Hydrologic Modeling of Khanpur Dam Watershed Using Snowmelt Runoff Model

Abstract

The flow contribution to Haro River is from the three main sources i.e. rainfall, snowfall and groundwater. Certain models like HBV (HydrologiskaByransVattenbalansavdelning) model, UBC (University of British Columbia) watershed model and SRM (Snowmelt Runoff Model) are available for the watershed modeling accounting the process of snowmelt. This particular studies utilizes SRM. Khanpur watershed was selected as study area and the watershed was calibrated for the hydrologic year 2005. The daily river discharge and daily precipitation data were used in calibration of the study area. The area was divided into five elevation zones. Moderate Resolution Imaging Spectroradiometer MODIS remote sensing product was used to predict snow cover area of Khanpur dam watershed. The calibration results show high efficiency value of 88% but the validation results were not very encouraging. The poor efficiency of validation results were highly believed to be as result of low snow cover in the watershed. From the results it was concluded that SRM cannot work well for low snow covered watersheds.