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.

Abstract
1. 서 론
2. 연구 방법
3. 결과 및 고찰
    3.1. 서낙동강에서 생활환경기준 수질성분의 월 변동분석
    3.2. 수질등급과 수질지수 변동 분석
4. 결 론
REFERENCE

• 박경덕(부경대학교 마린융합디자인협동과정) | Kyeong-deok Park (Interdisciplinary Program of Marine Convergence Design, Pukyong National University)
• 강동환(부경대학교 환경연구소) | Dong-hwan Kang (Environmental Research Institute, Pukyong National University) Corresponding author
• 소윤환(부경대학교 환경연구소) | Yoon Hwan So (Environmental Research Institute, Pukyong National University)
• 김일규(부경대학교 환경공학과) | Il-kyu Kim (Department of Environmental Engineering, Pukyong National University)