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

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• 作者：Shao-yong Lu ; Wen-tao Zhang ; Yi Xing ; Jie-ting Qu ; Ke Li…
• 关键词：Erhai Lake ; Rivers ; Nitrogen ; Phosphorus ; Permanganate index ; Distribution
• 刊名：Environmental Earth Sciences
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：74
• 期：11
• 页码：7423-7430
• 全文大小：972 KB
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• 作者单位：Shao-yong Lu (1)
  Wen-tao Zhang (1) (2)
  Yi Xing (2)
  Jie-ting Qu (1)
  Ke Li (1)
  Qiang Zhang (1)
  Wei Xue (1)
  
  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
  2. Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing, 100083, China
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：None Assigned
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-6299

文摘

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(COD_Mn), 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(COD_Mn) 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(COD_Mn) was within the Class I of “Surface Water Environmental Quality Standards of China”.