Toyma

The Toyma (Тойма; Туйма) is a river in Udmurtia and Tatarstan, Russian Federation, a right-bank tributary of the Kama. It is 121 km long, of which 84 km are in Tatarstan, and its drainage basin covers 1450 km2. It begins in Udmurtia and falls to the Kama near Yelabuga, Tatarstan.

Major tributaries are the Vozzhayka, Yurashka, Karinka rivers. The maximal mineralization 400–600 mg/L. The maximal water discharge was 533 m3/s in 1979. Drainage is regulated. Average sediment accumulation at the mouth per year is 146 mm. Since 1978 it is protected as a natural monument of Tatarstan. Mendeleyevsk and Yelabuga are along the river.