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The water level change within the Caspian Sea is an indirect reason for which plants may not get established. These affect aquatic plants of the Volga Delta, such as Aldrovanda vesiculosa and the native Nelumbo caspica. About 11 plant species are found in the Samur River delta, including the unique liana forests that date back to the Tertiary ...
The Caspian's water levels, which have fluctuated sharply during the last century, have been falling since the mid 1990s, scientific studies have found. ... discussed with Russian President ...
To fill the Caspian basin to a level of more than 50 metres (160 ft) would require as much as 70,000 km 3 of water, equivalent to 200 years of river discharge into the Caspian Sea. Water flowed through the Manych Spillway (250 to 1,000 km 3 per year) and some (more than 100 km 3 per year) was lost through evaporation. Water may have come from:
The delta is located in the Caspian Depression—the far eastern part of the delta lies in Kazakhstan. The delta drains into the Caspian approximately 60 km (37 mi) downstream from the city of Astrakhan. The Volga delta has grown significantly in the 20th century because of changes in the level of the Caspian Sea.
The course change is believed to be the result of a rise in the level of the Caspian Sea coupled with a major flood of the Kura. [ 16 ] About 174 kilometres (108 mi) of the river is in Turkey, 435 kilometres (270 mi) in Georgia, and 906 kilometres (563 mi) in Azerbaijan.
Hydraulic structures and sea level rise also play a role in the loss of the delta. [22] The Volga Delta is formed when the Volga River enters into the Caspian Sea in Russia. It has gained land with the drop in the level of the Caspian Sea. As the water level has risen again in the last twenty years, the delta has still not experienced any loss.
Subtle changes due to falling sea level (in the Caspian Sea) can be seen along this coastline. Air and water pollution are widespread and pose great challenges to economic development. [ 1 ] Major sources of pollution include oil refineries and chemical and metallurgical industries, which in the early 1990s continued to operate as inefficiently ...
The Sea of Azov rose so high that it overflowed into the Caspian Sea. [dubious – discuss] The rise was extremely rapid and the Caspian basin could not contain all the floodwater, which flowed from the northwest coastline of the Caspian Sea, through the Kuma-Manych Depression and Kerch Strait into the Black Sea basin. By the end of the ...