Advances on coastal erosion assessment from satellite earth observations: exploring the use of Sentinel products along with very high resolution sensors Paula Gomes da Silva University of Cantabria, Spain Anne-Laure Beck ARGANS, France Jara Martinez Sanchez University of Cantabria, Spain Raúl Medina Santanmaria University of Cantabria, Spain Martin Jones ARGANS, United Kingdom Amine Taji ARGANS, France This is a section of Eighth International Symposium “Monitoring of Mediterranean Coastal Areas. Problems and Measurement Techniques”(DOI: 10.36253/978-88-5518-147-1) by Donatella Carboni, Laura Bonora, Matteo De Vincenzi Firenze University Press Firenze 2020 https://doi.org/10.36253/978-88-5518-147-1.41

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This work proposes the use of automatic co-registered satellite images to obtain large, high frequency and highly accurate shorelines time series. High resolution images are used to co-register Landsat and Sentinel-2 images. 90% of the co-registered images presented vertical and horizontal shift lower than 3 m. Satellite derived shorelines presented errors lower than mission’s precision. A discussion is presented on the applicability of those shorelines through an application to Tordera Delta (Spain).

 Tordera Delta Optical imaging satellites Co-registration Spatial accuracy Shoreline detection Coastal Change

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