Standardized Reference Evapotranspiration: A New Procedure for Estimating Reference Evapotranspiration in Arizona

Abstract

This publication describes the procedure that is now recommended as a US standard for computing reference evapotranspiration. Included in the publication are: the rationale for developing the new procedure, the equations utilized in the new procedure, a discussion of how the new procedure differs from the established AZMET procedure, and tables to facilitate conversion between procedures (new and AZMET).