2022
DOI: 10.3389/feart.2022.829669
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Changes of Divergence and Confluence Relationship Between Dongting Lake and the Yangtze River After the Operation of the Three Gorges Project and Its Impact on the Waterway Depth

Abstract: Human activities and climate change have profoundly changed the hydrological and geomorphological evolutionary processes and trends of rivers and lakes, which, in turn, has affected the utilization of their waterway depth. This study chose the Dongting Lake–Jingjiang confluence of the Changjiang River (Yangtze Rvier), since the operation of the Three Gorges Project, the split ratio of water and the sediment distribution of the three outlets of Dongting Lake—that is, Songzikou, Taipigkou, and Ouchikou—have cont… Show more

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Cited by 13 publications
(11 citation statements)
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“…A mathematical model has predicted that the decrease in the middle‐ and high‐water levels of the Jingjiang reach would be limited to 20 years after the TGP (Y. T. Li et al, 2009); however, the riverbed elevation of the flood channels at the three distributaries would decrease significantly, although the diversion ratio of the three distributaries would not decrease, and the ratio of the current distribution of the three distributaries would not be reduced. The prediction was quite similar to what has ensued (Y. P. Yang, Liu, et al, 2022; Y. P. Yang, Zheng, Zhang, et al, 2022). Under a scenario of the lake volume remaining constant, the reduced outflow from Dongting Lake would be approximately 23% of the water storage capacity of the Three Gorges Reservoir (TGR) (D. D. Zhang et al, 2019).…”
Section: Introductionsupporting
confidence: 83%
“…A mathematical model has predicted that the decrease in the middle‐ and high‐water levels of the Jingjiang reach would be limited to 20 years after the TGP (Y. T. Li et al, 2009); however, the riverbed elevation of the flood channels at the three distributaries would decrease significantly, although the diversion ratio of the three distributaries would not decrease, and the ratio of the current distribution of the three distributaries would not be reduced. The prediction was quite similar to what has ensued (Y. P. Yang, Liu, et al, 2022; Y. P. Yang, Zheng, Zhang, et al, 2022). Under a scenario of the lake volume remaining constant, the reduced outflow from Dongting Lake would be approximately 23% of the water storage capacity of the Three Gorges Reservoir (TGR) (D. D. Zhang et al, 2019).…”
Section: Introductionsupporting
confidence: 83%
“…For example, in the United States, striking increases in vegetation have occurred in the Arkansas River downstream of John Martin Dam (+90%), the Republican River downstream of Trenton Dam (+55%), the Salt Fork River downstream of Arkansas Dam (+33%), the North Canadian River downstream of Canton Dam (+40%), the Platte River downstream of Kingsley Dam, the Canadian River downstream of Sanford Dam, and the Missouri River downstream of Garrison Dam (Johnson et al., 2012; Williams & Wolman, 1984). Nevertheless, other factors not discussed here but which affect water levels require further investigation, including waterway regulation projects (Yan et al., 2019; Yang et al., 2022).…”
Section: Discussionmentioning
confidence: 99%
“…During field observations of the middle reaches of the Yangtze River, the bank in the straight sections exhibited periodic upstream and downstream movements, causing adjustments in the diversion of downstream branches or the alternation of branches, such as the Jiepai reach (Liu et al, 2014). Owing to adjustments in the flow processes during the year, after the Three Gorges Project became operational, the side banks on the convex side of curved reaches eroded and showed a trend of under scouring, such as the Xiongjiazhou-Chenglingji reach, with some sharp bends straightened through scouring to form oxbow lakes (Yang et al, 2022a(Yang et al, , 2022b(Yang et al, , 2023b. In complex branched reaches, frequent scouring of the side banks and the Jiangxin island have deteriorated the river and waterway conditions, such as in the Shashi reach (Zhao et al, 2020;Yang et al, 2021a).…”
Section: Influence Of Water and Sediment Processes On The Evolution O...mentioning
confidence: 99%