Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Assessment of EFDC Model for Water Quality Analysis in Nakdong River

EFDC 모형의 낙동강 수질해석 적용성 평가

  • Choi, Hyun-Gu (School of Archi. & Civil Engineering, Kyungpook National Univ.) ;
  • Kim, Dong-Il (School of Archi. & Civil Engineering, Kyungpook National Univ.) ;
  • Na, Chang-Hwan (Engineering IT Department, KEPCO Engineering & Construction Company, Inc.) ;
  • Han, Kun-Yeun (School of Archi. & Civil Engineering, Kyungpook National Univ.)
  • 최현구 (경북대학교 공과대학 건축.토목공학부) ;
  • 김동일 (경북대학교 공과대학 건축.토목공학부) ;
  • 나창환 (한국전력기술 설계정보기술그룹) ;
  • 한건연 (경북대학교 공과대학 건축.토목공학부)
  • Received : 2012.01.20
  • Accepted : 2012.05.01
  • Published : 2012.07.31
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Abstract

EFDC model, which is capable of handling both hydrodynamic and water quality analysis has come to use for many recent studies. In order to assess the applicability of the EFDC model, it was applied to Nakdong river. Hydrodynamic and water quality analysis were carried out for Nakbon GH and HI sections chosen as the area of study with gaged data from 2008 to 2009. The comparison was made between water quality simulation results and observed data over water temperature, COD, TOC, DO, TN and TP. On the contrary, a conversion formula was derived to calculate BOD which the EFDC model cannot directly calculates and it was compared to measured data. In this study, it was determined that the EFDC model well represents the behavior of both hydrodynamics and water quality. However, further research on COD, TOC and accurate conversion of BOD needs to be conducted for efficient application to domestic water quality analysis.

최근 많은 연구에서 수리해석과 수질해석을 다루고 있는 EFDC 모형을 낙동강에 적용하여 수질해석의 적용성을 평가하고자 하였다. 낙동강 중하류에 해당하는 낙본 GH 구간과 HI 구간을 대상으로 2008년과 2009년의 수리해석과 수질해석을 수행하였다. 수질해석의 결과는 수온, COD, TOC, DO, TN, TP에 대해 실측자료와 비교하였으며, BOD의 경우 EFDC 모형에서 직접적으로 계산되지 않아 COD와 BOD의 환산식을 유도하여 환산된 BOD를 실측자료와 비교하였다. 금번 연구결과를 실측자료와 비교하였을 때 EFDC 모형이 하천수리해석 뿐만 아니라 수질해석에서도 높은 재현성을 가지고 있는 것으로 판단되나 향후 국내 수질해석에 활용성을 높이기 위해서는 COD나 TOC와 관련된 BOD의 정확한 환산에 관한연구가 수행되어야 할 것으로 사료된다.

Keywords

References

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