Estimating Reference Evapotranspiration Values According to Penn Man – Monteith Modified(FAO n65 publication) and Comparing with some other Empirical Equation

Ammar Abbas(1), Ghonwa Khaddour(1), Ammar Askariam(1) and Nisrin deeb.(1)

(1) .GCSAR. Center of Latakia, Stria.

(*Corresponding author: Dr. Ammar Abbas, Email: ammarabbas1984@hotmail.com ).

Received:16/11/2022                    Accepted: 11/01/2023

Abstract: 

The research was conducted based on the daily climatic data for Al-Basel Airport Station in Lattakia province during the period 2000-2016.incauding (maximum and minimum temperatures, average relative humidity, wind speed, solar radiation, and evaporation values ​​from Class A pan) in order to calculate the values ​​of reference evapotranspiration ET0 using ET0 Calculator Model based on the modified Penman-Monteith equation (FAO n65) and comparison between the model values ​​and the field-based calculation methods (evaporation from Class A pan) and empirical equations (Hargreaves and Evanov equations). The results indicated the accuracy of the ET0 Calculator model, where the correlation coefficient between the model values ​​and the Pan method evaporation values ​​was (0.99), and the correlation coefficient between the model values ​​and the experimental equations values ​​was (0.6).

Key words: Evapotranspiration, Evaporation pan, Model, Correlation Coefficient ET0 Calculator

Full paper in Arabic: pdf