Numerical Simulation Of The Tidal Current And Engineering Sediment In Terminal Domain

According to the dredging problem of wharf extending engineering for Qinhuangdao port, this paper used the depth-integrated shallow water equations and the finite difference method to set up a numerical model for tidal current and sediment transport in the port domain.In order to verify the applicability and accuracy of the model, the numerical results are compared by available observation ones. Comparing results shown that calculation data agree well with observation ones. This means that the numerical model is able to provide reasonable results and works well.On the basis verification, the numerical model is used to simulate the flow field with a background that the engineering is finished. In order to reveal the effects induced by the engineering, the numerical results are compared with those obtained from the case without engineering. It shows that the flow field changes little in flow direction and velocity.For considering sedimentary pollution problem caused by extending engineering for the original structure, another numerical model is also established to deal with the sediment transportation employing the shallow water and diffusion equations. Based on a series of numerical calculations, this paper gives out reasonable analysis and predictions for the sediment pollution and movement. Furthermore, the stability of coastal area is also studied. The numerical results shown that the engineering construction could not make the suspended sediments settle in the port seriously and have little influence on the stability of the coast and foreshore.In a word, the following conclusions can be obtained from the studies of this thesis:(1) The numerical models proposed in this paper include the flow model and the sediment transportation model; they are valid and can present reliable predictions for the situations in the current engineering.(2) The engineering constructions conducted in Qinhuangdao port have little influence on the flow field and sediment transportation.(3) The numerical results of this thesis provide an important suggestion for the successful engineering design and construction.