Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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A Study of Spatial Interpolation Impact on Large Watershed Rainfall Considering Elevation

고도를 고려한 공간보간기법이 대유역 강우량 산정시 미치는 영향 연구

  • 정혁 (건국대학교 대학원 사회환경시스템공학과) ;
  • 신형진 (건국대학교 대학원 사회환경시스템공학과) ;
  • 박종윤 (건국대학교 대학원 사회환경시스템공학과) ;
  • 정인균 (건국대학교 대학원 사회환경시스템공학과) ;
  • 김성준 (건국대학교 대학원 사회환경시스템공학과)
  • Received : 2011.07.25
  • Accepted : 2011.10.17
  • Published : 2011.11.30
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Abstract

This study was conducted to identify the effect of lapse rate application according to elevation on the estimation of large scale watershed rainfall. For the Han river basin (26,018 $km^2$), the 11 years (2000-2010) daily rainfall data from 108 AWS (Automatic Weather Station) were collected. Especially, the 11 heavy rain and typhoon events from 2004 to 2009 were selected for trend analysis. The elevation effect by IDW (Inverse Distance Weights) interpolation showed the change up to +62.7 % for 1,200~1,600m elevation band. The effect based on 19 subbasins of WAMIS (Water Resources Management Information System) water resources unit map, the changes of IDW and Thiessen were -8.0 % (Downstream of Han river)~ +19.7 % (Upstream of Namhan river) and -5.7 %~+15.9 % respectively. It showed the increase trend as the elevation increases. For the 11 years rainfall data analysis, the lapse rate effect of IDW and Thiessen showed increase of 9.7 %~15.5 % and 6.6 %~9.6 % respectively.

Keywords

References

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