HR: 14:15h
AN: H23A-02    [Abstracts]
TI: Calibration and Validation of Storm Runoff Modelling to Predict Water Quality Impacts in the Bow River, Calgary, Alberta, Canada
AU: * Pandit, K N
EM: kpandit@golder.com
AF: Golder Associates Ltd., 1000, 940 - 6th Ave S.W., Calgary, AB T2P 3T1, Canada
AU: Biftu, G
EM: gbiftu@golder.com
AF: Golder Associates Ltd., 1000, 940 - 6th Ave S.W., Calgary, AB T2P 3T1, Canada
AU: Bechtold, J P
EM: JPBechtold@golder.com
AF: Golder Associates Ltd., 1000, 940 - 6th Ave S.W., Calgary, AB T2P 3T1, Canada
AU: Deong, Y
EM: Yin.Deong@calgary.ca
AF: The City of Calgary, P.O. Box 2100, Station M, Calgary, AB T2P 2M5, Canada
AB: As part of the Bow River Impact Study, City of Calgary (City) has been conducting hydrologic and water quality modelling projects. In order to support the modelling studies, City is monitoring rainfall since 1990 and runoff since 2001 within the city limits. The QHM model, a continuous simulation hydrologic model, designed primarily to assess the impact of urban land uses, was used in this study to simulate snowmelt runoff (winter), rainfall runoff (summer), baseflow runoff, and pond outflow. As part of the study, the QHM model was calibrated and validated using monitored runoff data for 14 urban catchments for the period 2001 to 2002. The calibrated and validated QHM model was then extended to 32 sub-watersheds representing the entire City for over a 16-year period (1990-2006). The results of the model showed that the simulated daily runoff agrees quite well with the recorded data for both the calibration and validation watersheds (7 watersheds each). As typical in any other computer simulation models, there were some discrepancies between the simulated and observed runoff, which is primarily due to recorded time steps of snowfall and rainfall, and assessment of Mean Areal Precipitation (MAP) method. Results of this study are being integrated into the Bow River Water Quality Model to predict water quality parameters downstream of the City by incorporating City's Wastewater Treatment Plant effluent data, water quality data of the tributaries to Bow River, meteorological data, and stormwater loading rates. This presentation will focus on the stormwater modelling methodology, results, and discussion related to uncertainty associated with modelling parameters and input data. Then the discussion will follow on a brief overview on how these data will be incorporated into Bow River Water Quality Model as a final product for City's decision making and future stormwater management guidance policies.
DE: 1871 Surface water quality
DE: 1879 Watershed
DE: 1880 Water management (6334)
DE: 1894 Instruments and techniques: modeling
DE: 1895 Instruments and techniques: monitoring
SC: Hydrology [H]
MN: 2007 Joint Assembly