The design-build project followed by operational technical assistance and evaluation of the results of hydraulic sectorization and reduction of water losses in the city of Cali in Colombia (2.5 million inhabitants) has reached 75% of progress.
54 hydraulic sectors have been optimized or created, corresponding to a network length of 1 800 kilometers. At the same time, active leak detection over 2 400 kilometers of distribution network has identified 3 600 non-visible leaks, of which 2 600 have been repaired at this stage. In addition, 600 defective valves were identified and replaced, and 700 meters of linear reinforcement and network interconnection, mainly HDPE by the trenchless method, were installed.
The project will soon enter the start-up phase of the new SCADA control system for sectorization and active pressure management, and operational support for the EMCALI (the operator).
At this stage, the water savings generated by the project are estimated at 30,000 m3/day, with an objective of 60,000 m3/day when the SCADA system is in place and the preventive maintenance of leaks, by analysis of minimum nightly flows, fully operational.