Development of a Rainfall Runoff and Flood Inundation Model for Jakarta, Indonesia,and Its Sensitivity Analysis of Datasets to Flood Inundation

摘要

Floods are one of the major natural disasters in Indonesia. Jakarta experienced several floods almost every year such as 2002, 2007, 2013, 2014, and 2015. In this study, a physically based rainfall-runoff and flood inundation model was developed in order to understand the flood inundation mechanism in Jakarta. A sensitivity analysis of the model was conducted using different model datasets. As the result of analysis, it was found that there are no significant differences between simulation results using 90 m and 5 m DEM resolutions because these finer DEMs were obtained from satellite images and show no big differences in accuracy. We concluded that the radar rainfall and land use/cover conditions are playing important roles in the model in order to reproduce flood inundation situation precisely in Jakarta.