Kolva
The 770th longest river in the world
The Kolva is a river in Nenets Autonomous Okrug and the Komi Republic in Russia. It is a right tributary of the Usa of the Pechora basin. The length of the river is 564 km (350 mi). The area of its basin 18,100 km2 (7, 000 sq mi). The Kolva freezes up in late November and stays under the ice until mid-May.
Flows through: Russia.
River data from Wikidata (CC0); lengths normalised to a common unit.