一种新的河道—维水流泥沙运动数值模拟方法

A New One-Dimensional Numerical Modeling Method of River Flow and Sedimentation

本文对悬移质挟沙力、床沙级配变化方程、泥沙运动差分方程组求解等问题进行了较深入的研究,提出了合理、有效的处理方法,建立了既可计算非均匀悬移质不饱和输沙,又可计算非均匀推移质输移的一维全沙模型.模型计算结果与实测资料吻合较好.将所建模型用于研究三峡工程变动回水区泥沙问题,取得了一定成果.

Problems about suspended load transport capacity, the variation equations of bed material gradation and the solution of sediment transport difference equations etc. are researched in this paper. Some rational and valid methods are adopted to deal with these problems, and an one-dimensional sediment mathematical model is established to calculate the non-equilibrium transport of nonuniform suspended load and the transport of nonuniform bed load. The calculated results by this model are well agreement with field data. The model is used to research the sediment problems in fluctuating backwater region of the Three-Gorge Project.