Oka (Angara)

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).

Oka
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
Length630 km (390 mi)
Basin size34,000 km2 (13,000 sq mi)
Basin features
ProgressionAngaraYeniseyKara Sea
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