The Andi Koysu (russian: Андийское Койсу - ''Andiyskoye Koysu'', ka, ანდის ყოისუ - ''Andis Qoisu'') is a river in

Dagestan Dagestan ( ; rus, Дагеста́н, , dəɡʲɪˈstan, links=yes), officially the Republic of Dagestan (russian: Респу́блика Дагеста́н, Respúblika Dagestán, links=no), is a republic of Russia situated in the North Ca ...

(

Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-ei ...

) and

Georgia Georgia most commonly refers to: * Georgia (country), a country in the Caucasus region of Eurasia * Georgia (U.S. state), a state in the Southeast United States Georgia may also refer to: Places Historical states and entities * Related to the ...

. It starts at the confluence of the rivers Pirikiti Alazani and Tushetis Alazani, near Omalo in the Tusheti region of Georgia. It is long or including its longest source river, Tushetis Alazani, and its

drainage basin A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, ...

covers .Koysu
in

Great Soviet Encyclopedia The ''Great Soviet Encyclopedia'' (GSE; ) is one of the largest Russian-language encyclopedias, published in the Soviet Union from 1926 to 1990. After 2002, the encyclopedia's data was partially included into the later ''Bolshaya rossiyskaya e ...

At its confluence with the Avar Koysu, near the village Gimry in central Dagestan, it forms the river Sulak.

References

Rivers of Dagestan Rivers of Georgia (country) International rivers of Europe International rivers of Asia {{Russia-river-stub