Flood risk assessment for kota tinggi, Johor, Malaysia

Flood risk maps are a vital tool to provide various valuable information for reducing ood damage and spatial planning purposes. Only the ood risk map provides information on consequences of ooding, which can be used as a primary tool to initiate a holistic ood risk management project. Geospatial data such as satellite image and LiDAR data, as well as hydrological data, are used to produce ood risk maps by integrating one and two dimensional hydraulic models. Risk is a production of hazard and vulnerability. Flood risk is expressed as economic loss and a ood risk zone map is produced in both quantitative and qualitative form. ree di­erent depth damage functions were adopted to estimate the ood damage for three di­erent physical elements. e average ood damage for residential areas is RM 350/m2 (USD 95/m2), RM 200/m2 (USD 54/m2) and RM 100/m2 (USD 27/m2) using United States, e Netherlands and Malaysia damage functions. is study successfully produces ood risk but further study is needed for improve the results by taking into consideration epistemic uncertainties and develop a stage damage function tailored to studied area.