The H�num tidal basin is part of the North Frisian Wadden Sea and is located between the islands of Sylt and F�r. Part of the H�num tidal basin is a reference area for monitoring the undisturbed development of the Wadden Sea.
Objectives:
Hindcast currents and waves in the H�num tidal basin for a real-time period of 4 complete years (1996-1999); grid size is 100 m.
Quantify the impact (bed shear stress, generated by the combined action of currents and waves) on the sea bottom of the H�num tidal basin.
Identify characteristic numbers which describe the impact of currents and waves on the sea bottom adequately. "Adequately" means: the spatial distribution of a characteristic number correlates well with the spatial distribution of sediments and/or benthos in the H�num tidal basin. A simple characteristic number could be the "4 years temporal mean of the bed shear stress" minus the "threshold bed shear stress for sediment erosion".
Methods:
"Wind, currents and waves are calculated simultaneously with a coupled numerical model, with the components "MKW" for wind, "TRIM" for currents and "k-model" for waves.
Field measurements in the Hoernum tidal basin for the validation of model results:
wave radar station WAMOS, positioned on land at Hoernum.
