Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Estimation of CBOD Decay Rate for the Execution of Water Quality Model in the Nakdong-River Basin

낙동강에서 수질모델 실행을 위한 탈산소계수의 평가

  • Yu, Jae-Jeong (Nakdong River Water Environment Research Laboratory, National Institute of Environmental Research) ;
  • Yoon, Young-Sam (Nakdong River Water Environment Research Laboratory, National Institute of Environmental Research) ;
  • Lee, Hae-Jin (Nakdong River Water Environment Research Laboratory, National Institute of Environmental Research) ;
  • Kim, Moon-Soo (Nakdong River Water Environment Research Laboratory, National Institute of Environmental Research) ;
  • Yang, Sang-yong (Nakdong River Water Environment Research Laboratory, National Institute of Environmental Research) ;
  • Lee, Young Joon (Yeongsan River Water Environment Research Laboratory, National Institute of Environmental Research)
  • 유재정 (국립환경연구원 낙동강물환경연구소) ;
  • 윤영삼 (국립환경연구원 낙동강물환경연구소) ;
  • 이혜진 (국립환경연구원 낙동강물환경연구소) ;
  • 김문수 (국립환경연구원 낙동강물환경연구소) ;
  • 양상용 (국립환경연구원 낙동강물환경연구소) ;
  • 이영준 (국립환경연구원 영산강물환경연구소)
  • Received : 2005.05.03
  • Accepted : 2005.07.14
  • Published : 2005.09.30
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Abstract

CBOD(carbonaceous BOD) decay rate was investigated for the execution of water quality model in Nakdong-Rive basin. Estimation of laboratory-derived CBOD decay rate, $k_l$ and CBOD decay rate in natural waters, $k_d$ were carried out. Hydraulic factors were applied for the calculation of $k_d$. Values of biochemical oxygen demand were investigated in Weagwan, Koreong, Jeokpo, Namgi and Mulgeom sites for the four times. The ranges of $k_l$ value were $0.04{\pm}0.01{\sim}0.14{\pm}0.03$. The values of $k_l$ in upstream sites were much larger than those in the downstream sites. The values of $k_d$ were 0.025, 0.036, 0.005 and 0.001 at Weagwan, Jeokpo, Namgi and Mulgeom, respectively, indicating that values of $k_d$ were generally larger than those of $k_l$.

Keywords

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