长江科学院院报2024，Vol.41Issue(6)：10-17,35,9.DOI:10.11988/ckyyb.20230070
高洪水期运行水位对三峡水库泥沙淤积的影响
Influence of Operating Water Level on Sediment Deposition in the Three Gorges Reservoir during High Flood Levels
摘要
Abstract
The sediment issue in the Three Gorges Reservoir(TGR)is directly linked to the long-term maintenance of reservoir capacity.In this study we focus on the effects of incoming volumes of and asynchrony between water and sediment as well as operating water levels on sediment peak transport and deposition discharge in the TGR during typical high flood levels using numerical models.The findings indicate that an increase in incoming flood peak hin-ders the reduction of sediment peak ratio at Fuling Station,leading to more sediment transportation in front of the dam.This results in a greater reduction of sediment peak in front of the dam as the operating water level rises.The variable backwater area is more susceptible to the asynchrony between water and sediment movement compared to the perennial backwater area.As incoming-sediment coefficient rises,the proportion of siltation increases with the rise of low water levels.The sediment delivery ratio is minimally impacted by the asynchrony between water and sediment entering the TGR.As flood and sediment peaks increase,the sediment delivery ratio rises and is more re-sponsive to the attenuation caused by rising operating water levels.These findings provide preliminary insights into the effects of natural water and sediment asynchrony,as well as operating water levels,on sediment movement and deposition in the TGR.This information can serve as a basis for optimizing sediment operations in the TGR.关键词
泥沙淤积/高洪水期/沙峰衰减/运行水位/沙峰输移/水库库容/三峡水库Key words
sediment deposition/high flood level period/sediment peak attenuation/operational water level/sedi-ment peak transport/reservoir storage capacity/Three Gorges Reservoir(TGR)分类
建筑与水利引用本文复制引用
张成潇,米博宇,吕超楠,赵汗青,高宇,任实..高洪水期运行水位对三峡水库泥沙淤积的影响[J].长江科学院院报,2024,41(6):10-17,35,9.基金项目
中国长江三峡集团员工科研项目(NBZZ202200375,WWKY-2021-0033) （NBZZ202200375,WWKY-2021-0033）
国家自然科学基金项目(52209083) （52209083）
