The Delta of the largest river in Europe
The Delta of the largest river in Europe
An astronaut on board the International Space Station took this picture of the Volga River delta, which stretches for 160 kilometers (100 miles) through Russia's Astrakhan Oblast. It's the one in Europe. Greater river delta, located where the Volga pours its fresh water and sediments in the northwest sector of the Caspian Sea.
During the last century, the Volga Delta has grown from 3,222 square kilometers (1,244 square miles) in 1880 to 27,224 square kilometers (10,511 square miles) today. This significant growth is due both to changes in sea level in the Caspian and to the broad and gentle slope of the delta. When the water of the river enters the delta, it is divided into hundreds of waterways, creating one of the most complicated in the world. hydrographic networks. The upper delta houses several cities and towns, including the city of Astrakhan, which is 100 kilometers (60 miles) from the coast.
The delta is made up of three different zones. The first and most prominent includes the highest areas of the delta, which are dominated by linear mounds and basins known as "Ilmens. "These parallel mounds range from 400 meters (1,300 feet) to 10 kilometers (6 miles) in length and have a height of up to 8 meters (26 feet). They run from east to west through the delta and are composed of clay-rich sands.
The second deltat zone has a very low relief and is the site of active and abandoned water channels. The third zone is the submarine portion of the delta and is composed of a wide platform that extends from 30 to 60 kilometers (20-40 miles) on the high seas.
The Volga Delta is home to countless wildlife species protected in the Astracán State Nature Reserve, established in 1919. There are 283 registered bird species (155 of which migrate to the delta from March to November) and at least 50 different species of fish. The reservation was dedicated as Site of Wetlands of International Importance in 1976 and added to the World network of biosphere reserves in 1984.
Astronaut photograph ISS048-E-63048 was acquired on August 21, 2016 with a Nikon D4 digital camera with a 78-millimeter lens and is provided by the Earth Observation Installation of the ISS crew and the Remote Sensing and Earth Science Unit, Center Space Johnson The image was taken by a member of the Expedition 48 crew. The image has been trimmed and enhanced to improve contrast, and the lens artifacts have been removed. the International space station program supports the laboratory as part of the National Laboratory of the ISS to help astronauts take photographs of the Earth that will be of great value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be seen at NASA / JSC Gateway to the astronaut photography of the earth. Legend of Sarah Deitrick, Jacobs, JETS contract at NASA-JSC.
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