复式渠槽水沙输移特性研究综述

水流运动特性受边界的影响较大，由于复式渠槽特有的几何特征和边界条件，当发生漫滩流时，水流结构比较复杂，水流特性和泥沙输移规律均不同于单一渠槽。分别对顺直和弯曲复式渠槽漫滩情况下的流速分布、剪切力分布、水流阻力及泥沙输移特性进行归纳和分析。从复式断面形态、滩槽交互区动量交换、推移质泥沙运动特性以及自然因素条件对水沙输移特性的影响4个方面,对复式渠槽水沙输移特性的研究趋势进行了展望。

Review on researches of flow and sediment transport in compound channels

The movement characteristics of flow are influenced by the boundary conditions. Due to the special geometric features and boundary conditions of compound channel, the flow structure would be complicated when the overbank flow occurs, so the characteristics of flow and sediment transport are different from that of single channel. The velocity distribution, shear stress distribution, characteristics of flow resistance and sediment transport in straight and meander compound open channel are summarized and analyzed respectively. The research tendency of flow and sediment transport in compound overbank channel is forecasted in terms of the influence of the compound channel section shape, the momentum exchange in interactive zone of channel and beach, the motion characteristics of bed load and influence of natural conditions on flow and sediment transport characteristics.