Water management along the transboundary Santa Cruz River basin overlapping Arizona and Mexico, faces a host of physical, economic and institutional challenges. The situation is worsened by a failure of bilateral strategies to achieve an administratively feasible solution to these problems. The current study, utilizing data from the Santa Cruz Active Management Area in Arizona and from Nogales in Sonora, Mexico, builds an integrated framework of intersectoral water allocation within each region, incorporating relevant economic, physical and institutional constraints. Results from the baseline model and from three scenarios representing population growth and water scarcity, suggest higher optimal water use and net benefits in the urban residential sector for both regions. The outcomes conform to previous studies emphasizing the need for better water supply infrastructure and reuse of treated wastewater to counter demand from a growing population and climate induced water shortages in the region.

跨越亚利桑那和墨西哥的跨界圣克鲁斯河流域的水管理面临许多物理，经济和体制挑战。双边战略未能在行政上实现对这些问题的可行解决方案的失败使情况更加恶化。当前的研究利用了亚利桑那州圣克鲁斯有效管理区和墨西哥索诺拉州Nogales的数据，建立了每个区域内部门间水资源分配的综合框架，并纳入了相关的经济，物理和制度约束。基线模型和代表人口增长和缺水的三种情景的结果表明，这两个地区的城市居民部门的最优用水量和净收益都较高。