Oka (Angara)

See also: Oka (river)

Oka
Mouth location in Irkutsk Oblast, Russia
Location
Country	Russia
Physical characteristics
Source
• location	Oka Plateau, Sayan Mountains
Mouth	Angara
• location	Bratsk Reservoir
• coordinates	55°30′55″N 102°20′54″E
Length	630 km (390 mi)
Basin size	34,000 km^2 (13,000 sq mi)
Basin features
Progression	Angara→ Yenisey→ Kara Sea

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]

Course

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

• List of rivers of Russia

References

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