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对于粉沙淤泥质河口和海岸，海底泥沙受潮流作用主要以悬沙形式输运。在这样的海区建港与疏浚航道，需要首先进行泥沙淤积问题的研究。本文采用潮流作用下不平衡方程式、挟沙能力公式和起动流速公式，建立了潮流作用下河口悬沙运动二维数学模型，在对二维悬沙不平衡输沙方程和海底变形方程进行离散时直接采用显式迎风格式，得到了较好的结果。在此基础上，将该模型应用于实际水域，结果表明，该数学模型能够模拟河口的悬沙运动规律和冲淤变化，对于水流较大的海域该模型有一定的应用价值
For the silt silt estuary and the coast, the seabed sediment is affected by the tidal current mainly in the form of suspended sediment transport. In such a sea area to build a port and dredge waterway, it is necessary to carry out sediment deposition research. In this paper, the two-dimensional mathematical model of the sediment movement under the tidal current is established by using the equations of unbalanced equation, sediment carrying capacity and flow velocity under the tidal current. When the two-dimensional suspended sediment transport equation and the submarine deformation equation are discretized Directly using the explicit wind format, get better results. Based on this, the model is applied to the actual water area. The results show that the mathematical model can simulate the law of sediment movement and the change of scouring and silting in the estuary, which has certain value for the model with large water flow