Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Discussion for the Effectiveness of Radar Data through Distributed Storm Runoff Modeling

분포형 홍수유출 모델링을 통한 레이더 강우자료의 효과분석

  • 안소라 (건국대학교 대학원 사회환경시스템공학과) ;
  • 장철희 (한국건설기술연구원 수자원연구실) ;
  • 김상호 (건국대학교 대학원 사회환경시스템공학과) ;
  • 한명선 (한국건설기술연구원 수자원연구실) ;
  • 김진훈 (한강홍수통제소 강우레이더 통합운영센터) ;
  • 김성준 (건국대학교 사회환경시스템공학과)
  • Received : 2013.09.12
  • Accepted : 2013.09.26
  • Published : 2013.11.30
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Abstract

This study is to evaluate the use of dual-polarization radar data for storm runoff modeling in Namgang dam (2,293 $km^2$) watershed using KIMSTORM (Grid-based KIneMatic wave STOrm Runoff Model). The Bisl dual-polarization radar data for 3 typhoons (Khanun, Bolaven, Sanba) and 1 heavy rain event in 2012 were obtained from Han River Flood Control Office. Even the radar data were overall less than the ground data in areal average, the spatio-temporal pattern between the two data was good showing the coefficient of determination ($R^2$) and bias with 0.97 and 0.84 respectively. For the case of heavy rain, the radar data caught the rain passing through the ground stations. The KIMSTORM was set to $500{\times}500$ m resolution and a total of 21,372 cells (156 rows${\times}$137 columns) for the watershed. Using 28 ground rainfall data, the model was calibrated using discharge data at 5 stations with $R^2$, Nash and Sutcliffe Model Efficiency (ME) and Volume Conservation Index (VCI) with 0.85, 0.78 and 1.09 respectively. The calibration results by radar rainfall showed $R^2$, ME and VCI were 0.85, 0.79, and 1.04 respectively. The VCI by radar data was enhanced by 5 %.

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References

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