In conclusion, the shoreline boundary condition agrees well with the analytical solutions for the longshore uniform case but shows some discrepancies for the case of a concave beach, which can be attributed to the ``staircase'' discretization of the shoreline. The above results are consistent with the results obtained with the SHORECIRC model which is based on similar hydrodynamic equations, see Van Dongeren and Svendsen (1997), and show that also the current model is capable of representing run-up and run-down. \"{O}zkan-Haller, H.T. and J.T. Kirby (1997). \emph{A Fourier-Chebyshev collocation method for the shallow water equations including shoreline runup.} Applied Ocean Research, 19, pp. 21-34. Zelt, J.A. (1986). \emph{Tsunamis: the response of harbours with sloping boundaries to long wave excitation}. Doctoral dissertation, Rep. No. KH-R-47, W.M. Keck Laboratory of Hydraulics and Water Resources, Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, 318 p.