GNGTS 2019 - Atti del 38° Convegno Nazionale

GNGTS 2019 S essione 2.1 271 The study sites. The study area is located about 30 km south of Siracusa, on the southernmost Ionian coast of Sicily (Fig. 1). We selected the sites to be investigated, according to their morphological setting, i.e. some sites with flat topography, others with gently sloping rocky platform and some others with cliff (Fig. 1b). In particular Calabernardo, Lido di Noto, Eloro beach, Marianelli beach, Vendicari, San Lorenzo and Reitani belong to the municipality of Noto, Marzamemi belongs to the municipality of Pachino, while Morghella is a coastline located between Marzamemi and Portopalo di Capo Passero (Fig. 1b). Close to the Eloro Beach, there is an important Greek archaeological site. Furthermore, the Vendicari Reserve, Pantano Morghella and Marzamemi are classified as Sites of Community Importance (SCI) and Special Protection Areas (SPAs). The area is of particular importance in a tsunami-flooding scenario especially for Civil Protection purposes because it is very densely populated mainly during the summer time. Fig. 1 - A) Simplified geological map of the studied area. Red dashed rectangle shows location of B; B) Coastal types: yellow lines are beach coasts; green lines sloping rocky coasts, red lines cliffs. Method. The estimation of overland inundation and decay is based on the wave equations by Cox and Machemehl (1986) and Noormets et al. (2004). According to these authors, the decay in height of a wave overriding a shore is proportional to the distance X and inversely proportional to wave period T: (1) where H i is the wave height at the distance X i ; R (run-up) is the maximum height of the wave at the breaking point and E is the coast elevation.