This research focuses on comparing flood forecasting by a lumped model and a physically-based distributed model in southern Alberta. It also includes urbanization impacts on the hydrology, and climate change impacts on hydrology of this area. The lumped model is called Streamflow Synthesis and Reservoir Regulation (SSARR), and the distributed model is PRMS. The SSARR model was developed by USACE, and the PRMS model was developed by USGS. The Elbow River Watershed was chosen as the study area.; Five years of data were selected for calibration and verification. The simulation periods are long-term periods from April 1 to August 31 and short-term events with focus on peak flows for 5 days before and after the event. Time step is 3 hourly increments in the SSARR model, and 1 hour for PRMS.; The calibrated SSARR model was accepted by Alberta Environment, and will be operated in Elbow river basins this year. The calibrated model is suitable for the Upper basin, the Lower basin and the Whole basin, and for wet, medium and dry years.
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