Correction of GPR wave velocity with distorted hyperbolic reflection in underground utility's GPR survey

Wai Lok Lai, J. F.C. Sham, F. Xie

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

2 Citations (Scopus)


A validation study was conducted over a fixed alignment of underground utilities to study the effects of GPR traverse directions on GPR wave velocity estimation of utilities. The experiment was carried out on a 0.98 m deep underground drainage pipe in the campus of Hong Kong PolyU. During the changes of GPR traverse directions relative to the fixed and known utility alignments at an angle 90°, 75°, 60°, and 45°, we studied the variation of GPR wave velocities estimated through the hyperbolic fitting process of the pipe's reflection, and correct it with a simple algorithm. Errors of velocity estimation would result in errors of depth estimation of buried utilities and variation of material properties.
Original languageEnglish
Title of host publicationProceedings of 2016 16th International Conference of Ground Penetrating Radar, GPR 2016
ISBN (Electronic)9781509051816
Publication statusPublished - 20 Sep 2016
Event16th International Conference of Ground Penetrating Radar, GPR 2016 - Hong Kong Polytechnic University, Hong Kong, Hong Kong
Duration: 13 Jun 201616 Jun 2016


Conference16th International Conference of Ground Penetrating Radar, GPR 2016
Country/TerritoryHong Kong
CityHong Kong


  • Ground penetrating radar
  • Pattern matching
  • Validation

ASJC Scopus subject areas

  • Signal Processing
  • Instrumentation

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