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Article

Connection between Anthropogenic Water Diversion and Hydrodynamic Condition in Plain River Network

by 1,2,3, 1,2, 1,2, 4,*, 1,2 and 1,2
1
Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
2
College of Environment, Hohai University, Nanjing 210098, China
3
Nanjing Institute of Environmental Sciences, MEP, Nanjing 210042, China
4
Jiangsu Academy of Environmental Industry and Technology Corp, Nanjing 210019, China
*
Author to whom correspondence should be addressed.
Academic Editor: Layla Ben Ayed
Water 2021, 13(24), 3596; https://doi.org/10.3390/w13243596
Received: 10 November 2021 / Revised: 6 December 2021 / Accepted: 12 December 2021 / Published: 14 December 2021
(This article belongs to the Topic Emerging Solutions for Water, Sanitation and Hygiene)
The increase in the rate of water renewal driven by hydrodynamics contributes to improving the water quality of the plain river network. Taking the lakeside river network in Wuxi as an example, through numerical simulation, polynomial fitting, correlation analysis, and principal component analysis, the hydrodynamic responses of urban lake-connected river networks to water diversion and hydrodynamic grouping were researched. Based on numerical model and influence weight analysis, we explored the improvement of hydrodynamic conditions of plain river network with strong human intervention and high algal water diversion. The results showed that: (1) The relationship between water diversion impact on river network flow velocity and water diversion flux was not as simple a linear relationship. It could be reflected by polynomial. The water transfer interval in dry season with high hydrodynamic efficiency (HE) was lower than 10 m3/s and higher than 30 m3/s, and the HE increased significantly when the water transfer flow was higher than 20 m3/s in the wet season. (2) According to the main hydrodynamic driving factors, the channels in the river network could be divided into three types: water conservancy projects, river and lake water level difference, and river channel characteristic. The correlations of rivers’ flow velocity in each group were very high. (3) The influence weights of water conservancy projects, river and lake water level difference, and river channel characteristic on the whole river network dynamics were 65, 21, and 12.4%, respectively, and the other factors contributed 1.6% of the weight. View Full-Text
Keywords: lake-connected river network; hydrodynamics force; influence weight; water diversion; 2-D hydrodynamic numerical model lake-connected river network; hydrodynamics force; influence weight; water diversion; 2-D hydrodynamic numerical model
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MDPI and ACS Style

Wang, H.; Shen, Z.; Zeng, Y.; Yan, H.; Li, Y.; Yuan, W. Connection between Anthropogenic Water Diversion and Hydrodynamic Condition in Plain River Network. Water 2021, 13, 3596. https://doi.org/10.3390/w13243596

AMA Style

Wang H, Shen Z, Zeng Y, Yan H, Li Y, Yuan W. Connection between Anthropogenic Water Diversion and Hydrodynamic Condition in Plain River Network. Water. 2021; 13(24):3596. https://doi.org/10.3390/w13243596

Chicago/Turabian Style

Wang, Hua, Zilin Shen, Yichuan Zeng, Huaiyu Yan, Yiping Li, and Weihao Yuan. 2021. "Connection between Anthropogenic Water Diversion and Hydrodynamic Condition in Plain River Network" Water 13, no. 24: 3596. https://doi.org/10.3390/w13243596

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