<%namespace name="tools" file="tools.tex"/>
\textbf{Experiment description}\newline
The purpose of research programme GWK98 was to improve the methods of design and performance assessment of beach nourishments. In total 24 tests were performed in the wave flume in Hannover (Grosse Wellen Kanal) in the period of November 1996 till August 1997.

These tests were not carried out with an initial profile similar to the Dutch reference profile, nor with hydraulic conditions characteristic for the Dutch coast. Scale factors or steepness factors can therefore not be determined in a similar way as in the research programmes in The Netherlands in the 1980’s. We assumed wave-height scaling with respect to super-storm conditions for the Dutch coast (wave-height of 9 m), which resulted in a scale of 1:8. In total 8 series of tests were performed with different initial profiles with and without supporting structures. Imposed wave heights for all tests was 1.16 m (estimated as 9 m on prototype scale), with a wave period of 6.4 s (corresponding to 18 s on prototype scale). In total 5 tests without structures are incorporated in the skillbed, which have a dune-type cross-shore profile and hydraulic conditions large enough to cause significant erosion. First order wave steering was applied, and ARC compensation was present.

\textbf{Results}\newline
The profile development is shown in \autoref{fig:GWK98_A9_A9_BOI_profiles} to \autoref{fig:GWK98_H2_H2_BOI_profiles}. The results for the indicators for different moments in time are shown in \autoref{tab:GWK98_A9_indicator} to \autoref{tab:GWK98_H2_indicator}. Note that the profile measurements do not show a clear dune retreat. Therefore, the dune retreat is not included in shown tables.


${tools.image('GWK98/A9/', 'A9_BOI_profiles.eps', 'Comparisons of profiles from experiment A9 for different moments in time. Observed profiles are shown with a dashed line and the XBeach profiles with a solid line. The storm surge level is shown with a black dashed line.',width=150)}
${tools.table('GWK98/A9/', 'indicator.tex', 'Indicators for A9',small=True)}
${tools.image('GWK98/A9/', 'A9_BOI_errorTime.eps', 'Temporal development of the relative error for the three indicators.')}

${tools.image('GWK98/B2/', 'B2_BOI_profiles.eps', 'Comparisons of profiles from experiment B2 for different moments in time. Observed profiles are shown with a dashed line and the XBeach profiles with a solid line. The storm surge level is shown with a black dashed line.',width=150)}
${tools.table('GWK98/B2/', 'indicator.tex', 'Indicators for B2',small=True)}
${tools.image('GWK98/B2/', 'B2_BOI_errorTime.eps', 'Temporal development of the relative error for the three indicators.')}


${tools.image('GWK98/C2/', 'C2_BOI_profiles.eps', 'Comparisons of profiles from experiment C2 for different moments in time. Observed profiles are shown with a dashed line and the XBeach profiles with a solid line. The storm surge level is shown with a black dashed line.',width=150)}
${tools.table('GWK98/C2/', 'indicator.tex', 'Indicators for C2',small=True)}
${tools.image('GWK98/C2/', 'C2_BOI_errorTime.eps', 'Temporal development of the relative error for the three indicators.')}

${tools.image('GWK98/F1/', 'F1_BOI_profiles.eps', 'Comparisons of profiles from experiment F1 for different moments in time. Observed profiles are shown with a dashed line and the XBeach profiles with a solid line. The storm surge level is shown with a black dashed line.',width=150)}
${tools.table('GWK98/F1/', 'indicator.tex', 'Indicators for F1',small=True)}
${tools.image('GWK98/F1/', 'F1_BOI_errorTime.eps', 'Temporal development of the relative error for the three indicators.')}

${tools.image('GWK98/H2/', 'H2_BOI_profiles.eps', 'Comparisons of profiles from experiment H2 for different moments in time. Observed profiles are shown with a dashed line and the XBeach profiles with a solid line. The storm surge level is shown with a black dashed line.',width=150)}
${tools.table('GWK98/H2/', 'indicator.tex', 'Indicators for H2',small=True)}
${tools.image('GWK98/H2/', 'H2_BOI_errorTime.eps', 'Temporal development of the relative error for the three indicators.')}


\textbf{Overview}\newline
An overview of the statistical scores is shown in \autoref{fig:GWKoverview} and \autoref{tab:gwk98_overview}. Note that dune retreat is not shown and that only the errors in dune erosion volume and berm slope are shown.

${tools.image('GWK98/', 'overview.eps', 'GWK overview', 'GWKoverview')}

${tools.table('GWK98/', 'skill.tex', 'Statistical scores for Grosse Wellen Kanal 1998 experiments', 'gwk98_overview')} 