title: Assessment of detection limits of fiber-optic distributed temperature sensing for detection of illicit connections.
abstract: Distributed temperature sensing (DTS) with fiber-optic cables is a powerful tool to detect illicit connections in storm sewer systems. High-frequency temperature measurements along the in-sewer cable create a detailed representation of temperature anomalies due to illicit discharges. The detection limits of the monitoring equipment itself are well-known, but there is little information available on detection limits for the discovery of illicit connections, as in mixing of sewers, and attenuation also plays an important role. This paper describes the results of full-scale experiments aiming to quantify the detection limits for illicit connections under various sewer conditions. Based on the results, a new monitoring set-up for (partially) filled sewer conduits has been proposed.
authors.affiliation: Royal HaskoningDHV, Barbarossastraat 35, P.O. Box 151, 6500, AD, Nijmegen, The Netherlands.
authors.forename: Jaap
authors.initials: J
authors.lastname: Nienhuis
authors.forename: Cornelis
authors.initials: C
authors.lastname: de Haan
authors.forename: Jeroen
authors.initials: J
authors.lastname: Langeveld
authors.forename: Martijn
authors.initials: M
authors.lastname: Klootwijk
authors.forename: François
authors.initials: F
authors.lastname: Clemens
mesh_terms: D055100:Optical Fibers; D012498:Sanitary Engineering / Q000295:instrumentation* / Q000379:methods / Q000592:standards; D013696:Temperature