GIS-Based Multi-criteria Approach Towards Sustainability of Flood-Susceptible Areas in Giofiros River Basin, Greece

This paper describes an approach for the identification of flood-susceptible areas contributing to sustainability these in Giofiros river basin covering area 184 km2, located Southern Greece. is prone flooding with devastating consequences on people, environment, and economy. In this context, a geographic information system (GIS)–based multi-criteria decision analysis (MCDA) method potential flood-prone at scale initially presented. Upstream very high flood–susceptible simulated point selected, which outlet created subbasin (169 km2). area, hydrological conducted based unit hydrograph (UH) theory simulating rainfall-runoff process. The UH calculated by applying three different methods: time-area diagram into GIS Soil Conservation Service (SCS) UH, Snyder synthetic UH. results show that two last methods underestimate flood peak relation method. completed through Hydrologic Modeling System (HEC-HMS) software from hydrographs are produced. using imported River Analysis (HEC-RAS) order hydraulic simulation be performed. output resulted hazard mapping maximum depth velocity along section mainstream downstream point. appear extremely useful preventing disaster making mitigation plans.