Robert G. Varady is a research professor of environmental policy and immediate past director of the Udall Center for Studies in Public Policy at the University of Arizona. His research centers on transboundary water governance in different international contexts.


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.