Numerical generation of adaptive mesh and preliminary research of numerical simulation of current and silt sedimentation in the Changjiang Estuary

Along with the developrnem of coastal economic bank,the problems of hydrodynamics in estuary area,such as the silting up of waterway,evolution of estuary area,the construction of harbour and the pollution problems,are being brought to one's attention.Numerica simulation method is one of the ideal tools to study such problem.But owing to the complicated shapes of the coastal lines of estuary area and with many islands in the region,it is very difficult to make the discretion of the region of the model.For this reason,the generation method of adaptive mesh is applied to the numerical research of estuary and harbour regions,e.g.,the simulation of hydrodynamic for the Changjiang Estuary and the Hangzhou Bay,Which overcomes,the difficulties of boundary fitting when using regular mesh,and gives raasonable results.