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 12 of 12 for “"Submerged Vegetation"”.
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Using high resolution satellite imagery to map aquatic macropyhtes on multiple lakes in northern Indiana
… The Level I classification divided the vegetation into detailed classes of emergent and submerged vegetation based on plant structure. In the Level II classification, these classes were combined into more general categories. Overall accuracy of the Level I classification was 68% for the …
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Analytical and Numerical Models for Velocity Profile in Vegetated Open-Channel Flows
The presence of vegetation in open channel flow has a significant influence on flow resistance, turbulence structures and sediment transport. This study will evaluate flow resistance and scale velocity profile in depth limited flow conditions, specifically investigating the impact of vegetation on …
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Analytical and Numerical Models for Velocity Profile in Vegetated Open-Channel Flows
The presence of vegetation in open channel flow has a significant influence on flow resistance, turbulence structures and sediment transport. This study will evaluate flow resistance and scale velocity profile in depth limited flow conditions, specifically investigating the impact of vegetation on …
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Analytical and Numerical Models for Velocity Profile in Vegetated Open-Channel Flows
The presence of vegetation in open channel flow has a significant influence on flow resistance, turbulence structures and sediment transport. This study will evaluate flow resistance and scale velocity profile in depth limited flow conditions, specifically investigating the impact of vegetation on …
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Habitat, landscape, and climate effects on riparian predator-prey interactions in a human-dominated ecosystem
… during the drought. During the drought, submerged vegetation cover had the greatest effect on predation risk; crayfish survival was higher where crayfish could find refuge in submerged vegetation. In the non-drought year, crayfish size was the most influential variable affecting predation …
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The ecology of larval and juvenile fishes in lowland rivers, with particular emphasis on foraging
… of habitat type (floating-leaved, emergent or submerged vegetation). The highest densities of most zooplankton taxa were found in emergent and floating-leaved vegetation (the least complex habitats) compared with submerged vegetation (the most complex). Feeding activity was higher for larval …
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Momentum and scalar transport in vegetated shear flows
… of vegetative influence. However, the impact of submerged vegetation on the hydrodynamics and mixing processes in aquatic flows remains poorly understood. In this thesis, I present the results of laboratory experiments that describe the salient hydrodynamic and transport features of vegetated …
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The effect of turbulence on survival, dispersal, and swimming behavior of grass carp eggs and larvae
… obstructions in the flow (e.g. rocks, piers, and submerged vegetation), avoiding areas of high shear and seeking low-turbulence, low-vorticity regions. These swimming capabilities were quantified by estimating burst swimming speeds and were correlated with the spatial distributions of turbulent …
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Distribution, Relative Abundance, and Reproductive Seasonality of Larval Fish in the Red River
… in carp may stem from their requirement of submerged vegetation for spawning habitat.</p>
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Biodiversity patterns of wetland macroinvertebrate assemblages in the South-Western Cape, South Africa
… the Cederberg and the Agulhas Plain. Open-water, submerged vegetation and emergent vegetation habitats were sampled separately using a square-framed sweep net with a 23.5cm mouth and 80l1m mesh and physico-chemical attributes measured at each site. A total of 126 taxa emanating from more than 26 …
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Bluegill Seasonal Habitat Selection, Movement, and Relationship to Angler Locations in a South Dakota Glacial Lake
… as encountered. Habitat variables (i.e., depth, vegetation density and height, visual obscurity, and substrate type) were measured during May, August, and October 2003, and the collected measurements used to create habitat coverages in ArcMap. Bluegill location data were assigned to one of five …
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Flow through Rigid Vegetation Hydrodynamics
Better understanding of the role of vegetation in the transport of fluid and pollutants requires improved knowledge of the detailed flow structure within the vegetation. Instead of spatial averaging, this study uses discrete measurements at multiple locations within the canopy to develop velocity …