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 800 for “"geophysics"”.
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Early lunar geology and geophysics
Despite a number of human and robotic missions to the Moon, there are still important unanswered questions about its early evolution, and how it came to be the object we observe today. Here we use observational, experimental, and theoretical techniques to examine three important events that took …
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Using Geophysics To Evaluate Levee Stability
Shallow slough slides have occurred along the river \side slope of Mississippi River Levees for over sixty years. Shallow slough slides also occur along smaller levees that protect tributaries of the Mississippi River. This investigation takes place along a section of the Coldwater River Levee, a …
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Model Uncertainties and Joint Inversion in Geophysics
Solid Earth geophysics is based on different types of data, such as magnetic, gravitational, electrical and seismic generally collected near or at the surface of the Earth, and is used to estimate physical parameters of the subsurface. The related parameter estimation problems are typically …
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Statistical approaches to certain problems in geophysics
… Institute of Technology. Dept. of Geology and Geophysics, 1953.
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An environment application of self-potential geophysics
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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Potential applications of magnetic gradients to marine geophysics
… Institute of Technology, Dept. of Geology and Geophysics, 1967.
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MOUNTAINHYDRO: INTEGRATING GEOLOGY, GEOPHYSICS AND HYDROGEOLOGY IN A MULTIDISCIPLINARY APPROACH
… approach based on three pillars: geology, geophysics, and hydrogeology. The geological pillar centers on the construction of a 3D geological model derived from a combination of existing geological maps and targeted field observations. The model captures the spatial distribution of …
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Turbulence in geophysics: from rotating, ionized fluids to sediment transport
Part I: "Turbulence in the semiconducting regions of gas giant planets." The 'semiconducting' regions of gas giant planets, which lie between the fully ionized and electrically-neutral regions, have three distinct properties that make the dynamical nature of their flows unique. They are (i) …
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The use of near-surface geophysics for monitoring slopes that affect transport infrastructure
Landslides on transportation networks are becoming increasingly prevalent in response to environmental change, at the same time as demand placed on road and rail infrastructure is growing in line with population growth and economic development. To minimise the impact of slope instability on vital …
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NOVEL SENSOR PLATFORMS BASED ON FABRY-PEROT RESONATORS FOR APPLICATIONS IN ENVIRONMENTAL GEOPHYSICS
… for real-time applications in environmental geophysics.</p> <p>Firstly, a novel Extrinsic Fabry-Perot Interferometer (EFPI)-based fiber-optic sensor for force measurement using a pre-buckled beam was demonstrated. The axial displacement is transferred and amplified to a horizontal deflection …
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Using Geophysics and Terrestrial LiDAR to Assess Stormwater Parameters in Vacant Lots in Philadelphia
Managing stormwater volume and quality has become an important issue in urban hydrology. Impervious cover associated with urbanization increases surface runoff volumes and degrades the water quality of urban streams and rivers. Cities with combined stormwater and sewer lines such as Philadelphia, …
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Interactions between mantle plumes and mid-ocean ridges : constraints from geophysics, geochemistry, and geodynamical modeling
… between mid-ocean ridges and mantle plumes using geophysics, geochemistry, and geodynamical modeling. Chapter 1 investigates the effects of the Marion and Bouvet hotspots on the ultra-slow spreading, highly-segmented Southwest Indian Ridge (SWIR). Gravity data indicate that both Marion and Bouvet …
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From grain to floodplain: evaluating heterogeneity of floodplain hydrostratigraphy using sedimentology, geophysics, and remote sensing
Floodplain stratigraphy, a major structural element of alluvial aquifers, is a fundamental component of floodplain heterogeneity, hydraulic conductivity, and connectivity. Watershed-scale hydrological models often simplify floodplains by modeling them as largely homogeneous, which inherently …
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Positioning in geophysics : applications to GPS seismology, airborne gravimetry, and the Dawn Spacecraft at Vesta
This dissertation presents improvements made on position estimation techniques applied to seismology, airborne gravimetry and planetary gravity recovery. In Chapters 2 and 3, a smoothed ionospheric model computed using GPS phase observations was applied to seismology and airborne gravimetry. The …
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Interactions between mantle plumes and mid-ocean ridges : constraints from geophysics, geochemistry, and geodynamical modeling
… between mid-ocean ridges and mantle plumes using geophysics, geochemistry, and geodynamical modeling. Chapter 1 investigates the effects of the Marion and Bouvet hotspots on the ultra-slow spreading, highly-segmented Southwest Indian Ridge (SWIR). Gravity data indicate that both Marion and Bouvet …
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Archaeological Geophysics, Excavation, and Ethnographic Approaches Toward a Deeper Understanding of an Eighteenth Century Wichita Site
… research, archaeological prospecting using geophysics, and traditional excavation techniques in order to gain a more complete understanding of this important archaeological site. The fortification at the Longest site, as well as possible associated structures and cultural features, were …
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Monitoring water and pollutant leaching at an industrial site using geophysics and a vadose zone monitoring system.
The development of protection and remediation plans for contaminated soil and groundwater require a detailed understanding of water flow dynamics and contaminant distribution in the subsurface. However, the retrieval of such information across the vadose zone is challenging, as most field …
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Investigating Town Design and Social Organization at Port Tobacco, Maryland, Through the Use of Archaeology and Geophysics
<p>This thesis examines the connection between town planning and social organization at the small town site of Port Tobacco in south-central Charles County, Maryland from the beginning of the 18th century through to the end of the 19th century. By employing a methodology of both geophysical …
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