Surface‐Irrigation Nonlinear Optimization Models

Abstract

Nonlinear optimization models are developed to design and manage furrow and border irrigation methods. The objective function of the basic nonlinear model is constructed on the basis of a profit relationship, while that of the expanded nonlinear model is constructed in terms of benefit and costs. The models are solved with the MINOS 5.0 package. The values of the design variables yielded by the nonlinear models are similar to those given by an existing linear optimization model. The expanded nonlinear model gives objective function (profit plus other costs) values that are greater than those of the basic nonlinear and linear models.