The susceptibility indicator of the coast to marine flooding (SI_i) was also calculated by analyzing and crossing, through a weighted spatial analysis, 3 categories of coastal variables: morphological, evolutionary and anthropic, some of which coincide with those used for the erosion susceptibility indicator. A different weight was assigned to each of them, broken down as follows: Morphological Variables 80%, Evolutionary Variables 10%, Anthropic Pressure Variables 10%. SI_i = (Morphological Variable Classes)*8+(Evolutionary Variable Classes) +(Anthropic Pressure Classes). The formula gives values, in a range from 10 to 48, which have been normalized into 5 classes using the Natural Interruptions method (Jenks). The final classes are: Values from 10 to 15 (CLASS 1 - less susceptibility) Values from 16 to 23 (CLASS 2) Values from 24 to 32 (CLASS 3) Values from 33 to 40 (CLASS 4) Values from 41 to 48 (CLASS 5 maximum susceptibility) The Morphological Variables are given by the combination of the parameters: width of the emerged beach free from permanent infrastructures (2014); closing height towards land of the emerged beach (2012); presence of Washover fans; morphological characteristics of the coastal ridge to 2012-2014; Evolutionary variables from recent subsidence alone (2011-2016); Anthropic pressure describes the percentage of anthropization of the coast, calculated in a wide band about 300 m from the shoreline towards the hinterland. All the parameters are calculated along transects perpendicular to the shoreline, parallel to each other and spaced 10 meters apart. The detailed descriptions relating to the analysis procedure and the assessments made can be found in the marine work: 'Coastal susceptibility indicators to erosion and flood phenomena' available online at the following page: https://ambiente.regione.emilia-romagna. en/en/geology/news/news-2019/report-support-mitigation-coastal-risks
