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Underground network listening for leaks beneath your feet in Perth, Autralia

  • Underground network listening for leaks beneath your feet in Perth, Autralia
    Terra15 Chief Executive Nader Issa and Water Corporation General Manager Assets Planning and Delivery Evan Hambleton viewing part of the CBD leak detection network
  • 30km network of fibre-optic cable used to listen for water leaks
  • WA-developed solution detects hidden leaks before they become more significant bursts
  • Part of $184.7 million investment in Perth metro water network to improve resilience and save water

About the entity

Water Corporation
We are the principal supplier of water, wastewater and drainage services in Western Australia to hundreds of thousands of homes, businesses and farms, as well as providing bulk water to farms for irrigation.

Hidden technology beneath your feet is listening for water leaks in the Perth CBD, in a new, Australia-first project by Water Corporation.

The cutting-edge distributed acoustic sensing technology by Perth-based Terra15 Technologies turns existing fibre-optic cable in the city into a giant acoustic leak detection network to detect water leaks before a pipe bursts.

Laser light is pulsed through a thin strand of fibre-optic cable, no thicker than a human hair, which detects any minute interruptions in the signal due to vibration or sound.

Programmed to listen for the distinctive sound of a leak in nearby water mains, the technology enables Water Corporation to fix the pipe long before it bursts, saving valuable water, money and more significant disruption.

The equipment is so sensitive it can detect regional earthquakes, as well as the background noise of footsteps, traffic and construction work. It can also detect tampering or theft on a pipeline.

Water Corporation General Manager Assets Planning and Delivery Evan Hambleton says the technology will help improve the reliability of the CBD water supply and reduce reactive repair work, costing $12.5 million within the metro area in the last financial year (FY22-23) alone.

“While we are progressively upgrading the Perth CBD water network, some leakage is unavoidable with sections of our old cast iron pipes dating back more than 100 years.

“This clever technology, which uses spare capacity in existing telecommunications fibre-optic cable, causes the fibre to behave like thousands of vibration sensors, or acoustic loggers, spread out over many tens of kilometres.

“Sensitive enough to detect a tiny leak quickly and track it over time, it will enable us to fix the pipe long before any water would be visible at the surface, preventing a much more damaging and disruptive burst.

“Water Corporation has a proven track record of innovation in the Australian water industry and this technology will help improve the resilience of the Perth CBD supply and save taxpayer money.”

The project is on top of Water Corporation’s planned $184.7 million investment (FY23-24) in the metro water network and supply projects, including its current $10 million project to replace ageing water mains around the Kaarta Gar-up (Mount Eliza) reservoir in Kings Park under its Pipes for Perth program.

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