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 86 for “"Morphodynamics"”.
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Morphodynamics of Ebb-Tidal Deltas
… tools are used to explore ebb-tidal delta morphodynamics. Themes include the dependence on environmental conditions, transitions from equilibrium, and the competing influence of jet currents and opposing waves on ebb-shoal and channel morphology. The work asserts that ebb-tidal delta …
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Modelling the morphodynamics of tidal channels
The present study deals with the morphodynamics of rivers and estuaries. The morphodynamic behaviour of natural systems has been investigated using numerical tools. As a first step the hydrodynamics and morphodynamics of both convergent and non-convergent tidal channels have been studied. The …
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Disclose river morphodynamics processes through experiments
… side of bends (forced bars). Bars play different morphodynamics role on different river planform: e.g., they can trigger and enhance bend evolution in meandering river and separate the single channels of braiding network. Figure 1.3 reports two alternate bar in our experiments on the …
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Data-driven prediction of saltmarsh morphodynamics
… Few studies have attempted to forecast saltmarsh morphodynamics at a system level over decadal time scales. There is no synthesis of existing knowledge available for specific site predictions nor is there a formalised framework for individual site assessment and management. This project evaluates …
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Morphodynamics and driftwood dispersal in braided rivers
… has a relevant, indirect effect on braided river morphodynamics through the establishment of vegetation, whose presence influences network complexity and evolution.
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Hydrodynamics and Morphodynamics in Kinoshita Meandering Channels
… of bend orientation on the hydrodynamics and morphodynamics of transitional meandering channels. Among the hydrodynamic effects, it is observed that downstream skewed configurations produce fully-developed secondary flows around the bend apex, while upstream-skewed configuration results in …
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Meandering rivers morphodynamics - integrating nonlinear modeling and remote sensing
… decades, the systematic investigation of the morphodynamics of meandering rivers mostly involved the theoretical-analytical methodology. The development of analytical models enabled the definition of equilibrium conditions, stability and evolution of river meanders and to investigate the …
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Morphodynamics, sedimentation and sediment dynamics of a gravel beach
The morphodyiiamics of a gravel barrier beadi in Devon, \JK (Slaptou Sands: tau/S 0.15 - 0.25, D50 2 - 8min), was studied with reference to its sedimentology. Three time scales were sampled for nearshore hydrodynamics, intertidal morphologies and sediirientologies. A series of surveys were carried …
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Sand bed morphodynamics under water waves and vegetated conditions
… entire domain of a facility to understand local morphodynamics. The study reports that mild wave reflections of 20% can generate 55% variability in the small-scale bed form geometries. Analysis of high-resolution temporal and spatial bathymetry measurements shows that ripple velocities under …
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Cellular Morphodynamics Reveals Divergent Mechanisms of Gastrulation in Insects
… elusive. To address this gap, I developed a morphodynamics pipeline to segment and analyse 3D cell shapes in an unbiased and quantitative framework. This enabled me to mathematically describe the coordinated cell shape changes responsible for mesoderm morphogenesis in Drosophila. These …
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Integrative high-throughput analyses of aerial morphodynamics in plants
How plants develop and acquire their form is a complex issue driven by a multitude of factors. Like all biological phenomena, the processes underpinning plant development are complex both when viewed collectively, but often also when simplified and viewed in isolation from one another. …
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Experimental and numerical modeling of submarine channel flow and morphodynamics
… as turbidity currents. The flow field and the morphodynamics of these channels, however, remain poorly understood due to dormancy of these systems during the present geologic time. Both laboratory and numerical modeling allow the study of submarine flow and morphodynamics in a controlled …
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Bulle-Effect and its implications for morphodynamics of river diversions
… then explores how Bulle-Effect might impact the morphodynamics of a diversion. This thesis can be divided into two major parts: 1) First the mechanism behind the Bulle-Effect phenomenon is explored using high-resolution numerical simulation (Direct Numerical Simulations, Large Eddy Simulations) …
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Hydrodynamics and morphodynamics of shallow tidal channels and intertidal flats
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1993.
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Morphodynamics of multi-thread rivers Theory and Observations of Channel Loops
Using satellite and aerial imagery, the planform of a large number of bifurcations is gathered and interpreted in terms of quantifiable parameters. The majority of the observed bifurcations displays a conspicuous asymmetry in terms of bifurcation angle, upstream channel curvature, length of the …
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Eco-hydro-morphodynamics and ecosystem services of near-natural river corridors
Near-natural river corridors (NNRs) provide crucial habitat for a host of biota and support the survival of people and nature worldwide at multiple spatiotemporal scales. Furthermore, NNRs represent fundamental references for river conservation, management, and restration, offering the opportunity …
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Long term morphodynamics of alternate bars in straightened rivers: a multiple perspective
… The goals of this work are: i) to quantify the morphodynamics of alternate bars in the Alpine Rhine River, with a particular emphasis on bar migration; ii) to assess to what extent the predictions of analytical bar theories are consistent with field observations and to explore how theories may …
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Multi-decadal morphodynamics of alternate bars in channelized rivers: a multiple perspective
… The goals of this work are: i) to quantify the morphodynamics of alternate bars in the Alpine Rhine River, with a particular emphasis on bar migration; ii) to assess to what extent the predictions of analytical bar theories are consistent with field observations and to explore how theories may …
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Morphodynamics of large anabranching rivers : the case of the Madeira River, Brazil
… Given the limited understanding on large river morphodynamics and the mechanisms of formation and process of anabranching channels, this thesis focuses on elucidating the morphodynamic conditions of a 150-km channel segment of the Madeira River, the largest tributary of the Amazon River and the …
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Coastal Ocean Morphodynamics and the Resulting Erosion and Deposition: An Analytical Approach
<p>Coastal ocean morphodynamics is the study of the morphological change of the coastal ocean system. Environmental conditions, such as climatic and geological controls, are exogenous inputs of the system, which are responsible for geographic variation among coastal oceans. In the coastal ocean …
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