Runoff Simulation Model for Small Watersheds

ABSTRACT Adynamic hydrologic model, which simulates space and time distributed rainfall excess and runoff in a small watershed resulting from a single rainfall event, is presented. The model uses efficient algorithms and requires information on watershed topography, soil and land use characteristics and time varying rainfall records. Since the only model parameters are the SCS runoff curve number and the Manning's roughness coefficient, the model is simpler and easier to apply to watersheds where sufficient data are not available. Model validation is demonstrated on the USD A experimental watershed W-5, Mississippi and sensitivites of the model parameters are analyzed.