长江科学院院报2016，Vol.33Issue(10)：1-5,11,6.DOI:10.11988/ckyyb.20150725
三峡工程运用后宜枝河段平滩流量调整特点
Characteristics of Adjustment in Reach-scale Bankfull Discharge of Yichang-Zhicheng Reach after the TGP Operation
摘要
Abstract
A sharp reduction in sediment load has caused a significant process of channel degradation along the Yichang-Zhicheng Reach after the operation of the Three Gorges Project (TGP), especially in the adjustment of flood discharging capacity.In view of the complicated cross-sectional profiles and the great longitudinal variability in flood discharging capacity, the reach-scale bankfull discharges in the reaches of Yichang and Yidu from 2002 to 2013 were estimated using a combination of geometric average and weighted average method .The effect of channel erosion and deposition on the reach -scale bankfull discharge in each reach was investigated .In addition, empirical relationships were established between the reach -scale bankfull discharge and the previous five -year average fluvial erosion intensity during flood seasons for these two reaches , and it was found that bankful discharge increased with erosion, and decreased with deposition; the correlation between bankful discharge and flow intensity in Yichang was 0.64, whereas in Yidu it was 0.94, indicating that the response of bankfull discharge to the altered flow and sedi -ment regime in the Yidu reach was more remarkable than that in the Yichang reach .关键词
三峡工程/水沙条件/河床冲淤/河段平滩流量/宜枝河段Key words
Three Gorges Project/flow and sediment regime/channel erosion and deposition/reach-scale bankfull discharge/Yichang-Zhicheng Reach分类
建筑与水利引用本文复制引用
周美蓉,夏军强,邓珊珊,许全喜..三峡工程运用后宜枝河段平滩流量调整特点[J].长江科学院院报,2016,33(10):1-5,11,6.基金项目
国家自然科学基金项目（51579186，51339001）；国家重点研发计划课题 （）
