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Concept
Irtysh
Summary
The Irtysh (Ertis ügüzüg, Эрчис мөрөн, Erchis mörön, "erchleh", "twirl"; Иртыш; Ертіс, Ertis, هرتىس; Chinese: 额尔齐斯河, pinyin: É'ěrqísī hé, Xiao'erjing: عَعَرٿِسِ حْ; إيرتيش, Әртиш, Ertish; Иртеш, İrteş, يئرتئش, Siberian Tatar: Эйәртеш, Eya’rtes’) is a river in Russia, China, and Kazakhstan. It is the chief tributary of the Ob and is also the longest tributary river in the world.
The river's source lies in the Mongolian Altai in Dzungaria (the northern part of Xinjiang, China) close to the border with Mongolia.
The Irtysh's main tributaries include the Tobol, Demyanka and the Ishim. The Ob-Irtysh system forms a major drainage basin in Asia, encompassing most of Western Siberia and the Altai Mountains.
From its origins as the Kara-Irtysh (Vast Irtysh, kara means Vast in Turkic languages but also black. But in the context and geographic terms usually refers vast) in the Mongolian Altay mountains in Xinjiang, China, the Irtysh flows northwest through Lake Zaysan in Kazakhstan, meeting the Ishim and Tobol rivers before merging with the Ob near Khanty-Mansiysk in western Siberia, Russia after .
The name Black Irtysh (Kara-Irtysh in Kazakh, or Cherny Irtysh in Russian) is applied by some authors, especially in Russia and Kazakhstan, to the upper course of the river, from its source entering Lake Zaysan. The term White Irtysh, in opposition to the Black Irtysh, was occasionally used in the past to refer to the Irtysh below lake Zaysan; now this usage is largely obsolete.
The largest tributaries of the Irtysh are, from source to mouth:
Kelan (right)
Burqin (right)
Kalzhyr (right)
Kürshim (right)
Naryn (right)
Bukhtarma (right)
Ulba (right)
Uba (right)
Chagan (left)
Om (right)
Tara (right)
Uy (right)
Osha (left)
Shish (right)
Ishim (left)
Tobol (left)
Noska (left)
Demyanka (right)
Konda (left)
In Kazakhstan and Russia, tankers, passenger and Cargo ships navigate the river during the ice-free season, between April and October. Omsk, home to the headquarters of the state-owned Irtysh River Shipping Company, functions as the largest river port in Western Siberia.
Official source
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