Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Evaluation of the Possibility of Daily Flow Data Generation from 8-Day Interval Measured Flow Data using SWAT-CUP

SWAT-CUP을 이용한 8일간격 유량측정자료의 일유량 확장 가능성 평가

  • Jung, Jaewoon (Yeongsan River Environment Research Laboratory, National Institute of Environmental Research) ;
  • Cho, Sohyun (Yeongsan River Environment Research Laboratory, National Institute of Environmental Research) ;
  • Lim, Byungjin (Yeongsan River Environment Research Laboratory, National Institute of Environmental Research) ;
  • Oh, Taeyoun (Yeongsan River Environment Research Laboratory, National Institute of Environmental Research) ;
  • Ham, Sangin (Yeongsan River Environment Research Laboratory, National Institute of Environmental Research) ;
  • Kim, Kapsoon (Yeongsan River Environment Research Laboratory, National Institute of Environmental Research)
  • 정재운 (국립환경과학원 영산강물환경연구소) ;
  • 조소현 (국립환경과학원 영산강물환경연구소) ;
  • 임병진 (국립환경과학원 영산강물환경연구소) ;
  • 오태윤 (국립환경과학원 영산강물환경연구소) ;
  • 함상인 (국립환경과학원 영산강물환경연구소) ;
  • 김갑순 (국립환경과학원 영산강물환경연구소)
  • Published : 2012.07.30
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Abstract

This study is to assess the application of SWAT-CUP(Soil and Water Assessment Tool-Calibration Uncertainty Programs) and to extend daily flow data from 8-day interval flow data which has been measured by Korean Ministry of Environment(MOE). Model sensitivity analysis and calibration were performed with sequential uncertainty fitting(SUIF-2), which is one of the programs interfaced with SWAT, in the package SWAT-CUP. The most sensitive parameters were SOL_K.sol, CH_N2.rte, CN2.mgt, SOL_BD.sol, ALPHA_BF.gw, ALPHA_BNK.rte, SOL_AWC.sol, CH_K2.rte, SFTMP.bsn, GW_DELAY.gw. Following the sensitivity analysis, SWAT-CUP calibration was carried out using 8-day interval flow data from January 2008 to December 2010. The results were then assessed based on the visual agreement and simulated flow plots and the performance statistics generated $R^2$ and NSE which are 0.71 and 0.61 respectively. Results of these statistics indicated that there was a good agreement between the observed and simulated flow. To extend daily flow data from 8-day interval flow data, parameters, which were estimated by SWAT-CUP, re-entered for SWAT model. As a result, the observed flow data were found to reflect the trend of simulated flow data. From these results, it is thought that this method could be used to provide daily flow data using 8-day interval flow data.

Keywords

References

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