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The behaviour of near‐surface soils through ultrasonic near‐surface inundation testing
Author(s) -
Taylor OliverDenzil S.,
Cunningham Amy L.,
Walker Robert E.,
McKenna Mihan H.,
Martin Kathryn E.,
Kinnebrew Pamela G.
Publication year - 2019
Publication title -
near surface geophysics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.639
H-Index - 39
eISSN - 1873-0604
pISSN - 1569-4445
DOI - 10.1002/nsg.12045
Subject(s) - seismometer , geology , attenuation , saturation (graph theory) , surface wave , ultrasonic sensor , seismology , degree of saturation , waveform , geotechnical engineering , igneous petrology , hydrogeology , regional geology , gemology , soil water , engineering geology , soil science , acoustics , telmatology , volcanism , engineering , mathematics , voltage , optics , tectonics , telecommunications , physics , combinatorics , electrical engineering
Seismometers installed within the upper metre of the subsurface can experience significant variability in signal propagation and attenuation properties of observed arrivals due to meteorological events. For example, during rain events, both the time and frequency representations of observed seismic waveforms can be significantly altered, complicating potential automatic signal processing efforts. Historically, a lack of laboratory equipment to explicitly investigate the effects of active inundation on seismic wave properties in the near surface prevented recreation of the observed phenomena in a controlled environment. Presented herein is a new flow chamber designed specifically for near‐surface seismic wave/fluid flow interaction phenomenology research, the ultrasonic near‐surface inundation testing device and new v p ‐saturation and v s ‐saturation relationships due to the effects of matric suction on the soil fabric.