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| Research on water quality evaluation of the Houzi River in the pyrite mining area of the Hanjiang River Basin |
| DAI Zhenwei1,2, WANG Lei1,2, HE Xiaohei3, 4, FU Yongpeng1,2, PAN Wei1,2, ZHANG Yu1,2 |
1. Wuhan Geological Survey Center, China Geological Survey, Wuhan 430205, China;
2. Central South China Innovation Center for Geosciences, Wuhan 430205, China;
3. State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China;
4. School of Water Resources & Environmental Engineering, East China University of Technology, Nanchang 330013, China |
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Abstract In order to find out the water pollution extent in different areas of Houzi River, water samples were collected from four typical river sections of the tributary, and water quality analysis was carried out. The single factor evaluation method and the comprehensive water quality index method were used for evaluation and analysis. The results show, (1) the results of water quality evaluation of Houzi River in the pyrite mine area based on the single factor evaluation method are all inferior V class water with no difference. Nevertheless, the comprehensive water quality index method is used to evaluate the water quality of Houzi River in the four sections HZ001, HZ002, HZ003 and HZ004, from near to far of the pyrite mining area, and the comprehensive water quality index is gradually decreasing. And the corresponding categories are inferior V with black odor, inferior V but without black odor, class IV, class III respectively. All these results are in line with the actual situation based on the site investigation, which can really reflect that the water quality is becoming better with the increasing distance from the source of pollution. (2) The comprehensive water quality index method can objectively reflect the comprehensive water quality category of each section in the same river, the different pollution levels in the same water quality category, and the comparison with the water environment functional area category. And this method can also achieve the fine division of the pollution degree of inferior V water quality, which is more objective, scientific and comprehensive than the single factor evaluation method. So, the comprehensive water quality index method is suitable for the study of water pollution of different river sections in heavily polluted areas such as mining areas.
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Received: 18 April 2019
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2019, Vol. 6 
