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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

Fibre-optic distributed temperature sensing in combined sewer systems.

R P S Schilperoort¹, F H L R Clemens

¹Department of Watermanagement, Faculty of Civil Engineering, Delft University of Technology, P.O. Box 5048, 2600, GA, Delft, The Netherlands. r.p.s.schilperoort@tudelft.nl

Water Science and Technology : a Journal of the International Association on Water Pollution Research

|September 1, 2009

Summary

Fibre-optic distributed temperature sensing (DTS) effectively monitors combined sewer systems. This technology precisely tracks wastewater temperature, enabling detailed analysis of in-sewer processes and flow contributions.

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Area of Science:

Environmental Engineering
Sensing Technologies
Wastewater Management

Background:

Combined sewer systems present challenges in monitoring internal processes.
Accurate temperature data is crucial for understanding wastewater dynamics.

Purpose of the Study:

To introduce and evaluate fibre-optic distributed temperature sensing (DTS) for combined sewer systems.
To demonstrate the feasibility and benefits of DTS for in-sewer monitoring.

Main Methods:

Insertion of a fibre-optic cable into an 1,850 m combined sewer system.
Utilizing a laser instrument for precise temperature measurements and data logging.
Conducting a one-week monitoring campaign to collect high-resolution temperature data.

Main Results:

Demonstrated the feasibility of installing fibre-optic cables in combined sewers.
Achieved dense spatial and temporal resolution for in-sewer temperature monitoring.
Successfully tracked individual house discharges and stormwater propagation.
Observed wastewater flow confluences, enabling potential derivation of flow contributions.

Conclusions:

Fibre-optic DTS is a feasible, low-maintenance solution for combined sewer monitoring.
The technique provides unprecedented detail on in-sewer processes affecting temperature.
DTS offers valuable insights into flow dynamics, stormwater impact, and discharge events.