Al Ain – big reductions equal big savings

In the city of Al Ain in the Emirate of Abu Dhabi, United Arab Emirates, NIRAS has been consultant on a project where NRW-levels have been reduced from as high as 45 percent down to 10 percent within one year. This corresponds to annual savings of US$ 4 million. These hands-on results were reached by implementation of state-of-the-art technologies which include real-time hydraulic modelling and online performance monitoring. More details on page 14.

Copenhagen – sustainable water results despite older pipes

In Denmark, located in Northern Europe, NRW-levels ranges from 5 to 10 percent. NIRAS is in-house consultant for a substantial range number of Danish water utilities and ensures an ongoing focus on improvements and optimization. In Copenhagen, the capital of Denmark, a low NRW-level of 5 percent has been achieved. This result is especially a remarkable because 76 percent of the water pipes are from before 1945, 10 percent are older than 100 years and 86 percent of the pipes are cast iron pipes.

The low NRW-level is solid proof that with the right approach it is possible to achieve and maintain remarkable results even in cities with a large amount of very old pipes. Danish water utilities have had a strong focus on preserving water and creating and maintaining sustainable water supplies of high quality since the 1970’s.

This has been achieved through optimizing the networks, reducing leakage and improving water quality through a combination of strategic rehabilitation, preventive maintenance and leakage control.