Analyzing the spatiotemporal evolution law of the wandering channel in the lower Yellow River, which provides theoretical support and practical value for further understanding of the characteristics of the channel evolution in the lower Yellow River. Based on the systematic collection and arrangement of river regime observation data of typical sections of the wandering channel in the lower Yellow River from 1960 to 2015, with the Mann-Kendall trend test and Fisher breakpoint test method, the average river width and the migration rate of the main line of the wandering channel in the lower Yellow River from 1960 to 2015 were analyzed. The results show that in the past 60 years, the wandering channel in the lower Yellow River shows a clear manifestation. The expansion and contraction segments appear alternately, that is, they are distributed in the shape of a lotus on the plane, while the temporal and spatial distribution of the main line adjustment rate is not significant; the cross section of the lower Yellow River is the key node of the plane lotus-shaped distribution, the whole river channel is divided into three sections. The first reach, Tiexie—Yudian section, with the average river width of 1627m; the second reach, Yudian—Chanfang section, with the average river width of 1477m; the third reach, Chanfang—Gaocun section, with the average river width of 1074m. The study clearly shows the overall evolution of the river regime in the wandering section of the lower Yellow River in the past 60 years.
国家重点研发计划（2018YFC0407403）；国家自然科学基金资助项目(51709123)；中央级公益性科研院所基本科研业务费项目(HKY-JBYW-2018-03)Funds: National Natural Science Foundation of China for Youths (51709123); Special Basic Research Fund for Central Public Research Institutes (HKY-JBYW-2018-03)