Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
권호 표지

Characteristics of Non-point Pollution Discharge on Stormwater Runoff from Lake Doam Watershed

도암호 유역의 강우시 비점오염물질 유출 특성

  • Kwak, Sung-Jin (Department of Environmental Engineering, Kangwon National University) ;
  • Bhattrai, Bal Dev (Department of Environmental Engineering, Kangwon National University) ;
  • Kim, Eun-Jung (Department of Environmental Engineering, Kangwon National University) ;
  • Lee, Chang-Keun (Department of Environmental Engineering, Kangwon National University) ;
  • Lee, Hyeong-Jin (NIER) ;
  • Heo, Woo-Myung (Department of Environmental Engineering, Kangwon National University)
  • 곽성진 (강원대학교 환경공학과) ;
  • 발데브 (강원대학교 환경공학과) ;
  • 김은정 (강원대학교 환경공학과) ;
  • 이창근 (강원대학교 환경공학과) ;
  • 이형진 (국립환경과학원 한강물환경연구소) ;
  • 허우명 (강원대학교 환경공학과)
  • Received : 2012.01.18
  • Accepted : 2012.02.28
  • Published : 2012.03.31
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Abstract

Lake Doam watershed was surveyed to evaluate non-point source discharge characteristics and discharge load including several water quality parameters in Song Stream from July 2009 to July 2011. Concentrations of water pollutants were high during the rainfall period, especially, SS, TP and COD showed increasing tendencies toward cumulative water discharge but TN did not show much difference. SS, TP and COD had an initial flush effect of over 50 mm rainfall event but there was no clear tendency for rainfalls below that level. Event mean concentration (EMC) regarding the rainy and dry period showed large differences. Especially rainy season EMC (SS, TP, COD) demonstrated an increasingly high tendency. EMCs of COD, SS, TN and TP measured for twelve rain events were as high as 26.1, 866.0, 4.68 and 0.605 mg $L^{-1}$, respectively. COD, SS, TN and TP loadings from the highland agricultural region of the Song Stream watershed were 34,263, 1,250,254, 2,673 and 933 kg $yr^{-1}\;km^{-2}$, respectively, which were relatively higher than the results of other stream systems. Therefore, it is strongly recommended that long-term monitoring and non-point pollution reduction programs for the highland agricultural area to continue. Furthermore, this non-point source pollution loading research acquired from the highland agricultural area could be the base for reassessment.

Keywords

References

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