Measuring Water from the Sky: Satellites Track Consumption

…from the Washington Post

“Water management is serious business in the American West, where precipitation is scarce, irrigated agriculture is a major industry, new housing subdivisions spread across arid landscapes and water rights are allocated in a complicated seniority system.  “If you can’t measure it, you can’t manage it,” water officials are fond of saying.  But measurement — trying to determine how much water is diverted from rivers and how much is pumped from hundreds of thousands of wells — has been an inexact and expensive science.”