Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Evaluation and Comparison of Four Streamflow Record Extension Techniques for Namgang Dam Basin

남강댐 유역의 네 가지 하천유량자료 확장방법 비교 및 평가

  • Kim, Gyeong-Hoon (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Jung, Kang-Young (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Yoon, Jong-Su (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Cheon, Se-Uk (Nakdong River Environment Research Center, National Institute of Environmental Research)
  • 김경훈 (국립환경과학원 낙동강물환경연구소) ;
  • 정강영 (국립환경과학원 낙동강물환경연구소) ;
  • 윤종수 (국립환경과학원 낙동강물환경연구소) ;
  • 천세억 (국립환경과학원 낙동강물환경연구소)
  • Received : 2013.11.26
  • Accepted : 2014.01.15
  • Published : 2014.01.30
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Abstract

In this study, four methods for calculation of continuous daily flow was suggested using short-term or partial recording station of streamflow including missing data. Using these methods, standard flows at the outlet of unit/small basins for the management of total maximum daily loads (TMDLs) in Namgang dam basin were estimated from full-period flow duration curve (FDC). Four methods of extension are described, and their properties are explored. The methods are regression (REG), regression plus noise (RPN), and maintenance of variance extension types 1 and 2 (MOVE.1, MOVE.2). In these methods, the continuous daily flow was calculated using extension equation based on correlation analysis, after conducting the correlation analysis between historic record of streamflow and long-term recording station (a base station). Finally the best optimal method was selected as the MOVE.2, and the standard flows in the abundant, ordinary, low and drought flow estimated from FDC was evaluated using MOVE.2 in unit/small basins.

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References

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