The Rio Grande-Rio Bravo River is the second longest river in the US and is a critical drinking water source for more than 13 million people. It flows south from the snow-capped mountains of Colorado through the New Mexico desert, forms the border between Texas and Mexico, and empties into the Gulf of Mexico at Brownsville, Texas. The multi-national, multi-state, ecologically diverse nature of this river makes management of the resource a complex task, especially in the context of more frequent droughts, changes in land use patterns, and increasing water use needs. The purpose of this project was to review scientific monitoring and research reports and provide an overview of the state of the knowledge of the Upper...