Romagna regional basins, coast, risk, polygonal geometry

The polygonal geometry cartography, in relation to the type of exposed elements considered, in relation to the Unit of Management (UoM) of the Romagnoli Rivers Basin Authority (ITR081), represents the risk map of the coastal area and indicates the potential negative consequences deriving from floods expressed in terms of: number of inhabitants potentially affected, economic and social activities insistent on the area, facilities that could cause accidental pollution in case of floods, strategic structures and infrastructures (cemeteries, technological facilities, port areas, sports areas, dams, campsites, tourist facilities), urbanized areas (residential fabric), productive activities (industrial settlements, arable land, crops, bathing establishments), cultural heritage (wooded areas, parks, gardens, natural areas), etc. The risk map developed responds to two different approaches: in accordance with the requirements of Directive 2007/60/EC (Article 6(5)), it indicates the presence and location of the elements exposed within the areas with different flood hazards identified in the hazard maps, divided into some coded categories (population, economic activities, etc.); on the basis of the requirements of Legislative Decree No 49/2010 (Article 6(5)), combining the probability of flooding with the vulnerability to flooding and the value of the elements exposed, classifies the territory into 4 risk classes, R1 (moderate or zero), R2 (medium), R3 (high), R4 (very high), pursuant to the Ministerial Decree of 29 September 1998.