Increasing efficiency with permanent leakage monitoring - Case Study

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Abstract

In this paper information from Water Authorities in the USA, Europe, Middle East and Australia that have purchased permanent monitoring leak detection equipment is reviewed and the findings are presented in a structured format that covers the following:

  • Justification for permanent monitoring
  • Evaluating the different product offerings
  • Selecting the deployment zone
  • Installation challenges
  • Collection and validation of the data
  • Handling false Alarms
  • Managing the change in operational procedures
  • Calculating the payback period
  • Viability to expand the program
  • The operational benefits to permanent leakage monitoring

The objective is to share knowledge, experiences, operational benefits, economic benefits and water loss results.

Introduction to permanent monitoring

Permanent leakage monitoring is a concept that has been practiced by a number of water authorities over the last five years. Acoustic loggers are deployed with a magnetic connection on valves and hydrants. They are programmed to log noise levels in the early hours of the morning when pressure is highest and background noise is lowest.  With careful analysis of the data the probability of leakage can be calculated based on the level and consistency of the noise.  This data is sent daily to a host pc or webserver by SMS or GPRS (depending on the system).  Some systems have a modem in every logger and others use repeaters and data collection units to minimise the cost of data transmission. Most systems display the data on a map, colour code the loggers and keep the results in a table.  Some systems provide a correlation showing the exact leak position.

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