三峡水库不同调蓄方式对枝城至杨家垴河段冲淤变化的影响  

Impacts of Different Operation Rules for Three Gorges Reservoir on the River Reach from Zhicheng to Yangjianao

作　　者：王洁 

机构地区：[1]长江勘测规划设计研究有限责任公司施工处,湖北武汉430010

出　　处：《中国农村水利水电》2018年第1期46-50,共5页China Rural Water and Hydropower

摘　　要：三峡水库蓄水后,长江中游枝城-杨家垴河段发生了自上而下的剧烈冲刷。但是三峡水库不同调蓄方式对该河段冲淤变化的影响尚不清楚,而且现有的研究手段都具有一定的局限性。采用二维水沙数学模型,系统而全面地研究了三峡水库不同调蓄方式对于长江中游枝城-杨家垴河段河床冲淤变化的影响。研究发现,在现有的调蓄方式下,河床变形以全局冲刷为主,并且预计10年末河道地形接近冲刷极限地形,河道将基本保持稳定状态;在不同中小洪水调度方式下,河道处于整体冲刷的趋势定性上一致,仅在定量略有差异。Since the impoundment of Three Gorges Reservoir,the river reach from Zhicheng to Yangjianao have suffered from severe erosion.However,it remains unclear how different operation rules for Three Gorges Reservoir affect the erosion and deposition of this river reach.Employing the two-dimensional depth-averaged model for fluvial processes,the present paper systematically investigates the impacts of distinct operation rules for Three Gorges Reservoir on the river reach from Zhicheng to Yangjianao. The results show that under the current operation rule,the river bed is mainly demonstrated to be eroded. It is also estimated that in the 10 years,the river geomorphology will remain stable as the erosion depth of river bed will be close to its limit depth. Although appreciable discrepancies of bed deformations due to different operation rules can be spotted,the river bed exclusively suffer from erosion.

关 键 词：三峡水库 调蓄方式 枝城至杨家垴河段 二维水沙数学模型 河床冲淤 

分 类 号：TV8[水利工程—水利水电工程]