Publication Date
2023
Document Type
Thesis
Committee Members
Ernest C. Hauser, Ph.D. (Advisor); Doyle R. Watts, Ph.D. (Committee Member); Abinash Agrawal, Ph.D. (Committee Member)
Degree Name
Master of Science (MS)
Abstract
Estimating sediment thickness and bedrock surface geometry is critical for many hydrogeologic studies. The horizontal-to-vertical spectral ratio (HVSR), a passive seismic method is a unique, non-invasive technique for speedily estimating bedrock depth. To record ambient seismic noise, the H/V method employs a single broadband three-component seismometer. A field assessment was conducted on the Wright State University Campus in Dayton, Ohio, to determine the depth (z) and elevation of the bedrock. Data were collected at 60 different locations. A known value for the depth of bedrock on campus was determined using the log from a local water well available from the Ohio Department of Natural Resources. Using this depth and the observed fundamental resonant frequency (f0) the shear wave velocity (Vs) of the glacial drift above bedrock was calculated, which was then used to determine the depth of bedrock and its elevation in relation to the fundamental resonant frequency (f0). The HVSR results generally produced distinct, easily discernible resonance frequency peaks which together with the Vs constrained at the local borehole allowed the depth to bedrock and thereby bedrock elevation to be mapped across campus. The interpreted depth and elevation of the bedrock surface are comparable with previous surveys on campus.
Page Count
126
Department or Program
Department of Earth and Environmental Sciences
Year Degree Awarded
2023
Copyright
Copyright 2023, some rights reserved. My ETD may be copied and distributed only for non-commercial purposes and may not be modified. All use must give me credit as the original author
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
