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| Changes in water quality and identification of the sources of water pollution in the drainage basin of Dahuofang Reservoir |
| Received:March 02, 2020 |
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| KeyWord:eutrophication;agricultural non-point source pollution;principle component analysis;Dahuofang Reservoir |
| Author Name | Affiliation | E-mail | | HAN Shuang | Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China | | | XIA Chun-long | Fushun Hydrology Bureau of Liaoning Province, Fushun 113005, China | | | WANG Yong-dong | Fushun Hydrology Bureau of Liaoning Province, Fushun 113005, China | | | CAI Xi-yun | Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China | xiyuncai@dlut.edu.cn |
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| Abstract: |
| The aim of this study was to assess water quality and identify factors of water pollution in the basin of the Dahuofang Reservoir. We analyzed the water quality data of the basin from 2014 to 2018 using the comprehensive weighted average nutritional status index and principal component analysis methods. Results showed that the major water pollution factors in the basin were total nitrogen(TN)and fecal coliform(FC). Water in the reservoir had the middle nutrient level, limited by phosphorus, and the eutrophication index gradually decreased over years. The sources of water pollution in the basin were primarily agricultural cultivation(for TN), and rural activities and livestock breeding(for FC). The contribution of agricultural cultivation as a source initially increased and sequentially decreased over the years. The contribution of rural activities and livestock breeding remained constant over the years. Therefore, the heavy pollution of total nitrogen in the waters of the basin was attributed to both the continuous emission from agricultural activities and the poor utilization of total nitrogen in waters with a lack of phosphorous. |
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