Case Study

Hydraulic Event Assessment and Pressure Management in Northern Belgium

Inflowmatix and De Watergroep Case Study


Related Topics

Pressure Transients


De Watergroep is the biggest drinking water and industrial water company in the Flanders, the northern region of Belgium. They were aware of large pressure transients occurring in parts of their distribution network. As such, they were looking for a partner to investigate the issue using advanced monitoring and hydraulic analysis techniques. Depending on the outcomes of these tests, they intended to implement corrective actions at localised event sources to achieve greater consistency in the pressure across the water network.


Based on a collaborative review of the area, Inflowmatix partner SUEZ/CNS, deployed 45 InflowSense™ ‘Edge’ devices. This covered a number of strategic locations typically associated with pressure-transient behaviour.

The high-frequency (128 S/s) event-detection algorithm captured and characterised the magnitude and frequency of potentially damaging pressure-transient behaviour within all the district metered areas. Source localisation was performed to further analyse the cause of these pressure-transient events. Targeted remedial action plans were implemented.


In the municipality of Heuvelland, the InflowSense™ ‘Edge’ devices detected a regularly recurring event: a pressure drop of 20-30 mH2O over short periods of time. This gave rise to severe pressure transients that propagated through the network with a magnitude of up to 130 mH2O.

Our Cumulative Pressure Induced Stress metric and hydraulic ‘event’ analysis delivered insights that uncovered the magnitude, frequency and overall impact of the ‘event’, and accurately located the source. Armed with clear and measured information, De Watergroep was then able to implement a targeted remedial action plan to reduce transient impact and achieve greater consistency in the water network.

Our collaboration with Inflowmatix was very beneficial. Their ‘localisation’ algorithm and Cumulative Induced Pressure Stress metric (CPIS™) delivered excellent insights that would not have been identifiable otherwise.

-Francis Volckaert – Program Manager Asset Information, De Watergroep
Featured SWAN Members: