Şanlıurfa Irrigation Tunnels
Irrigation tunnels, Two parallel tunnels, each 26.4 km long and 7.62 m internal diameter; 328 m3/s design discharge; command area about 476,000 ha in Turkey.
Operational
The record
- Country
- Turkey
- Location
- Bozova to Şanlıurfa and the Harran plain
- Coordinates
- —
- Technology
- Irrigation tunnels
- Capacity
- Two parallel tunnels, each 26.4 km long and 7.62 m internal diameter; 328 m3/s design discharge; command area about 476,000 ha
- Capital cost
- —
- Stage
- Operational
- Owner or client
- General Directorate of State Hydraulic Works (DSI), with the GAP Regional Development Administration
- Contractor
- —
- Operator
- DSI and local irrigation unions (sulama birlikleri)
- Finance
- —
- Award or start year
- 1995
- Commissioned
- 1995-04
Record last checked 2026-09-18.
History
- 1994-11
Ceremony on 9 November marking the connection of the Sanliurfa-Harran plains to Ataturk reservoir water
- 1995-04
Water first flowed through the tunnels on 11 April, opening a first stage of 30,000 ha across 62 villages
- 1995-10
285 million m3 drawn through the tunnels over the first irrigation season
- 2003
Excavation and support system completed
- 2007
Contact grouting still under way
Sources
6 references
Every field in the record above is taken from the references below. A field that none of them confirms prints as a dash.
- GAP Regional Development Administration, Sanliurfa-Harran Ovalari 1. Asama Sulamasina Ait 1995 Yili Uygulamalarinin Degerlendirilmesi, March 1996. gap.gov.tr.
- States that the first agricultural step of GAP was taken when water was released through the Sanliurfa tunnels on 11 April 1995, that a first stage of 30,000 ha across 62 villages was opened to irrigation in the 1995 season, that 285 million m3 was drawn through the tunnels that season at a 69% irrigation efficiency over a 21,603 ha net area, and that the Harran main canal is 118 km long with an 80 m3/s capacity.
- Anadolu Agency, Harran Ovasi GAP ile ihya oldu, 17 July 2019. aa.com.tr.
- Gives two parallel tunnels 26.4 km long and 7.62 m in diameter from the Ataturk reservoir and a 9 November 1994 ceremony.
- International Water Power and Dam Construction, Re-analysis of Sanliurfa (May 2007, bot-walled to curl, returns 403). waterpowermagazine.com.
- MENA Water Review major projects register and PPP pipeline — compiled from procurer publications, development-bank project pages and trade reporting; each record names its source.
Gives 26.4 km and 7.62 m internal diameter per tube, about 9 m excavated diameter, 328 m3/s at about 3.5 m/s, internal water pressure of about 400 kPa, excavation and support completed in 2003 and contact grouting still in progress in 2007.