ADVANCED LEAK DETECTION TECHNOLOGIES FOR PUBLIC WATER NETWORKS

Abstract

Water leakage in public water distribution networks presents a major challenge for municipalities and utilities, leading to resource depletion and financial inefficiency. This short paper explores the application of advanced technologies – Hydrogen Tracer Gas, Acoustic Leak Detection and Satellite Leak Detection – to improve early detection and elimination of leaks. The tracer gas method, using the Hydrolux HL7000, is a non-invasive, highly sensitive and environmentally safe method, but requires careful handling of the gas and can be affected by soil conditions and pipe depth. Acoustic leak detection, demonstrated by the LeakPen device, is based on the capture and analysis of sound waves generated by pressurized water escaping through holes in the pipe. This method offers portability and accuracy, but can be influenced by pipe material and background noise. Satellite leak detection, using spectral analysis and microwave reflectometry (as used by Utilis), allows for large-scale, remote leak detection by identifying surface anomalies such as unusual vegetation growth or increased soil moisture. This approach offers broad coverage and integrates with Geographic Information System (GIS) data for precise location, although it faces challenges such as resolution limitations, weather dependency, and high initial costs. The paper highlights that while each technology has distinct advantages and limitations, their combined application can significantly improve leak detection and water conservation efforts. Integrating these innovative methods with existing infrastructure and data analytics can provide a more efficient and proactive approach to water network management. Future advances in sensor technology, artificial intelligence, and automation are expected to further refine these methods, contributing to the sustainable management of water resources and reducing operational costs for utility companies around the world.