MORPHODYNAMIC OF BEACH SCARPS ON A MACROTIDAL COAST DURING HIGH WATER LEVEL EVENTS (NORMANDY, FRANCE)

Although there are numerous studies on the morphology and physical processes affecting the dune's scarp and many conceptual models describing beach scarps on microtidal and mesotidal environments (Sunamura, 1985a ; Short, 1999), really quantitative informations about the beach scarp formation is lacking, especially along tidal environments where the tide controls the level of wave attack. However, Sherman and Nordstrom (1985) give a qualitative description of beach scarp formations and evolution based on field observations but without data set.