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. | Modelling stream flow of Altuma catchment using SWAT
