Modelling and Analysis of Hydrodynamics and Water Quality for Rivers in the Northern Cold Region of China

Gula Tang, Yunqiang Zhu, Guozheng Wu, Jing Li, Zhao-Liang Li and Jiulin Sun
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Gula Tang: State Key Laboratory of Resources and Environmental Information Systems, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Yunqiang Zhu: State Key Laboratory of Resources and Environmental Information Systems, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Guozheng Wu: Southern Trunk Channel Management Office of South-to-North Water Diversion Project, Beijing 100195, China
Jing Li: Heilongjiang Provincial Research Institute of Environmental Science, Harbin 150056, China
Zhao-Liang Li: The Engineering Science, Computer Science and Imaging Laboratory, The National Center for Scientific Research, University of Strasbourg, Illkirch 67412, France
Jiulin Sun: State Key Laboratory of Resources and Environmental Information Systems, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

IJERPH, 2016, vol. 13, issue 4, 1-15

Abstract: In this study, the Mudan River, which is the most typical river in the northern cold region of China was selected as the research object; Environmental Fluid Dynamics Code (EFDC) was adopted to construct a new two-dimensional water quality model for the urban sections of the Mudan River, and concentrations of COD Cr and NH 3 N during ice-covered and open-water periods were simulated and analyzed. Results indicated that roughness coefficient and comprehensive pollutant decay rate were significantly different in those periods. To be specific, the roughness coefficient in the ice-covered period was larger than that of the open-water period, while the decay rate within the former period was smaller than that in the latter. In addition, according to the analysis of the simulated results, the main reasons for the decay rate reduction during the ice-covered period are temperature drop, upstream inflow decrease and ice layer cover; among them, ice sheet is the major contributor of roughness increase. These aspects were discussed in more detail in this work. The model could be generalized to hydrodynamic water quality process simulation researches on rivers in other cold regions as well.

Keywords: cold region; hydrodynamic; water quality; model; numerical simulation (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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