Scattering of Surface Waves Due to Shallow Heterogeneities

Document Type

Article

Publication Date

2008

Publication Title

SEG Technical Program Expanded Abstracts 2008

Volume

27

Issue

1

First page number:

1283

Last page number:

1287

Abstract

Shallow buried heterogeneities act as diffractors to an incoming surface wave. Experimental and numerical analyses are conducted to analyze the problem and to propose a methodology for mapping shallowly embedded objects. A layered system having a high impedance contrast at the base containing shallowly buried drums is tested experimentally. Stacked maps of frequency, velocity and lateral position show the presence of the drums. A hypothesis is posed that the most significant impact of the shallow obstacle on the incident wavefield is diffraction of Rayleigh wave energy. Synthetic seismograms generated through numerical modeling support the hypothesis. The interpretation of the data is complicated by factors such as acquisition footprint and frequency content. These factors remain to be investigated.

Keywords

Heterogeneous catalysis; Near surface; Seismograms; Surface wave

Disciplines

Civil and Environmental Engineering | Environmental Engineering | Geotechnical Engineering

Language

English

Permissions

Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.

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