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Millions in Colorado basin to face water
shortage: Study
Monday December 24, 2012 07:25:11 PM,
IANS
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Washington: Warmer
weather and a growing population may in a few decades cause a
water shortage for 40 million people who depend on the Colorado
river in the US, researchers say.
Climate modellers at the Columbia university's Lamont-Doherty
Earth Observatory predict a 10 percent drop in the Colorado
river's flow over the next few decades.
The drop, they say, is enough to disrupt long time water-sharing
agreements between farms and cities in the American Southwest -
from Denver to Los Angeles to Tucson, and through California's
Imperial Valley.
"It may not sound like a phenomenally large amount except the
water and the river is already over-allocated," said Richard
Seager, climate scientist at the Columbia Earth Observatory, who
led the study, the journal Nature Climate Change reports.
The study expands on findings published in 2007 in the journal
Science that the American Southwest is becoming more arid as
temperatures rise and rainfall patterns shift from human-caused
climate change, according to a Columbia statement.
It also comes on the heels of a major study of the Colorado river
basin by the US department of interior that projected longer and
more severe droughts by 2060, and a nine percent decline in the
Colorado's flows.
"The projections are spot on," said Bradley Udall, expert on
hydrology and policy of the American West, at the University of
Colorado, Boulder.
"Everyone wondered what the next generation of models would say.
Now we have a study that suggests we better take seriously the
drying projections ahead."
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