Soil electromagnetic mapping for enhanced GPR utility location

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Colleges, School and Institutes

Abstract

The geographical mapping of soil electromagnetic properties provides many advantages to utility location, including highlighting areas where soil properties cause significant signal loss, providing signal velocity predictions and estimating the smallest detectable feature in a survey. All of these factors can significantly improve the usefulness of utility location survey data. However, the mapping of soil electromagnetic properties is complex, and relies on many geotechnical and environmental variables. Also, higher frequency ground penetrating radar (GPR) equipment is required if the detection of small utilities is to be achieved, but this greatly limits the depth of signal penetration. Therefore, the wide signal bandwidth required to balance resolution and penetration results in a need to relate mapping parameters to complex frequency-dependent variations, water contents and temperatures. Mapping these properties over large geographical areas is fraught with difficulties, including the vast number of measurements required to achieve even the most basic geospatial resolution. However, geotechnical testing is widespread and can provide data for the prediction of soil electromagnetic properties. Therefore, Mapping the Underworld (MTU), a major UK research project attempting to significantly improve geophysical utility location, is exploring the possibility of using such data for selected urban mapping of GPR relevant soil properties.

Details

Original languageEnglish
Title of host publicationInternational Society for Trenchless Technology - 25th No-Dig International Conference and Exhibition, Roma 07: Mediterranean No-Dig 2007
Publication statusPublished - 2007
Event25th No-Dig International Conference and Exhibition, Roma 07: Mediterranean No-Dig 2007 - Rome, Italy
Duration: 10 Sep 200712 Sep 2007

Conference

Conference25th No-Dig International Conference and Exhibition, Roma 07: Mediterranean No-Dig 2007
CountryItaly
CityRome
Period10/09/0712/09/07

Keywords

  • Geophysical utility location, Ground penetrating radar, Soil electromagnetic properties