Oka River (Siberia)
The Oka above the confluence of the Schombolok
Location of the Oka in the catchment area of the Angara
The Oka rises in the west of the Republic of Buryatia in the eastern part of the Ostsajans. Your source is located about 30 km north- northeast of the 3492 m high mountain Munku Sardyk in small Okinskoje Lake.
The Oka flows north into the extreme south of the Central Siberian Uplands. She flows in otherwise hardly populated areas in the Irkutsk Oblast, among other things, the city Sima.
The lower reaches of the river lies in the dam area of the Bratsk reservoir of the Angara.
Catchment and inflows
The catchment area of Oka is 34,000 km ². Its tributaries include with orographic mapping (l = left side, R = right side), river length, Mündungsort with Okaflusskilometer and - if known - catchment size, among other things ( downriver considered ):
- Dibi ( l, 100 miles) above Orlik, km 519; 1510 km ²
- Tissa ( l, 117 km), below Orlik, km 501; 3020 km ²
- Cholto - Oka ( l, 108 miles), far below Khuzhir, km 372; 2430 km ²
- Tagna (r; 158 km), slightly above Sima, km 178; 2550 km ²
- Sima ( l, 207 km), just above Sima, km 139; 4460 km ²
- Kimiltey ( l, 141 km), slightly below Sima, near Kimiltey, km 92; 3220 km ²
- Alka ( l, 93 miles), some below Sima, near Ujan, km 62; 989 km ²