Potential Evapotranspiration in Arid Regions
Open Access
- 1 February 1964
- journal article
- Published by American Meteorological Society in Journal of Applied Meteorology
- Vol. 3 (1) , 98-104
- https://doi.org/10.1175/1520-0450(1964)003<0098:peiar>2.0.co;2
Abstract
The concept of potential evapotranspiration, as applied to arid regions, is examined using an energy balance approach suggested by Budyko. Using data for Yuma, Ariz., it is shown that a 50 per cent increase in the relative humidity of the air above an irrigated field is accompanied by a 10 to 15 per cent decrease in potential evapotranspiration, a negligible decrease in the net radiation, and a temperature increase of the surface relative to the air of 2 to 3C. The estimated annual potential evapotranspiration at Yuma is about 2000 mm, which is 30 to 50 per cent higher than estimates based on Thornthwaite's method.Keywords
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