Click to enlarge — Photo Essay by Rick Wilking
Where the Colorado River falls from the snow-capped Rocky Mountains into the arid U.S. Southwest, lies Lake Powell.
More than 150 meters deep in places and with narrow side canyons, the shoreline of the lake is longer than the entire West Coast of the United States. It extends upstream into Utah from Arizona’s Glen Canyon Dam and provides water for Nevada, Arizona and California.
But a severe drought in recent years, combined with the tapping of the lake’s water at what many consider to be an unsustainable level, has reduced its levels to only about 42 percent of its capacity, according to the U.S. space agency NASA…
Scientists from NASA and Cornell and Columbia universities warned earlier this year that the U.S. Southwest and Central Plains regions are likely to be scorched by a decades-long “megadrought” during the second half of this century if climate change continues unabated.
Forecasting that there is an 80 percent chance of an extended drought in the area between 2050 and 2099 unless aggressive steps are taken to mitigate the impacts of climate change, the researchers said their results point to a challenging – and remarkably drier – future.
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