Dune Development Dominates Flow Resistance Increase in a Large Dammed River
Abstract Dunes are important for bedload transport in almost all large river systems and exert an important control flow resistance. Investigating dunes is fundamental for simulating discharge, sediment transport, and flood routing. However, the spatiotemporal dynamics of dunes and flow resistance r...
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| Format: | Article |
| Language: | English |
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Wiley
2024-04-01
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| Series: | Water Resources Research |
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| Online Access: | https://doi.org/10.1029/2023WR036660 |
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| author | Yong Hu Dongfeng Li Jinyun Deng Yao Yue Junxiong Zhou Chunrui Yang Ninghui Zheng Yitian Li |
| author_facet | Yong Hu Dongfeng Li Jinyun Deng Yao Yue Junxiong Zhou Chunrui Yang Ninghui Zheng Yitian Li |
| author_sort | Yong Hu |
| collection | DOAJ |
| description | Abstract Dunes are important for bedload transport in almost all large river systems and exert an important control flow resistance. Investigating dunes is fundamental for simulating discharge, sediment transport, and flood routing. However, the spatiotemporal dynamics of dunes and flow resistance remain poorly understood in large alluvial river systems mainly due to the lack of high‐resolution data. Here we analyzed in‐field observed data on annual profiles of 450 cross‐sections, river bathymetry, discharge, water levels, and sediment in the Middle Yangtze River, and found that dunes developed and flow resistance increased (+10%) in the post‐Three Gorges Dam period. We ascertain that the development of dunes plays the dominant role in augmenting flow resistance, as evidenced by roughness height change (+29%) using a modified Van Rijn method. Ultimately, dune development was incorporated into a hydrogeomorphic numerical model of the Yangtze River to improve flow resistance quantification, and thus, the water level simulation. Our findings highlight the potential increase in flow resistance in response to upstream damming in large rivers and have important implications for flood management and riverine ecology. |
| format | Article |
| id | doaj-art-4ff1d71a2d824a04af96c27e6589d6fd |
| institution | DOAJ |
| issn | 0043-1397 1944-7973 |
| language | English |
| publishDate | 2024-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Water Resources Research |
| spelling | doaj-art-4ff1d71a2d824a04af96c27e6589d6fd2025-08-20T03:22:22ZengWileyWater Resources Research0043-13971944-79732024-04-01604n/an/a10.1029/2023WR036660Dune Development Dominates Flow Resistance Increase in a Large Dammed RiverYong Hu0Dongfeng Li1Jinyun Deng2Yao Yue3Junxiong Zhou4Chunrui Yang5Ninghui Zheng6Yitian Li7State Key Laboratory of Water Resources Engineering and Management Wuhan University Wuhan ChinaKey Laboratory for Water and Sediment Sciences College of Environmental Sciences and Engineering Ministry of Education Peking University Beijing ChinaState Key Laboratory of Water Resources Engineering and Management Wuhan University Wuhan ChinaState Key Laboratory of Water Resources Engineering and Management Wuhan University Wuhan ChinaDepartment of Bioproducts and Biosystems Engineering University of Minnesota Twin Cities Saint Paul MN USAState Key Laboratory of Water Resources Engineering and Management Wuhan University Wuhan ChinaChang Jiang Waterway Survey and Design Institute (Wuhan) Co., LTD Wuhan ChinaState Key Laboratory of Water Resources Engineering and Management Wuhan University Wuhan ChinaAbstract Dunes are important for bedload transport in almost all large river systems and exert an important control flow resistance. Investigating dunes is fundamental for simulating discharge, sediment transport, and flood routing. However, the spatiotemporal dynamics of dunes and flow resistance remain poorly understood in large alluvial river systems mainly due to the lack of high‐resolution data. Here we analyzed in‐field observed data on annual profiles of 450 cross‐sections, river bathymetry, discharge, water levels, and sediment in the Middle Yangtze River, and found that dunes developed and flow resistance increased (+10%) in the post‐Three Gorges Dam period. We ascertain that the development of dunes plays the dominant role in augmenting flow resistance, as evidenced by roughness height change (+29%) using a modified Van Rijn method. Ultimately, dune development was incorporated into a hydrogeomorphic numerical model of the Yangtze River to improve flow resistance quantification, and thus, the water level simulation. Our findings highlight the potential increase in flow resistance in response to upstream damming in large rivers and have important implications for flood management and riverine ecology.https://doi.org/10.1029/2023WR036660flow resistancedunesnumerical modeldammingYangtze River |
| spellingShingle | Yong Hu Dongfeng Li Jinyun Deng Yao Yue Junxiong Zhou Chunrui Yang Ninghui Zheng Yitian Li Dune Development Dominates Flow Resistance Increase in a Large Dammed River Water Resources Research flow resistance dunes numerical model damming Yangtze River |
| title | Dune Development Dominates Flow Resistance Increase in a Large Dammed River |
| title_full | Dune Development Dominates Flow Resistance Increase in a Large Dammed River |
| title_fullStr | Dune Development Dominates Flow Resistance Increase in a Large Dammed River |
| title_full_unstemmed | Dune Development Dominates Flow Resistance Increase in a Large Dammed River |
| title_short | Dune Development Dominates Flow Resistance Increase in a Large Dammed River |
| title_sort | dune development dominates flow resistance increase in a large dammed river |
| topic | flow resistance dunes numerical model damming Yangtze River |
| url | https://doi.org/10.1029/2023WR036660 |
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