Flood Directive Implemantation Methodology at Different Scales: Preliminary Results

In the frame of the application of 2007/60 flood directive in Italy, regional and basin authorities are presently carrying out activities concerning the implementation of risk maps, over the entire national territory. Basing on the different methodologies proposed in literature and by government agencies to calculate flood risk, a methodology is here proposed and applied in the Orco and Dora Riparia watershed basins. The methodology relies on available data, freeware software, free on-line documentation. It shows to be applicable on different scales, from the watershed scale to that of urban districts. Preliminary results are encouraging, as the methodology shows to robust, can be implemented in reasonable times and with less economical expenses. The risk index shows to be also relevant for decision making, especially when different options have to be compared.