Bezdna (Tatarstan)

The Bezdna is a river in Tatarstan, Russian Federation, a left-bank tributary of the Volga, flowing into the Kuybyshev Reservoir near Kuralovo, Spassky District. It is long, and its drainage basin covers.
The maximal mineralization is 300–500 mg/L. The average sediment deposition at the river mouth is per year. In 1963 the average discharge was. The town of Spassk, the ancestor of modern Bolgar stood on the river prior to 1956. In 1956–57 the Kuybyshev reservoir was created, flooding the town and the lower stream of Bezdna.