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Searching For Leaks And Defects

Searching For Leaks And Defects

Purpose of analysis

Identifying anomalies in a water supply system by using a hydraulic model and real-time instrument readings simultaneously.

Detecting and visualizing divergencies between a hydraulic simulation model and instrument readings

If the hydraulic model of the water supply system has been calibrated, the hydraulic analysis performed for current consumer demands should result in pressure values at nodes matching the readings of pressure meters.

It is possible to take meter readings and perform the corresponding hydraulic analysis at set intervals.

If during the measurement period there have been changes in the actual system that are not described in the hydraulic model (leakage, unauthorized withdrawal from the network, change in pipe friction caused by a malfunctioning valve, and so on), the hydraulic analysis will detect the discrepancy between the design pressures and the pressure gauge readings as well as the difference between the total flow rate at the reservoirs in the model and the flowmeter readings.

 

Locating a leak

If the flow rate at the reservoir according to the flowmeter corresponds to the flow rate in the hydraulic model but there are noticeable differences in pressure at the system nodes, it can be assumed that a change in frictional loss occurs in the system pipe.

It is possible to locate the defect that occurred in the system pipe and was caused by the change in friction right down to the pipe.

 

Locating a pipe narrowing

If the flow rate at the reservoir according to the flowmeter corresponds to the flow rate in the hydraulic model but there are noticeable differences in pressure at the system nodes, it can be assumed that a change in frictional loss occurs in the system pipe.

It is possible to locate the defect that occurred in the system pipe and was caused by the change in friction right down to the pipe.

These calculations require a license for simulation modeling!

See also: Calibrating a water supply system