New study helps resource managers plan for climate change
Resource managers grappling with the vexing question of how to allocate Colorado River water to the thirsty cities, ranches and farms of the Southwest have some new food for thought. A new U.S. Geological Survey study published this week in the journal Water Resources Research shows that more than half the streamflow in Upper Colorado River Basin originates as groundwater.
Much of West reports record-fast meltdown under El Niño heat
April storms helped boost Colorado’s statewide snowpack to above average, but two river basins in the southern part of the state continue to report below normal readings.
The state’s mountain areas benefited the most from a series of wet, El Niño-fueled storms, bringing precipitation for the water year to average, according to Brian Domonkos, the Colorado snow survey supervisor for the USDA Natural Resources conservation service.
“At this time last year the water supply outlook was grim at best,” Domonkos said. “Colorado’s current snowpack and precipitation levels are right where we want to be this time of year. Elsewhere in the Western United States seasonal snowpack during 2016 succumbed to early spring warming and did not recover as Colorado did from recent storms,” he added. Continue reading “April storms boost Colorado snowpack”→
City takes big step toward more sustainable water use
Denver, Colorado took a big step toward meeting an ambitious 20 percent water conservation target by passing an ordinance authorizing the use of gray water for residential, commercial and industrial purposes. The city hopes to cut per capita use of potable water by 20 percent by 2020.
Enabling large water users like hotels, multi-family residential complexes and dormitories, as well as industrial facilities, to use gray water will not only help conserve a valuable resource, it will help those facilities save money. Continue reading “Denver authorizes gray water program”→
Using a vast sample of data collected in a citizen science project, researchers say they’ve been able to discern how hydropeaking affects aquatic insects that form the base of river food chains. The information could help resource managers develop alternative hydropower practices that aren’t as harmful to ecosystems, according to a new study published in the journal BioScience.
Hydropeaking refers to the practice of increasing river flows at times of peak demand, generally during the day. This study shows how abrupt water level changes affect aquatic insects in every stage of life. The research was done by scientists with the U.S. Geological Survey, Oregon State University, Utah State University and Idaho State University. Continue reading “Environment: Can dams be operated without killing rivers?”→
After taking a big-picture look at the water cycle, U.S. Forest Service researchers say global warming may decrease the amount of water produced by forests and grasslands across the country — even with increases in precipitation.
Colorado’s continued unsustainable use water has taken a toll on trout in the Blue River, where Colorado Parks and Wildlife biologists have decided to remove the gold medal designation from a 19-mile reach stretching from just north of Silverthorne to Green Mountain Reservoir.
According to CPW aquatic biologist Jon Ewert, unnatural stream flows, sparse aquatic invertebrate populations, low nutrient content and degraded habitat all contributed to the decline of the fishery. The agency said that stretch of the river hasn’t met the Gold Medal standard for about 15 years.
There’s better news farther downstream, where CPW designated a 24-mile reach of the Colorado River, from Canyon Creek, at the mouth of Gore Canyon, to the confluence of Rock Creek, near the town of McCoy, as a new gold medal fishery. In Colorado, Gold Medal status is reserved for state waters that produce a minimum of 60-pounds of trout per acre and 12 trout measuring 14-inches or longer per acre. Continue reading “Blue River loses gold medal trout stream designation”→