The Bolshaya Chukochya or Chukochya (Russian: Большая Чукочья; Chukot: Рэвум-Рэву)[1] is a river in the Sakha Republic (Yakutia) of the Russian Federation. It is 758 kilometres (471 mi) long, and has a drainage basin of 19,800 square kilometres (7,600 sq mi).[2]

Bolshaya Chukochya Большая Чукочья / Рэвум-Рэву
Location of the Bolshaya Chukochya in Far-East Siberia
Mouth location in Yakutia, Russia
Location
Country	Russia
Physical characteristics
Source
• location	Usun-Kyuel
• coordinates	68°02′56″N 155°41′33″E
• elevation	44 m (144 ft)
Mouth	East Siberian Sea
• coordinates	70.0911°N 159.9269°E / 70.0911; 159.9269
• elevation	0 m (0 ft)
Length	758 km (471 mi)
Basin size	19,800 km2 (7,600 sq mi)

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 west of the mouths of the Kolyma. 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.[3]

Tributaries

The main tributaries of the Bolshaya Chukochya are the 229 km (142 mi) long Olyor (Олёр) and the 121 km (75 mi) long Semen-Yuryakh (Семен-Юрях) on the left, as well as the 106 km (66 mi) long Savva-Yuryakh (Савва-Юрях) on the right. There are more than 11,500 lakes in the Bolshaya Chukochya basin, totaling an area of 3,600 km² (1,400 sq mi).[2][4][5]

Ecology

The Kolyma Lowland, 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.[6]

Fossil insects, early Pleistocene equids and mammoths have been found in the basin of the Bolshaya Chukochya.[7]

See also

• List of rivers of Russia

References

Further reading

• Belolyubsky, I.N.; Grinenko, O.V. (2001). "Biostratigraphy of the Late Cenozoic East Siberia (Yakutia)". Gondwana Research. 4 (4): 575. Bibcode:2001GondR...4Q.575B. doi:10.1016/S1342-937X(05)70378-6.
• "Palaeogeography, Palaeoclimatology, Palaeoecology: Late Tertiary". doi:10.1016/j.palaeo.2006.04.002. {{cite journal}}: Cite journal requires |journal= (help)

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На других языках

[de] Große Tschukotschja

[it] Bol'šaja Čukoč'ja

[ru] Большая Чукочья