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 84 for “"Deltas"”.
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Morphodynamics of Ebb-Tidal Deltas
The purpose of this study was to learn more about the significant drivers of ebb-tidal delta morphology using observational methods and fundamental physical relationships between forcing conditions and morphological response. Two techniques were adapted in a novel way to study the dynamics of …
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Plan-view evolution of wave-dominated deltas
… change and human impacts. Currently, many deltas around the world face large sediment deficits because of river damming. I model deltaic response to reductions in sediment load and offer frameworks to predict future deltaic change in these dynamic and threatened coastal regions.
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Plan-view evolution of wave-dominated deltas
… change and human impacts. Currently, many deltas around the world face large sediment deficits because of river damming. I model deltaic response to reductions in sediment load and offer frameworks to predict future deltaic change in these dynamic and threatened coastal regions.
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Simple numerical models for fluvially-dominant river deltas
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2020-08-01
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Seasonal Use of Missouri River Reservoir Deltas by Fishes
… as a result of sedimentation (e.g., reservoir deltas), and recent research suggests that these habitats are important to native fishes and support greater fish diversity than other reservoir habitats. As water resources engineers evaluate sediment management techniques, it is important that …
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Qualitative and quantitative analysis of sedimentary characteristic variability in tide-dominated and -influenced deltas
… documenting tide-dominated and -influenced deltas. For an article to be included it must directly interpret a tide-dominated or tide-influenced delta, separate the information into subenvironments, and present sedimentological information to a degree of completeness. This information was …
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Exploring Sediment Compaction in Experimental Deltas: Towards a Meso-Scale Understanding of Coastal Subsidence Patterns
… boundary conditions of standard laboratory fan-deltas with an experiment which has been treated with a proxy for highly compressible organic rich marsh or peat deposits. Both experiments have non-negligible compactional subsidence rates across the delta-top which are comparable to our boundary …
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Resisting Lynching: Black Grassroots Responses to Lynching in the Mississippi and Arkansas Deltas, 1882--1938
"This dissertation counters histories of lynching that have tended to view black lynch victims and black communities as primarily passive victims of white mob violence. It moves beyond histories of black anti-lynching protest that have primarily focused on prominent black spokespersons and national …
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Resisting Lynching: Black Grassroots Responses to Lynching in the Mississippi and Arkansas Deltas, 1882-1938
… to Lynching in the Mississippi and Arkansas Deltas, 1882-1938” explores the social and cultural history of the black experience of lynching. It highlights the pervasiveness of lynch mob violence, the failure of local, state, and federal governments to prevent lynching and how these factors …
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IMPACTS OF CLIMATE AND REGULATION ON ICE-JAM FLOODING OF NORTHERN RIVERS AND THEIR INLAND DELTAS
… flooding of northern rivers and their inland deltas. As the first step in reducing flood risks, identifying, understanding and quantifying flood hazard will improve our ability to reduce risks and increase resiliency.
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Unifying multi-source data and modeling perspectives to investigate connectivity and material transport in coastal river deltas
River deltas are characteristically complex and dynamic landscapes that build from deposited sediment at the mouths of rivers. Deltaic systems tend to self-organize into an elaborate connected network of channels and islands which interact and exchange fluxes of matter and energy, and understanding …
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Controls on Stratigraphy and Architecture of Shallow-Water Deltas: Examples from the Early Cretaceous of Central-Eastern Spain
Deltas form where a river meets a standing body of water (e.g. ocean) and deposits its sediment load. They are sensitive recorders of the interplay of fluvial (river) processes, that deliver the sediment to the standing body of water, and wave and tidal processes that redistribute the delivered …
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Evaluating subalpine lake delta carbon storage in the Colorado Front Range and Washington Central Cascades
… I sought to explore OC storage in subalpine lake deltas in the Washington Central Cascades and Colorado Front Range with the objectives of determining the magnitude of carbon storage and understanding the differences in storage between the two ranges. I used field, laboratory, and GIS techniques …
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Catastrophic Landscape Modification from Massive Landslide Tsunamis: An Example from Taan Fiord, Alaska
… and documented on several low gradient fan deltas within the fiord make Taan Fiord an excellent laboratory for characterizing geomorphic signatures of a high runup tsunami event. Although interest in this topic is high, most prior post-tsunami surveys are from earthquake-generated tsunamis …
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Comparison of Flow Dynamics and Bifurcation Angles in Tributary and Distributary Channel Networks
… dynamics of channel mouth bifurcations on river deltas can be understood using theory developed in tributary channel networks. Bifurcations in groundwater-fed tributary networks have been shown to evolve dependent on diffusive ground water flow patterns</p> <p>directly adjacent to the channel …
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Sedimentology and Stratigraphy of the Coalmont Formation, Northwestern, North Park, Colorado, U.S.A.
… the Coalmont Formation. Gilbert-type lacustrine deltas have previously been recognized in the Paleocene-Eocene Coalmont Formaton of North Park Colorado, but until now researchers have not applied a fluvial architectural analysis to them and their contributing fluvial systems. Using the …
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Late Quaternary Mississippi River Incised Valley Fill: Transgressive Depositional Packages
… sea level prevented development of shelf phase deltas prior to~10ka. Attenuated rates of sea level rise and periodic avulsions led to development and subsequent abandonment of several shelf phase deltas and barrier island arcs as well as gradual encroachment of the top stratum up the alluvial …
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Afterbody drag prediction for conceptual aircraft design
… of revolution pressure drag. Corrections or drag deltas are then applied to the Integral Mean Slope Truncated afterbody drag estimate. These drag deltas account for various geometric effects and three-dimensional effects. The resulting prediction method is applicable to both axisymmetric and 2-D …
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Investigation of brain ageing in HIV-positive individuals using convolutional neural networks
… model to analyse whether the brain age deltas are significantly higher in HIV-positive individu als compared to HIV-negative controls. Although no statistically significant difference is found in the brain age deltas due to HIV status, further analysis reveals significant cor relations …
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Modeling the Lafourche Delta network in the Mississippi Delta Complex
<p>The distributary channel network morphology on deltas is important for the delta evolution study because channels are the primary conduit for carrying and distributing water, sediment, and nutrients to the coast. Numerical models of river deltas and their channels have improved remarkably over …
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