The Oka (Russian: Ока, Buryat: Аха, romanized: Akha) is a river in Siberia, left tributary of the Angara. It is 630 kilometres (390 mi) long, and has a drainage basin of 34,000 square kilometres (13,000 sq mi).[1]

Oka
Oka (Angara) is located in Irkutsk Oblast
Oka (Angara)
Mouth location in Irkutsk Oblast, Russia
Location
CountryRussia
Physical characteristics
Source 
 • locationOka Plateau, Sayan Mountains
MouthAngara
 • location
Bratsk Reservoir
 • coordinates
55°30′55″N 102°20′54″E / 55.51528°N 102.34833°E / 55.51528; 102.34833
Length630 km (390 mi)
Basin size34,000 km2 (13,000 sq mi)
Basin features
ProgressionAngaraYeniseyKara Sea

Course

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It originates in the Oka Lake, Oka Plateau, Sayan Mountains at the western end of Buryatia. It flows roughly northwestwards with the Bolshoy Sayan to the southwest. After it bends northeastwards the river flows between the Kropotkin Range and the Belskye Goltsy (Бельские Гольцы). After the Khoyto-Oka tributary joins it from the left it enters Irkutsk Oblast and flows in a roughly more northern direction. Finally the Oka discharges into the Bratsk reservoir.[2][3][4]

See also

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References

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  1. ^ "Река Ока (Аха) in the State Water Register of Russia". textual.ru (in Russian).
  2. ^ "N-47 Chart (in Russian)". Retrieved 7 December 2021.
  3. ^ Google Earth
  4. ^ Water of Russia - Ока