The implementation and testing of the SANTOSS sand transport model in Delft3D

This study aims to assess and improve the way Delft3D models wave-driven cross-shore sand transport. This is done by implementing and testing the SANTOSS near bed transport model using reliable data from full-scale wave flume experiments. The Delft3D assessment was done by modelling an erosive and accretive case of the LIP experiment. This shows that the modelling results with the SANTOSS model are promising for the accretive case and the erosive case offshore of the breaker bar, and better then when using the current state-of-the-art Van Rijn (2007ab) transport model. The transport rates in the erosive case onshore of the breaker bar were not well predicted with the SANTOSS model and the Van Rijn (2007ab) model does better here. The SANTOSS model in Delft3D can be improved by making the combination of the SANTOSS near bed transport model and the current related suspended transport model of Van Rijn (2007b) more consistent by determining the suspended transport above the wave boundary layer. An improvement for the SANTOSS model would be to implement the effects of turbulence due to breaking waves.