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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 92 for “"Ground Penetrating Radar (GPR)"”.
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3D GROUND-PENETRATING RADAR (GPR) INVESTIGATIONS: BURIED CULVERTS, HISTORICAL GRAVES, A SANDSTONE RESERVOIR ANALOG, AND AN IMPACT CRATER
Ground-penetrating radar (GPR) is used to characterize a variety of subsurface targets such as buried culverts, historical graves, reservoir analogs, and impact craters. In the first case of “buried culverts” I evaluated the GPR performance across five antenna frequencies to determine which would …
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Planning for monitoring of probe hole drilling and pre-excavation grouting with measurement while drilling (MWD), vibration monitoring, and ground penetrating radar (GPR)
… to mitigate the significant risk caused by high groundwater pressures and potentially high groundwater inflows. The current state of the practice involves measuring groundwater inflow rates through the probe holes and comparing the measured inflows to pre-determined, project specific baseline …
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Surface and Sub-Surface Analyses for Bridge Inspection
… bridge inspection using multiple sensors (e.g. ground penetrating radar (GPR) and visual sensor) has been proposed. In the first part of this research (discussed in chapter 3), the focus is towards developing effective and novel methods for rebar detection and localization for sub-surface bridge …
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Detection And Evaluation Of Exisiting Pavement System With Brick Base
… costs, a nondestructive instrumentation of Ground Penetrating Radar (GPR) was employed in the detection of bricks. This geophysical survey system distinguishes materials based on their different electrical properties that depend upon temperature, density, moisture content and impurities by …
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Applying generative adversarial networks to intelligent subsurface imaging and identification
… training data for machine learning models in Ground Penetrating Radar (GPR) data classification and identification, this thesis focuses on the generation of realistic GPR data using Generative Adversarial Networks. An innovative GAN ar- chitecture is proposed for generating GPR B-scans, which …
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Nondestructive testing of concrete bridge decks using ground-penetrating radar and the chain drag method
… bridge deck analysis: the chain drag method and ground penetrating radar (GPR). The chain drag testing was performed in the laboratory with 23 simulated concrete bridge deck specimens. The specimens contained varying internal conditions such as with/without steel reinforcement and with air and …
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The Usefulness of Ground Penetrating Radar in locating burials in Charity Hospital Cemetery, New Orleans
… considered selling a portion of the property ground penetrating radar (GPR) and thermal infrared (TIR) data were collected in the cemetery to locate unmarked graves. The TIR data could not be used because the expert died before compiling the TIR data. Therefore, the GPR data was the sole …
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Microbial Activity during Biodegradation and its Effects on Groundwater Velocity in a Contaminated Aquifer
… and biodegradation in the aquifer. Changes in groundwater velocity associated with biological activity, were measured with point velocity probes (PVPs) arranged into multilevel standpipes and installed into the flow gate. PVP results were compared with electromagnetic wave velocity measurements …
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Laboratory Electrical DC Resistivity of Serpentinite, Graphite, Oxide and Sulfide Minerals
Radar remote sensing and Ground Penetrating Radar (GPR) are effective techniques for geological subsurface investigations. Planetary missions, such as Apollo-17 and Change-3, have used GPR as a tool for investigating the Earths moon surface. Electrical DC resistivity of chalcopyrite, galena, …
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A Shifting Island Landscape: Changes in Land Use and Daily Life in the 19th and 20th Century Village of Inishark, Co. Galway, Ireland
… and Irish Census documents, combined with ground-penetrating radar (GPR) survey and archaeological excavation, were used to understand how historical pressures impacted island life. Inishark's geographic isolation creates a unique case study to understand the impact of historical pressures …
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Application of Electromagnetic Methods to Identify and Characterize Sub-surface Structures Associated with the Coles Hill Uranium Deposit
… Chatham Fault location has been inferred from ground conductivity and ground penetrating radar (GPR) surveys. Anomalies in the data are consistent with previously mapped fault locations based on drillhole and geophysical data, such as gravity and magnetic surveys, collected in the 1980s. These …
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Design of an Ultra-Wideband Spiral Antenna for Ground-Penetrating Microwave Impulse Radar Applications
<p>Radar systems that allow early detection of underground IEDs can save lives. The Microwave Impulse Radar (MIR) capable of IED detection requires antennas capable of transmitting sub-nanosecond pulses over ultra-wideband (UWB) frequency ranges. This thesis investigates the suitability of a novel …
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From grain to floodplain: evaluating heterogeneity of floodplain hydrostratigraphy using sedimentology, geophysics, and remote sensing
… their effects on hydrologic processes such as groundwater flow and transport and hyporheic exchange. This study, conducted in the East River Basin, Colorado, USA, combines point-, meander-, and floodplain-scale data to explore the importance of detailed field studies and physical representation …
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Cone penetration testing in polar snow
… assessment, extrapolation of CPT data via Ground Penetrating Radar (GPR) and preliminary mini-cone penetrometer testing in Greenland. Analysis of results revealed that assessing the strength of polar snow via CPT is affected by numerous factors including penetration rate, cone size/shape …
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In-Situ Recycling: Applications, Guidelines, and Case Study for Local Governments
… VA, using Falling Weight Deflectometer (FWD) and Ground Penetrating Radar (GPR). Additionally, using the FWD and GPR data, alternate recycled designs were proposed in addition to a cost comparison to a conventional design.
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Effects of 11 Years of CO2 Enrichment on Root Biomass and Spatial Distribution in a Florida Scrub-Oak Ecosystem
… chambers from 1996-2007. Minirhizotrons and ground-penetrating radar (GPR) were used to measure fine root (< 2 mm diameter) and coarse root (> 5 mm diameter) biomass, respectively. After 11 years of CO<sub>2</sub> enrichment, there was a trend of greater total root biomass under elevated …
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An Evaluation of Geophysical Methods in the Detection of Toddler-Sized Burials During the First Six Months of Burials
… evaluate the efficacy of different instruments. Ground-penetrating Radar (GPR), magnetometry, resistivity, conductivity, and susceptibility survey data were collected over the first six months of interment at approximately 30-day intervals for two research plots: an open grassy area and a wooded …
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Identifying lateral spread fissures with ground penetrating radar in the New Madrid seismic zone
Ground penetrating radar (GPR) surveys have been conducted to identify the size, shape and orientation of relict lateral spread fissures created during the New Madrid earthquakes of 1811 and 1812. Aerial imagery was used to locate regions with elongate vented sand indicative of large-scale …
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Nondestructive evaluation of wooden logs using ground penetrating radar
… scanning of logs using techniques such as Ground Penetrating Radar (GPR) prior to sawing can greatly increase the productivity and yield of high value lumber. Currently GPR has been widely used for civil engineering applications for nondestructive testing of bridges and highways. GPR is …
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