人民黄河2025，Vol.47Issue(5)：34-39,6.DOI:10.3969/j.issn.1000-1379.2025.05.006
水沙变化条件下黄河下游游荡段稳定性研究
Study on the Wandering Reach Stability of the Lower Yellow River Under the Condition of Water and Sediment Change
摘要
Abstract
The river regime of the wandering reach of the Lower Yellow River changes violently.Studying its stability is of great significance for the regulation of the lower reaches of the river channel.The variation process of wandering intensity in wandering reach from 1986 to 2020 and its influencing factors were investigated by analyzing the measured data and then the wandering reach stability was predicted by the one-dimensional water and sediment mathematical model under the different sediment scenarios of 300,600 and 800 million tons with considering Guxian Reservoir constructed or not in the future.It finds out that the lateral and vertical wandering intensity of the braided reach considera-bly decreases since the operation of Xiaolangdi Reservoir while there is a slight increase in vertical wandering intensity from 2018 to 2020 be-cause of the large amount of sediment discharged by the Xiaolangdi Reservoir.And the lateral wandering intensity of the wandering reach shows an upward trend with the increase of bankfull width and shows a downward trend with the bankfull water depth increasing.What's more,Guxian Reservoir can maintain a certain scale of normal water channel in the wandering reach for a long time and significantly promote the comprehensive stability coefficient of the wandering reach compared without the Guxian Reservoir.Under the scenarios of 600 million and 800 million tons of incoming sediment,the time for the comprehensive stability coefficient to be greater than 25 is extended by 24 and 25 years respectively.Under the scenario of 300 million tons of incoming sediment,the comprehensive stability coefficient can be maintained greater than 0.030 for a long time.关键词
游荡段/游荡强度/稳定系数/黄河下游Key words
wandering reach/wandering intensity/stability index/Lower Yellow River分类
水利科学引用本文复制引用
赵翔,李达,刘威,朱呈浩,崔振华..水沙变化条件下黄河下游游荡段稳定性研究[J].人民黄河,2025,47(5):34-39,6.基金项目
国家重点研发计划项目(2023YFC3208605) （2023YFC3208605）
中国博士后科学基金资助项目(2022M721300) （2022M721300）
国家自然科学基金资助项目(52379068) （52379068）
