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悬沙运动方程及其近底泥沙通量是不平衡输沙研究的关键问题之一.从给出二维悬沙运动方程的推导出发,阐明近底泥沙通量的物理本质为悬沙运动方程的底部边界条件.分析研究了常用的挟沙力和切应力方法的内在联系,指出从物理意义和形式上两者的一致性,从理论上统一了挟沙力和切应力两种方法.同时在对近底泥沙通量表达式比较分析的基础上,总结了几个需要关注的问题,为研究和解决悬沙运动及近底水沙交换问题提供了一种解决思路.
The suspended sediment transport equation and its near-end sediment flux are one of the key problems in the study of unbalanced sediment transport. Starting from the derivation of two-dimensional suspended sediment transport equations, the physical essence of sediment flux near the sediment is described as suspended sediment The boundary condition of the bottom of the equation of motion is analyzed.The intrinsic relationship between the sediment-carrying force and the shear stress method is analyzed and analyzed. It is pointed out that the two methods of sediment-carrying capacity and shear stress are uniformed theoretically from the consistency of both physical meaning and form At the same time, based on the comparative analysis of the sediment flux at the near bottom, several problems needing attention are summarized, which provides a solution to the research and solution of the suspended sediment transport and the exchange of water and sediment near the bottom.