Diyala River

Diyala river
Location
CountryIran, Iraq
Physical characteristics
Source 
  locationNorth of Iraq/Western Iran
Mouth 
  location
Tigris River
Length445 km (277 mi)
Basin size32,600 km2 (12,600 sq mi)
Discharge 
  average164 m3/s (5,800 cu ft/s)
Basin features
Tributaries 
  leftSirwan
  rightTanjero

The Diyala (Arabic: نهر ديالى Nahr Diyālā; Kurdish: Sîrwan; Farsi: دیاله Diyâlah, سيروان Sīrvān) is a river and tributary of the Tigris. It is formed by the confluence of the Sirwan and Tanjaro rivers in Darbandikhan Dam in the Sulaymaniyah Governorate of Northern Iraq. It covers a total distance of 445 km (277 mi).