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Spatial distribution of water quality parameters of rivers around Erhai Lake during the dry and rainy seasons

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Abstract

Surface water from 18 rivers (including the buffer zone and lakeside area) around Erhai Lake was sampled in the dry and rainy seasons of 2013. The water quality was measured and the spatial variations of selected water quality parameters were determined. The results indicated that the following five parameters, ρ(TN), ρ(NO3 −-N), ρ(NH3-N), ρ(TP), and ρ(CODMn), in the surface water of the 18 rivers changed seasonally. The average value of ρ(TN), ρ(NO3 −-N), ρ(NH3-N), ρ(TP), and ρ(CODMn) in the rainy reason was higher than that in the dry season, respectively. The average value of ρ(TN) in three rivers (Mijuhe, Yonganjiang, and Luoshijiang rivers) flowing into the lake from the north was clearly higher than that in rivers flowing into the lake from the west. In contrast, the average value of ρ(TP) in the three northern rivers was lower than that in the western rivers. In the dry season, the distribution of ρ(TP) had a significant positive correlation with the distribution of ρ(TN), but this was not significant in the rainy season. The average value of ρ(CODMn) was within the Class I of “Surface Water Environmental Quality Standards of China”.

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Acknowledgments

The authors are grateful to acknowledge the financial support of the National Major Science and Technology Project for Water Pollution Control and Management (No. 2012ZX07105-002, 2013ZX07101-014, 2009ZX07106-005), and NSF of China (41373027), (2012-YSKY-14). We also thank the assistance of colleagues at the Research Center of Lake Environment of Chinese Research Academy of Environmental Sciences.

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Authors and Affiliations

  1. Engineering and Technology Centre of Lake, State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu (SEPSORSLD), Research Centre of Lake Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China

    Shao-yong Lu, Wen-tao Zhang, Jie-ting Qu, Ke Li, Qiang Zhang & Wei Xue

  2. Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing, 100083, China

    Wen-tao Zhang & Yi Xing

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  1. Shao-yong Lu
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  2. Wen-tao Zhang
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  3. Yi Xing
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  4. Jie-ting Qu
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  5. Ke Li
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  6. Qiang Zhang
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  7. Wei Xue
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Correspondence to Shao-yong Lu.

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Lu, Sy., Zhang, Wt., Xing, Y. et al. Spatial distribution of water quality parameters of rivers around Erhai Lake during the dry and rainy seasons. Environ Earth Sci 74, 7423–7430 (2015). https://doi.org/10.1007/s12665-015-4725-8

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  • DOI: https://doi.org/10.1007/s12665-015-4725-8

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