The Hydrodynamic Numerical Simulation In Complicated Coast And Estuary

Coastal and estuary regions are of great significant to human being, which are closely linked with every aspect of human life and economy. To exploit and make full use of the ocean resource, actions in the coastal and estuary area such as port construction must based on the realization of the environment of this region. Because of the complexity of the coastal and estuary regions, the numerical simulation technique is researched in actual areas for effectiveness; convenience and practicality in engineering. The main works accomplished in this paper are as follows:1. A 2-D tidal flow field mathematical model based on irregular triangular grid finite difference method is set up. A moving-boundary treatment technique is introduced in the mathematical models to deal with shoaling problems, and a new technique which can handle submerged dyke problems based on the irregular triangular grid is also exploited.2. A 2-D tidal field mathematical model taking into account of wave effect is developed, and then the effects of the radiation stress and bottom friction are discussed.3. A 2-D suspend sediment field mathematical model based on irregular triangular grid finite difference method is set up. The discrete scheme of the convection term of the 2-D tidal flow and sediment model in "Technical Regulation of Modeling for tidal-current and sediment on Coast and Estuary" has been developed, adopting "upwind scheme" to discrete the convection term and avoid the false physical effect.4. A 3-D tidal flow field mathematical model based on irregular triangular grid finite difference method is set up. A moving-boundary treatment technique is discussed.