Syr Daria

Syr Darya (Kazakh: Сырдария Uzbek: Sirdaryo Tajik: Сирдарё)
Jaxartes, Seyhun
River
Syr Darya at Kyzylorda, Kazakhstan
Name origin: unknown
Countries	Kyrgyzstan, Uzbekistan, Tajikistan, Kazakhstan
Tributaries
- left	Kara
- right	Naryn, Chirciq, Arys, Chu, Sarysu
Cities	Khujand, TJ, Tashkent, UZ, Turkestan, KZ, Kyzylorda, KZ, Baikonur, RU
Source	Confluence of Naryn and Kara Darya
- location	Fergana Valley, Uzbekistan
- elevation	400 m (1,312 ft)
- coordinates	40°54′03″N 71°45′27″E / 40.90083°N 71.75750°E / 40.90083; 71.75750
Mouth	North Aral Sea
- location	Kazaly, Kazakhstan
- elevation	42 m (138 ft)
- coordinates	46°09′15″N 60°52′25″E / 46.15417°N 60.87361°E / 46.15417; 60.87361Coordinates: 46°09′15″N 60°52′25″E / 46.15417°N 60.87361°E / 46.15417; 60.87361
Length	2,212 km (1,374 mi)
Basin	402,760 km2 (155,507 sq mi)
Discharge
- average	1,180 m3/s (41,671 cu ft/s)
- max	3,900 m3/s (137,727 cu ft/s)
- min	170 m3/s (6,003 cu ft/s)
Map of the watershed of Syr Darya. Aral Sea boundaries are c. 1960.

The Syr Darya/ˌsɪərˈdɑːrjə/ (Kazakh: Сырдария, Sırdarïya, سىردارٸيا; Russian: Сырдарья́, tr. Syrdarjja; IPA: [sɨrdɐˈrʲja]; Persian: Sirdarya سيردريا‎‎; Tajik: Сирдарё, Sirdaryo/Sirdarjo ; Turkish: Seyhun, Siri Derya; Arabic: سيحون‎‎: Seyhun; Uzbek: Sirdaryo/Сирдарё; Ancient Greek: Ἰαξάρτης, Jaxartes) is a river in Central Asia.

The Syr Darya originates in the Tian Shan Mountains in Kyrgyzstan and eastern Uzbekistan and flows for 2,212 kilometres (1,374 mi) west and north-west through Uzbekistan and southern Kazakhstan to the northern remnants of the Aral Sea. It is the northern and eastern of the two main rivers in the endorrheic basin of the Aral Sea, the other being the Amu Darya. In the Soviet era, extensive irrigation projects were constructed around both rivers, diverting their water into farmland and causing, during the post-Soviet era, the virtual disappearance of the Aral Sea, once the world's fourth-largest lake.