Irrigation-Drainage Design and Management Model: Development
Publication: Journal of Irrigation and Drainage Engineering
Volume 121, Issue 1
Abstract
This paper introduces a model for the design and management of conjunctive irrigation and drainage systems. The mathematical model is based on the numerical implementation of a quasi-three-dimensional finite-difference model, which solves the Richards equation and the advective-dispersive transport equation for one-dimensional vertical flow and salt transport in the variably saturated zone above the water table; and it also solves the depth-averaged Boussinesq equation and two-dimensional advective-dispersive transport equation for areal flow and salt transport in the fully saturated zone below the water table. The model is fully interactive and is provided with a graphic user interface (GUI). It can be used to estimate the growth response of a crop to its soil-water-air-solute subsurface environment as influenced by drainage design and management practices such as irrigation scheduling, leaching, and cropping patterns. An illustrative example is included to demonstrate the capabilities of the model as a design and management tool in irrigation and drainage systems.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 121 • Issue 1 • January 1995
Pages: 71 - 82
Copyright
Copyright © 1995 American Society of Civil Engineers.
History
Published online: Jan 1, 1995
Published in print: Jan 1995
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