ilham Alimuddin (a), Agustinus T (a)

a) Geological Engineering, Faculty of Engineering, Hasanuddin University
Perintis Kemerdekaan Km. 10 Street, Makassar, 90245, South Sulawesi, Indonesia
*rizkiazizah21[at]gmail.com

Abstract

Tajur area is one of region that are prone to landslide occurence. This caused by geological conditions are not stable and high rainfall. Administratively, research area included in Citeureup District and Jonggol District, Bogor Regency, West Java Province. Astronomically, research area is located at the coordinates 106,9167 - 106,95 East Longitude and -6,5167 - -6,55 South Latitude. The aims of this research to know geological condition of research area and landslide susceptibility zonation using Weight of Evidence (WoE) method. The geological conditions of research area consists of geomorphology that is hill morphology unit, stratigraphy consists of claystone unit and limestone unit, the structure of research area is Kali Bekasi thrust fault. The parameters which used for analysis the causes of landslide susceptibility are slope, geology, rainfall, soil type, land use, and distance from river. There were 20 landslides were identified in this research area and randomly divided into two groups of modelling/training data sets (55%) and validation/test data sets (45%). The quantitative relationship between each point of landslide and parameters mentioned above was established by WoE in each class. The validation result of WoE method acquired values of AUC were 0,6941 that shows landslide susceptibility model based on the selection of parameters and sufficiency of landslide data have good result. That value reclassified into 4 classes of susceptibility, that are high (41%), medium (4%), low (5%), and very low (50%).

Keywords: geological condition; landslide susceptibility; weight of evidence

Topic: Disaster analysis