Rivers of the Udmurt Republic

The Kama (KA-mə, KAH-mə; Russian: Кама Udmurt: Кам), also known as the Chulman (chool-MAHN; Tatar: Чулман / Çulman), is a 1,805-kilometre (1,122 mi) long river in Russia. It has a drainage basin of 507,000 square kilometres (196,000 sq mi). It is the longest left tributary of the Volga and the largest one in discharge. At their confluence, in fact, the Kama is even larger in terms of discharge than the Volga.

The Piz (Russian: Пизь) is a right tributary of the river Buy in Perm Krai, the Republic of Bashkortostan and the Republic of Udmurtia, Russia. It is 151 kilometres (94 mi) long, with a drainage basin of 2,210 square kilometres (850 sq mi). It starts in the Yelovsky District of Perm Krai, then flows through Chaikovsky District on the border with Bashkortostan. It empties into the Buy on the border between the Udmurt Republic and Bashkortostan, 20 kilometres (12 mi) from the larger river's mouth.

The Siva (Russian: Сива) is a river in Udmurt Republic and Perm Krai in Russia, a right-bank tributary of the Kama. The river is 206 kilometres (128 mi) long, and its drainage basin covers 4,870 square kilometres (1,880 sq mi). It starts in the Chastinsky District, near the village of Pikhtovka. Then it flows through the Bolshesosnovsky District of Perm Krai and the Votkinsky District of Udmurtia. Its mouth is downstream of the dam of Votkinsk Hydroelectric Station. The Siva freezes up in the second half of October and remains icebound until April.

The Buy (Russian: Буй; Bashkir: Беүә, Bewä) is a river in Perm Krai, the Republic of Bashkortostan and the Republic of Udmurtia, Russia. It is a left tributary of the Kama. It is 228 kilometres (142 mi) long, with a drainage basin of 6,530 square kilometres (2,520 sq mi).

The Izh (Russian: Иж; Udmurt: Оӵ, Oč; Tatar: Иж, İj) is a river in Udmurtia and Tatarstan, Russian Federation, a right-bank tributary of the Kama. It is 259 kilometres (161 mi) long, of which 97 kilometres (60 mi) are in Tatarstan, and its drainage basin covers 8,510 square kilometres (3,290 sq mi). It begins near Malye Oshvortsy, Udmurtia and falls to the Nizhnekamsk Reservoir, Kama River, near Golyushurma tract in Agryzsky District, Tatarstan.

The Cheptsa (Russian: Чепца; Udmurt: Чупчи) is a river in the north part of Udmurtian Republic (Udmurtia) and eastern Kirov Oblast, in Russia. It flows through the city Glazov and flows into the Vyatka in Kirovo-Chepetsk, east of Kirov. It is 501 kilometres (311 mi) long, and its drainage basin covers 20,400 square kilometres (7,900 sq mi).

The Vyatka is a river in Kirov Oblast and Tatarstan in Russia. It is a right tributary of the Kama. It is 1,314 kilometres (816 mi) long, and its drainage basin covers 129,000 square kilometres (50,000 sq mi).

The Uyvayka (Russian: Уйвайка, also: Увайка - Uvayka) is a river in Udmurtia, Russia, which flows through the Yakshur-Bodyinsky and Uvinsky Districts. The mouth of the river is 99 km along the right bank of the Uva. The length of the river is 15 km, and the catchment area is 69.6 km².

The Kilmez (Russian: Кильмезь; Udmurt: Калмез) is a river in Udmurtia and Kirov Oblast in Russia, a left tributary of the Vyatka. The river is 270 kilometres (170 mi) long, and the area of its drainage basin is 17,200 square kilometres (6,600 sq mi). The Kilmez freezes over in November and remains icebound until the second half of April. Its main tributaries are the Lumpun, Loban, and Vala.

The Toyma (Russian: Тойма; Tatar: Туйма) is a river in Udmurtia and Tatarstan, Russian Federation, a right-bank tributary of the Kama. It is 121 kilometres (75 mi) long, of which 84 kilometres (52 mi) are in Tatarstan, and its drainage basin covers 1,450 square kilometres (560 sq mi). It begins in Udmurtia and falls to the Kama near Yelabuga, Tatarstan.