WATER QUALITY STATUS AND POLLUTION ASSESSMENT OF LHALU WETLAND IN TIBET IN DIFFERENT PERIODS

TIAN Han-xin; WANG Jia-jun; ZHOU Lei; XU De-fu; ZHANG Jian-wei; PENGCUO Ci-ren

doi:10.13205/j.hjgc.202106030

Volume 39 Issue 6

Jan. 2022

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TIAN Han-xin, WANG Jia-jun, ZHOU Lei, XU De-fu, ZHANG Jian-wei, PENGCUO Ci-ren. WATER QUALITY STATUS AND POLLUTION ASSESSMENT OF LHALU WETLAND IN TIBET IN DIFFERENT PERIODS[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(6): 198-206. doi: 10.13205/j.hjgc.202106030

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WATER QUALITY STATUS AND POLLUTION ASSESSMENT OF LHALU WETLAND IN TIBET IN DIFFERENT PERIODS

doi: 10.13205/j.hjgc.202106030

TIAN Han-xin^1,2,3,
WANG Jia-jun^1,2,3,
ZHOU Lei^1,2,3,
XU De-fu^{1,2,3
,
,},
ZHANG Jian-wei⁴,
PENGCUO Ci-ren⁵

1. School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;
2. Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China;
3. Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing 210044, China;
4. School of Mathematics and Statistics, Nanjing University of Information Science & Technology, Nanjing 210044, China;
5. Lhalu Wetland National Nature Reserve, Lhasa 850000, China

Received Date: 2020-04-13
Available Online: 2022-01-18

Abstract

Abstract

The water quality of Lhalu wetland was analyzed in December 2018(dry season) and May 2019(wet season), based on field investigation and indoor analysis.Resultsshowed that total nitrogen, total phosphorus and ammonia nitrogen were 0.157~26.797 mg/L, 0.003~4.259 mg/L and 0.197~24.084 mg/L, and pH, conductivity and dissolved oxygen were 6.99~9.55, 72.85~583.50 μS/cm and 1.83~12.84 mg/L, respectively, during the dry season. Total nitrogen, total phosphorus, ammonia nitrogen, pH, conductivity and dissolved oxygen were 0.077~3.104 mg/L, 0.004~0.228 mg/L, 0.005~0.094 mg/L, 6.94~9.27, 129.90~512.87 μS/cm and 1.12~12.18 mg/L, respectively, in wet season. The average conductivity of the water body from Lhalu wetland was lower in dry season than in wet season. However, higher average dissolved oxygen, pH, total nitrogen, total phosphorus, ammonia nitrogen and COD concentrations were found in dry season than in wetland season. The average conductivity of the water body was significantly negatively correlated with pH(P<0.01), but it was significantly positively correlated with ammonia nitrogen and total phosphorus(P<0.01).Resultsfrom improved Nemero Pollution Index evaluation method showed that the water quality of Lhalu wetland was mostly Class V during the dry season and pollutant were mainly distributed in the northeast areas of Lhalu wetland; the water quality was mainly Class I and Ⅲ during the wet season, and pollutants were mainly distributed in the central and southern area of Lhalu wetland.
- Lhalu wetland,
- water quality,
- pollution level,
- Nemerow pollution index,
- interpolation analysis

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