Dynamique de la zone de swash : influence de la marée et de la morphologie sur les paramètres du run-up

Abstract

The impact of tide and morphology on run-up parameters in dissipative conditions is assessed, using high-frequency video observations. The infragravity run-up is dominant and shows variations of about 60% during an entire tidal cycle. This behavior cannot be explained by the evolution of offshore wave conditions. Wave conditions in the surf zone and the beach slope are tidally modulated and significantly correlated to the runup. The role of the shape of the beach profile is also investigated.