Imaging and Locating Buried Tunnels Using a High-Resolution S-wave Seismic Survey: Feasibility Field Test From Netherlands
conference paper
The imaging and characterization of very shallow structures like tunnels, cavities, archeological ruins, etc. is important for archeology, police, engineering applications, but also for mitigating hazards. For imaging and characterization, the power of the near-surface geophysical methods can be harnessed using, e.g., ground penetrating radar (Al-Fares et al. 2002), microgravity and multi-channel analysis of surface waves (Debeglia et al. 2006), seismic refraction and/or electric resistivity (Cardarelli et al. 2010) methods. The seismic reflection method with active sources can also be quite useful in many cases. For very shallow targets and soft sand/clay geology, a high-resolution S-wave survey might provide the best images. Due to the shorter wavelength of S-waves compared to P-waves for the same frequency, S-waves provide relatively higher resolution. Another practical reason is, that a line survey with S-wave sources and receivers oriented in the crossline direction, i.e., when performing an SH-wave survey, the SH-waves theoretically decouple from the P/SV-waves and thus the survey data could be processed as “acoustic” data, with the benefit of less complications due to conversions
TNO Identifier
993020
Publisher
EAGE
Source title
Near Surface Geoscience '23
Files
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