It is concluded that profile evolution and dune erosion during test T01 are favourably simulated. Also simulated wave heights, flows, sediment concentrations and sediment transports compare reasonably well with measurements. However, looking at the results in more detail some discrepancies are found:
1. The long wave height and especially associated long wave orbital flows are underestimated.
2. The test and depth averaged flow between x = 170 m and x = 200 m is underestimated. Close to the shoreline no reliable measurements are available to verify the model results. 
3. The simulated sediment concentration compares well with measurements close to the dune face. However, for smaller sediment concentrations in deeper water the simulated concentration is underestimated.
4. The offshore sediment transport is mainly driven by the short wave and roller induced undertow whereas the offshore directed long wave related sediment transport cancels out with the onshore sediment transport due to nonlinear short waves.
It is remarked that shoreward of the maximum offshore sediment transport, the importance of the long wave related transport increases and eventually becomes dominant in relation to the transport associated with short wave and roller driven undertow. Considering the mainly long wave associated sediment transport in proximity of the dune face and the importance of long wave run-up for avalanching it is expected that long waves are mainly responsible for the swash zone sediment transport.
Abdelrahman, S.M. and Thornton, E.B., 1987. Changes in the short wave amplitude and wavenumber due to presence of infragravity waves, Proceedings of Specialty Conference on Coastal Hydrodynamics, pp. 458-478.
Roelvink, J.A. and Stive, M.J.F., 1989. Bar-generating cross-shore flow mechanisms on a beach. Journal of Geophysical Research, 94(C4): 4785-4800.
Van Gent, M.R.A., Van Thiel de Vries, J.S.M., Coeveld, E.M., De Vroeg, J.H. and Van de Graaff, J., 2008. Large-scale dune erosion tests to study the influence of wave periods. Coastal Engineering, 55(12): 1041-1051.
Van Thiel de Vries, J.S.M., 2009. Dune erosion during storm surges. PhD Thesis, Delft University of Technology, Delft, The Netherlands.