Illicit connections are a major reason of the inefficiency of some separate sewers. Despite theirs costs, dye tracing and smoke test methods are common to investigate mis-connections. An infrared camera (FLIR, A35) was used to identify abnormal thermal finger prints (due to lateral connections) along a flume. The illicit connections were simulated by discharging warm or cold water through several types of lateral connections (variation of diameter, intrusion, depth, etc.). Data analysis revealed that the detection of both illicit connections and groundwater infiltration is possible, albeit under certain conditions.
Original languageEnglish
Publication statusPublished - 2016
Event8th International Conference on Sewer Processes and Networks - SS Rotterdam, Rotterdam, Netherlands
Duration: 31 Aug 20162 Sep 2016
Conference number: 8


Conference8th International Conference on Sewer Processes and Networks
Abbreviated titleSPN8
Internet address

    Research areas

  • inspection, IR camera, separate systems, lateral connection, misconnections

ID: 27441970