Satellite observations of storm erosion and recovery of the Ebro Delta coastline, NE Spain

• DOI: 10.1016/j.coastaleng.2023.104451
• Publication Date: 2023-12-30T07:31:07Z
• Authors: C. Cabezas-Rabadán; J.E. Pardo-Pascual; J. Palomar-Vázquez; A. Roch-Talens; J. Guillén
• Keywords: Coastal erosion; River delta

Storms and extremely energetic events may significantly impact the form structure of beaches, so cause erosive processes coastal damages. Efficient management actions require an updated accurate knowledge morphological changes occurred to being shoreline position a good indicator them. This work proposes use open-source SAET software for definition satellite-derived shorelines (SDSs) from L8 Sentinel-2 imagery reveal on beaches Ebro Delta. Spatial-temporal models (STMs) enable characterisation how responded storms 2020. In conjunction with wave data, STMs analysis response storm events, as well monitoring their subsequent recovery in short medium term (<1 year). Results show Storm Gloria (January 2020, Hs max = 7.62 m) acted disruptive event shifting point trend. As that storm, major along delta caused average retreat 47 m. A progressive during spring summer was mainly associated periods low energy. Nevertheless, by end year complete had been achieved about half coast, while other showed erosion more than 10 m when compared pre-storm situation. Both took place unevenly different sections probably dependent factors such orientation beach pattern longitudinal sediment transport coast.