National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Surface runoff estimation from a watershed is a prerequisite for surface water assessment. Hydrological models are the only tool to assess the flow from a watershed under different scenarios. The Soil and Water Assessment Tool (SWAT), a physically based hydrological model, is used modelling monthly streamflow in Altuma catchment. The model was calibrated from 1985 to 1996. Initial 3 years from 1985 to 1987 were taken as warm up periods. Then the model was validated for 7 years from 1997 to 2003. Two indices, p-factor and r-factor were considered for analyzing uncertainty of the model. The simulation results of the model showed that p-factor and r-factor were 0.80 and 0.75 respectively, during calibration and while, during validation p-factor and r-factor were 0.69 and 0.70 respectively. The performance of the model was evaluated by coefficient of determination (R2) and the Nash–Sutcliffe efficiency (NSE). The R2 and NSE were found 0.78 and 0.74 for the calibration period and 0.69 and 0.67 for the validation period. The result has shown that the model performance was satisfactory during calibration and validation. The results would be helpful for water resources planning and management in the catchment area.
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