Comparative Analysis of Calibration of Daily Potential  Evapotranspiration using  Class “A” Pan Evaporation in Saudi Arabia

Falah, Fahda

doi:10.21608/aafu.2020.126865

Comparative Analysis of Calibration of Daily Potential Evapotranspiration using Class “A” Pan Evaporation in Saudi Arabia

Document Type : Original Article

Author

Fahda Falah

10.21608/aafu.2020.126865

Abstract

   This study evaluated the calibration of the Thornthwaite, Blaney-Criddle, Makkink, Jensen-Haise, Ivanov and Turc potential evapotranspiration models by actual evaporation of the Class “A” Pan of four climatic stations, Tabuk station in the Northwest, King Khaled airport station in Riyadh, Qaissoumah and Hail in Central, Khamis Mushayt station in the South-West , Jeddah in the Western coast and Dahran in the Eastern coast of Saudi Arabia.
   The results of this study showed some spatial variations of Class A Pan evaporation between the studied stations and in between the models estimation in the same station in different seasons. In order to distinguish between the estimations of these models, four statistical tests were applied ; the Mean Absolute Error (MAE), Root Mean Square Error (RMSE), the Percentage Error (PE) and the Reliability Coefficient (RC).
   The Blaney-Criddle model fits the climatic records of the King Khalid Airport in Riyadh and Tabuk. The Makkink model at Khamis Mushayt climatic station , the Turc model at Jeddah climatic station , the Ivanov model at Qaissoumah and Dahran and the Ivanov with Turc in Hail are the best models for estimating the monthly average of evapotranspiration.

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