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 11 of 11 for “"Topographic effects"”.
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Topographic Effects in Strong Ground Motion
… to be affected by earth's surface topography. Topographic effects are a result of several physical phenomena such as the focusing or defocusing of seismic waves reflected from a topographic feature and the interference between direct and diffracted seismic waves. This typically causes an …
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Dynamics of the Antarctic circumpolar current : evidence for topographic effects from altimeter data and numerical model output
… propagating eddies and rings may be spawned at topographic features. Detailed examination of spatial and temporal variability in the altimeter data indicates a spatial decorrelation scale of 85 km and a temporal e-folding scale of 34 days. The sea surface height variability is objectively mapped …
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Dynamics of the Antarctic circumpolar current : evidence for topographic effects from altimeter data and numerical model output
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1995.
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Topography effects in the 1999 Athens earthquake : engineering issues in seismology
… to weak motion data and the later have treated topographic asperities as simple geometric irregularities on the surface of homogeneous, linearly elastic halfspaces. Despite the qualitative agreement between theory and observations on topography effects, there is still much uncertainty concerning …
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Approaches to earthquake scenarios validation using seismic site response
… spectral ratios. Directional effects were also investigated by computing the spectral ratios after rotating the horizontal components of motion and performing polarization analysis. Results of noise and earthquakes analysis, although show significant differences in amplitude, …
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Case Study: Settlement at Nepal Hydropower Dam during the 2014-2015 Gorkha Earthquake Sequence
… that take into account below and above grade topographic effects on the ground motions and settlements at the ground surface.
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Influence of topographic stress on rock fracture : a two-dimensional numerical model for arbitrary surface topography and comparisons with borehole observations
Theoretical calculations indicate that topographic stresses in some landscapes may be large enough to fracture rocks, which in turn could influence slope stability, erosion rates, and bedrock hydrologic properties. These predictions typically have involved idealized topographic profiles, with few …
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Seismic hazard analysis and seismic slope stability evaluation using discrete faults in northwestern Pakistan
… the effect of vertical ground acceleration, topographic effects, and bond break effects, in addition to the strong horizontal ground acceleration, as factors that contribute to the landslide distribution near earthquake source. Landslide database from four earthquake cases (1989 Loma-Prieta, …
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Influence of Mesoscale Eddies on the Deep Ocean Dynamics over the East Pacific Rise near 10N
… propagating westward across the ridge and "topographic flows". Second, the relationship between subinertial flows and internal waves were investigated. The observations reveal subinertial modulations of internal waves, particularly near-inertial oscillations and internal tides. These …
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Hydrography and flow in the rift valley of the Mid-Atlantic Ridge
… are isolated from the water on the ridge flanks. Topographic effects therefore have a significant impact on the rift-valley hydrography and dynamics but little is known about the details. Known processes of global importance acting near the axes of midocean ridges include high rates of diapycnal …
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Near-surface tornado wind field estimation using damage patterns
… idealized vortex models to accommodate external effects (e.g., RFD surge, topographic effects) are presented. The parameters of real tornadoes are then estimated and the near-surface wind field is recreated using the estimated parameters. The estimated wind speeds are compared with independent …