Calibration and Validation of AnnAGNPS Model in a Watershed in Southern Ontario
Abstract:For more than two decades, watershed based non-point source models have been recognized to be an effctive tool to identify the pollution sources and selection of the best management practices. The Annualized Agricultural Nonpoint Source model (AnnAGNPS) is one of those models and was calibrated and validated for Canagagigue watershed situated at the Grand River basin of Southern Ontario. The model was run from 1991–2000 to simulate the hydrology and sediment yield and the output for first five years (1991–1995) was used to calibrate and the last five years (1996–2000) was used for the validation purpose. Calibration and validation results indicate that the model is can simulate the hydrology process fairly well. The deviation between the simulated runoff was 3.5% in calibration phase and 5% in validation phase. For sediment component, a regression equation based on the historical data was used to calculate the observed amount for the calibration and validation period. The comparison between simulated and observed sediment resulted 6.5% and 28% deviation for calibration and validation phase respectively. However, as the late winter and spring months are very critical for the runoff and sediment yield in Ontario, special attention is required to improve the model performance for this period.
Document Type: Research Article
Publication date: 2005-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites