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Most numerical studies of sediment transport in the swash zone use depth-averaged models. However, such models still have difficulty predicting transport rates and morphodynamics. Depth-resolving models could give detailed insight in swash processes but have mostly been limited to hydrodynamic predictions. We present a depth-resolving numerical model, based on the Reynolds Averaged Navier-Stokes (RANS) equations, capable of modelling sediment transport and morphodynamics in the swash zone.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/PB8Vs0LJq88

We present a depth-resolving model that is capable of resolving the vertical flow and suspended sediment structures in the surf and in the swash zones. The model uses the RANS equations to simulate hydrodynamics, and includes sediment transport using an advection diffusion approach. The model is first validated hydrodynamically using measured surface elevations. The results from the model show a strong vertical dependence in the suspended sediment flux, and that at certain cross-shore locations the waveaveraged sediment transport moves onshore where the average flow velocity is offshore-directed. These physical processes are important to consider when designing more practical, long-term depth-averaged models for simulating coastal morphodynamics.