A novel type equilibrium slope model for swash zone sediment transport rates

Cross-shore sediment transport remains difficult to predict for practical engineering models. One of the challenging regions for such models is the swash zone, where many models use so-called distribution methods to predict the sediment transport rates from the last point of the hydrodynamic and sediment transport models to the point of maximum run-up (van Rijn, 2009). Other types of models for swash zone transport rates have been developed, and many of these are build on a so-called equilibrium slope (see e.g. Chen et al., 2024). Both the distribution type models, and the equilibrium slope type models have, however, only been tested on a limited range of scenarios, and it is not known how well they perform across a wide range of wave conditions with a wide range of initial cross-shore profile shapes and sediment characteristics.