The Ganges River forms an extensive delta where it empties into the Bay of Bengal. The delta is
largely covered with a swamp forest known as the Sunderbans, which is home to the Royal Bengal
Tiger. It is also home to most of Bangladesh, one of the worlds most densely populated countries. Roughly 120 million people live on the Ganges Delta under threat of repeated catastrophic floods due to heavy runoff of meltwater from the Himalayas, and due to the intense rainfall during the monsoon season.
This image was acquired by
Landsat 7s Enhanced Thematic Mapper plus
(ETM+) sensor on February 28, 2000. This is a false-color composite image made using green, infrared, and blue wavelengths.
The Ebro River Delta, located along the eastern coast of Spain, is one of the largest wetland areas (320 km²) in the western Mediterranean region. The Ebro delta has grown rapidly—the historical rate of growth of the delta is demonstrated by the city of Amposta. This city was a seaport in the 4th Century, and is now located well inland from the current Ebro river mouth. The rounded form of the delta attests to the balance between sediment deposition by the Ebro River and removal of this material by wave erosion. This astronaut photograph, taken in partial sunglint, also shows the Ebro’s fresh water lens—the water density boundary between the upper layer of fresh water issuing from the Ebro River mouth and the saltier, denser Mediterranean Sea water.