The model is calibrated by varying the Z parameter for each of the two catchments. We observed that for the Sutlej River Basin (up to Kasol gauge station) we could not calibrate the model, i.e., the simulated model output value could not be matched with the observed water yield value by varying the value of Z parameter within its range of 1–30, due to low sensitivity of Z parameter. The baseline and calibrated values of Z of each catchment are given in Table 6.

Table 6

Baseline and calibrated values of Z of each catchment

Study areaBaseline value (Z)Calibrated value (Z)Calculated water yield (m3/sec)Observed water yield (m3/sec)% Error
Sutlej River Basin (up to Kasol gauge station) 13 Failed to calibrate 378.95 355.14 6.7
Tungabhadra River Basin (up to Haralahalli gauge station) 10 157.49 219.16 −28.14
Study areaBaseline value (Z)Calibrated value (Z)Calculated water yield (m3/sec)Observed water yield (m3/sec)% Error
Sutlej River Basin (up to Kasol gauge station) 13 Failed to calibrate 378.95 355.14 6.7
Tungabhadra River Basin (up to Haralahalli gauge station) 10 157.49 219.16 −28.14

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