Perturbation mapping of water leak in buried water pipes via laboratory validation experiments with high-frequency ground penetrating radar (GPR) |
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| Affiliation: | 1. LUNAM Université, IFSTTAR, F-44340 Bouguenais, France;2. CEREMA, DTO/DLRCA, ERA17, Angers, France;1. Department of Physics, Nanjing Agricultural University, Nanjing 210095, PR China;2. School of Computer Science and Technology, Xidian University, Xi’an 710071, PR China;1. BAM-Federal Institute for Material Research and Testing, Division 8.2, Berlin, Germany;2. Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hong Kong;3. Faculty V, Technical University of Berlin, Germany;1. Department of Land Surveying and Geo-Informatics, Hong Kong Polytechnic University, Hung Hom, Hong Kong;2. Federal Institute for Materials Research and Testing (BAM), Department 8, Unter den Eichen 87, Berlin 14197, Germany |
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| Abstract: | This paper studies the perturbation patterns of GPR images as a tool for water leakage detection in buried water pipes with laboratory experiments. Different perturbations patterns on GPR signals due to a water leak of metallic and PVC pipes buried in a sand box, were mapped and studied with controlled water injection and leak volume, as well as a fixed leak position in the pipes. These perturbation patterns of signal strength include the tale-tell signs of a central leak point and propagation of the radial wetting front vortex centered around the leak point at different injection times. These patterns, compared to the no-leak dry condition, were interpreted with the conventional principles of dielectric contrast and reflection coefficients, and the associated reflection and absorption mechanisms. It is believed that this set of data will serve as an image matching fingerprint to identify and map water leaks in the field. |
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| Keywords: | Water leak Ground penetrating radar Water perturbation patterns |
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