Meteorology and Atmospheric Physics

, Volume 127, Issue 3, pp 289–303 | Cite as

Evaluation of radiation methods to study potential evapotranspiration of 31 provinces

Original Paper

Abstract

The present study aims to calibrate radiation-based methods to determine the best method under different weather conditions. For this purpose, weather data was collected from different synoptic stations in all of provinces of Iran. The potential evapotranspiration was estimated using common radiation-based methods and a sensitive analysis was done for investigating variations of the methods. The results show that the Stephens method estimates the potential evapotranspiration better than other methods in the most provinces of Iran (10 provinces). However, the values of R2 were less than 0.98 for 15 provinces of Iran. The calibrated methods estimated the potential evapotranspiration in the south east of Iran better than other provinces. Precision of the methods calibrated has been increased in all provinces. The R2 values are less than 0.98 for only six provinces (WA, EA, GO, NK, AL, and QO). In the methods calibrated, the Abtew (for YA) estimated the potential evapotranspiration better than the other methods.

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Copyright information

© Springer-Verlag Wien 2014

Authors and Affiliations

  1. 1.Young Researchers and Elite Club, Kermanshah BranchIslamic Azad UniversityKermanshahIran

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