• Title/Summary/Keyword: 보엔비 방법

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Validation of Net Radiation Measured from Fluxtower Based on Eddy Covariance Method: Case Study in Seolmacheon and Cheongmicheon Watersheds (에디공분산 방법 기반의 플럭스 타워 순 복사에너지 검증: 설마천, 청미천 유역)

  • Byun, Kyuhyun;Shin, Jiyae;Lee, Yeon-Kil;Choi, Minha
    • Journal of Korea Water Resources Association
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    • v.46 no.2
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    • pp.111-122
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    • 2013
  • The necessity of clear understanding of water and energy cycles has been attracted recently due to the climate change. The micrometeorological flux tower networks play a role of cornerstone of the hydrological and ecological analyses. Although the eddy covariance techniques used for flux tower have been proven to be applicable for estimation of latent heat flux, the raw data are often underestimated and needs to be corrected. Among several methods, the Bowen ratio is recognized as the most useful method in which the net radiation and other flux data (Ground heat flux, Sensible heat flux) are used and needed to be validated. In this study, in order to validate the net radiation from flux tower in Seolmacheon and Cheongmicheon watersheds, we compare it with two version of calculated net radiation: (1) FAO 56 Daily net radiation proposed by Allen et al. (1998). (2) Instantaneous net radiation proposed by Bastiaanssen (1995). The results showed that the net radiation from the flux data had similar tendency with those calculated based on physical theory. In addition, after it was applied to Bowen ratio method, the corrected latent heat flux was considerably improved with making the energy balance much more closed.