Acquired April 2, 2011, and February 27, 2011, these natural-color images show rising waters on the Kuiseb River, which flowed all the way to the Atlantic Ocean for the first time in decades.
The Selenga River Delta, which stretches out into Russia’s Lake Baikal, is carved by an intricate network of channels and levees and surrounded by marshlands.
As they prepare for a satellite that will measure the height and areal extent of rivers in unprecedented detail, hydrologists have released a better map of North American river widths.
The Salmon River in Idaho, one of the longest free-flowing rivers in the United States, rushes through a geologic wonderland of wooded ridges, eroded bluffs, and stone towers and crags.