Andrea K. Gerlak is an associate professor in the School of Geography and Development and an associate research professor at the Udall Center for Studies in Public Policy at the University of Arizona. Her research focuses on institutions for governing water resources.

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The year 2019 marked a significant milestone in U.S.-Mexico hydrodiplomacy: seventy-five years since the two countries adopted the Treaty of 1944, which apportioned between them the waters of the Rio Grande, Colorado River, and Tijuana River.