河口水流、波浪、潮流、泥沙、河床变形二维数学模型

2 D mathematical model for sediment transport in estuary

根据河口“波浪掀沙，潮流输沙”的泥沙运动机制，引入“波浪幅射应力”反应波浪对水体和泥沙的驱动力．考虑波浪对底部泥沙作用力、波浪对水流挟沙能力的影响及风场对水流和泥沙运动的影响．同时考虑泥沙粒径大小、水体含盐度、含沙量及水流紊动程度等因素对絮凝沉速的影响．用ＡＤＩ算法求解沿水深平均方程，破开算子法解悬移质不平衡输沙方程及河床变形方程，引入通度概念处理岸滩不规则边界，建立河口水流、波浪、潮流、泥沙、河床变形二维数学模型．通过实测资料及卫星摇感图像对所建数学模型进行检验。

A 2 D mathematical model for sediment transport in estuary is established. In the model, a partial cell parameter is introduced for treating irregular boundary and the Alternating Direction Implicit Method(ADI)algorithm is used for calculating the equations of sediment transport. The wind action and the effect of radiation stress of waves on current and sedimentation are taken into account. The computational results are in close agreement with field observation and remote sensing data.