WaveCams Time-Stack: Time stack construction

A coastal monitoring system offers multiple opportunities to observe in detail and with high frequency (10 minutes) the physical processes that take place on the coast. In particular, the WaveCams image acquisition technology allows us to obtain diverse hydrodynamic parameters of high interest in the beach’s dynamics. In the example of this video taken in the famous bay of Etretat in France, we can easily observe how a strong longitudinal current develops in medium wave conditions coming from the NW (waves between 1 and 2 meters). Longshore currents are one of the most powerful driven of sediment transport in the coast, and their predominant direction strongly determines how sediments shrink […]

Beach topography overview

Monitoring of beach topography evolution on any tidal area is made possible by Wavecams technology. It enables to efficiently retrieve not only seasonal erosion or accretion trends, but also high frequency topography evolution (about 2 to 4 weeks) emphasising for example the erosion caused by a storm and the subsequent beach recharge. For example, both quarterly and monthly beach topography evolutions in the center part of Etretat bay have been computed: The effect of major storm events in December 2019 and January 2020 is clearly visible. Beyond this very visual first approach, the characterization of topography evolutions can be quantitatively and precisely done through adapted diagnostics. This will be tackled […]