An interdisciplinary approach to the solution of the water resource problems of the Lower Rio Grande Region in New Mexico was centered around a socio-economic model, developed to represent the New Mexico economy, with special emphasis placed upon the Rio Grande region. Inputs into the socio-economic model were obtained from separate studies covering the hydrological, agricultural, municipal, and industrial areas. Three sets of alternatives were considered: Growth without a water constraint; growth, with a surface-water constraint; growth, with both surface- and ground-water constraints. (Modified author abstract)