Preprint Article Version 1 NOT YET PEER-REVIEWED

Hydrochemical Characteristics and Water Quality Assessment of Surface Water at Xiahe County in Tibetan Plateau Pastoral of China

  1. Key Laboratory for Environmental Pollution Prediction and Control, College of Earth and Environmental Sciences, Lanzhou University, Tianshui South Road 222, Lanzhou 730000, China
  2. Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
  3. Department of Chemistry and Biology, Ryerson University, Toronto, M5B 2K3, Canada
  4. College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
Version 1 : Received: 2 August 2016 / Approved: 2 August 2016 / Online: 2 August 2016 (04:20:00 CEST)

How to cite: Zhang, Q.; Wang, S.; Yousaf, M.; Nan, Z.; Wang, S.; Ma, J.; Wang, D.; Zang, F. Hydrochemical Characteristics and Water Quality Assessment of Surface Water at Xiahe County in Tibetan Plateau Pastoral of China. Preprints 2016, 2016080006 (doi: 10.20944/preprints201608.0006.v1). Zhang, Q.; Wang, S.; Yousaf, M.; Nan, Z.; Wang, S.; Ma, J.; Wang, D.; Zang, F. Hydrochemical Characteristics and Water Quality Assessment of Surface Water at Xiahe County in Tibetan Plateau Pastoral of China. Preprints 2016, 2016080006 (doi: 10.20944/preprints201608.0006.v1).

Abstract

Water quality assessment in pastoral of Tibetan Plateau, which is water sources for about 40% of world's population and the runoff-yield area of Yellow rivers, is very important. In this paper, Xiahe county which belongs to Tibetan Plateau pastoral was investigated. Six parameters(via, chloride, COD, ammonia nitrogen, nitrate, fluoride, sulfate) were selected to assess the water quality and health degree by using fuzzy comprehensive evaluation methods. The hydrochemical type in surface water was of HCO3--Mg2+-Ca2+ type. The cations and anions in surface water were mainly from weathering and dissolution of carbonate rock. Results showed that the water quality in all 69 sampling sites was all of class Ⅰ. The integrated health degree reached more than 0.85 and the health rate were 100%. Although ammonia nitrogen was regarded as the main contamination factor, but it had a little effect on the entire body of water. Overall, the surface water qualities of most samples in Xiahe County was good condition.

Subject Areas

surface water; Tibetan Plateau pastoral area; Xiahe County; hydrochemical characteristics; fuzzy comprehensive method; water quality

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