Fully Coupled Simulation for Surface Water Flow and Solute Transport in Basin Fertigation
Publication: Journal of Irrigation and Drainage Engineering
Volume 142, Issue 12
Abstract
Full implicit solutions are constructed for all terms of the Saint–Venant equations and advection–dispersion equation. Thereafter, a global coefficient matrix for forming algebraic equations is established to realize the simultaneous solution of both surface water flow and solute transport equations and a full-coupled model between the surface water flow and solute transport is constructed for basin fertigation. This model completely eliminates splitting errors, which exist in common solutions for both of the aforementioned equations. Moreover, the proposed model can take any time steps and is no longer constrained by stability conditions, such as the CFL (Courant, Friedrichs and Lewy) number and Peclet number. These advantages of the full-coupled model obviously improve the computational efficiency and accuracy, and its applicability in practical simulations. Three basin fertigation experiments are conducted to validate the performance of the proposed full-coupled model. The results show that the developed model achieves good fit between the simulated and observed results, and presents more efficiency than the existing model.
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Acknowledgments
This research is supported by the National Natural Science Foundation of China under Grant No. 51579250.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 142 • Issue 12 • December 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: May 19, 2015
Accepted: Jun 10, 2016
Published online: Jul 20, 2016
Published in print: Dec 1, 2016
Discussion open until: Dec 20, 2016
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