河道平面二维泥沙数学模型

为了研究水库下游河道冲刷及由此而引起的对防洪、航运等造成的影响,本文给出了非均匀沙的平面二维动床数学模型,模型中考虑了悬移质不饱和输移、非均匀沙推移质输移及床沙级配的调整,利用ADI法对水流泥沙方程进行数值离散。利用该模型模拟了葛洲坝下游枝城至枝江河段涨水期淤积和落水期冲刷过程,冲淤量及冲淤部位跟实测值吻合较好。

Numerical Model of Two Dimensional Movable-bed in Rivers

In order to investigate downstream erosions of reservoir and its effects of flood—control and navigation, equations of two dimensional movable—bed numerical model are presented in this paper. The nonequalibrium transport of suspended load, the nonuniform bedboad transport and the sorting of bed material are considered. The model successfully simulates the process of erosion and deposition downstream Gezhouba Dam.