长江科学院院报2024，Vol.41Issue(7)：175-181,7.DOI:10.11988/ckyyb.20231359
新水沙条件下荆江河段洲滩演变特征及其影响因素
Characteristics and Influence Factors of Sandbar Evolution in Jingjiang Reach of the Yangtze River under New Water and Sediment Conditions
摘要
Abstract
The impoundment of the Three Gorges Project(TGP)has altered water and sediment transport dynamics in the downstream channel.Based on series hydrological and river channel topography data,we analyze the evolution of major sandbars and discuss the underlying mechanisms in the Jingjiang River reach after TGP impoundment.Our findings reveal several key points:1)In the two decades since TGP impoundment,suspended load significantly de-creased in the Jingjiang River reach,leading to observable riverbed erosion and retreat of most sandbars,particular-ly those near the mainstream.2)In major bifurcations,most branches deposited,with individual branches expan-ding.3)Changes in water and sediment downstream of the TGP primarily influenced the retreat of sandbars.4)Human activities,such as river sand excavation and channel regulation projects,have impacted branch evolution in the Jingjiang River in recent years.5)Due to ongoing alterations in water and sediment,sandbars are expected to continue their current evolutionary trends over an extended period.关键词
三峡工程/荆江河段/洲滩/演变特征/影响因素Key words
Three Gorges Project/Jingjiang River/sandbars/evolution characteristics/influencing factors分类
建筑与水利引用本文复制引用
段光磊,彭严波..新水沙条件下荆江河段洲滩演变特征及其影响因素[J].长江科学院院报,2024,41(7):175-181,7.基金项目
国家重点研发计划项目(2022YFC3201801,2023YFC3209504) （2022YFC3201801,2023YFC3209504）
国家自然科学基金长江水科学研究联合基金项目(U2040215) （U2040215）
