Sensitivity Analysis and Determination of the Optimal Level of Water Use Efficiency for Winter Wheat and Barley under Different Irrigation Scenarios Using the AquaCrop Model in Arid and Semiarid Climatic Conditions (Case Study: Dehloran Plain, Iran)

The AquaCrop model is one of the most recent models that can simulate growth rates and yields various crops based on water consumption levels. To determine optimal irrigation level, data measured in two crop years (2018–2019) different scenarios (full or 100% requirement 90, 80, 70, 60, 50% irrigation) were calibrated validated for arid semiarid climatic conditions using model. was to grain winter wheat barley R2, RMSE, d, EF, NRMSE statistical indicators. obtained values these indices were, respectively, 0.97, 3, 0.98, 0.94, 4 4, 0.92, 0.89, 7 barley. efficiency also harvest year 2019. For yield simulation, calculated indicators 0.99, 0.93, 4.4 7, 0.91, 9 field modeled samples analyzed by analysis variance (ANOVA) F-test, significant results both all applied at 95% level.