3.1 Model Calibration Results (1999-2000)
During the calibration period, the model simulated flows
that matched observed flows with moderate accuracy. The
simulated flows were substantially overestimated for 1999 but
quite accurately predicted for 2000. The predicted peak
discharge closely matched observed values in 2000, differing
by only 0.2% but overestimated by 84% in 1999. The
simulated monthly flows from the SWAT model reached the
high value of both R2
and the ENs -- more than 0.8 (R2
=0.805
and ENs=0.848). The scatter plot for model calibration (Fig.
3a) showed the uniform scatter of points above the 1:1 line for
low flows, while for the peak flow it plotted very close to the
1:1 line.