usgs

The Missing Colorado River Delta: Rivers, Borders, and Maps

Water flows downhill, and you wouldn’t think that rivers would stop for political boundaries, not even when national borders intersect a river channel’s natural course.  The Mekong flows through China, Laos, Burma, Thailand, Vietnam, and Cambodia before it ...

A New Check-Up on the Health of U.S. Rivers

Thanks in large part to the Clean Water Act, many rivers in the United States are cleaner now than when Ohio’s Cuyahoga River caught fire on a Sunday morning in June 1969. But the vast majority of the nation’s ...