| Title | 2D full-waveform modeling of seismic waves in layered karstic media |
| Publication Type | Journal Article |
| Year of Publication | 2016 |
| Authors | Zheng, Y, Malallah, AH, Fehler, M, Hu, H |
| Journal | GEOPHYSICS |
| Volume | 81 |
| Issue | 2 |
| Pagination | T115 - T124 |
| Date Published | Jan-03-2016 |
| ISSN | 0016-8033 |
| Abstract | We have developed a new propagator-matrix scheme to
simulate seismic-wave propagation and scattering in a multilayered
medium containing karstic voids. The propagator
matrices can be found using the boundary element method.
The model can have irregular boundaries, including arbitrary
free-surface topography. Any number of karsts can be included
in the model, and each karst can be of arbitrary geometric
shape. We have used the Burton-Miller formulation
to tackle the numerical instability caused by the fictitious
resonance due to the finite size of a karstic void. Our method
was implemented in the frequency-space domain, so frequency-
dependent Q can be readily incorporated. We have
validated our calculation by comparing it with the analytical
solution for a cylindrical void and to the spectral element
method for a more complex model. This new modeling
capability is useful in many important applications in seismic
inverse theory, such as imaging karsts, caves, sinkholes,
and clandestine tunnels. |
| URL | http://library.seg.org/doi/10.1190/geo2015-0307.1 |
| DOI | 10.1190/geo2015-0307.1 |
| Short Title | GEOPHYSICS |
