Hindcast of 1st Nov 2006 Storm in the Norderneyer Inlet : wave & Flow boundary conditions

During the 1 November 2006 storm high water levels and high waves occurred both in the Dutch and German parts of the Wadden Sea. Since the geography of the two areas is similar, it is worthwhile investigating whether SWAN can reproduce the wave conditions in the Norderneyer Inlet. FSK Norderney will perform the hindcast study. However, since wave data offshore is not available during the time of the storm, Deltares is given the responsibility of determining the offshore boundary conditions for both the wave model and the flow model, which FSK Norderney will use as input for the hindcast of the tidal inlet. The performed hindcast provides the required offshore boundary conditions for the future wave and flow computations. Where measurements are available, the computed results compare well with the measurements. There are no wave measurements available outside the inlet to validate the hindcasts, but the results seem to be correct in a qualitative sense. One of the findings in this study is that the computed water levels underpredicted the peak of the measured water levels, if 6-hr interval windfields were used. Application of 3-hr interval windfields, obtained from the official 6hr intervals interlaced with predicted 3hr windfields, improved the results dramatically.