Syun
The Syun is a river in Bashkortostan and Tatarstan, Russian Federation, a left-bank tributary of the Belaya. It is long, of which are in Tatarstan. Its drainage basin covers.
Major tributaries in Tatarstan are the Kalmiya, Sikiya, Terpelya, Bezyada, and Sharan in Bashkortostan. The maximal water discharge is , and the maximal mineralization 500 to 1000 mg/L. Average sediment at the mouth per year is. Drainage is regulated. Since 1978 it is protected as a "natural monument of Tatarstan".