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

In \citet{Arcilla1994} two types of profiles and three different dynamic states are investigated: near-equillibrium, erosive and accretive. Also, a test with extreme erosive conditions is performed. In this section the erosive and accretive tests for the first profile are discussed: test 1B and 1C. The two tests are intended to simulate the erosive effects during a storm and the restoring effects afterwards. A clear dune front is absent in the profile used, only a gently sloping beach is present. In \autoref{tab:experiments_LIP} the conditions of these two tests are summarized. 

\begin{table}[H]
  \caption{Overview of experiments}
  \label{tab:experiments_LIP}
  \begin{center}
    \begin{tabular}{lllll}
      \hline
      Experiment & $H_{m0}$ & $T_p$ & Water level & Duration \\ 
      \hline
      1B         & 1.4m     & 5s    & 4.1m        & 18h      \\ 
      1C         & 0.6m     & 8s    & 4.1m        & 13h      \\ 
      \hline
    \end{tabular}
  \end{center}
\end{table}



In \autoref{fig:deltaflumelip11d_1b_morpho} and \autoref{fig:deltaflumelip11d_1c_morpho} the computed and measured morphodynamics are shown. 

${tools.image('DeltaflumeLIP11D/1B/', 'final_profiles.png', 'Morphodynamics during test 1B', 'deltaflumelip11d_1b_morpho')}
${tools.image('DeltaflumeLIP11D/1C/', 'final_profiles.png', 'Morphodynamics during test 1C', 'deltaflumelip11d_1c_morpho')}
\end{comment}



% if interpret:

The hydrodynamics are very well predicted by XBeach for both tests. However, the morphological response is not. In the first, erosive test a steep dune front develops compared to the measurements. The eroded sediment settles just in front of this newly created dune front. It seems that the avalanching routine governs the dry parts of the profile too much. Possibly, the results are better in case the dry slope setting for the avalanching routine is decreased. A similar problem is visible in the second, accretive test.

Another characteristic in the profile is not well predicted as well: the bar. In the erosive test, some bar development is visible, but the development lags behind considerably compared to the measurements. In the accretive test, the considerable accretion of the bar is not predicted at all.

XBeach seems to show too much erosive behavior in mild near-equilibrium or accretive conditions and mildly sloped profiles without careful calibration of the avalanching slopes.

% endif