The second panel in \autoref{fig:Zelt_Case1_default_fig1.eps} shows the maximum vertical run-up and run-down, normalized by $H$, versus the alongshore coordinate $y$. The maximum runup should agree well with Ozkan \& Kirby (1997), but that the maximum rundown is not represented well in the center of the domain. The ‘wiggles’ in the solid line are evidence of the staircasing of the shoreline: since the shoreline is not treated as a continuous but rather as a discrete function, so is the runup in the individual nodes.