Volume 8 Issue 2
Apr.  2015
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Xiao-qing Wang, Zhao-cun Liu, Ji-lun Miao, Ning Zuo. 2015: Relationship between nutrient pollutants and suspended sediment in upper reaches of Yangtze River. Water Science and Engineering, 8(2): 121-126. doi: 10.1016/j.wse.2015.04.003
Citation: Xiao-qing Wang, Zhao-cun Liu, Ji-lun Miao, Ning Zuo. 2015: Relationship between nutrient pollutants and suspended sediment in upper reaches of Yangtze River. Water Science and Engineering, 8(2): 121-126. doi: 10.1016/j.wse.2015.04.003
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Relationship between nutrient pollutants and suspended sediment in upper reaches of Yangtze River

doi: 10.1016/j.wse.2015.04.003

  • Southwest Research Institute of Water Transport Engineering, Chongqing Jiaotong University, Chongqing 400016, P R China

Funds:  This work was supported by the Chongqing Education Foundation (Grant No. KJ1400324) and the Advanced Research Project of Chongqing Science and Technology Commission (Grant No. cstc2013jcyjA20013)
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  • Corresponding author: Xiao-qing Wang
  • Received Date: 2013-12-24
  • Rev Recd Date: 2015-01-05
    Abstract
  • In order to study the relationship between nutrient pollutants and suspended sediment (SS) in the upper reaches of the Yangtze River and two tributaries, water samples were collected from September 1, 2010 to September 30, 2011 at the Zhutuo, Cuntang, Beibei, Wulong, Qingxichang, Wanxian, and Fengjie cross-sections. In the laboratory, the SS concentration and the concentration of SS whose particle size was smaller than 0.02 mm were measured. Phosphorus (P), nitrogen (N), and permanganate index (CODMn) concentrations in the natural water sample, the settled water sample, and two types of filtered water samples obtained through filter membranes with pore sizes of 0.02 mm and 0.45 µm were monitored synchronously. The results show that there are strong relationships between the P and CODMn concentrations and the SS concentration. P mainly exists in particulate form, while N mainly exists in dissolved form. SS whose particle size is smaller than 0.02 mm accounts for a high proportion of sediment in the Yangtze River and has a strong effect on water quality. At the seven cross-sections, the amounts of P, N, and CODMn in particulate form in the wet season are higher than in the dry season and the adsorption amounts of P, N, and CODMn per unit mass of sediment are higher in the dry season than in the wet season.

     

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