Journal of Environmental Impact Assessment (환경영향평가)

Korean Society of Environmental Impact Assessment (한국환경영향평가학회)
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Estimation of the Reference Evapotranspiration using Daily Sunshine Hour

일조시간을 이용한 기준 증발산량 추정

  • Lee, Khil-Ha (Civil Engineering, Daegu University) ;
  • Cho, Hongyeon (Marine Environment and Conservation Research Department, Korea Ocean R&D Institute)
  • 이길하 (대구대학교 토목공학과) ;
  • 조홍연 (한국해양연구원 해양환경보전연구부)
  • Received : 2011.02.17
  • Accepted : 2011.08.24
  • Published : 2011.10.31
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Abstract

이 논문에서는 일사량과 일조시간에 관한 통상적인 선형관계식보다 정확한 비선형 관계식에 대한 적용검토를 수행한다. 일조시간을 이용한 일사량 추정에 이어서 Penman-Monteith 방정식을 이용하여 기준 증발산량을 추정하였다. 우리나라 20개 지점의 1997년부터 2006년까지의 일사량 및 일조시간 자료를 포함한 기상자료를 이용하여 선형 그리고 수정 비선형 Angstrom 방정식을 보정하고 기준 증발산량을 추정하였다. 일조시간과 일사량 사이의 선형과 비선형 관계식을 이용한 기준 증발산량의 상대비교를 수행하였다. 선형 및 비선형 관계식을 이용한 방법 모두 RMS 오차는 5.96, NSC(Nash-Sutcliffe Coefficient)는 0.95로 추정되었고, 그 차이는 매우 미미하였다. 그러나 상대적으로 일사량이 기준 증발산량에 크게 기여하는 하계에는 그 차이가 증가하기 때문에 보다 개선된 비선형 관계식을 이용하는 방법에 대한 엄밀한 검토가 필요하다.

Keywords

References

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