Algeria, Derivation plants and Transfers El Harrach to Douéra

The system is the core of the project to develop the irrigation perimeters for the central Mitidja plain covering 17,180 ha and includes recovering of water from Oued Harrach and filling up the Douéra dam. 

Other positive impacts resulting from the project are valorization of the water resources by infiltrating Mitidja’s ground water, possibility of transfer for West Alger’s water supply and job creation.

ClientOffice National de l‘Irrigation et Drainage, Algeria
LocationMitidja plain, Algeria
Services Period2006 - 2011
Project Cost60 million EUR
Technical Data
  • Diversion threshold of 75 m long effective ridge
  • Diversion threshold of 75 m long effective ridge
1065 l/s
  • Double intake
2 x 50 m
  • Grit chamber including 2 tanks
L= 390 m, W=22.5 m
  • Equalizing reservoir linked to the end plant    
V=2,500 m³
  • Pipeline   
L=24.5 km (12 km gravity, 12.5 km pump back), DN 2000
  • Pumping stations     
Q=8 m³/s, H=87 m, DR1, Q=1.9 m³/s, H=29 m
  • Equalizing reservoir
V=750 m³
  • Revision of the conceptual design
  • Modification of the study
  • Technical Assistance for the start-up operations of the sites
  • Site supervision and project follow-up
  • Checking and approval of the company’s final design (civil engineering and equipment)
  • Assistance in testing and tentative acceptance procedures
  • Preparation of the operation manual and of the research study
  • Establishing the concessionary file


November 19th, 2018

New waste project in Tunisia

On 1st September 2018, GKW Consult has been contracted to prepare a study that aims to determine…

October 8th, 2018

Dr. Christoph Theune invited as speaker in FIDIC Latin America Contract User’s Conference, Panama City, 2-4 October 2018

The second FIDIC Latin America Contract Users' conference took place from 2-4 October 2018 in…

March 5th, 2018

Lahmeyer and GKW Consult at VDI Recruiting Day 2018

On Thursday, 1 March 2018, Lahmeyer International and GKW Consult presented themselves at the VDI…