Assessment of Flash Flood Vulnerability Index in a tropical watershed region: a case study in Ciliwung Hulu watershed, Indonesia

Flash floods, an unpredicted swift climatological disaster, frequently occur in Indonesia. However,there are limited vulnerability assessments, especially in urban and vital regions such as Bogor District. Thestudy aims to assess the vulnerability index of Ciliwung Hulu Watersheds as one of the most susceptible areasin the district. Flash flood vulnerability index (FFVI) is selected to be calculated as the indicator. Data wereobtained from the official government offices and processed using the FFVI formula referring to the work of Nasiri et al., (2019) and Perka BNPB No. 2/ 2012 and then mapped using ArcGIS 10.3. The results and themaps show that the study area is categorized as highly to very highly vulnerable to flash flood disasters. Theattained results help facilitate the governance interplay processes in building a more disaster-readymanagement plan and to construct a more resilient society.