This Note is one of a series documenting experiments conducted to resolve questions about the accuracy of two-dimensional models, the consequences of certain of their assumptions, and the adequacy of the numerical approximation procedures. The author describes six experiments with a model of the Eastern Scheldt that indicate that tidal amplifications of the semi-diurnal tide in the model are too large during the spring tide and too small during neap tide. Thus the Manning's [n] value for the bottom stress is not a constant but depends on the tidal range. Generally, decreasing the timestep gives better agreement in amplification and phase lag for all tide conditions.
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