Self-monitoring: Evaluation of the overflow rate from a major combined sewer overflow

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Challenge

Continuous measurement of the volume discharged by a geometrically or hydraulically complex combined sewer overflow

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The 3D EAU solution

Evaluation of the overflow rate, using non contact water level measurement and 3D modelling of the flows
Determination of a site specific
head-discharge relationships considering its geometric and hydraulic properties and for which the uncertainty is quantified
Visualisation of the structure in operation in its hydraulic environment, in order to
understand the flow and determine the most appropriate position for the sensor

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Advantages

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  • Improved understanding of how the CSO works

  • Increasing the reliability of the instrumentation, which requires simplified and safer maintenance (non-contact measurement systems)

  • Cost optimisation of investment and operation (saving: ≈ 4 k€ / year/system)

  • Flexible model for easy evaluation of the effects of geometric optimisations of the CSO on the flow

  • Solutions for complex hydraulic problems

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