A space-age method of measuring water storage across the world was pioneered more than two decades ago by Jay Famiglietti, a ASU Global Futures Scientist and an affiliate faculty member in ASU’s School of Sustainability and the School of Sustainable Engineering and the Built Environment, part of the Fulton Schools. The method, which uses data from NASA satellites to measure gravity, can detect levels of surface water, groundwater and surface moisture. The method has been recently used to detect widespread water depletion in the Great Basin, which spans across much of the western U.S. Famiglietti and others say the impacts of increasing depletion could be wide-reaching and dramatic, including threatening water supplies needed to grow food.