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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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