Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Assessment of merging weather radar precipitation data and ground precipitation data according to various interpolation method

보간법에 따른 기상레이더 강수자료와 지상 강수자료의 합성기법 평가

  • Kim, Tae-Jeong (Department of Civil Engineering, Chonbuk National University) ;
  • Lee, Dong-Ryul (Water Resources Research Division, Korea Institute of Civil Engineering and Building Technology) ;
  • Kwon, Hyun-Han (Department of Civil Engineering, Chonbuk National University)
  • 김태정 (전북대학교 토목공학과) ;
  • 이동률 (한국건설기술연구원 수자원.하천연구소) ;
  • 권현한 (전북대학교 토목공학과)
  • Received : 2017.09.21
  • Accepted : 2017.10.27
  • Published : 2017.12.31
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Abstract

The increased frequency of meteorological disasters has been observed due to increased extreme events such as heavy rainfalls and flash floods. Numerous studies using high-resolution weather radar rainfall data have been carried out on the hydrological effects. In this study, a conditional merging technique is employed, which makes use of geostatistical methods to extract the optimal information from the observed data. In this context, three different techniques such as kriging, inverse distance weighting and spline interpolation methods are applied to conditionally merge radar and ground rainfall data. The results show that the estimated rainfall not only reproduce the spatial pattern of sub-hourly rainfall with a relatively small error, but also provide reliable temporal estimates of radar rainfall. The proposed modeling framework provides feasibility of using conditionally merged rainfall estimation at high spatio-temporal resolution in ungauged areas.

최근 국지성 집중호우 및 급격한 기상변화로 인해 돌발홍수와 같은 기상재해의 발생빈도가 증가함에 따라 고해상도의 기상레이더 강수자료를 사용한 수공학 분야의 연구가 활발하게 진행되고 있다. 기상레이더 강수자료를 활용하는 목적은 기상레이더 강수자료가 제공하는 공간분포를 최대한 활용하는데 있다. 본 연구에서는 고해상도 기상레이더 강수자료의 공간적 특성을 유지하면서 지상 강수자료의 양적특성을 극대화할 수 있는 조건부 합성기법을 보간법에 따라 분석 하였다. 기상레이더 강수자료와 지상 강수자료를 조건부 합성하기 위하여 Kriging, 역거리 가중법 및 Spline 보간법을 적용하였다. 조건부 합성결과는 지상 강수패턴을 현실성 있게 재현하였으며 추가적으로 보간법에 적용되지 않은 강수자료와 모형검증을 수행한 결과 조건부 합성을 통하여 생산된 공간적 강수정보의 수문학적 활용이 가능할 것으로 판단된다.

Keywords

References

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