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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. The ... read moreFFT 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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