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DWSM – A Dynamic Watershed Simulation Model for Studying Agricultural Nonpoint Source Pollution

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  012028,  2001 ASAE Annual Meeting. (doi: 10.13031/2013.7317) @2001
Authors:   Deva K. Borah, Renjie Xia, Maitreyee Bera
Keywords:   Agriculture, hydrology, modeling, nonpoint source pollution, sediment, water quality, watershed

DWSM, a Dynamic Watershed Simulation Model has been developed to meet an emerging need of improved models for simulating surface and subsurface runoff, soil erosion, and entrainment and transport of sediment and agricultural chemicals in large agricultural watersheds during severe rainfall events. The model reasonably predicted water and sediment discharges in the 100-km 2 Big Ditch and 251-km 2 Court Creek watersheds in Illinois. Scaling effects on parameters and model results due to alternative subdivision sizes were analyzed on the Big Ditch watershed. Stream segments in the Court Creek watershed were ranked based on their peak flows and sediment yields; and the overland elements were ranked based on unit-width peak flows and unit-width sediment yields from a historical storm instead of a design storm. The rankings were found useful for prioritizing and planning restoration.

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