Estimating Daily Net Radiation over Vegetation Canopy through Remote Sensing and Climatic Data
Publication: Journal of Irrigation and Drainage Engineering
Volume 133, Issue 4
Abstract
Net radiation =key variable in hydrological studies. Measured net radiation data are rarely available and are often subject to error due to equipment calibration or failure. In addition, point measurements of net radiation do not represent the diversity of the regional net radiation values which are needed for large scale evapotranspiration mapping. A procedure has been developed to estimate daily net radiation using canopy temperature, albedo, short wave radiation and air temperature. This procedure makes it possible to estimate by combining information from satellite and local weather stations. Three different methodologies are presented to estimate net radiation. Comparisons between net radiation using the three methods resulted in average error ranging from 1 to 30% and standard error of estimate ranging from .
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Acknowledgments
The writers acknowledge the support provided by the New Mexico Office of the State Engineer, United States Bureau of Reclamation, United States Department of Agriculture Rio Grande Basin Initiative Project, the Elephant Butte Irrigation District and United States Fish and Wildlife Service-Bosque del Apache National Wildlife Refuge.
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Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 133 • Issue 4 • August 2007
Pages: 291 - 297
Copyright
© 2007 ASCE.
History
Received: Jan 13, 2006
Accepted: Jan 30, 2007
Published online: Aug 1, 2007
Published in print: Aug 2007
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