Diyala River

The river Diyala (blue)

Template: Infobox River / BILD_fehlt

Template: Infobox River / Obsolete

The Diyala (Arabic نهر ديالى, DMG Nahr Diyala; Kurdish: Sirwan, Persian سيروان, Shirvan DMG ) is a tributary of the Tigris. It originates in Iran and flows through Iran and Iraq. Its total length is 443 km. The etymology of the name is unknown. In ancient times the river as Σίλλα or Δέλαζ ( Dialas ) was known. The Iraqi Diyala province is named after this river.

The source is located near the city of Hamadan in the Zagros Mountains. The Diyala is 32 km of the Iran-Iraq border. South of Baghdad, Diyala meets on the Tigris. Only the lower part of the river is navigable, and forms an important route for trade between Iran and Iraq. The lower reaches of Diyala, there is a dam.

The started in the 3rd century Nahrawan channel and Diyala have partially exchanged their runs during the Middle Ages. Thus, the lower reaches of the Nahrawan is probably the former lower reaches of Diyala, whereas the modern lower reaches of Diyala probably follows a former side channel of the Nahrawan.