MODELLING RAINFALL-RUNOFF PROCESS FOR SUB CATCHMENTOF NARMADA RIVER BASIN AT HOSHANGABAD USING SEMIDISTRIBUTED MODEL HBVAbhishek Vats, Derrick Mario Denis and Archana J.Abstract In this study, the light version of HydrologiskaByransVattenbalansavdelning hydrological model (HBV),has been used to synthesize river discharge and daily flow series for twelve years in the sub catchments ofthe Narmada river basin at Hoshangabad. The plain area of Narmada river basin at Hoshangabad is usedfor this study,with a drainage area of 10594 km2 and co-ordinates lies between 22°46âNand 77°43âE. Themodel was run using twelve years data. Parametrization of parameters were obtained after warming,calibration and validating the results. There after the sensitivity analysis was done and acceptable rangefor each parameter was obtained. The Coefficient of Determination of observed and simulated discharge atthe Hoshangabad was found to be 0.84. In Narmada River Basin at Hoshangabad hydrological modelingusing the HBV model, MAXBAS is the most sensitive parameter. The sensitive parameters from high to lowalong with their slopes values are Maxbas: 0.23, Alpha: 0.018, Fc: 0.012, K1:0.010, Beta: 0.008, K2: 0.005,Perc: 0.001 and Lp 0.001. The study shows that light version of the HBV model can be used to model therunoff of the sub catchment of the Narmada river basin at Hoshangabad. |