Abstract
A geomorphoclimatic model with a physically based infiltration component is presented. Previous equations were developed to calculate peak discharge and time to peak for a certain event in a particular basin given its morphological features and storm information. These equations were incorporated into a physically based infiltration model. This model calculates a ponding time for the event and finds effective rainfall intensity and duration. The entire model was calibrated using a few events in three catchments in Saudi Arabia. The most important parameters are hydraulic conductivity and effective soil capillary drive. The model was found to predict peak discharges reasonably well, at least for events for which detailed and accurate data are available.
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