Este trabajo hace un análisis del impacto que tendrá en la agricultura un precio creciente del agua en dos zonas regables. Para ello emplea un modelo de programación clásico y otro en el que se efectúa una simulación de función de utilidad deducido a partir de metodología multicriterio.......Weighted goal programming is applied to two irrigation units in Spain in order to obtain a surrogated utility function. The MAUF obtained is used to simulate behaviour under increasing price of water. Conclusions show that behaviour differs as a function of farm size and socioeconomic characteristics of farmers. Also MAUF models outperform to classical LP models by a closer prediction of observed decisions.