Via The River Network, a report on the watergy challenge facing the energy sector:
This summer has been a call-to-action for those of us following water and energy issues. Starting in July, power plant shutdowns in Illinois and then on the Connecticut River demonstrated the vulnerability of thermoelectric power when too much waste heat looks for somewhere to go in a summer with too little water.
And then by August, what some of us thought was the “2011 Texas drought” floated north and engulfed more than half of the country. Last week I listened to Dr. Roger Pulwarty (our nation’s lead drought expert) explain the impacts of the current deep and persistent drought. According to Dr. Pulwarty, this is the largest area of the U.S. in drought since the dust bowl. Drought severity has increased over the last several cycles and has become interspersed with more intense rain events. This drought has cost over 77 billion dollars to agriculture and put all water users on alert. But freshwater ecosystems are the first to feel the heat and are a major casualty of the current conditions.
How do we adapt? Storage reservoirs have been crucial to prolonging urban water supplies while farmers and ranchers scrambled to hang on. But dams are just buckets that people build hoping to capture rain – they don’t create water that isn’t there. Hoover Dam on the Colorado has now fallen so low that the chances of it ever refilling –and Lake Powell above it– have been called “vanishing small” by researchers. Apparently there are limits to what our most magnificent engineering wonders can provide.
In a warming world, the importance of conserving both water and energy at the same time is key to sustainability. The “call to action” is reduced consumption — while the “business as usual” approach is to expect our watersheds to produce more water and water-intensive energy — for example, by burning more coal to replace lost hydropower from Hoover Dam, or more natural gas to replace coal plants closed by loss of cooling water. Unfortunately, long-term ecological changes are already reducing the possibility that the “business as usual” approach will succeed.
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