Regional flood-risk mapping and its use in land-use planning: the Region of Valencia case study

One of the key points in coping with floods is to develop a proper land-use plan of the area of interest, to reduce future risks. Flood risk at a given point is the statistical integration of the product of its flood hazard and its flood vulnerability. The spatial evaluation of the present and future flood risk in the Valencia area (Spain) was obtained using a GIS, and also its aggregation at different scales. The study proposed 415 urban measures in 175 municipalities. Most of these measures are partially based in five flood risk indicators at municipal scale. For each indicator all the municipalities are sorted out into four categories, based on the mean and the standard deviation of the indicator. Urban measures are mainly considered for the two highest categories.