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AuthorGritto, Roland
AuthorElnaiem, Ali Elobaid
AuthorMohamed, Fateh Alrahman
AuthorSadooni, Fadhil
Available date2023-09-10T07:16:24Z
Publication Date2021-03-19
Publication NameGeophysics
Identifierhttp://dx.doi.org/10.1190/geo2020-0377.1
CitationGritto, R., Elnaiem, A. E., Mohamed, F. A., & Sadooni, F. (2021). Seismic detection and characterization of a man-made karst analog—A feasibility study. Geophysics, 86(3), WA35-WA48.‏
ISSN00168033
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85119457631&origin=inward
URIhttp://hdl.handle.net/10576/47338
AbstractAt the site of a water drainage shaft on the campus of Qatar University that serves as a man-made karst analog, two seismic imaging techniques were adapted to use resonant scattered waves recorded during active-source seismic surveys and during passive ambient-noise surveys. Data acquisition included two seismic transmission surveys that encompassed the shaft and a passive ambient-noise survey that extended across the top of the shaft. Seismic imaging of band-pass-filtered resonance waves correctly estimated the location and dimension of the shaft. Furthermore, the method detected the presence and the location of a horizontal drainage pipe and gravel bed connecting neighboring water shafts. Ambient-noise data were analyzed by computing amplitude values of the seismic records in spectral passbands. The results indicated an amplification of seismic amplitudes above the shaft for low-frequency passbands and a sharp decrease in amplitude values for high-frequency passbands. The high- and low-amplitude values displayed as a function of the receiver position allowed for accurate detection and location of the shaft in space. Ground truthing of the imaging results confirmed the accuracy of the seismic techniques, whereas numerical modeling supported the interpretation of the ambient-noise data. The techniques used do not require knowledge of the seismic velocities in the subsurface, but they depend on a priori information about the approximate location of the target.
SponsorThe authors would like to thank the associate editor, two anonymous reviewers, and the editor-in-chief for the constructive comments and suggestions that improved the content of the manuscript. We would also like to thank D. Dreger and A. Nayak for fruitful discussions during the preparation of the manuscript. We are indebted to V. Korneev, who contributed to the project but passed away before its conclusion. This work was supported by grant no. NPRP 04-137-04-25 from the Qatar National Research Fund, a member of Qatar Foundation.
Languageen
PublisherSociety of Exploration Geophysicists
Subjectscattering
spectral analysis
TitleSeismic detection and characterization of a man-made karst analog - A feasibility study
TypeArticle
Issue Number3
Volume Number86
dc.accessType Abstract Only


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