Intervento di ripascimento protetto lungo la costa di Riccione–Misano Adriatico

Coastal areas are a highly dynamic environment where intertwined hydrological and geomorphological processes influence the shoreline both morphologically and sedimentological. Among the various challenges to be addressed, when it comes to coastal defence, erosion is one of the most significant, especially in highly populated and climate-vulnerable areas. This thesis focuses on the coastal defence of a beach in Emilia-Romagna, Misano Adriatico, an area characterized by a low-lying beach affected by coastal erosion. For years, this coast has always been the object of defence, in fact over the years both rigid and soft works (barriers, brushes and repairs) have been implemented. This study aims to evaluate the effectiveness of different coastal defence works using one-dimensional modelling of XBeach software. A transect characteristic of the Misano Adriatico beach, identified with the code 29L5, was taken into consideration to be able to analyse the response of the beach profile under extreme conditions generated by Scirocco and Bora winds. Four scenarios were analysed: natural profile without works, profile using only a submerged barrier, profile using only beach nourishment, and profile using beach nourishment and a submerged barrier. The results were evaluated using three indicators: shoreline, sedimentary budget and overflow rate. The simulation results led to the observation that the combined beach nourishment configuration with a submerged barrier is the most effective in protecting the coast. In addition to this thesis, the possibility of using bivalve mollusc shells to fill the bags of submerged barriers was evaluated, focusing on nature-based strategies.