**Acknowledgements**

The LiDAR surveys mentioned in this chapter were carried out within the framework of the interregional project CLAREC (2008–2013) coordinated by the University of Caen (France). The 2017 LiDAR data were provided by the Interregional Coastal Monitoring Network (Réseau d'Observation du Littoral Normandie Hauts-de-France ROL). The photogrammetric survey instruments were acquired, thanks to an equipment grant (BQR) from Université du Littoral Côte d'Opale. Shoreline monitoring and photogrammetric surveys on the coastline east of Dunkirk are carried out within the framework of National Observation Service DYNALIT (www.dynalit.fr). The authors would like to thank Denis Marin for his help in the realization of several figures.
