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Predictive Mapping of Underground Utilities Using Ground Penetrating Radar


Ground penetrating radar (GPR) is a geophysical method that has been developed for shallow subsurface structure investigation. GPR is commonly used to locate and map objects such as pipes, drums, tanks, cables and underground features or utilities. In application of utilities detection, radar data are used to detect the existence of underground utilities which mainly have different conductivity and dielectric properties from its surrounding. This study was carried out in main campus of Universiti Sains Malaysia, Penang. A total of 8 survey lines with 2m line spacing were executed at School of Social Sciences. This study implemented MALA 250MHz shielded antenna to detect and map utilities of the study area. There are anomalies detected at depth < 2.5m at several survey lines that may due to underground pipe, manhole trench, and underground cable that crosses the study area. Orientations of these utilities were successfully detected and well mapped.

Key words

Ground penetrating radar, Shallow subsurface, Utilities, Conductivity, Dielectric

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