Two-Dimensional Numerical Model of Basin Irrigation Based on a Hybrid Numerical Method
Publication: Journal of Irrigation and Drainage Engineering
Volume 138, Issue 9
Abstract
A numerical model of basin irrigation flow is a useful tool in the design and evaluation of surface irrigation systems. A two-dimensional (2D) complete hydrodynamic numerical model of basin irrigation was established by using the time–space hybrid numerical method. Differences in stability, convergence, precision, and efficiency of the 2D model were analyzed and compared between the hybrid numerical method proposed in this paper and the Roe finite-volume method. At the same time, the computational performance and simulation effects were validated on the basis of the results of typical basin irrigation tests. The results show that the hybrid numerical method provides better numerical stability and convergence with lower water quantity balance and average relative errors than does the Roe finite-volume method. The computational efficiency is about three times higher under the same measurement circumstances. The proposed model of basin irrigation can increase computational stability and convergence, improve computational precision and efficiency, and provide a good numerical simulation tool for the design and evaluation of basin irrigation systems.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 138 • Issue 9 • September 2012
Pages: 799 - 808
Copyright
© 2010 American Society of Civil Engineers.
History
Received: Nov 17, 2009
Accepted: Oct 13, 2010
Published online: Oct 19, 2010
Discussion open until: Mar 19, 2011
Published in print: Sep 1, 2012
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