非均匀沙水流挟沙力研究

The Study of Nonuniform Sediment Transport Capacity

本文对平衡输沙和不平衡输沙情况下非均匀沙水流挟沙力规律进行了研究,得到了平衡输沙时非均匀沙分组挟沙力公式及可能挟沙力经验曲线,定性分析了非均匀沙可能挟沙力与均匀沙挟沙力之间的差异。并且探讨了来沙条件对水流挟沙力的影响,提出了非平衡输沙时瞬时挟沙力和有效挟沙力概念及计算方法。

The nonuniform sediment transport capacity in equilibrium and nonequilibrium conditions are studied in this paper. The formula of nonuniform sediment group transport capacity in equilibrium condition and the empirical curve of possible transport capacity are obtained, and the difference between nonuniform sediment possible transport capacity and uniform sediment transport capacity is analysed qualitatively. The influence from upstream sediment condition on downstream sediment transport capacity is studied, and the concept and calculating method of instantaneous and effective transport capacity in nonequilibrium condition are proposed.