Russian rivers

… and river systems

I  White Sea

Northern Dvina (from confluence of Yug and Sukhona; the Western Dvina or Daugava flows into Latvia from the Valdai Hills)

II  Barents Sea

III  Kara Sea, between Novaya Zemlya and Severnaya Zemlya

Ob (from confluence of Katun and Biya near Altai Mountains in Russia)

Yenisei (from Mongolia)

IV  Laptev Sea, between Severnaya Zemlya and New Siberian Islands

Lena (from near Lake Baikal)

V  East Siberian Sea, between New Siberian Islands and Wrangel Island

Kolyma (from confluence of Kulu and Ayan Yuryakh)

VI  Chukchi Sea, between Wrangel Island and Bering Strait

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VII  Baltic Sea

Neva (from Lake Ladoga)

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VIII  Black Sea, Ukraine, west of Crimea

Dnieper (from Valdai Hills near Smolensk)

IX  Sea of Azov, Russia, east of Crimea

Don (from Novomoskovsk)

X  Caspian Sea, Russia

Volga (from Valdai Hills)

XI  Caspian Sea, Kazakhstan

Ural or Zhayyq (from southern Urals in Russia)

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XII  Bering Sea, south of Bering Strait

XIII  Sea of Othotsk, south of Kamchatka Peninsula

XIV  Strait of Tartary, between Siberia and Sakhalin Island

Amur (from northwestern Manchuria on the Russia-China border at confluence of Shilka and Argun)

XV  Sea of Japan, south of Sakhalin Island

Tumen (from Mount Paektu, but in North Korea or China?)

Other rivers are less important or are parts of these systems

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Most of the Russia-China border is formed by the Argun and the Amur and in the south the Ussuri, a tributary of the Amur (low resolution map: Economist)

Smoke over the Volga, Nizhny Novgorod

Tibetan rivers (old post)