Toyma
The Toyma (; ) is a river in Udmurtia and Tatarstan, Russian Federation, a right-bank tributary of the Kama. It is long, of which are in Tatarstan, and its drainage basin covers . 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 in 1979. Drainage is regulated. Average sediment accumulation at the mouth per year is . Since 1978 it is protected as a "natural monument of Tatarstan". Mendeleyevsk and Yelabuga are along the river.