Posted on August 18, 2014 by Bob Berwyn
‘In our data we find unambiguous evidence of anthropogenic contribution to glacier mass loss’
Shrinking glaciers on the Dachstein Mountains in Austria will affect water supplies far downstream in local areas and in distant rivers. bberwyn photo.
FRISCO — Some of the world’s glaciers were shrinking before the onset of unchecked heat-trapping pollution, but the human factor in the glacial equation has grown exponentially in the past few decades.
A new modeling study led by scientists at the University of Innsbruck (Austria) shows that only about 25 percent of the global glacier mass loss during the period of 1851 to 2010 is attributable to anthropogenic causes. However, between 1991 and 2010 the fraction increased to about two-thirds.
“In the 19th and first half of 20th century we observed that glacier mass loss attributable to human activity is hardly noticeable but since then has steadily increased,” said researcher Ben Marzeion, explaining that scaled-down regional models can detect an anthropogenic influence in America and the Alps, where glacier changes are particularly well documented. Continue reading
Filed under: climate and weather, Environment | Tagged: climate, Environment, glaciers, global warming, greenhouse gases, mountains, water | Leave a comment »
Posted on August 16, 2014 by Bob Berwyn
More heatwaves, wildfires and water shortages in the outlook
Colorado will warm dramatically in the next few decades.
FRISCO — By the middle of this century, Denver’s average temperature could be 6 degrees Fahrenheit warmer than today — on par with Albuquerque, according to a new climate report released by the Colorado Water Conservation Board in early August.
Even with deep cuts in greenhouse gas emissions, Colorado will continue to get warmer. An increase of at least 2 degrees Fahrenheit by mid-century is all but certain, and that will have a big impact on the state’s water supplies, state officials said, reinforcing the results of a series of studies all showing that rising temperatures will reduce the amount of water in many of Colorado’s streams and rivers, melt mountain snowpack earlier in the spring, and increase the water needed by thirsty crops and cities. Continue reading
Filed under: climate and weather, Colorado, Environment, global warming, rivers, water | Tagged: climate change, Colorado, Environment, global warming, stream flows, water | Leave a comment »
Posted on July 31, 2014 by Bob Berwyn
Near critical shortages in California prompt action
Heading downstream … bberwyn photo.
By Summit Voice
FRISCO — With Colorado River water supplies disappearing at a dizzying rate, and with a thirsty — and politically mighty — California parched by drought, the biggest water users at the table said this week they’ll invest $11 million to try and conserve significant amounts of water across all sectors, including including agricultural, municipal and industrial uses.
The Central Arizona Project, Denver Water, The Metropolitan Water District of Southern California and Southern Nevada Water Authority all signed on to what is being presented as a landmark water conservation agreement aimed at demonstrating “the viability of cooperative, voluntary compensated measures,” according to a press release from Denver Water. Continue reading
Filed under: Colorado, Colorado River, Environment, politics, rivers, water | Tagged: Colorado River, Colorado River Basin, conservation, Denver Water, drought, water | Leave a comment »
Posted on July 25, 2014 by Bob Berwyn
No room for mistakes in the Colorado River Basin.
Conservation has to be the centerpiece of local, state and regional water planning efforts
By Bob Berwyn
FRISCO — When Congress 93 years ago formally renamed the Grand River as the Colorado, it probably didn’t have any inkling about what the mightiest river in the West would be subjected too early in the 21st century.
Now far removed from that era of hopeful development, the river is over-exploited from beginning to end. Headwater streams are diverted to water acres of bluegrass lawns in Denver, and mountain resorts mindlessly draw down tributaries for snowmaking during the low-flow season, just when trout most need the water.
Just this week, scientists said they’ve documented an astounding rate of water loss in the basin from groundwater pumping alone, which may turn out to be a worse problem than we think, groundwater development is state-regulated, therefore not as closely tracked as the diversions and storage related to major reservoir operations.
And all the pressures have intensified in recent years: More population growth, more development, more demand for food and irrigation, a 14-year dry spell across the West and a warming climate. Even without manmade global warming, ancient trees tell us that the region has seen longer and more intense droughts in the past few thousand years.
The Colorado is tapped out. Continue reading
Filed under: Colorado, Colorado River, Environment | Tagged: Colorado River, Colorado River Day, Environment, water | 1 Comment »
Posted on July 10, 2014 by Bob Berwyn
Colorado business community weighs in on water principles
FRISCO — Vail and Eagle County residents will have a chance to get up to speed on an emerging state water plan today (July 10), with a lunchtime briefing at Donovan Pavilion in Vail, 12 p.m. to 1:30 p.m.
Gov. John Hickenlooper ordered work to begin on the statewide water plan in May 2013; a draft is due to the Governor’s Office no later than Dec. 10, 2014, with the final plan complete by December 2015.
Business leaders have developed statewide business community water policy principles to be part of Colorado’s Water Plan and are seeking regional input to finalize the principles. Working through local business chambers, this statewide initiative seeks local feedback on the principles, which address the business and economic development needs of Colorado.
- Tom Binnings of Summit Economics will discuss the economics of water from a statewide perspective.
- Linn Brooks of Eagle River Water & Sanitation District will share local water operations and policy, and discuss needs in the Eagle and Colorado River basins.
- James Eklund, executive director of the Colorado Water Conservation Board – the state agency tasked with drafting the Colorado Water Plan.
- Bryan Blakely of Accelerate Colorado and Mizraim Cordero of the Colorado Competitive Council will discuss the business community water policy principles.
Filed under: Colorado, Colorado River, Environment, politics, rivers, water, water quality | Tagged: Colorado, Colorado River, Eagle River, state water plan, Vail, water | Leave a comment »
Posted on June 23, 2014 by Bob Berwyn
More water from the West Slope? Not the best idea, says the U.S. Forest Service. bberwyn photo.
Current plan underestimates impacts to water and wildlife
By Bob Berwyn
FRISCO — As currently spelled out, Denver Water’s plan to divert more water from the headwaters of the Colorado River will result in unacceptable impacts to wildlife and other resources on publicly owned national forest lands, the U.S. Forest Service wrote in a June 9 comment letter to the U.S. Army Corps of Engineers.
The Forest Service also wrote that the creation of a pool of environmental water in an expanded Gross Reservoir doesn’t compensate for the loss of two acres of wetlands and 1.5 miles of stream habitat that will be lost as a result of the expansion. Continue reading
Filed under: Colorado, Environment, public lands, rivers, US Forest Service, water | Tagged: Colorado, Forest Service, Moffat Tunnel collection system expansion, water | Leave a comment »
Posted on June 19, 2014 by Bob Berwyn
EPA raises questions about compliance with Clean Water Act
Denver Water plans to increase transmountain diversions through the Moffat collection system is not drawing rave reviews, as numerous entities have expressed significant concerns about impacts to water quality. bberwyn photo.
By Bob Berwyn
FRISCO — For all the detailed information in the 16,000-page study for Denver Water’s proposed new water diversions from the Western Slope, there are still more questions than answers, according to formal comment letters filed in the past few weeks.
As currently configured, the proposal to shunt more water from Colorado River headwaters streams to the Front Range could worsen water water quality in many streams that are already feeling the pain of low flows, EPA water experts wrote in a June 9 letter. Continue reading
Filed under: Colorado, Colorado River, Environment, rivers, water, water quality, wetlands | Tagged: #Cowater, Colorado, Denver Water, EPA, Moffat Tunnel collection system expansion, water | 2 Comments »