The Bolshaya Chukochya or Chukochya (russian: Большая Чукочья; ckt, Рэвум-Рэву, ''Revum-Revu'') is a river in the

Sakha Republic Sakha, officially the Republic of Sakha (Yakutia),, is the largest republic of Russia, located in the Russian Far East, along the Arctic Ocean, with a population of roughly 1 million. Sakha comprises half of the area of its governing Far Eas ...

(Yakutia) of the Russian Federation. It is long, and has a drainage basin of .

Course

It has its sources in Lake Usun-Kyuel and crosses the tundra roughly northeastwards. In its lower course it flows south of Lake Bolshoye Morskoye. Finally it flows into the Kolyma Gulf of the

East Siberian Sea The East Siberian Sea ( rus, Восто́чно-Сиби́рское мо́ре, r=Vostochno-Sibirskoye more) is a marginal sea in the Arctic Ocean. It is located between the Arctic Cape to the north, the coast of Siberia to the south, the New Si ...

west of the mouths of the

Kolyma Kolyma (russian: Колыма́, ) is a region located in the Russian Far East. It is bounded to the north by the East Siberian Sea and the Arctic Ocean, and by the Sea of Okhotsk to the south. The region gets its name from the Kolyma River an ...

. Owing to its extreme northerly location the Bolshaya Chukochya freezes up in early October and remains icebound until June. The Bolshaya Chukochya basin is located between the basins of the Alazeya and the Kolyma. There are study sites near the Bolshaya Chukochya in order to investigate the mineral transformations in the soils affected by

permafrost Permafrost is ground that continuously remains below 0 °C (32 °F) for two or more years, located on land or under the ocean. Most common in the Northern Hemisphere, around 15% of the Northern Hemisphere or 11% of the global surface ...

Tributaries

The main tributaries of the Bolshaya Chukochya are the long Olyor (Олёр) and the long Semen-Yuryakh (Семен-Юрях) on the left, as well as the long Savva-Yuryakh (Савва-Юрях) on the right. There are more than 11,500 lakes in the Bolshaya Chukochya basin, totaling an area of .

Ecology

The

Kolyma Lowland The Kolyma Lowland (russian: Колымская низменность) is a lowland plain in the northeastern parts of Sakha Republic in the basin of the Alazeya, Bolshaya Chukoch'ya and lower reaches of the Kolyma rivers. The lowland is formed ...

, the area where the Bolshaya Chukochya flows, has many lakes and marshes. A great variety of birds, like Siberian cranes, waders and sandpipers, make their habitat in this riverine area. Fossil insects, early Pleistocene

equid Equidae (sometimes known as the horse family) is the taxonomic family of horses and related animals, including the extant horses, asses, and zebras, and many other species known only from fossils. All extant species are in the genus '' Equus'', w ...

s and mammoths have been found in the basin of the Bolshaya Chukochya.Fossil Coleoptera

Early Pleistocene equids (Perissodactyla)

/ref>

Course

Tributaries

Ecology

See also

References

Further reading