Irtysh

The Irtysh (Old Turkic: 𐰼𐱅𐰾:𐰇𐰏𐰕𐰏, romanized: Ertis ügüzüg,[1] Mongolian: Эрчис мөрөн, Erchis mörön,[2] "erchleh", "twirl"; Russian: Иртыш; Kazakh: Ертіс, Ertis, ه‌رتىس; Chinese: 额尔齐斯河, pinyin: É'ěrqísī hé, Xiao'erjing: عَعَرٿِسِ حْ; Uighur: إيرتيش, Әртиш, Ertish; Tatar: Cyrillic Иртеш, Latin İrteş, Arabic 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.

Irtysh
Irtysh watershed
Location
CountryMongolia, China, Kazakhstan, Russia
Physical characteristics
Source 
  locationnear Mang-tai-ch’ia-ta-fan pass, Altai Mountains, Xinjiang, China
  coordinates47°52′39″N 89°58′12″E
  elevation2,960 m (9,710 ft)
MouthOb
  coordinates
61°05′24″N 68°49′15.60″E
Length4,248 km (2,640 mi)
Basin size1,643,000 km2 (634,000 sq mi)
Discharge 
  average2,150 m3/s (76,000 cu ft/s) (near Tobolsk)
Basin features
ProgressionObKara Sea

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.


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