Reduction of technical losses of the water distribution system

Network zoning – 35 sectors:

• Investigation (7,000 controlled valves, 800 hours of georadar, drawings verification CAD/SIG etc.), zero pressure test (ZPT), hydraulic measures (3,000 days), modelling and calibration of the model (1,500 Km), analysis of the alternative sectors,
• Construction of 30 pressure regulation plant with macro meters, active pressure monitoring and SCADA connection,
• Installation of 2,000 m of pipes mainly with trenchless methods (pipe bursting and horizontal drilling),
• Replacement of 1,000 valves (ND80 to ND250) on all the network.

Leak detection, reduction and repairs:

• Non visible leak detection with acoustic methods (4,000 km) and reparation of 5,000 leaks planned in the contract,
• Installation of pressure reduction equipment on the network,
• Rehabilitation of obsolete pipelines,
• Reinforcement of the interconnections to improve the network zoning.
• Emergency repairs on the large diameter pipes and special work (DN300 – DN 1500).

Services:

• Analysis as the per the IWA protocol – base line and water gain of the studied sector,
• Installation of telemetry and of an automate (SCADA) to collect the data in real time of more than 300 strategic points of the network. (9,000 data /month),
• Training of sectors and network operation and maintenance teams,
• Operational support for the startup of the created hydraulic sectors,
• Preventive and corrective maintenance of the pressure regulation plants.