Numerical And Experiment Simulation Of Sediment In Tidal Estuary Area With Hydraulic Engineering

With the social and economic development, people pay more attention to the estuary's management and exploitation. In order to make full use of the estuary, such as navigate, flood control and aquiculture, natural estuary is usually adjusted according to the improvement. Hydraulic engineering usually change the natural river by floodgate and dam, which will increase the sediment and inflect the terrain and environment. It's significant to analysis and study the influence of hydraulic engineering on the sediment of estuary, which will protect and make full use of the natural estuary.The thesis studied the influence of dam on the sediment of near estuary, based on the Jinqing estuary. The distribution and time history of sediment were simulated. The key researches are following:(1) According to the hydrological datum and theoretical analysis, the 2-Dnumerical model was established to simulate the fluid field and sediment pattern of natural estuary area.(2) According to the simulation of fluid field, the distribution and develop process were analyzed. The result shows that the sediment was developed in three years, and then sediment gradual become slowly.(3) A test model with scale 1:40 was established to simulate the distribution and time history of sediment. The experiment proves the numerical result.(4) Through the experiment, river erosion and deposition was discussed and analyzed, and three kinds test result of deposition and erosion in river were presented.