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Diyala (Sirwan)
Origin Western Iran
Mouth Tigris River
Basin countries Iran/Iraq
Length 445 km (277 mi)
Basin area 32,600 km2 (12,600 sq mi)[1]

The Diyala River (Kurdish: Sirwan, سيروان, Arabic: نهر ديالى‎, Persian: سیروان دیاله), is a river and tributary of the Tigris that originates in Iran as the Sirwan (or Sirvan) River then runs mainly through Eastern Iraq. It covers a total distance of 445 km (277 mi).

Course[edit]

It rises near Sanandaj, in the Zagros Mountains of Iran. It then descends through the mountains, where for some 32 km it forms the border between the two countries. It finally feeds into the Tigris below Baghdad. Navigation of the upper reaches of the Diyala is not possible because of its narrow defiles, but the river's valley provides an important trade route between Iran and Iraq.

History[edit]

The river is mentioned in Herodotus' Histories under the name Gyndes, where it is stated that the king Cyrus the Great dispersed it by digging 360 channels as punishment after a sacred white horse perished there. The river returned to its former proportions after the channels disappeared under the sand. The Battle of Diyala River took place in 693 BC between the forces of the Assyrian empire and the Elamites of southern Iran.

Name[edit]

Its origin in Kurdish and Persian is called "Sirwan", meaning 'roaring sea' or 'shouting river', as well as being the name of an ancient city near Ilam city in Iran. In the Sassanid and early Islamic periods, the lower course of the river formed part of the Nahrawan Canal. The Diyala Governorate in Iraq is named after the river.

Dams[edit]

In Iran the Daryan Dam is currently under construction near Daryan in Kermanshah Province. The purpose of the dam is to divert a significant portion of the river to Southwestern Iran for irrigation through the 48 km (30 mi) long Nosoud Water Conveyance Tunnel and to produce hydroelectric power.[2][3] In Iraq, the river first reaches the Darbandikhan Dam which generates hydroelectric power and stores water for irrigation. It then flows down to the Hemrin Dam for similar purposes. In the lower Diyala Valley near Baghdad the river is controlled by the Diyala Weir which controls floods and irrigates the area northeast of Baghdad.

See also[edit]

References[edit]

  1. ^ Hussein, Haitham A. (June 2010). "Dependable Discharges of The Upper and Middle Diyala Basins". Journal of Engineering 16 (2): 4960–4969. Retrieved 20 May 2013. 
  2. ^ "Darian Dam" (in Farsi). Iran Water Resources Management. Retrieved 17 May 2013. 
  3. ^ "Water Tunnel Nosoud" (in Persian). JTMA. Retrieved 17 May 2013. 

Coordinates: 33°13′15″N 44°30′23″E / 33.2208°N 44.5064°E / 33.2208; 44.5064


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Diyala_River — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
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