The Ebro River Delta, located along the eastern coast of Spain, is one of the largest wetland areas in the western Mediterranean region.
Published Jul 26, 2004
One of Africa’s largest river systems reaches the Indian Ocean with less water and sediment today than in the past.
Published Dec 12, 2013
Water travels from the Angolan Highlands to Botswana each year, usually arriving in July. In 2012, the water showed up early, and overflowed into the Savuti River.
Published Jun 5, 2012
The Volga Delta has grown significantly over the past 130 years.
Published Nov 12, 2018
Spain's Ebro Delta has recently experienced tremendous shape-shifting.
Published Mar 13, 2018
The Colorado River is the largest watershed in the southwestern US, emptying into the Salton Trough before reaching the Sea of Cortez. Over the past 2-3 million years, river sediments built a delta that extends from the US-Mexico border for a distance of 87 miles (140 kilometers). However, today the Colorado River delta is undergoing significant erosion and diminishing in size due to the lack of sediment replenishment from upstream sources.
Published Jun 28, 2004
The Ural River is one of the two major rivers (the other is the Volga) that empty into the northern coast of the Caspian Sea, creating extensive wetlands. This image shows details of the Ural’s tree-like (or “digitate”) delta. This type of delta forms naturally when wave action is low, and sediment content in the river is high. New distributary channels form in the delta when the river breaches natural levees created by sediment deposition. The long main channel of the river in this image and several of the distibutary channels are too regular to be entirely natural, however. Like the famous Mississippi River delta in the United States, the Ural River delta has been significantly modified to reduce flooding and divert water.
Published Jun 6, 2005
Heavy rain and melting snow drove rivers across Central Europe over their banks in early April 2006.
Published Apr 21, 2006
Faults and tides have helped to shape the rivers of this delta in East Malaysia.
Published Mar 6, 2018
This wetland in the interior of Botswana is an oasis for biodiversity in the midst of the arid Kalahari Desert.
Published Jul 28, 2014
Sometimes called the Jewel of the Kalahari, the area is an enormous, pristine wetland that almost miraculously appears out of a desert.
Published Jun 27, 2011
Time, weather, and human intervention have all shaped the Mississippi Delta in Louisiana, a giant bird’s foot shape protruding into the Gulf of Mexico. The Mississippi River deposits sediment into the ocean, and over 25 years, NASA Landsat satellites observed changes in the delta’s shape.
Published Oct 7, 2007
