<%namespace name="tools" file="tools.tex"/>
<%! import os %>


\textbf{Experiment description}\newline
The storm that hit the Dutch coast in the night between the 2nd and 3rd of February 1976 is classified as a violent storm (‘zeer zware storm’); 11 at the Beaufort scale. A storm event severity that is very rarely experienced in the Netherlands. While the storm surge and high waves impacted the entire Dutch coast, the Delta coast (Zeeland) was hit the hardest with a peak storm surge level of 4.1 m +NAP at Vlissingen: the highest water level since the 1953 storm surge (4.5 m +NAP). The Belgian coast was also impacted heavily, including major flooding in the province of Antwerp. This led to the initiation of the Sigmaplan, designed to better protect the Scheldt basin from flooding during storm surges.

For this validation case the impact of the 1976 storm surge on the northern part of the Dutch coast (the coastal section between Noordwijk and Den Helder) is compared to observations. For the hydraulic boundary conditions, the \citet{VanDerWerf2011} study is used as a starting point. This validation case then focusses more on the morphodynamic comparison between simulated and observed dune erosion and dune retreat, which is available for a set of 30 profiles in the considered coastal section (between profile 568 in the north and profile 7100 in the south, as shown in \autoref{fig:overview_holland1976}). Most profiles have a profile with high dunes, multiple bars up above -9 m NAP and slopes similar to the representative Holland coast profile.

${tools.image(os.path.join(data_path,'Holland1976'), 'overview_holland1976.png', 'Indication of assessed coastal profiles in red, from 568 in the north to 7100 in the south.' ,label='overview_holland1976', width=135)}

The hydraulic boundary conditions are as follows:
\begin{itemize}
	\item The peak surge level consisting of tide and storm surge is 2.99 m +NAP.
	\item The peak significant wave height Hs during the storm is 6.1 meters.
	\item The maximum wave peak period Tp is 10.8 seconds.
\end{itemize}

\textbf{Results}\newline		
The dune erosion volumes and retreat distances at 4m + NAP, based on the measured pre- and post-storm profiles and the XBeach simulations for all 30 profiles are tabulated in \autoref{tab:Holland1976}. To provide some more insight in the results, the pre- and post-storm profiles for profiles 648, 5000 and 7100  are presented in \autoref{fig:Holland1976_raai648}, \autoref{fig:Holland1976_raai5000} and \autoref{fig:Holland1976_raai7100}.

${tools.table('Holland1976/', 'skill.tex', 'Dune erosion volume [$m^3/m$] and retreat distance [m] for the 1976 storm in the XBeach simulation and the measured profiles for the 30 profiles along the northern Dutch coast. The Veromeas of profiles with insufficient measured data is indicated with a NaN. ', 'Holland1976')} 

${tools.image('Holland1976/Raai648', 'BL_BeforeAndAfterStorm_Raai648.eps', 'Cross-section for JarKus profile 648 before and after the 1976 storm based on the measurements and XBeach, including dune erosion volumes and retreat distances.',label='Holland1976_raai648', width=145)}

${tools.image('Holland1976/Raai5000', 'BL_BeforeAndAfterStorm_Raai5000.eps', 'Cross-section for JarKus profile 5000 before and after the 1976 storm based on the measurements and XBeach, including dune erosion volumes and retreat distances.',label='Holland1976_raai5000', width=145)}

${tools.image('Holland1976/Raai7100', 'BL_BeforeAndAfterStorm_Raai7100.eps', 'Cross-section for JarKus profile 7100 before and after the 1976 storm based on the measurements and XBeach, including dune erosion volumes and retreat distances.',label='Holland1976_raai7100', width=145)}