SENSITIVITY OF FLOW DEPTH INUNDATION BASED ON THE MICRO-SCALE TOPOGRAPHY IN KRUKUT RIVER, JAKARTA, INDONESIA

There is a great progress in modeling advances and the great increasing in the computational resources in recent years. However, nowadays it is feasible to perform 2-D urban flood simulations at very high spatial resolutions and to conduct the flood risk assessments based on the topography. In this study, the sensitivity of flood loss estimation is obtained in such micro-scale analyses to the spatial representation of the buildings in the 2D flood inundation model and distribution flood based on the topography. The results show that topography has a limited effect on the exposure values (i.e. the number of elements at risk), but it can have a significant impact on the hazard values that attributes to the DEM data.