Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Evaluation of Impaired Waterbody and Multivariate Analysis Using Time Series Load Curve -in Jiseok Stream Watershed-

시계열 부하 곡선을 이용한 수체손상 평가 및 다변량 분석 -지석천 유역을 대상으로-

  • Park, Jinhwan (Yeongsan River Environment Research Center, National Institute of Environmental Research) ;
  • Kang, Taewoo (Yeongsan River Environment Research Center, National Institute of Environmental Research) ;
  • Han, Sungwook (Yeongsan River Environment Research Center, National Institute of Environmental Research) ;
  • Baek, Seunggwon (Yeongsan River Environment Research Center, National Institute of Environmental Research) ;
  • Kang, Taegu (Yeongsan River Environment Research Center, National Institute of Environmental Research) ;
  • Yoo, Jechul (Department of Environment Engineering, Kumoh National of Technology) ;
  • Kim, Youngsuk (Yeongsan River Environment Research Center, National Institute of Environmental Research)
  • 박진환 (국립환경과학원 영산강물환경연구소) ;
  • 강태우 (국립환경과학원 영산강물환경연구소) ;
  • 한성욱 (국립환경과학원 영산강물환경연구소) ;
  • 백승권 (국립환경과학원 영산강물환경연구소) ;
  • 강태구 (국립환경과학원 영산강물환경연구소) ;
  • 유제철 (금오공과대학교 환경공학과) ;
  • 김영석 (국립환경과학원 영산강물환경연구소)
  • Received : 2017.08.10
  • Accepted : 2017.09.27
  • Published : 2017.11.30
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Abstract

In this study, pollutant emission characteristics by water damage period analyzed 11 items (water temperature, pH, DO, EC, BOD, COD, TOC, SS, T-N, T-P and flow) with load duration curve, time series load curve and factor analysis for three years (2014-2016). Load duration curve is applied to judge the level of impaired waterbody and estimate impaired level by pollutants such as BOD and T-P in this study depending on variation of stream flow. Water quality standard exceeded the flow of mid-range and low-range by flow condition evaluation using load duration curve. This watershed was influenced by point source more than non-point source. Cumulative excess rate of BOD and T-P kept water quality standard for all seasons (spring, summer, autumn and winter) except BOD 59% in spring. Water quality changes were influenced by pollutants of basic environmental treatment facilities and agricultural areas during spring and summer. Results of factor analysis were classified commonly first factor (BOD, COD, and TOC) and second factor (flow, water temperature and SS). Therefore, effects of artificial pollutants and maintenance water must be controlled seasonally and reduced relative to water damage caused by point pollution sources with effluent standard strengthened in the target watershed.

Keywords

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