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Investigating the seasonal variability of electromagnetic soil properties using field monitoring data from Time-Domain Reflectometry probes

Curioni, Giulio (2013)
Ph.D. thesis, University of Birmingham.

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Abstract

Shallow geophysical techniques such as Ground Penetrating Radar (GPR) have been widely used to detect buried utilities. However, these techniques are influenced by ground properties such as the electromagnetic (EM) and geotechnical soil properties. This research focused on the long-term monitoring of these soil properties in the field in order to establish the amount, and the causes, of variation and their impact on GPR results. A Time-Domain Reflectometry monitoring station was developed and was installed in an anthropogenic sandy soil at the University of Birmingham campus (U K). The monitoring lasted approximately 22 months, during which GPR surveys were con ducted over specifically buried targets. The results indicated a significant seasonal variation of the EM soil properties. The variation was found to be strongly dependent on the amount of rainfall and only marginally related to the variation of soil temperature. This variation was shown to affect the GPR results. During wet periods and soon after rainfall events the quality of the GPR images reduced considerably, making it difficult to distinguish some of the buried targets. The seasonal variation of the EM soil properties should be taken in to account when planning GPR surveys in order to maximize the detection of buried utilities.

Type of Work:Ph.D. thesis.
Supervisor(s):Chapman, David and Metje, Nicole
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:School of Civil Engineering
Subjects:QC Physics
QE Geology
T Technology (General)
TA Engineering (General). Civil engineering (General)
TK Electrical engineering. Electronics Nuclear engineering
Institution:University of Birmingham
ID Code:4255
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
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