Journal of the Korean earth science society (한국지구과학회지)

The Korean Earth Science Society (한국지구과학회)
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Adjustment of Radar Precipitation Estimation Based on the Local Gauge Correction Method

국지 우량계 보정 방법을 이용한 레이더 강우 조정

  • Kim, Kwang-Ho (Department of Environmental Atmospheric Sciences, Pukyong National University) ;
  • Lee, Gyuwon (Department of Astronomy and Atmospheric Sciences, Kyungpook National University) ;
  • Kang, Dong-Hwan (Geo-Sciences Institute, Pukyong National University) ;
  • Kwon, Byung-Hyuk (Department of Environmental Atmospheric Sciences, Pukyong National University) ;
  • Han, Kun-Yeun (School of Architecture and Civil Engineering, Kyungpook National University)
  • 김광호 (부경대학교 환경대기과학과) ;
  • 이규원 (경북대학교 천문대기과학과) ;
  • 강동환 (부경대학교 지구과학연구소) ;
  • 권병혁 (부경대학교 환경대기과학과) ;
  • 한건연 (경북대학교 건축토목공학부)
  • Received : 2014.02.03
  • Accepted : 2014.04.01
  • Published : 2014.04.30
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Abstract

The growing possibility of the disaster due to severe weather calls for disaster prevention and water management measures in South Korea. In order to prevent a localized heavy rain from occurring, the rainfall must be observed and predicted quantitatively. In this study, we developed an adjustment algorithm to estimate the radar precipitation applying to the local gauge correction (LGC) method which uses geostatistical effective radius of errors of the radar precipitation. The effective radius was determined from the errors of radar rainfall using geostatistical method, and we adjusted radar precipitation for four heavy rainfall events based on the LGC method. Errors were decreased by about 40% and 60% in adjusted hourly rainfall accumulation and adjusted total rainfall accumulation for four heavy rainfall events, respectively. To estimate radar precipitation for localized heavy rain events in summer, therefore, we believe that it was appropriate for this study to use an adjustment algorithm, developed herein.

우리나라에서 악기상으로 인한 재해 유발 가능성이 높아짐으로써, 방재 및 수자원 관리 대책이 필요하다. 국지성 강한 강우에 대한 방재를 위해서는 강우량을 정량적으로 관측 및 예측해야 한다. 본 연구에서는 레이더 강우추정 오차의 지구통계학적 유효반경을 LGC 방법에 적용하여 레이더 추정강우를 조정하는 기법을 개발하였다. 지구통계적 방법을 이용하여 레이더 강우의 실제오차에 대한 유효반경을 결정하였고, LGC 방법을 기반으로 여름철 집중호우 네 사례의 레이더 강우를 조정하였다. 여름철 집중호우 사례의 레이더 1시간 누적강우량과 총누적강우량의 오차는 조정 후 각각 약 40%와 60% 이상 개선효과를 보였다. 그러므로, 여름철 국지적으로 강한 강우 현상의 레이더강우를 예측하는데 있어서 본 연구에서 개발된 조정 알고리즘을 이용하는 것은 적절한 것으로 판단된다.

Keywords

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