Flood risk mapping using economic, environmental and sociadimensions

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2015
Yeğin, Murat
Flood is one of the most destructive natural hazards in Turkey. It is unavoidable but its impacts can be minimized by taking necessary precautions. Flood risk mapping is a developing concept and it is used to determine economically, environmentally and socially risky areas. European Council stipulated the member countries to prepare flood hazard maps showing extents of low, medium and high probability flood events. These maps should also be prepared for Turkey during the European Union harmonization process. For this purpose, this study aims to present a methodology for economic, environmental and social flood risk mapping and its demonstration on a case study. In this study, three risk dimensions (economic, environmental and social) are considered. Water depths are calculated using HEC-RAS while damages and risks are calculated in the ArcGIS environment. Water depths are used to calculate damages for each economic element at risk using depth-damage curves. Two different depth-damage curves from different countries are used in the calculations since depth-damage curves are not available for Turkey. Environmental and social risk maps are developed adapting a binary approach. In addition to this, vulnerability and resilience terms are integrated in these risk calculations. Finally, all three dimensions of risk are aggregated to develop overall risk maps. This procedure is demonstrated on part of Salkım Stream which is located in the Euphrates - Tigris Basin in the southern part of Turkey. Overall risk maps obtained for the study area successfully prioritized areas that require attention in terms of economic, environmental and social flood damages.

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Citation Formats
M. Yeğin, “Flood risk mapping using economic, environmental and sociadimensions,” M.S. - Master of Science, Middle East Technical University, 2015.