Siun

a river in the Bashkir ASSR and the Tatar ASSR; a left tributary of the Belaia River of the Volga River basin. The Siun’ measures 209 km in length and drains an area of 4,500 sq km. It originates on the Bugul’ma-Belebei elevation. The river is fed primarily by snow. High water lasts from mid-April to mid-May. The mean flow rate is 14.8 cu m per sec.