Global ETD Search
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 27 for “"Geophysical techniques"”.
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An integrated approach to groundwater exploration using remotely sensed imagery and geophysical techniques: a case study in the Archean basement and Karoo sedimentary basins of Limpopo Province of South Africa
… GRIP borehole dataset, and a number of follow-up geophysical surveys. iii Overlaying of the boreholes dataset on the map showed positive correlation between borehole yields groundwater potential zones. On the other hand, follow-up Vertical Electrical Sounding surveys revealed the presence of …
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Imaging and mitigating karst features
… that combines both conventional and geophysical techniques has been conducted near Springfield in southwest Missouri, United States. This study, which forms part of the comprehensive subsurface investigation, aimed to (1) image and characterize the subsurface, (2) map variations in …
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3D Seismic Interpretation of Turbidite-Sands from the Gulf of Mexico
… Bank (GB) Block 191 applying both geological and geophysical techniques. The area is located in the Gulf of Mexico 160 miles southwest of Lafayette. Threedimensional seismic data and some well logs were integrated and analyzed to construct a reasonable geological subsurface image. GeoFrame …
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Investigating Town Design and Social Organization at Port Tobacco, Maryland, Through the Use of Archaeology and Geophysics
… 19th century. By employing a methodology of both geophysical techniques and archaeological excavations, I was able to locate and map numerous structures and features associated with town planning and examine how these spaces were used. This data was used to show how social order, power, and wealth …
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The geological evolution and sedimentary dynamics of Hout Bay, South Africa
… was saturated with the latest in cutting-edge geophysical techniques to collect detailed and comprehensive bathymetric, sidescan sonar, magnetic, seismic and beach profiling data. Collectively these data can be used to map offshore geological units as well as infer how Hout Bay has responded to …
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Pushing the Limits: Testing, Magnetometry and Ontario Lithic Scatters
… made to the investigation of these sites. Geophysical techniques applied early in a scatter’s investigation, particularly magnetometry, have the ability to facilitate the extraction of more pertinent data about past peoples and their activities from such sites. Archaeological work was …
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Geophysical investigations of near-surface mine sites in northern West Virginia
… based on limited subsurface information. Use of geophysical techniques to characterize these sites, monitor remedial efforts, and provide additional subsurface information is evaluated in this study. Terrain conductivity (EM31 and EM34) grids as well as resistivity and magnetic profiles were …
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An investigation as to the suitability and effectiveness of geophysical survey techniques as a tool to aid archaeological interpretation of upland sites within the area of south east Wales
Geophysical survey as a tool to aid archaeological interpretation has been shown to be of varied usefulness across the differing site morphology and underlying geology of Wales. Its uptake has also varied greatly between regions with bias often existing towards certain types of site or particular …
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Using Geophysics To Evaluate Levee Stability
… River. Field observation, soil samples, and geophysical data were collected at two field sites located on the border of Tate and Tunica County, MS. The first site consists of a developed shallow slough slide that had occurred that has not yet been repaired and the second site is a potential …
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The Effect of Clay Content and Iron Oxyhydroxide Coatings on the Dielectric Properties of Quartz Sand
… soil that is often measured using non-invasive geophysical techniques in subsurface characterization studies. A proper understanding of dielectric responses allows investigators to make measurements that might otherwise require more invasive and/or destructive methods. Previous studies have …
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Reflection seismic data acquisition and processing for enhanced interpretation of high resolution objectives
… Laboratory, Virginia Tech. Conventional geophysical techniques involving field acquisition and data processing were modified to enhance and maintain high frequency content in the signal bandwidth. Single sweep processing was employed to increase spatial sampling density and reduce low …
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A reappraisal of archaeological geophysical surveys on Irish road corridors 2001-2010. With particular reference to the influence of geological, seasonal and archaeological variables
Geophysical surveys in the Republic of Ireland and elsewhere rarely have the opportunity to receive direct, meaningful and quantitative feedback from ground observed excavations, despite their frequent occurrence as a subsequent phase of development-led archaeological projects. This research …
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Investigating Linkages Between Engineering and Petrophysical Properties of Unconsolidated Geomaterials and Their Geoelectrical Parameters
… "see into the earth" has resulted in the use of geophysical techniques, especially the electrical resistivity method, in engineering and environmental investigations. The major challenge in the use of electrical resistivity measurements however is the interpretation of the electrical response. …
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A reappraisal of archaeological geophysical surveys on Irish road corridors 2001-2010. With particular reference to the influence of geological, seasonal and archaeological variables
Geophysical surveys in the Republic of Ireland and elsewhere rarely have the opportunity to receive direct, meaningful and quantitative feedback from ground observed excavations, despite their frequent occurrence as a subsequent phase of development-led archaeological projects. This research …
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A Self-Potential for Monitoring Self-Sustaining Treatment for Active Remediation (STAR)
… a thermocouple network, with limited resolution. Geophysical techniques, such as Self-Potential (SP), have potential as a non-destructive means for monitoring remediation processes. The SP method measures natural currents flowing in the ground generated by thermoelectric or electrokinetic …
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Use of Georphysics to Map Subsurface Features at Levee Seepage Locaitons
… The aim of this thesis was to implement geophysical techniques at two seepage locations in order to give a better understanding of the causes of underseepage and information on how to mitigate the problem. Sites near Rena Lara in Coahoma County and near Francis in Bolivar County were …
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Ultrasonic velocity measurements of simulated lunar regolith with variable ice content: a laboratory and modeling investigation with implications for geophysical lunar resource exploration
… an economically viable subsurface ice deposit. Geophysical techniques such as seismic methods are routinely used on Earth to extrapolate information from samples over tens of meters to thousands of kilometers and are suitable to do the same for extraterrestrial bodies. This study aims to advance …
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Detection of a Landslide Glide Plane Using Seismic Reflection Methods: Investigation at Little Valley Landslide in Draper, Utah
An integration of geological and geophysical techniques has been used to characterize the internal structure of the Little Valley Landslide in Draper, Utah, USA. The Little Valley Landslide is a pre-historic landslide as old as 13ka B.P. It is found to consist of chaotic and disturbed weathered …
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Geophysical Characterisation and Evolutionary Model of the Quaternary sediments in the North Offaly region of Central Ireland
… and the Brosna River Basin. The capabilities of geophysical techniques were tested as Quaternary sediments mapping tools and the geophysical results obtained, combined with field mapping, were used in the production of an evolutionary model of deglaciation. The geophysical methods employed were …
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The rheology and dynamics of the Precambrian lithosphere – insights from the British Isles
… a range of petrological, geochemical, and geophysical techniques to investigate the properties, behaviour, and evolution of the Precambrian lithosphere. In Chapter One, I summarise some of the key open questions regarding lithospheric evolution and the development of strength contrasts, and …
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