The polygonal geometry cartography, in relation to the type of exposed elements considered, in relation to the Po Basin Authority Unit of Management (UoM) (ITN008), represents the risk map of the coastal area and indicates the potential consequences negative effects deriving from the floods expressed in terms of: number of inhabitants potentially affected, economic and social activities insistent on the area, systems that could cause accidental pollution in the event of floods, strategic structures and infrastructures (cemeteries, technological systems, port areas, sports areas , dams, campsites, tourist structures), 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: based on the requirements of Directive 2007/60/EC (art. 6, paragraph 5), it indicates the presence and location of exposed elements within areas with different hazards identified in the hazard maps, divided into some codified categories (population, economic activities, etc); based on the requirements of Legislative Decree 49/2010 (art. 6, paragraph 5), by combining the probability of flooding with the vulnerability to flood phenomena and with the value of the exposed elements, it classifies the territory into 4 risk classes, R1 (moderate or none), R2 (medium), R3 (high), R4 (very high), pursuant to the D.P.C.M. September 29, 1998.
