Posted on | July 31, 2013 | 1 Comment
Lake Mead and Lake Powell, the two major storage reservoirs on the Colorado River, closed July at 47 and 46 per cent full respectively, according to a weekly update from the federal Bureau of Reclamation. That demand is outstripping supply is clear when looking at this historical chart of changing elevations of Mead, the reservoir serving southern California, Nevada, Arizona and Mexico. To study our options for dealing with impending shortages, which include clearly wild and wildly expensive ideas about towing icebergs and diverting the Mississippi River to the West, a place to start might be this technical appendix of the Colorado River Basin Supply and Demand Study. To cut to the chase, a graphic (above) taken from the report underscores what environmentalists have argued for years. The cheapest source of new water is being less wasteful with old water. Reusing grey water, local water harvesting and conservation. Click on the image to enlarge it, then, when reading the graphic, keep in mind that the most positive rating for an option is green, neutral is yellow and red is largely negative.