Scheme of the Kama River Basin.
|Origin||Upper Kama Upland|
|Length||267 km (166 mi)|
|Basin area||10,300 km2 (4,000 sq mi)|
Kosa River (Russian: Коса, Komi: Кöсва) is a river in Perm Krai, Russia, right tributary of the Kama River. The length of the river is 267 km, the area of its basin is 10,300 km². The Kosa River freezes up in late October - November and stays icebound until April - early May. It starts in extreme south of Kosinsky District and flows in north. Mouth of river located near village Ust-Kosa. Banks are lowland. There are swamp Ydzhidnyur in the basin of Kosa.
- Left: Yancher, Sepol, Onolva, Lolog, Odan, Sym
- Right: Yum, Lopva, Lopan, Lolym, Siya, Bulach.
Name of the river is composition of Komi-Permyak words ‘kös’ (dry) and ‘va’ (water), that can be translated as ‘dry water’. Komi-Permyak people call the river ‘Kösva’.
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