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KMID : 1024520130220050533
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Journal of the Environmental Sciences
2013 Volume.22 No. 5 p.533 ~ p.542
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Assessment of Actual Evapotranspiration in the Hancheon Watershed, Jeju Island
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Kim Nam-Won
Lee Jeong-Eun
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Abstract
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In this study, estimation methods for actual evapotranspiration have been studied using the concept of potential and actual
evapotranspiration. Among the diverse estimation methods, SWAT-K application is chosen for hydrological modeling. For
Jeju island we have characterized annual and monthly evapotranspiration using SWAT-K. In the results, simulated potential evapotranspiration reached to the 91% of small pan evaporation. With respect to the temperature lapse rate(-6 ℃/km)depending on the altitude of Halla mountain, evapotranspiration rate decreased by 7.5% compared to the status when the temperature data from the Jeju weather station were applied to the watershed. As the average of annual rainfall increased,potential evapotranspiration was increased, actual evapotranspiration was, however, decreased.
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KEYWORD
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Actual and potential evapotranspiration, SWAT-K, Jeju island
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