Period

Coefficient of determination (R2)

Nash-Sutcliffe efficiency (NSE)

Percent bias (PBIAS)

Calibration period (1945-1970)

0.64

0.25

6.48

Validation period (1971-1980)

0.71

0.21

−22.92

Thresholds (good)

>0.5

0.65 < NSE < 0.75

±10 < PBIAS < ±15

Thresholds (satisfactory)

0.50 < NSE < 0.65

±15 < PBIAS < ±25