Measurement of sewer sediments with acoustic technology

Measurement of sewer sediments with acoustic technology: From laboratory to field experiments

Lepot, M.J. (TU Delft Sanitary Engineering; INSA Lyon)
Pouzol, Tanguy (INSA Lyon)
Aldea Borruel, Xavier (CETaqua)
Suner, David (Aqualogy)
Bertrand-Krajewski, Jean Luc (INSA Lyon)

2016

Monitoring sewer sediments is necessary to better understand sedimentation and erosion processes. Sonar is one of the available techniques to proceed to sewer sediment measurements. Extraction of numerical data, implementation of a new algorithm to identify the water-sediment interface, laboratory and field experiments have been done to evaluate the device, to quantify uncertainties and to test the sonar under various conditions. Results demonstrate that: 1) uncertainties in repeatability are less than 4%, 2) the sonar delivers accurate results under various conditions (small to large sewers and grit chambers), and 3) in situ measurements are affected by uncertainties, mainly due to the fact that the sensor is not in a fixed position but is floating on the free surface in the sewer. This device is useful and accurate for semi-automatic measurement but further research and improvements should be done to better know the position of the device in the section.

deposits
Monitoring
sonar
ultrasonic measurement
uncertainties

http://resolver.tudelft.nl/uuid:7e98f161-5633-4755-99b9-5444d28d162f

https://doi.org/10.1080/1573062X.2016.1148181

1573-062X

Urban Water Journal, 14 (4), 369-377

Institutional Repository

journal article

© 2016 M.J. Lepot, Tanguy Pouzol, Xavier Aldea Borruel, David Suner, Jean Luc Bertrand-Krajewski