Optimizing Irrigation Management for Pollution Control and Sustainable Crop Yield

by G. R. Musharrafieh,
R. C. Peralta,

Document Type: Proceeding Paper

Part of: Management of Irrigation and Drainage Systems: Integrated Perspectives


We developed a simulation-optimization model which maximizes crop yield while maintaining target salt concentration in the root zone, and/or preventing salt from leaching to the groundwater. The model performs nonlinear optimization and simulation. Implicit finite difference forms of the nonlinear, transient, unsaturated water flow equation, and the convection-diffusion equation are embedded as constraints. Other constraints include nonlinear functions describing the hydraulic properties of the medium. The objectives of the management model is to develop irrigation strategies which prevent salt leaching to the groundwater when salty irrigation water is used. Five different irrigation strategies are developed for Huntington Research Farm, Utah, and are presented in this paper.

Subject Headings: Optimization models | Irrigation | Groundwater management | Groundwater pollution | Crops | Salt water | Water pollution | Soil pollution | Utah | United States

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