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Abstract: This thesis uses a reduced tidal signal to calculate poroelastic
properties (hydraulic diffusivity and loading efficiency) of a fault-zone in the Santa
Barbara Basin. The data set utilized shows an attenuated tidal signal at a depth of 1,500
m. Fast Fourier Transform (FFT) and least squares harmonic regression were employed to
decompose the tidal signal and pressure signal at depth. ... read moreThe FFT revealed tidal frequencies
in the signal at depth while the least squares regression determined amplitude and phase of
the five major tidal constituents. Three analytical models were applied to determine
poroelastic properties: treating the amplitude reduction as a measure of loading
efficiency, determining the hydraulic diffusivity based on adaptations of heat flow
solutions and the application of elastic and diffusive model of van der Kamp. A numerical
model in SEEP/W simulates the tidal signal propagation effects into rock units surrounding
the fault-zone.
Thesis (M.S.)--Tufts University, 2013.
Submitted to the Dept. of Civil Engineering.
Advisor: Grant Garven.
Committee: Anne Gardulski, and Christopher Swan.
Keywords: Geological engineering, Civil engineering, and
Geology.read less
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