Predicting Incoming Solar Radiation and Its Application to Radiation-Based Equation for Estimating Reference Evapotranspiration
Publication: Journal of Irrigation and Drainage Engineering
Volume 135, Issue 5
Abstract
This paper presents an inverse square weighted interpolation for predicting the incoming solar radiation from nearby weather stations. The predicted is applied to the well-known Priestley-Taylor equation for estimating reference evapotranspiration . This cross-validation estimated bias and error in the final model predictions of the and at the 21 meteorological weather stations in Korea Peninsula. The coefficient of determination and the root-mean-square error (RMSE) for monthly estimates of was in the range of 0.83–0.95 and , respectively. The RMSE for monthly estimate of values at inland and coastal areas was 11.08 and 15.01 mm respectively. The estimates of using thus predicted to provide reasonable accuracy. The study can provide further useful guidelines for crop production, water resources conservation, irrigation scheduling, and environmental assessment.
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Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 135 • Issue 5 • October 2009
Pages: 609 - 619
Copyright
© 2009 ASCE.
History
Received: May 26, 2008
Accepted: Feb 9, 2009
Published online: Feb 12, 2009
Published in print: Oct 2009
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