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

The purpose of this simulation is to ensure the multiple sediment fractions model in XBeach performs as expected. In this test, the Deltaflume 2006 T01 test is recreated with two types of sand with different colours, red and blue. The sand is initially placed in a zebra-stripe pattern in the profile. The properties of both types of sand such as the grain size and mobility are the same as the sand used in the Deltaflume experiment. For the test to be successful, the following conditions should be met:

\begin{enumerate}
  \item The simulated final profile should be the same as the final profile in the original Deltaflume 2006 T01 test.
  \item The two sediment types should mix and form layers over each other (yellow).
\end{enumerate}

The figures \autoref{fig:Deltaflume2006_T01_zebra_fig1} and \autoref{fig:Deltaflume2006_T01_zebra_fig2} show the initial and final distribution of red and blue sediment in the profile near the dune face. The red and blue lines in the same figure show the sediment concentration of each sediment type in the water column. If the simulation is successful, the red and blue sediment will be well mixed on the foreshore and fresh blue sediment will be deposited over the red sediment at the dune foot as the dune face retreats. The concentration of blue sediment in the water column should be higher than the concentration of red sediment in the water in areas where only blue sediment is available in the top layer of the bed.
The red line in \autoref{fig:Deltaflume2006_T01_zebra_profiles} shows the predicted dune face retreat and bed level change in the XBeach multiple-sediment model. The black line in the same figure represents the corresponding measured final profile. If the simulation has been successful, the red and black line will align reasonably well. The results of this simulation should be compared to the Deltaflume 2006 T01 test described earlier in this report. 

${tools.image('Deltaflume2006/T01_zebra/', 'fig1.eps', 'Initial bathymetry and sediment distribution')}
${tools.image('Deltaflume2006/T01_zebra/', 'fig2.eps', 'Final bathymetry and sediment distribution')}
${tools.image('Deltaflume2006/T01_zebra/', 'final_profiles.eps', 'Profile development','Deltaflume2006_T01_zebra_profiles')}
