Leak Localisation

According to the United Nations and World Health Organization, polluted water is currently estimated to affect the health of more than 1.2 billion people, and to contribute to the death of an average 15 million children every year.  The global crisis is getting worse every year.  Based on UN population projections, it is estimated that by 2025 more than 2.8 billion people in 48 countries will face water stress or scarcity conditions.

We all know that clean water is absolutely essential to sustain life.  Yet the rate in which we squander our most precious natural resource is alarming. The World Bank has reported that over 32 billion cubic meters (8.54 trillion gallons) of treated clean water annually is lost from distribution systems due to leakage. In the developing world, the amount of treated water lost can approach 60% of the water entering the distribution system. Any significant reduction in this figure could give millions more people access to clean water.

Cartoon courtesy of the World Bank (Water & Sanitation Sector)

Plugging holes in the water pipes are the easiest way to minimize the huge volumes of clean, treated water lost through leakage. However, finding leaks in underground systems can be a very expensive and time consuming process.  Visual inspection is not possible without digging, and many leaks disperse into the ground before water reaches the surface.  Even when water does become visible above ground, it may be nowhere near the actual leak. If left undetected, leaks can quickly become highly destructive and very costly.

HWM manufactures two solutions to help identify leak areas in the water network.

Leak Noise Logging

Permalog noise loggers are deployed on pipes to listen for the sound of leaks.  Their effectiveness to monitor leakage has been proven in water networks throughout the world

Step Testing

Step testing is a proven method of localising water loss within a zoned distribution system.  It works by measuring the flow of water into a zone as valves are shut of in sequence.