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Assessment of Pollutant Loads for Water Enhancement in the Mankyeong River

만경강 유역 오염부하량 평가

  • Lee, Kyeong-Bo (Honam Agricultural Research Institute, NICS RDA) ;
  • Kim, Jong-Cheon (Jeonbuk Institute of Health and Environmental Research) ;
  • Kim, Jong-Gu (Honam Agricultural Research Institute, NICS RDA) ;
  • Lee, Deog-Bae (National Institute of Agricultural Science Technology, RDA) ;
  • Park, Chan-Won (Honam Agricultural Research Institute, NICS RDA) ;
  • Kim, Jae-Duk (Honam Agricultural Research Institute, NICS RDA)
  • 이경보 (작물과학원 호남공업연구소) ;
  • 김종천 (전라북도 보건환경연구원) ;
  • 김종구 (작물과학원 호남공업연구소) ;
  • 이덕배 (농업과학기술원) ;
  • 박찬원 (작물과학원 호남공업연구소) ;
  • 김재덕 (작물과학원 호남공업연구소)
  • Published : 2005.06.30

Abstract

This study was conducted to evaluate the influence of pollutant loads on the water quality in the Mankyeong River from January 2002 to December 2004. The BOD level in upstream ranged from 0.58 to 1.57 mg $L^{-1}$, which would be in I grade according to water quality criteria by Ministry of Environment but BOD level in midstream and downstream was III grade. T-N contents were high in midstream and the average T-P level ranged from 0.06 to 2.70 mg $L^{-1}$. The point raw loads of BOD was high in Iksancheon, Mokcheonpo and Cheongha basin. The point raw loads of T-N and T-P were high in Iksancheon and Cheongha watershed. The non-point low loads of BOD were 3,931 kg $day^{-1}$, 2,870 kg $day^{-1}$ and 2,827 kg $day^{-1}$ in Mokcheonpo, Top and Jeonju watershed, respectively. The major source of BOD effluent load was population, that of T-N and T-P effluent loads was livestock. The delivered load of T-N were high in Jeonju, Mokcheonpo, Gosan, Iksancheon watershed in order. The delivered load of T-N was high in Jeonju watershed and that of T-P was high in Jeonju and Iksancheon watershed. The delivery ratio of BOD and T-N at dry season were below 100% except Mokcheonpo watershed. The delivery ratio of BOD and T-N at raining season were high in Gosan watershed.

Keywords

Mankyeong River;Water quality;Pollutant loads

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