3. Results and discussions
3.1. Calibration
The simulated model fitted well with observed data for all intervals
of time including days, months and years (Table 2). Daily simulations
show an R2 of 0.73 with an NS value of 0.71, which
indicate a good explanatory power of the simulation model for
daily variation in flows. Monthly simulation has an R2 of 0.82
and an NS value of 0.82, indicating that the simulation model has
good explanatory power in monthly and seasonal variations in
flows. Yearly simulations have an R2 of 0.93 and an NS of 0.88, a
good fit in explaining inter-year variability in flows. Figs. 3–5 show
the scatter plot and time-series plot of calibrations for daily,
monthly, and yearly time steps. Scatter plots show a good match
of observed and simulated data. The time-series overlay between
observed and simulated show a match in scale, direction, and
variations.