Siva River (Сива) is a river in Udmurt Republic and Perm Krai in Russia, a right tributary of the Kama River. The length of the river is 206 km, the area of its drainage basin is 4,870 km². It starts in Chastinsky District, near village Pikhtovka. Then, it flows through Bolshesosnovsky District of perm Krai and Votkinsky District of Udmurtia....