Surface Energy Balance-Based Model for Estimating Evapotranspiration Taking into Account Spatial Variability in Weather
Publication: Journal of Irrigation and Drainage Engineering
Volume 134, Issue 6
Abstract
Reliable estimates of evapotranspiration (ET) from vegetation are needed for many types of water-resource investigations. How well models can estimate ET from vegetation varies, depending on the capabilities of the model as well as the nature of the targeted vegetation. Model accuracy also depends heavily on the quality and quantity of the data used. Several ET models have been developed that use an energy balance approach in which the data used by the models are derived from satellite imagery. This research introduces an enhanced surface energy balance-based model, the remote sensing of evapotranspiration or ReSET model, for estimating ET. ReSET is an ET estimation model that takes into consideration the spatial variability in weather parameters, which makes it particularly applicable for calculating regional scale ET. ReSET also has the capability of interpolating between the available weather stations in time and space. The model’s accuracy at daily and seasonal time scales is evaluated in several case studies.
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Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 134 • Issue 6 • December 2008
Pages: 681 - 689
Copyright
© 2008 ASCE.
History
Received: Jun 18, 2007
Accepted: Jul 1, 2008
Published online: Dec 1, 2008
Published in print: Dec 2008
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