Simulation of Unsteady Flow and Soil Erosion in Irrigation Furrows
Publication: Journal of Irrigation and Drainage Engineering
Volume 138, Issue 4
Abstract
This study developed a one-dimensional numerical model for the simulation of unsteady flow and the resultant soil erosion in irrigation furrows. The model solves a modified version of the Saint-Venant equations that consider the loss of mass and momentum attributable to infiltration and sediment transport. The transport rate of fine sediment was predicted with a modified Laursen formula that treats the tractive shear stress as a function of both Reynolds number and the particle size. The modified Laursen formula was verified by using the erosion data measured in the field and in a laboratory flume. The model accurately predicted flow advance times and outflow hydrographs in comparison with data measured in irrigation furrows at Kimberly, Idaho. Sediment discharge predictions were less accurate.
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Acknowledgments
This work is a result of collaborative research sponsored by the U.S. Department of Agriculture, Agricultural Research Service, Arid Land Agricultural Research Center, under Specific Agreement Number 58-5347-8-413. Thanks to Ms. Bai Yang and Ms. Anu Acharya who assisted with the experiments.
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Information & Authors
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Published In
Journal of Irrigation and Drainage Engineering
Volume 138 • Issue 4 • April 2012
Pages: 294 - 303
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Sep 29, 2010
Accepted: Jul 8, 2011
Published online: Jul 11, 2011
Published in print: Apr 1, 2012
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