Behold the incredible shrinking Colorado River

[peejay 327]

Nature's realities appear to be looking rather grim at the prospects for massive suburban sprawl in the Colorado River watershed. But that never stopped developers from building now and worrying about the consequences later. There are also some cool and informative interactive presentations on the website linked below.

Behold the incredible shrinking Colorado River

Experts: Even worse water shortages possible due to warming, population

PHOENIX - The 25 million Americans who rely on the Colorado River for water should expect continued — and even worsening — drought spells and water shortages as rising temperatures and growing populations create a double whammy, experts warned in a new report.

The experts, convened by the National Research Council, based their concerns on climate models and recent studies that found a cycle of droughts in the region over time. The studies used tree-ring histories to reconstruct local climate patterns over the last 500 years.

"These reconstructions, along with temperature trends and projections for the region, suggest that future droughts will recur and that they may exceed the severity of droughts of historical experience, such as the drought of the late 1990s and early 2000s," the experts wrote in the report released Wednesday.

The report said the region should expect higher temperatures that melt snow too early and allow too much runoff to evaporate.

"Temperature records across the Colorado River basin and the western United States document a significant warming over the past century," the experts noted. "These temperature records, along with climate model projections that forecast further increases, collectively suggest that temperatures across the region will continue to rise for the foreseeable future."

More than 25 million people in seven states — Arizona, California, Colorado, New Mexico, Nevada, Utah and Wyoming — rely on the Colorado River for water and power. The river also supports a diverse riparian system that has suffered as flows dropped.

'Trade-off choices' necessary

The report said the combination of threats could overwhelm the seven river states, which have struggled to produce a short-term drought plan.

The scientists did not propose specific policy changes, but urged Western water managers to work together on new ideas and prepare to make difficult decisions about how water is used.

"The basin is going to face increasingly costly, controversial and unavoidable trade-off choices," said Ernest Smerdon, a former dean of engineering at the University of Arizona and one of the report's authors. "Our hope would be that the community and the decision-makers will have planned before crises occur."

The experts noted that population pressure has added to the problem. Arizona's population grew by 40 percent in the 1990s, they noted, while Colorado's grew by 30 percent.

Water conservation measures have helped somewhat, but consumption has boomed in certain areas. For example, Nevada's Clark County, which includes Las Vegas, saw water use double from 1985 to 2000.

"The combination of limited water supplies, rapidly increasing populations, warmer regional temperatures, and the specter of recurrent drought point to a future in which the potential for conflict among existing and prospective new water users will prove endemic," the research council said in a statement that accompanied the report.

The report was commissioned by the U.S. Bureau of Reclamation, the Southern Nevada Water Authority and two California water agencies.

No panacea

Growing cities will force states to strike more deals with farmers for water rights, but even that supply is limited, according to the scientists.

In addition, the report ruled out the idea of a solution built around conservation or water-saving technologies.

"Technological and conservation options for augmenting or extending water supplies — although useful and necessary — in the long run will not constitute a panacea for coping with the reality that water supplies in the Colorado River basin are limited, and that demand is inexorably rising," the experts wrote.

Much of the region has seen severe drought since the late 1990s, with 2002 and 2004 being among the 10 driest years on record in the upper basin states of Colorado, New Mexico, Utah, and Wyoming.

Water storage in basin reservoirs dropped sharply during that time due to very low streamflows, the experts noted. For example, 2002 water year flows into Lake Powell were roughly 25 percent of average.

http://www.msnbc.msn.com/id/17276693/

[Ban Hammer 14,290]

i guess they better quit washing it in hot water so it will stop shrinking.

[dalegg 143]

The experts noted that population pressure has added to the problem. Arizona's population grew by 40 percent in the 1990s, they noted, while Colorado's grew by 30 percent.

Isn't it amazing how all of our problems come back to population growth. It's a good thing everybody not have a good healthcare plan or we'd have an even bigger problem, eh?

[Hilarious Clinton 452]

When I lived Boulder County our neighbor was reprimanded by the town because their lawn was not green enough. IT'S PRACTICLLY A DESERT YOU CHOPF#CKS. Plus, Illinois had a better recycling program than Boulder county. Hippie town my a$$.

[Saddle Bronc 124]

I suspect about half (or even more) of that 2.5 crore popluation quoted would be from the SD and LA metros (which are unquestionably the biggest culprits at draw-off).