Tag: rivers

Most large rivers don’t flow freely anymore

Of the 246 rivers longer than 621 miles, only about a third flow freely across their entire length, according to the study, published Wednesday in the journal Nature. The rest are dammed, channelized, or otherwise heavily developed. “Our results are even worse than in the past,” says Bernhard Lehner, an author on the study and hydrologist at McGill University. “Fifteen years ago, researchers said about half of the large river basins in the world are impacted, and we now say two-thirds.”

Last Straw: How The Fortunes Of Las Vegas Will Rise Or Fall With Lake Mead

The bathtub ring can be seen for miles. The 120-foot-high band of rock, bleached nearly white by mineral-rich water, circles the shoreline of Lake Mead. Water levels have dropped by almost 100 feet in the past decade, and the ring has emerged as a stark reminder of the drought enveloping the American Southwest. It also […]