Theoretical and Applied Climatology

, Volume 128, Issue 3–4, pp 845–856 | Cite as

Calibration of Valiantzas’ reference evapotranspiration equations for the Pilbara region, Western Australia

  • Matin Ahooghalandari
  • Mehdi Khiadani
  • Mina Esmi Jahromi
Original Paper


Reference evapotranspiration (ET0) is a critical component of water resources management and planning. Different methods have been developed to estimate ET0 with various required data. In this study, Hargreaves, Turc, Oudin, Copais, Abtew methods and three forms of Valiantzas’ formulas, developed in recent years, were used to estimate ET0 for the Pilbara region of Western Australia. The estimated ET0 values from these methods were compared with those from the FAO-56 Penman-Monteith (PM) method. The results showed that the Copais methods and two of Valiantzas’ equations, in their original forms, are suitable for estimating ET0 for the study area. A modification of Honey-Bee Mating Optimization (MHBMO) algorithm was further implemented, and three Valiantzas’ equations for a region located in the southern hemisphere were calibrated.


Root Mean Square Error Drone Reference Evapotranspiration Royal Jelly Mean Bias Error 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors would like to thank the Bureau of Meteorology for providing the required data for this study.


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Copyright information

© Springer-Verlag Wien 2016

Authors and Affiliations

  • Matin Ahooghalandari
    • 1
  • Mehdi Khiadani
    • 1
  • Mina Esmi Jahromi
    • 1
  1. 1.School of EngineeringEdith Cowan UniversityJoondalupAustralia

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