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 54 for “"morphodynamic"”.
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Hydrodynamic and morphodynamic responses to surfzone seafloor perturbations
Holes and channels were excavated in the surf zone on an ocean beach near Duck, NC, and observations of the subsequent evolution of waves, currents, and the modified seafloor were used to investigate nearshore dynamics. In one set of seafloor perturbation experiments, deep holes with steeply …
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Hydrodynamic and morphodynamic responses to surfzone seafloor perturbations
Holes and channels were excavated in the surf zone on an ocean beach near Duck, NC, and observations of the subsequent evolution of waves, currents, and the modified seafloor were used to investigate nearshore dynamics. In one set of seafloor perturbation experiments, deep holes with steeply …
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Integrated Monitoring and Eco-Morphodynamic Modeling of Coastal Dunes
L'abstract è presente nell'allegato / the abstract is in the attachment
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Sand transport in Chioggia Inlet, Venice Lagoon and resulting morphodynamic evolution
… the southern Lagoon Basin, and that significant morphodynamic changes in the barrier-inlet system have taken place. The total loss of sediment from the lagoon was evaluated as 125,770 m3/a, 10% of which is estimated to be sand. In addition, the presence of an ebb-tidal delta, extending from the …
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Medium-Term (Months to Years) Morphodynamic Modelling of a Complex Estuarine System
… focuses on the medium-term (months to years) morphodynamic modelling of natural estuaries. A 2D morphodynamic model based on the Telemac system was calibrated and validated using extensive field measurements' at Teignmouth (UK). Statistical tools indicate that the model is capable of …
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Spatial and temporal scales of the morphodynamic evolution within the Studland complex.
… evolve. The aim was to understand better the morphodynamic evolution of the coastal system over different temporal and spatial scales and identify the extent of changes operating along the beach system. The research has sought to quantify shoreline change from the historical archive by …
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Barrier Island Morphodynamic Insights from Applied Global Sensitivity Analysis and Decadal Exploratory Modeling
… for gaining additional insights into the morphodynamics of these systems, which may help planners make better-informed coastal management decisions. In this series of studies, a recently developed long-term barrier-marsh-lagoon model is evaluated to better understand system morphodynamics …
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Controls on and Morphodynamic Effects of Width Variations in Bed-load Dominated Alluvial Channels: Experimental and Numerical Study
… width imply alterations of the river channel morphodynamics at a variety of space and time scales, implying, for instance, modifications of important controlling parameters, like the width-to-depth ratio, which is closely related to the planform morphology of alluvial rivers. Width adaptation …
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Caratterizzazione morfodinamica della spiaggia del Poetto
… The aim of this study is to investigate the morphodynamic behaviour of a Mediterranean urban beach using a multidisciplinary approach that includes remote sensing, field surveys and numerical models. In particular, the use of video monitoring techniques and numerical modelling provides a low …
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Distribuição espaço-temporal de Scolelepsis cf. squamata (Muller, 1808) (Polychaeta: Spionidae) como ferramenta para estudos da dinâmica sedimentar costeira
… Brazilian coast. The relationship between beach morphodynamics and the spatial-temporal distribution of this species along and across the beach was evaluated in relation to density and body size variables. Sampling was carried out during spring low tides of May/2001, July/2001, November/2001 and …
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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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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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Comparison of Flow Dynamics and Bifurcation Angles in Tributary and Distributary Channel Networks
… of bifurcation angles suggests that additional morphodynamic insight may be gained from further comparative study.</p>
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Investigação de efeitos de escoamento 3D e de ondas de vento na aplicação de um modelo de transporte de sedimentos
… and Hansen (1967), Van Rijn (1984, 2007). Morphodynamic processes occur in three-dimensions, hence 3D models are more realistic to represent them. In fact, in some situations the direction of currents near to the bottom may be significantly different from the direction of the vertical …
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Quantifying turbidity current interactions with topography
… interpreted using laboratory observations and a morphodynamic model describing levee growth. Channel and levee deposits resulting from interactions between turbidity currents and sinuous submarine channels are then studied using reduced-scale laboratory experiments. Measurements of current …
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The sedimentology of bedforms to barforms within tidally-influenced fluvial zones (TIFZx): lower Columbia River, OR/WA, USA, and the lower Chehalis River, WA, USA
… important to understand from a geomorphological, morphodynamic and sedimentological perspective. However, most of the few existing studies of modern TIFZs have investigated a single region within a TIFZ, or relied heavily upon sediment cores and/or trenches. A large percentage of current knowledge …
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Modern Fair-Weather and Storm Sediment Transport Around Ship Island, Mississippi: Implications for Coastal Habitats and Restoration Efforts
… the importance of full topo/bathy datasets for morphodynamic analyses of barrier island systems. Seagrass patches around the island are primarily limited by exposure to wave energy, but are also limited by depth and rapid deposition events. Area and volume trends indicate seagrass habitat will …
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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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Investigating the evolution and formation of coastlines and the response to sea-level rise
… diffusivity timescale, I develop a morphodynamic depth of shoreface closure for a given time envelope, with depth increasing as temporal scale increases. To assess which wave events are most important in shaping the shoreface in terms of occurrence and severity, I calculate the …
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Particle-Resolving Simulations of Dune Migration: Novel Algorithms and Physical Insights
… closure terms in the two-fluid models or hydro-morphodynamic models can be improved, which can contribute to the numerical modeling of sediment transport in engineering scales.
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