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A nonlinear numerical model has been set up by use of Boussinesq Equation with finite differ-ence method,and has been applied to the simulation of the abnormal change of wave height induced by ex-cavated waterway.Numerical results demonstrate that the abnormal change of wave height is due to theadding of the reflected wave height induced by excavated waterway to the incident wave height.Becausethe angle between the incident wave and the axis of the waterway is smaller than the critical angle,the re-flected wave produced by the waterway may propagate to the breakwater and may be added with the inci-dent wave,then the abnormal change of wave height before the breakwater may be caused.So the wave re-flection caused by the change of water depth cannot be neglected.
A nonlinear numerical model has been set up by use of Boussinesq Equation with finite differ-ence method, and has been applied to the simulation of the abnormal change of wave height induced by ex-cavated waterway. Numerical results demonstrate that the abnormal change of wave height is due to theadding of the reflected wave height induced by excavated waterway to the incident wave height.Becausethe angle between the incident wave and the axis of the waterway is smaller than the critical angle, the re-flected wave produced by the waterway may propagate to the breakwater and may be added with the inci-dent wave, then the abnormal change of wave height before the breakwater may be.So the wave re-flection caused by the change of water depth can not be neglected.