Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Determination of Important Parameter Control Term for Paldang Lake Water Quality Management using Load Duration Curves

오염부하지속곡선을 이용한 팔당호 수질항목별 중점관리 시점 선정

  • Kim, Dong Woo (Dept. of Environmental Engineering, University of Seoul) ;
  • Jang, Mi Jeong (Gyeonggido Paldang Water Quality Improvement Headquarters) ;
  • Park, Ji Hyoung (National Institute of Environmental Research) ;
  • Han, Ihn Sup (Dept. of Environmental Engineering, University of Seoul)
  • 김동우 (서울시립대학교 환경공학부) ;
  • 장미정 (경기도 팔당수질개선본부) ;
  • 박지형 (국립환경과학원) ;
  • 한인섭 (서울시립대학교 환경공학부)
  • Received : 2013.08.22
  • Accepted : 2013.11.07
  • Published : 2013.11.30
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Abstract

Load duration curve was applied to determine important water quality parameter control term for improvement of Paldang lake water quality. Load duration curve was analyzed with long term data from 1985 to 2012 including water quality, flow rate and climate state of Paldang water environment. From the result of flow rate patterns of paldang lake, differences between high and low flow rate of each year showed tendency of increase because rainfall characteristics of paldang lake watershed were changed by climate exchange. Both of land use state of upper Paldang lake watershed and number of limit excess from load duration curve indicated that seasonal action related with land use such as agricultural fertilizer distribution in upper watershed affected Paldang lake water quality. So focused BOD (biological oxygen demand) management during spring season from march to June is required to control organic materials in Paldand lake. The main affecting factor of TOC (total organic carbon) increase in Paldang lake was initial rainfall after march. T-N (total nitrogen) kept increasing during research period, so enhancement of T-N standard is needed to T-N control. Initial rainfall and increase of temperature during spring season from March to June showed a positive correlation with TP (total phosphorus) and Chl-a, respectively.

Keywords

References

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