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Combined Surface-Wave and Resistivity Imaging for Shallow Subsurface Characterization

Tufekci, Sinan
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1250891786

Abstract Details

2009, Master of Science (MS), Ohio University, Geological Sciences (Arts and Sciences).
A method for combining resistivity and surface-wave tomography data has been developed to enhance the near-surface anomalies imaged by both techniques. Efficient acquisition of both dipole-dipole resistivity and multichannel surface-wave data can be accomplished using an automated multi-electrode resistivity meter and a 24-channel engineering seismograph with 18 active channels employed in roll along mode. A 100m survey using a 2m geophone spacing and a 4m electrode separation can be completed in approximately 6 hours. Electrical and seismic data may be combined in a number of ways to enhance various types of anomalies. For example, the division of resistivity into shear-wave velocity (from the surface-wave inversion) can be used to strengthen the contrast of the alluvium/consolidated rock contact in depth-to-bedrock studies. Similarly, since the likelihood that a resistivity anomaly represents a void is increased if it also displays low shear-wave velocity, the ratio of resistivity to shear-wave velocity will enhance anomalies due to voids and suppress those arriving from other features. In a floodplain survey in Athens, Ohio, this “combined image” enhanced anomalies common to both seismic and resistivity images and suppressed features observed in only one physical property. Thus, combined surface-wave and electrical resistivity surveys can be effective in situations where the need for increased anomaly strength and/or decreased ambiguity in interpretation are worth the additional field work and processing time.
Douglas H. Green, PhD (Advisor)
Gregory C. Nadon, PhD (Committee Member)
Dina Lopez, PhD (Committee Member)
152 p.
Geology; Geophysics
combined methods; surface waves; resistivity; electrical resistivity tomography; multi-channel analysis of surface waves; MASW; bedrock detection; void detection; 2D subsurface imaging; contrast of subsurface features; anomaly strength

Recommended Citations

Citations

  • Tufekci, S. (2009). Combined Surface-Wave and Resistivity Imaging for Shallow Subsurface Characterization [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1250891786

    APA Style (7th edition)

  • Tufekci, Sinan. Combined Surface-Wave and Resistivity Imaging for Shallow Subsurface Characterization. 2009. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1250891786.

    MLA Style (8th edition)

  • Tufekci, Sinan. "Combined Surface-Wave and Resistivity Imaging for Shallow Subsurface Characterization." Master's thesis, Ohio University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1250891786

    Chicago Manual of Style (17th edition)

ohiou1250891786
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© 2009, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.