人民长江2024，Vol.55Issue(1)：14-20,7.DOI:10.16232/j.cnki.1001-4179.2024.01.003
水沙变化条件下不同边界弯曲河道演变特征研究
Evolution characteristics of curved river channels with different boundaries under water-sediment variation conditions
摘要
Abstract
The curved river channel has a tortuous shape and dynamic characteristics of meandering and creeping.Its formation,development and evolution are complex processes affected by many factors.In order to study the evolution characteristics of curved river channels under water-sediment variation,the natural model method was used to create a relatively natural curved river channel in an indoor flume,and the model test was carried out under two working conditions of whether implementing riverbank protection measures or not.The results showed that under riverbank protection measures,the upstream of the longitudinal section was scoured and cut down,the downstream section didn't change much,the thalweg curvature of the river decreased,and its evolu-tion response characteristics were more sensitive to the variation of sediment concentration.For no riverbank protection measures,the evolution and adjustment of the river channel was strong,and the longitudinal section was integrally incised with larger magni-tude at downstream section than that at the upstream section,the thalweg curvature of the river channel gradually increased,and its evolution response characteristics was more sensitive to flow variation.The essence of the curved river channel evolution was the process of mutual adaptation between the water-sediment variation and the river channel morphology adjustment.The final trend of the evolution was that the morphological structure of the river channel and the water-sediment conditions reach a balanced state of mutual coordination.关键词
弯曲河道/水沙变化/河道演变/自然模型/护岸措施Key words
curved river channel/water-sediment variation/channel evolution/natural model/riverbank protection measures分类
建筑与水利引用本文复制引用
陈羿名,渠庚,郑承太,胡呈维,栾华龙..水沙变化条件下不同边界弯曲河道演变特征研究[J].人民长江,2024,55(1):14-20,7.基金项目
国家自然科学基金项目(51679011,51309022) （51679011,51309022）
长江水科学研究联合基金项目(U2240224,U2240206) （U2240224,U2240206）
