The performance was measured based on the hydrological credibility of the model's output during the validation and calibration phases. The obtained outputs of the developed physically based models to simulate the rainfall-runoff process in the Katar catchment are presented in Table 6.

Table 6

The results of physically based models for rainfall-runoff modeling

SWAT
HBV
HEC-HMS
Goodness of fitCalibrationValidationCalibrationValidationCalibrationValidation
NSE 0.83 0.799 0.762 0.73 0.756 0.7065 
RMSE (m3/s) 7.85 8.68 9.4 10.37 9.52 10.84 
MAE (m3/s) 5.374 5.658 6.407 7.863 6.037 7.135 
R2 0.857 0.85 0.777 0.835 0.779 0.762 
PBIAS (%) −16.1 −22.3 −19.3 −31.16 −18.4 −22.5 
RSR 0.407 0.434 0.488 0.518 0.494 0.542 
SWAT
HBV
HEC-HMS
Goodness of fitCalibrationValidationCalibrationValidationCalibrationValidation
NSE 0.83 0.799 0.762 0.73 0.756 0.7065 
RMSE (m3/s) 7.85 8.68 9.4 10.37 9.52 10.84 
MAE (m3/s) 5.374 5.658 6.407 7.863 6.037 7.135 
R2 0.857 0.85 0.777 0.835 0.779 0.762 
PBIAS (%) −16.1 −22.3 −19.3 −31.16 −18.4 −22.5 
RSR 0.407 0.434 0.488 0.518 0.494 0.542 
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