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http://dx.doi.org/10.3741/JKWRA.2004.37.6.479

Calculation of Evapotranspiration Based on Daily Temperature  

Oh, Nam-Sun (Department of Ocean Civil Engineeing, Mokpo National Maritime University)
Lee, Khil-Ha (Environmental Research Institute, University of Connecticut)
Publication Information
Journal of Korea Water Resources Association / v.37, no.6, 2004 , pp. 479-485 More about this Journal
Abstract
This study presents the calculation of evapotranspiration using estimated daily incoming solar radiation based on maximum daily temperature and minimum daily temperature. The Thornton and Running method(1999) was used to estimate daily incoming solar radiation and then the resulting solar radiation was compared with the measurements. It showed that the estimated daily solar radiation was within reasonable accuracy. In turn, the estimated daily solar radiation was applied to calculate the daily evapotranspiration using the Priestly-Taylor equation and Penman equation and the general results were that evapotranspiration was overestimated in the Priestly-Taylor equation but that Penman was a good estimator with this approach. It is encouraging that it is possible to use this approach, because the required historical data for its estimation are not extensively available and it is not easy to access the meteorological stations in most areas. The calculated eyapotranspiration was compared with that of Hargreaves which was based on daily temperature, and gives us some intuition in terms of engineering.
Keywords
evapotranspiration; solar radiation; Penman equation; Priestly-Taylor equation; Hargreaves equation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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