Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Evaluation of the Tank Model Optimized Parameter for Watershed Modeling

유역 유출량 추정을 위한 TANK 모형의 매개변수 최적화에 따른 적용성 평가

  • 김계웅 (서울대학교 농업생명과학대학 생태조경.지역시스템공학부) ;
  • 송정헌 (서울대학교 농업생명과학대학 생태조경.지역시스템공학부) ;
  • 안지현 (서울대학교 농업생명과학연구원) ;
  • 박지훈 (서울대학교 농업생명과학대학 생태조경.지역시스템공학부) ;
  • 전상민 (서울대학교 농업생명과학대학 생태조경.지역시스템공학부) ;
  • 송인홍 (서울대학교 농업생명과학연구원) ;
  • 강문성 (서울대학교 농업생명과학대학 조경.지역시스템공학부, 농업생명과 학연구원)
  • Received : 2014.04.12
  • Accepted : 2014.06.16
  • Published : 2014.07.31
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Abstract

The objective of this study was to evaluate of the Tank model in simulating runoff discharge from rural watershed in comparison to the SWAT (Soil and Water Assessment Tool) model. The model parameters of SWAT was calibrated by the shuffled complex evolution-university Arizona (SCE-UA) method while Tank model was calibrated by genetic algorithm (GA) and validated. Four dam watersheds were selected as the study areas. Hydrological data of the Water Management Information System (WAMIS) and geological data were used as an input data for the model simulation. Runoff data were used for the model calibration and validation. The determination coefficient ($R^2$), root mean square error (RMSE), Nash-Sutcliffe efficiency index (NSE) were used to evaluate the model performances. The result indicated that both SWAT model and Tank model simulated runoff reasonably during calibration and validation period. For annual runoff, the Tank model tended to overestimate, especially for small runoff (< 0.2 mm) whereas SWAT model underestimate runoff as compared to observed data. The statistics indicated that the Tank model simulated runoff more accurately than the SWAT model. Therefore the Tank model could be a good tool for runoff simulation considering its ease of use.

Keywords

References

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