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KMID : 1024520190280121071
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Journal of the Environmental Sciences
2019 Volume.28 No. 12 p.1071 ~ p.1083
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Temporal-Spatial Variations of Water Quality Level and Water Quality Index on the Living Environmental Standards in the West Nakdong River
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Park Kyeong-Deok
Kang Dong-Hwan
So Yoon-Hwan
Kim Il-Kyu
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Abstract
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In this study, water quality levels were classified and water quality indices were calculated and analysed by using the water quality components of living environmental standards monitored 10 years (2008 ~ 2017) at four stations in the West Nakdong River. As a result of analyzing the monthly variation of the water quality components of the living environmental standards, the water quality in the West Nakdong River was worse downstream than upstream, and pollution at the WNR3 located in the downstream of the Jomangang was the most serious. As a result of classification of water quality levels, BOD and COD levels were the lowest, so water quality pollution in the West Nakdong River was found to be highly influenced by organic matters. The water quality index was the lowest in July and August at four stations, so water quality is showing the worst in summer. As a result of analyzing the correlation between the water quality components and the water quality index, the correlation between the TOC and the water quality index was high in the four stations, and the water quality index in the West Nakdong River was dominated by organic matters and nutrients.
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KEYWORD
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West Nakdong River, Living environmental standards, Water quality level, Water quality index
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