Coastal Modification in Relation to Sea Storm Effects: Application of 3D Remote Sensing Survey in Sanremo Marina (Liguria, NW Italy)

Abstract

Integrated remote sensing techniques, such as photogrammetry from unmanned aerial vehicles (UAV), mobile laser scanners (MLS) and multibeam echosounders (MBES), are particularly effective in detecting and measuring coastal and seabed features and their modifications over time (4D analysis) induced by sea storms. In fact, these techniques allow the production of very high-resolution 3D models, with a continuum between above and below sea level. The present research is focused on the area of Portosole Marina (Sanremo, Western Liguria), affected by a severe sea storm in October 2018 and the following restoration. Two integrated 3D surveys were performed in February 2019 and in November 2019, obtaining accurate and reliable high-definition digital surface models (DSMs) in both emerged and submerged areas. The comparison between the two surveys highlighted volumetric changes in the seabed induced by the sea storm and the effects of a temporary worksite on the emerged and submerged breakwater. In particular, a total deficit of sediments of about 5000 m3 caused an average lowering of about 4 cm over the entire area, concurring with the breakwater instability. This study aims to contribute to the understanding of coastal system resilience within ongoing global climate changes, that is, increasing the intensity of extreme events in the Mediterranean area.

Analysis of Sea Storm Events in the Mediterranean Sea: The Case Study of 28 December 2020 Sea Storm in the Gulf of Naples, Italy

“…The results of the UAS survey provided detailed information on the coastal impact of the storm and a detailed 3D reconstruction of the seawall sector heavily damaged during the event [53]. The 3D topographic data confirmed the occurrence of erosive processes along the seawall during the sea storm resulting in a generalized instability of the calcareous rock blocks at the base of the seawall.…”

Advances in Geoheritage Mapping: Application to Iconic Geomorphological Examples from the Italian Landscape

“…Terracing has deeply modified the geomorphological, vegetation and dwelling landscape at a slope scale. Well-preserved examples of slope terracing are found in the San Fruttuoso catchment [155][156][157].…”

The Imprint of Recent Meteorological Events on Boulder Deposits along the Mediterranean Rocky Coasts

“…Main Objective Exclusion Cause Dominey-Howes et al (2000) [98] process identification CBDs produced by tsunami [99] vulnerability study No CBD dynamics data are reported Andriani and Walsh (2007) [100] process identification No CBD dynamics data are reported Scicchitano et al (2010) [101] process identification No CBD dynamics data are reported Furlani et al (2011) [102] process identification No CBD dynamics data are reported Paris et al (2011) [2] review preface No CBD dynamics data are reported Mastronuzzi and Pignatelli (2012) [103] process identification CBDs produced by tsunami Katz and Mushkin (2013) [104] process identification No CBD dynamics data are reported Mottershead et al (2015) [105] process identification CBDs produced by tsunami Shah-Hosseini et al ( 2016) [106] hazards study No CBD dynamics data are reported Amores et al (2020) [107] storm simulation No CBD dynamics data are reported Ruban (2020) [3] virtual perspective No CBD dynamics data are reported Ferrando et al (2021) [108] process identification No CBD dynamics data are reported Fortelli et al (2021) [109] process identification No CBD dynamics data are reported Lollino et al (2021) [110] process identification No CBD dynamics data are reported…”