An Analytical Interdisciplinary Evaluation of the Utilization of the Water Resources of the Rio Grande in New Mexico: Middle Rio Grande Region

An interdisciplinary approach to the solution of the water resource problems of the Middle 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: 1) growth without a water constraint; 2) growth, with a surface-water constraint, 3) growth, with both surface- and ground-water constraints.

Without a water constraint, in the Rio Grande region, both production and depletions are expected to exhibit the largest increase (59.7 percent and 47.4 percent, respectively). When a surface-water constraint is imposed, the value of production is reduced by $18.1 million in 2020 and water depletions are expected to decrease about 18.1 percent by 2020. When a total water constraint is imposed, the value of production is decreased $4.1 million below that expected when using only a surface-water constraint. and water depletions are reduced about 8.4 percent.

The Middle Rio Grande Region is expected to follow the general trend of the total Rio Grande region but at a higher growth rate. The expected increase in total value of production from 1970 to 2020 is 62.0 percent, employment 62 percent, and water depletions about 61 percent.

When a surface-water constraint is imposed, production is expected to be reduced $3.2 million in 2020, employment by 154 employees, and water depletions by 51,633 acre-feet. When an additional constraint is imposed on ground water in the MRGR, production would be decreased $2.0 million in 2020, employment by an additional 99 employees, and water depletions by 38,390 acre-feet.

Project No. A-045-NMEX