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Numerical Simulation and Analysis to Tidal Currents and Wave Field of Pearl River

A hydrodynamic model (MOCOE) is used in tidal current and wave calculation in Yamen river, which is one of the eight estuaries of Pearl River. The method of combining curvilinear orthogonal coordinates in the horizontal direction with Sigma mapping coordinates in the vertical direction is used in calculation of the tidal current. In order to consider the nonlinear effect of wave and the reflection induced by the island, a Hyperbolic Mild Slope Equation with an improved nonlinear dispersion is introduced. It shows that the numerical results are in good agreement with the field data. A conclusion is that this model can be applied to coastal engineering and estuaries