Wednesday, March 5, 2008

CNN: Manmade flood flows through Grand Canyon

Federal officials have started a flood in the Grand Canyon in hopes of restoring its ecosystem.

The canyon's ecosystem was permanently changed after the construction of the Glen Canyon Dam in 1963.

The Colorado River downstream used to be warm and muddy, but now it's cold and clear.
The shift helped speed the extinction of four fish species and push two others, including the endangered humpback chub, near the edge.