A GIS MODELLING APPROACH FOR FLOOD HAZARD ASSESSMENT IN PART OF SURAKARTA CITY, INDONESIA

This research is aimed to assess the flood hazard in part of Surakarta using hydrodynamic modelling. Flo2D software is used to simulate the flood for 10, 25 and 100 year return period. The modeling results include two flood parameters, i.e water depth and flow velocity. A comparison was made in flood hazard mapping between single parameter and multi parameters. The multi parameters hazard maps improve the reliability of the hazard class delineation. The impact assessment is done in two point of view, human safety and property damage. The further impact assessment is done by calculating the number of buildings affected by flood