长江科学院院报2025，Vol.42Issue(4)：10-18,9.DOI:10.11988/ckyyb.20240095
长江下游芜裕河段近期演变规律及其影响因素分析
Recent Evolutionary Process and Influencing Factors in Wuhu-Yuxi Reach of Lower Yangtze River
摘要
Abstract
The Wuhu-Yuxi reach,one of the vital links between cities in the Yangtze River Delta urban area,is lo-cated in the lower reaches of Yangtze River.Understanding the evolution of the Wuhu-Yuxi reach under new hydro-sedimentary conditions provides theoretical support for future flood control and river regulation.Observed field data for the Wuhu-Yuxi reach was analyzed to understand the altered flow-sediment regime and erosion-deposition fea-tures after the operation of the Three Gorges Reservoir(TGR).Results reveal that the Wuhu-Yuxi reach has re-mained generally stable.The riverbed is mainly subject to scouring,with the heads of sandbars eroded and retrea-ting.Erosion on convex banks and deposition on concave banks have emerged in the sharp-bend section and the multi-braided section due to the development of the right sub-branch of upstream Qianzhou bar upstream which leads to an increased diversion ratio,and the mainstream chute cutoff resulted from the prolonged duration of medi-um-low water levels.Short sub-branches have also developed in the multi-braided section because the diversion ratio of the left sub-branch in the multi-braided section of Chenjiazhou bar has increased,which in turn intensifies the scouring of the Chenjie and Caojie waterways.关键词
河床演变/凸冲凹淤/短支汊发展/因素分析/三峡水库运行/分流比/长江下游河段/芜裕河段Key words
bed evolution/erosion on convex bank and deposition on concave bank/development of sub-branches/factor analysis/operation of TGR/diversion ratio/river channel of lower Yangtze River/Wuhu-Yuxi reach分类
建筑与水利引用本文复制引用
渠庚,孙天印,何子灿,栾华龙,郝婕妤..长江下游芜裕河段近期演变规律及其影响因素分析[J].长江科学院院报,2025,42(4):10-18,9.基金项目
长江水科学研究联合基金项目(U2240224,U2240206) （U2240224,U2240206）
中央级公益性院所长基金项目(CKSF2023328/HL,CKSF2023343/HL) （CKSF2023328/HL,CKSF2023343/HL）
湖北省自然科学基金项目(2021CFB146) （2021CFB146）
