Recently, the U.S. Dept of Interior Bureau of Land Reclamation released a study, titled Colorado River Basin Water Supply and Demand Study (Dec. 2012). The details of the report, available here, are discussed is the executive summary excerpted below:
Funded by the Reclamation through the Basin Study Program under the Department of the Interior’s WaterSMART (Sustain and Manage America's Resources for Tomorrow) Program and the agencies The Study Area is shown in figure 1 and is defined as the hydrologic boundaries of the Basin within the United States, plus the adjacent areas of the Basin States that receive Colorado River water. In many adjacent areas, the Colorado River supply is in addition to other water supply sources used to meet water demands representing the Basin States, the Study was conducted by Reclamation’s Upper Colorado and Lower Colorado Regions and the representatives of the Basin States’ agencies. The purpose of the Study was to define current and future imbalances in water supply and demand in the Basin and the adjacent areas of the Basin States that receive Colorado River water over the next 50 years (through 2060), and to develop and analyze adaptation and mitigation strategies to resolve those imbalances.
The Study did not result in a decision as to how future imbalances should or will be addressed. Rather, the Study provides a common technical foundation that frames the range of potential imbalances that may be faced in the future and the range of solutions that may be considered to resolve those imbalances.