A combined numerical tidal model for the Hangzhou Bay and Qiantang River

In order to avoid prescribing open boundary condition on the upstream side of the Hangzhou Bay, in numerical simulation of the tides and residual currents of the Bay, a 1-D model for the Qiantang River is connected to the 2-D model for the Hangzhou Bay.The harmonic constants of diurnal constituent[(K₁+O₁)/2], semidiurnal constituent (M₂) and shallow water constituent (M₄) are obtained.The results produced by the combined model are in better agreement with the observed ones than those produced solely by the original 2-D model.The combined model gives much more reliable results for tide-induced residual water level and current.