Dŵr Cymru Welsh Water

Welsh Water are responsible for providing over 1.4 million homes, 3 million people with a 828 million liters (218 million gallons) of high quality water every day and for taking away, treating and properly disposing of the wastewater. Dŵr Cymru Welsh Water has over 26,500km (16,466 miles) of water mains and committed to the highest levels of service and quality.



The Future of Leak Detection


Working with Aqualogic (WC) Ltd., a Trimble Water Authorized Business Partner, Dŵr Cymru Welsh Water’s iLAB division trialled a new way of detecting leaks on networks using Trimble Water Leak Detection solutions (powered by Aquarius Spectrum). These solutions come in two parts; Trimble Wireless Leak Monitoring and Detection is a Smart 365 Leak Correlation system that can monitor an entire water distribution network and provide complete online leak noise data showing GPS leak location, intensity, history, ongoing statistics at every point of interest (POI). Trimble Mobile Leak Detection utilizes smartphones and turns them into leak noise correlators which allow engineers in the field to accurately pinpoint the precise location of a leak with GPS location and leak noise recording, storing data (noise and location) using cloud technologies.

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Aqualogic installed 20* Trimble Telog LDR-32 wireless leak detection sensors within a district metered zone (DMZ) in South Wales forming a fixed monitoring network covering 5km (3.1miles) of water mains.

How it works; Once deployed on the network each sensor ‘couples’ with another sensor when leak noise is detected, then performs a ‘correlation’. Once confidence in the leak has been established, following a sequence of correlations, a GPS location is generated. The results are presented via the cloud to a job system immediately viewable on a web-browser before being allocated to a leak detection crew.

The leak can be pinpointed using the Trimble Mobile Leak Detection kti, utilizing a pair of acoustic sensors and a Smartphone App. This data is logged and stored within the job system.

The cloud software can further be used to simply sweep areas allowing for all activity and POI’s to be logged and cloud stored. Leak noises can be reviewed by management or more skilled personnel, allowing for less skilled surveyors when rapid resourcing is required.

*The DMZ now has 10 sensors following optimisation, equivalent of 1 per 500m (0.31 miles).



21st Century Technology
Leak Detection suffers from traditional attitudes, the Trimble system is a game changing innovation bringing smart network monitoring and pinpointing leaks into the 21st century.

GIS Maps
Online geographical visualisation of a complete system with leak alerts; integration with pipe mapping overalls; pipe condition trending by leak statistics; and live resource performance analysis.

Maximizing Workforce
Trimble Mobile Leak Detection uses a smartphone and is an easy to use system requiring minimal training. It monitors and maps field based activity while freeing up ‘experts’ by enabling novices.

Continuous pipe monitoring using acoustic sensors with high pinpoint accuracy.



During the trial 7 Points of Interest (POI) were identified by the Trimble Wireless Leak Detection and Monitoring fixed system. Using acoustic profiling the system ranked the highest priority leaks to repair comparing displaying confidence and intensity.

The top ranked POI was then pinpointed using the Trimble Mobile Leak Detection system, and leak excavated and repaired resulting in a 95% reduction in NRW. Welsh Water could then decide to repair or monitor the other leaks, offering additional substantial cost benefits.

Within 3 days the Trimble Wireless Leak Detection and Monitoring system had undertaken multiple night time correlations and created multiple POIs. The system continues to monitor this area looking for leak intensity changes 365 days per year. This zone had been problematic with NRW not resolved following many years of tradition resource led intervention.

95% Reduction in NRW
5 POI's Identified
7 Leaks Pinpointed by Trimble