Leakage Detection refers to the identification of unintended fluid or gas escape from buried pipelines, utility conduits, or subsurface infrastructure using sensor-based monitoring systems. In distributed fiber-optic sensing research, leakage events are detected by measuring localized temperature or strain anomalies along cable routes caused by escaping water, gas, or other substances. Applications include water distribution network monitoring, gas pipeline integrity assessment, and urban infrastructure surveillance for early detection of underground leaks before surface damage occurs.
We present field trial on urban monitoring over telecom networks using Rayleigh-based distributed temperature/ strain sensor (DTSS), showing the capability of detecting subtle infrastructure signatures including manhole locations, road traffic, sprinklers and underground leakage events.