Adjusting Temperature Parameters to Reflect Well-Watered Conditions
Publication: Journal of Irrigation and Drainage Engineering
Volume 125, Issue 1
Abstract
Adjustment coefficients for air temperature and dew point temperature measurements at dry weather sites are determined for predicting reference evapotranspirations (ET0) for irrigated conditions. Seasonal and regional variation in changes in temperature parameters versus the ratio of effective precipitation to ET0 are analyzed. The determined adjustment coefficients are tested for validity using weather data from reference weather stations, and paired reference and dry stations. The effects of adjusting air temperature and dew point temperature for site aridity are analyzed using the FAO Penman-Monteith and the Hargreaves equations. Maximum reductions in ET0 caused by adjustments of temperature data for aridity effects was as high as 25%.
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Information & Authors
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Published In
Journal of Irrigation and Drainage Engineering
Volume 125 • Issue 1 • January 1999
Pages: 26 - 33
History
Received: Jul 28, 1997
Published online: Jan 1, 1999
Published in print: Jan 1999
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