根据适合大范围缓变地形情况下 ,不恒定、非均匀流场中随机波折绕射联合数值模式及波浪作用下的二维浅水环流方程和悬沙扩散方程 ,建立了波浪、潮流共同作用下二维悬沙数学模型 ,并将该模型应用于渤海湾北部海域 ,进行了波、流共同作用下航道疏浚弃土的悬沙扩散、运移及海床演变的数值模拟 ,为工程单位决策提供科学依据 According to the numerical model of stochastical twists and turns and the two-dimensional shallow circulation equation and the suspended sediment diffusion equation, which are suitable for a wide range of slowly changing terrain, under unsteady and nonuniform flow fields, Dimensional mathematical model of suspended sediment and the model is applied to the northern Bohai Sea area. The suspended sediment diffusion, migration and seabed evolution numerical simulation of waterway dredging under the combined action of waves and currents are carried out to provide science for engineering unit decision-making in accordance with