汉江下游长低水历时航道整治水位确定方法

南水北调中线一期工程调水后,丹江口枢纽坝下河段来水来沙过程将发生较大变化,低水历时大幅延长,中水流量及历时大幅减少,来沙量减少,现有整治水位的确定方法不能适用于调水后的新的水沙过程。通过研究,提出采用"有效时段输沙能力法"确定整治水位,并已将成果应用于汉江下游兴隆至岳口段航道整治工程设计。

Determining method of regulation stage of waterways downstream Hanjiang river with long-lasting low discharge

With the implementation of the middle route of the South North Water Transfer Project,incoming water and sediment process in the downstream waterway of the Hanjiang river will change significantly.Low discharge will last longer,the rate and duration of middle discharge will reduce,and the amount of sediment will decrease.The existing method for determining the regulation stage cannot be applied to the new water and sediment conditions.A new method for calculating the regulation stage is promoted,and the results are applied to the waterway regulation works in Xinglong Yuekou reach in the downstream of the Hanjiang river.