Water use and crop coefficient determination for irrigated winter wheat in Arizona
AuthorGold, H. David
Renewable natural resources
Committee ChairGay, Lloyd W.
MetadataShow full item record
PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractEstimates of evapotranspiration (ET) were irrigated winter wheat in the spring of 1988 9 made for based on measurements of latent heat flux using Bowen ratio systems at the University of Arizona's Maricopa Agricultural Center (MAC). Data were examined over a 132 day period. For the same time period, reference ET estimates were made in the same region using a modified Penman equation based on data from the Arizona Meteorological Network (AZMET). A comparison of ET estimates for 118 days prior to wheat senescence shows excellent agreement (r^2 = 0.94). This implies that a simple crop coefficient can be used as a basis for irrigation scheduling for winter wheat grown under climatic conditions similar to those at MAC in 1988. In addition, the ET estimates were used to test the validity of a previously determined crop coefficient for winter wheat based on heat units and to assess current groundwater allocations in Arizona.
Degree ProgramWatershed Management