Kubnya

The Kubnya (Кубня; Кĕтне, Kĕtne; Гөбенә) is a river in Chuvashia and Tatarstan, Russian Federation, a left-bank tributary of the Sviyaga. It is 176 km long, of which 121 km are in Tatarstan, and its drainage basin covers 2480 km2. It begins in Chuvashia and flows to the Sviyaga 4 km south of Burunduki.

A major tributary is the Uryum. The maximal mineralization is 500-800 mg/L. The average sediment deposition at the river mouth per year is 92 mm. The maximal water discharge is 420 m3/s. Drainage is regulated. Since 1978 it is protected as a natural monument of Tatarstan.