Agroforestry Drainage Management Model. III: Field Salt Flow
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VIEW THE ORIGINAL ARTICLEPublication: Journal of Irrigation and Drainage Engineering
Volume 120, Issue 2
Abstract
Eucalyptus trees are being recommended as a management option for lowering the shallow ground water and reusing saline subsurface drainage water in drainage‐impacted areas of the San Joaquin Valley in California. Both field and modeling studies are being carried out. To assess the efficacy of eucalyptus trees for these purposes, a finite‐element method based on the Galerkin technique was used to solve the nonconservative transport governing equation. The nonconservative nature of salinity was addressed by the dissolution and precipitation of gypsum in the vadose zone. Water fluxes and volumetric moisture content needed to solve the solute model were obtained from outputs of the water‐flow submodel. The present paper shows the mathematical formulation of the 2D salinity submodel as well as an example of an application during the 1990 irrigation season to an agroforestry system at the Mendota site. The measured and predicted salinity distribution was found to have good linear correlation coefficients (an average of 0.856). The sensitivity analysis of different irrigation practices on salinity distribution and shallow ground water quality are also presented.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 120 • Issue 2 • March 1994
Pages: 397 - 413
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: May 24, 1993
Published online: Mar 1, 1994
Published in print: Mar 1994
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