ABSTRACT
This chapter simulates the sediment movement and calculates and forecasts the sedimentation in various port areas with the two-dimensional mathematical model of wave, current and sediment movement. The mathematical models used this time include the wind-wave model, tidal current model, sediment model and waterway siltation model, and it is considered that the land boundary does not generate waves, and incident wave can be absorbed without generating wave, the open boundary conditions of the medium model and small model are given in the form of spectra by the calculation result of the upper layer model. Moreover, the calculated and measured value at each measuring point are basically the same and the changes of tide level, current velocity and current direction are also basically consistent, and the velocity of tidal current increases with increase of water depth, the velocity of flood tide is greater than that of falling tide and the velocity of tidal current at the time of spring tide is greater than that at the time of neap tide.
