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Evaluation of MODIS-derived Evapotranspiration According to the Water Budget Analysis
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 Title & Authors
Evaluation of MODIS-derived Evapotranspiration According to the Water Budget Analysis
Lee, Yeongil; Lee, Junghun; Choi, Minha; Jung, Sungwon;
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 Abstract
This study estimates MODIS-derived evapotranspiration data quality by revised RS-PM algorithm in Seolmacheon test basin. We used latent flux with eddy covariance method to evaluate MODIS-derived spatial evapotranspiration and gap-filled these data by three methods (FAO-PM, MDV and Kalman Filter) and to quantify daily evapotranspiration. Gap-filled daily evapotranspiration data was used to evaluate evapotranspiration computed by revised RS-PM algorithm derived MODIS satellite images. For the water budget analysis, we used soil moisture content that is quantified to average individual soil moisture rate observed by TDR (Time Domain Reflectometry) sensor at soil depth. The soil moisture variation is calculated in consideration from initial to final soil moisture content. According to the result of this study, evapotranspiration computed by revised RS-PM algorithm is very larger than eddy covariance data gap-filled by three methods. Also, water budget characteristics is not closed. We could analysis that MODIS-derived spatial evapotranspiration does not represent actual evapotranspiration in Seolmacheon.
 Keywords
revised RS-PM;MODIS-derived;eddy covariance;water budget;
 Language
Korean
 Cited by
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