"This report--requested by the Department of State--is designed to answer the question: How will water problems (shortages, poor water quality, or floods) impact US national security interests over the next 30 years? We selected 2040 as the endpoint of our research to consider longer-term impacts from growing populations, climate change, and continued economic development. However, we sometimes cite specific time frames (e.g., 2030, 2025) when reporting is based on these dates. For the Key Judgments, we emphasize impacts that will occur within the next 10 years. We provide an introductory discussion of the global water picture, but we do not do a comprehensive analysis of the entire global water landscape. For the core classified analysis--a National Intelligence Estimate--we focused on a finite number of states that are strategically important to the United States and transboundary issues from a selected set of water basins (Nile, Tigris-Euphrates, Mekong, Jordan, Indus, Brahmaputra, and Amu Darya). We judge that these examples are sufficient to illustrate the intersections between water challenges and US national security."
Intelligence Community Assessment, ICA 2012-08
United States. Office of the Director of National Intelligence: http://www.dni.gov/