The Minjiang River, a typical tidal channel in Southeast China, plays an important role in the supply of drinking water, flood control and drought relief, farming and navigation, as well as shipping and other functions. Dissolved oxygen (DO), as a basic living condition for aquatic biota, has been deteriorating in the Minjiang River in recent years. In order to understand how the spatial distribution of DO responds to river discharge, nutrient loading and water temperature, a three-dimensional Environmental Fluid Dynamics Code model was used to simulate water age and the distribution of DO in the Minjiang River. The model presented in this paper was used for water resource and water quality simulations under various physical, chemical, and biological scenarios. Sensitivity simulation results indicated that the three factors had a significant impact on the spatial distribution variation of DO in the Minjiang River. Increased river discharge or split ratio of the North Channel resulted in decreased water age and increased DO. Increased nutrient loading and water temperature caused lower DO. In order to protect coastal environments in the Minjiang River, river discharge should be increased and pollutants of local cities should be reduced during the high temperature and drought period.
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Research Article|
February 25 2016
Analysis and numerical simulation of natural and human-caused low dissolved oxygen in the Minjiang River Estuary
Peng Zhang;
Peng Zhang
1College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
2Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education, Hohai University, Nanjing 210098, China
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Yong Pang;
1College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
2Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education, Hohai University, Nanjing 210098, China
E-mail: [email protected]
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Chengchun Shi;
Chengchun Shi
3Fuzhou Research Academy of Environmental Sciences, 32 Jinjishan Road, Fuzhou 350013, China
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Yishu Wang;
Yishu Wang
4South China Institute of Environmental Sciences, MEP, 7 Yuancun Street, Guangzhou 510655, China
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Lei Xu;
Lei Xu
1College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
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Hongche Pan;
Hongche Pan
1College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
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Rongrong Xie
Rongrong Xie
5College of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, China
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Water Sci Technol (2016) 73 (10): 2475–2485.
Article history
Received:
September 20 2015
Accepted:
February 11 2016
Citation
Peng Zhang, Yong Pang, Chengchun Shi, Yishu Wang, Lei Xu, Hongche Pan, Rongrong Xie; Analysis and numerical simulation of natural and human-caused low dissolved oxygen in the Minjiang River Estuary. Water Sci Technol 18 May 2016; 73 (10): 2475–2485. doi: https://doi.org/10.2166/wst.2016.105
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