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Application Of Seismic Radial Anisotropy For Near-Surface Fractures Identification, Jer-Yu Jeng
Application Of Seismic Radial Anisotropy For Near-Surface Fractures Identification, Jer-Yu Jeng
Dissertations, Master's Theses and Master's Reports
Fractures significantly control the groundwater flow and solute transport in geological settings of low-permeable rocks. Fractures also affect seismic wave propagation. For instance, they can create a directional dependence of seismic velocity with respect to their orientations, known as seismic anisotropy. Seismic radial anisotropy as used here is the difference between the velocity of a vertically polarized S-wave (SV) and one polarized horizontally (SH). In this thesis, seismic radial anisotropy was used to evaluate its usefulness for correlating with near-surface fractures. The seismic radial anisotropy models were obtained at two sites from dispersion analyses of the Rayleigh waves, with vertical …