Sediment yield prediction using AGNPS

J. Perrone; C. A. Madramootoo

ABSTRACT:

The AGNPS model was tested on a small Quebec watershed to evaluate the model's applicability and performance with respect to hydrologic conditions in this province. Sediment yield was simulated for 12 rainfall-runoff events. SCS curve numbers and USLE factors were adjusted to produce better simulations. The antecedent precipitation index was used as a soil moisture indicator. AGNPS storm types and channel scouring parameters were adjusted for the relatively large events. An average error of 28.2%, and a coefficient of performance of 0.01 was observed for predicted values.

Footnotes

J. Perrone and C.A. Madramootoo are with the Department of Agricultural Engineering on the Macdonald Campus of McGill University, Anne de Bellevue, Quebec, Canada. This project was supported by the Sociéty d'agriculture de Montcalm under funding from the Canada-Quebec Green Plan of Agriculture and Agri-Food Canada and the Minisière de l'agriculture, de l'alimentation et des pecheries du Québec.
Copyright 1999 by the Soil and Water Conservation Society

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