支流入汇对汉江中下游的影响

Influence of inflow of anabranches on middle-lower reaches of the Hanjiang River

在实测资料和前人研究的基础上研究了支流入汇对汉江中下游水沙条件、河床演变以及河流功能维持的影响. 支流的沿程汇入改变了干流的水沙条件,包括流量、流量过程、含沙量及来沙过程. 支流入汇和河岸、河底侵蚀一起,是影响下游河床演变、维持河道功能的重要因素. 南水北调中线工程实施后,支流入汇对汉江中下游的重要性更趋凸现,配合南水北调工程对支流进行适当的综合规划治理可兴利除害.

Based on field data and former researches, influence of inflow of anabranches on middle and lower reaches of the Hanjiang River was analyzed. Both discharge, discharge process, sediment concentration and sediment process changed with the continuous inflow of anabranches down the river. Inflow of anabranches together with the erosion of riverbank and riverbed is important to the evolution and the sustainable function in middle-lower reaches of the Hanjiang River. After the implementation of Middle Route of South-to-North Water Transfer Project, the influence of anabranches will be more important; systematical control may benefit both the enhance of advantages and the decrease of disadvantages.