Challenge
A regional council in New South Wales faced a challenge in managing their extensive network of trunk mains, particularly those located in remote and rural areas.
These critical pipelines, responsible for transporting large volumes of water, had never been inspected for leaks, raising concerns about potential water loss and the risk of unexpected failures. Traditional leak detection methods often involve less effective acoustic solutions or costly inline inspections, making them impractical for remote areas with limited access.
Solution
Aqua Analytics was engaged to conduct a comprehensive leak detection survey on 6.3 kilometres of trunk mains using the TM2 Correlator.
This advanced acoustic technology offered a non-invasive and efficient solution for identifying leaks in challenging environments and where pipe materials are non-metallic or they are of larger diameter (typically >DN400).
The methodology for trunk main leak detection included:
- Inspection Planning: Aqua Analytics developed a detailed inspection plan, taking into account the remote location, terrain challenges, and accessibility of the trunk mains. This involved close collaboration with the asset owner and local property owners to ensure smooth execution of the trunk main inspection.
- TM2 Deployment: The TM2 Correlator was deployed at strategic points along the trunk mains, with inspection lengths ranging from 300 to 900 meters between sensors. This approach allowed for efficient coverage of the pipeline while optimising leak detection accuracy for large diameter assets.
- Acoustic Correlation: The TM2 Correlator utilises advanced acoustic correlation technology to pinpoint leak locations by analysing the sound waves generated by leaks. This non-invasive method eliminates the need for disruptive excavations or service interruptions.
- Data Analysis and Reporting: The collected data was analysed to identify and locate leaks with precision. A comprehensive report was provided to the council, detailing the findings and recommendations for repair or further investigation.
Results and Findings
- Two Leaks Identified: The TM2 Correlator successfully identified two leaks within the 6.3 kilometers of surveyed trunk mains.
- Long-Range Detection: One of the leaks was located with a remarkable 725-meter spacing between sensors, demonstrating the TM2's capability to detect leaks over long distances on trunk mains. (See image below)
- Proactive Maintenance: The early detection of these leaks enabled the council to take proactive measures for repair or replacement, preventing potential water loss, service disruptions, and costly emergency repairs.
Conclusion
Aqua Analytics’ utilisation of the TM2 Correlator provided a cost-effective and efficient solution for inspecting the council’s remote trunk mains.
The non-invasive technology allowed for accurate leak detection without disrupting service or requiring more expensive internal leak detection tools such as AquaSnake or AquaSphere.
This project highlights the value of proactive leak detection in managing critical water infrastructure, ensuring efficient water delivery and minimising potential risks.
Aqua Analytics has a range of trunk main leak detection tools to help water utilities and asset owners manage their large diameter pipeline inventory.
