Subscribe
Subscribe
MY AMERICAN SCIENTIST
LOG IN! REGISTER!
SEARCH
 
Logo IMG
HOME > MULTIMEDIA > Multimedia Detail

SCIENCE IN THE NEWS DAILY

Dam's Flow Limit Loosened to Feed Grand Canyon

from the New York Times (Registration Required)

The Interior Department announced a plan on Wednesday to allow periodic increases in the flow of Colorado River water through the Grand Canyon, alleviating the environmental disruption caused by the construction of the Glen Canyon Dam in Arizona in the 1960s.

The secretary of the interior, Ken Salazar, said the plan would allow the river's managers to release excess water--more than twice as much as average flows--through and over the hydroelectric dam at will to help propel silt and sediment downstream into the canyon. By mimicking the river's original dynamics, Interior Department officials said, the flows could help restore the backwater ecosystems in which native fish are most at home.

The goal is partly to enhance sandbars that create backwaters for an endangered fish, the humpback chub. The excess sand also nourishes beaches used by wildlife, hikers and rafters. Environmental groups like the Grand Canyon Trust strongly support the high-flow releases, which have been carried out experimentally three times before, most recently in 2008.

Read more...


comments powered by Disqus
 

Connect With Us:

Facebook Icon Sm Twitter Icon Google+ Icon Pinterest Icon RSS Feed Instagram Icon

Latest Multimedia

2015-08WyskMMClick to Enlarge Image

PODCAST & VIDEO: 3D Printing Replacement Body Parts

Regenerative medicine, a fledgling field with the aim of regrowing parts from a person’s own cells, is being amplified with 3D-printing technology, which can now use organic materials to create scaffolds that cells need to grow into their final forms. Richard Wysk, a professor of industrial and systems engineering at North Carolina State University, discusses the latest successes with this research, and the timeline for creating more complicated structures.

To view all multimedia content, click "Latest Multimedia."



RSS Feed Subscription

Receive notification when new content is posted from the entire website, or choose from the customized feeds available.


EMAIL TO A FRIEND :

Of Possible Interest

Science In The News Daily: Dam Removal to Help Restore Spawning Grounds

Science In The News Daily: A Three-Way Partnership at the Bottom of the Sea

Science In The News Daily: EPA Issues New Soot Regulations

Subscribe to American Scientist