Detection and quantification of lateral, illicit connections and infiltration in sewers with Infra-Red camera: Conclusions after a wide experimental plan

WATER RESEARCH

卷:122

Article

Lepot, Mathieu¹  Makris, Konstantinos F.¹  Clemens, Francois H. L. R.^1,2 

[1] Delft Univ Technol, Fac Civil Engn & Geosci, Water Management Dept, Stevinweg 1 Bldg 23, NL-2628 CN Delft, Netherlands

[2] Deltares, POB 177, NL-2600 MH Delft, Netherlands

关键词: Connection;    Separate sewer;    Identification;    Quantification;    Thermography;   

DOI  :  10.1016/j.watres.2017.06.030

来源: Elsevier

【 摘 要 】

Separate sewer systems are sensitive to illegal or mis-connections. Several techniques (including the Distributed Temperature Sensor) are now available to identify and locate those connections. Based on thermal fingerprints, DTS allows the localization of each lateral connection along a reach. The use of Infra-Red camera has been investigated with 748 laboratory experiments (artificial connections along a flume). The tested connections vary in diameters (from 75 to 200 mm), lengths of intrusion (from 0 to 200 m), shapes (circular or linear i.e. cracks), depths, discharge rates between the lateral connection and the main flume, and temperatures. IR frame analysis (for detection) and 2D temperature mapping (at the free water surface, for quantification) demonstrate that: i) the detection limit is very low (ratio between lateral and main discharges: 0.025) and ii) the quantification of the lateral discharge is impossible. Application of an IR camera seems to be a promising technique to detect lateral connections. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

Free