泥沙研究2025，Vol.50Issue(6)：23-29,7.DOI:10.16239/j.cnki.0468-155x.2025.06.004
向家坝水电站下游河道冲淤变化及其影响研究
Research on the scouring and silting changes and their impacts in the river reach downstream of Xiangjiaba Hydropower Station
摘要
Abstract
In response to the issue of clear water release from the Xiangjiaba Hydropower Station,long-term series of hydrological and sediment data as well as cross-sectional topographic data from 2012 to 2023 were used to analyze the characteristics of the downstream riverbed evolution since the impoundment of the Xiangjia-ba Hydropower Station.Subsequently,the impacts of river evolution on the riverbed roughness and water level during the low flow period,as well as the power generation and the navigation of the ship lift were analyzed based on the simulated results by a hydrodynamic numerical model.The results show that the river scouring was concentrated from 2012 to 2017,the riverbed roughness increased from 0.042 in 2012 to 0.051 in 2017,and the water level in the reach decreased significantly.The water levels at the Xiangjiaba Hydrological Station and the Daxuetan Station dropped by about 0.27 m and 0.47 m at most respectively.From 2018 to 2023,and the scouring and downward trend of water level were significantly slowed down,the riverbed roughness re-mained around 0.049.The impact of river channel scouring on the navigation of the ship lift at the Xiangjiaba Hydropower Station is not obvious,and it is generally beneficial to the power generation.关键词
向家坝水电站/河道冲淤/水动力模型/河床糙率/枯水位变化Key words
Xiangjiaba Hydropower Station/scouring and silting/hydrodynamic modeling/riverbed roughness/variation of low water level分类
建筑与水利引用本文复制引用
潘增,陈忠贤,朱俊,周凌,郑川东,封保根..向家坝水电站下游河道冲淤变化及其影响研究[J].泥沙研究,2025,50(6):23-29,7.基金项目
中国长江三峡集团有限公司自主科研项目(BNYG202300648) （BNYG202300648）
