Vasyugan Plain
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The Vasyugan Plain or Vasyuganye (Russian: Васюганье) is the vast area of the Ob-Irtysh interfluve that covers the basin of the Vasyugan river. It is part of the West Siberian Plain and lies within the Novosibirsk, Omsk, and Tomsk oblasts of Russia.[1] To the south it transitions into the Baraba Steppe (Baraba Lowland).[2] Most of its territory is occupied the Vasyugan Swamp.[3]

The nearly circular area around Vasyugan is known as Vasyugan steppe or Vasyugan tundra.[4]
The Vasyugan nature reserve of area 614,803 hectares is in the middle of the plain,[5] established on December 16, 2017.[6] It includes areas of the Vasyugan Swamp.