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 76 for “"Wave action"”.
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The underscour of rubble mound breakwaters by wave action
… flexible with respect to settlement, favourable wave energy dissipation, fitness for any water depth and foundation, and because of their economical nature if rubble-stones are readily available. A complete failure of the rubble mound structure can be expected if the stone gradation is improper …
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Effects of Wave Action on the Structure of Fish Assemblages Across an Exposure Gradient
… function and diversity of ecosystems. Increased wave exposure to salt marsh can disturb sediments and cause a loss of habitat. The purpose of this study was to explore the effects of increased wave exposure on diversity, abundance, and functional ecology of estuarine fishes. If increased wave …
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Dynamics of fluid-filled porous media under wave action : Excitation of surf-beats in the ocean
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1980.
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Patterns of recruitment, growth and mortality of the mussel, Mytilus Galloprovincialis in relation to wave exposure and tidal elevation
… Africa: Camps Bay and Groenrivier. Specifically, wave exposure and zonation were examined for their effect on mussel cover and total density, mussel size and recruit intensity. Two areas were compared at Camps Bay; the first was a prominent rock experiencing heavy wave action, and the second was a …
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Patterns and causes of intertidal community structure around the coast of Southern Africa
… were largely due to the effect of differential wave action, but also included the vertical gradient of desiccation. Gradients of wave action generate divergence of the mid-to-low zone communities, whereas in the upper shore communities converge due to the desiccation gradient. The consistent …
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Análise da resposta de estruturas offshore submetidas à ação do mar
… using different theories and techniques for wave action. The aspects relative to the soil-foundation interaction problem, including their non linear characteristics, are discussed. A computational procedure, taking into account the coupling between the superstructure and its foundations, is …
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The interaction of periodic surface gravity waves with slowly varying water currents
The governing equations for interactions between surface gravity wavetrains and slowly-varying water currents are derived and the incorporation of Vocoidal water wave theory into this framework is discussed. The emphasis throughout is on the derivation of the general form of the governing equations …
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Erosion of fractured banks, Lake Sakakawea, western North Dakota
… was rapid (l.Sm/yr) and factors related to wave action, including fetch, bank orientation, and beach composition, were most important. Since 1986, low lake levels have persisted and wave action has not been a factor; however banks continue to recede, but at a slower rate (0.2m/yr), and bank …
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The population biology of Ligia oceanica (L.)(Crustacea: Oniscoidea)
… (L. ) inhabiting a sea-wall exposed to moderate wave action have been studied over a period of three years. Sex ratio, size at maturity, growth, breeding phenology, size and age structure, population density and size, female breeding size, fecundity regression and broodpouch mortality have been …
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Taxonomy and ecology of South African reef corals
… The study lead to the assumption that wave-action and sedimentation are the most important abiotic factors influencing these coral communities. These hypotheses were experimentally tested in the field and in the laboratory, using indicator species for specific community types, as …
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On finite difference solutions for the ocean wave spectrum in regions of non-uniform water depth
… the determination of the sea state in terms of wave spectra. The phenomenon was calculated for two different bathymetries. The purpose is to develop a finite difference method with an upwind differencing scheme to g solve several formulations of the wave action conservation equation. The …
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The role of coastal defence structures in channeling production in coastal ecosystems
This study assessed the interaction of coastal defence structures (CDSs), namely shore-parallel<br/>‘low crested breakwater structures’ (LCSs), design features and hydrodynamic regime on the<br/>quantity and timings of macroalgae deposition. The employed sampling strategy comprised a<br/>spatially …
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Finite element analysis of cellular structures subjected to wave loads
… cyclic unbalanced lateral loads imposed by the wave action;This study was initiated as an investigation of the cell failures of the Calumet Harbor Breakwater structure in the South Chicago Harbor. The primary objective was the assessment of the interlock force fluctuations in the sheetpiles …
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An evaluation of the harbor of Yokosuka, Japan as a typhoon haven.
… passage of tropical cyclones, port facilities, wave action and storm surge. Problems to be considered when remaining in port and possible evasion procedures for ships sortieing are examined. Tropical cyclone tracks from 1947-1973 for the western North Pacific'were analyzed to determine the …
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Análise da resposta dinâmica de um modelo em escala reduzida de plataforma offshore do tipo T.L.P.
… responses from tests under impacts and under wave action with different incident angles are reported. Experiments performed on the reduced sclae model have allowed calibration of numerical models as well as the observation of relevant effects that arise from fluid-structure interaction. …
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Biology and ecological energetics of the supralittoral isopod Ligia dilatata
… of plant material are exported due to the heavy wave action experienced (Field et al., 1977; Velimirov et al., 1977). Attempts have been made to trace the fate of the kelp which is exported to adjacent beaches. A study by Muir (1977) showed the importance of kelp debris for the sandy beach …
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Numerical modelling of an offshore pipeline laid from a barge
… tension is sought, whilst the response due to wave action and barge motion is of interest in the dynamic analysis. Numerical experiments show the suitability of ABAQUS to model the behaviour of slender structures under both static loads and dynamic excitations.
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MULTI-FACTOR ANALYSIS OF HYDRO-MORPHOLOGICAL DYNAMICS IN THE PAJARO RIVER LAGOON
… in 300m versus 200m of total channel migration. Wave dynamics remained remarkably similar between years, confirming discharge as the dominant forcing mechanism. However, seasonal analysis revealed a "Goldilocks" effect where moderate discharge combined with significant wave forcing in fall, or …
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An investigation of certain waterfowl food plants and a botanical survey of Back Bay National Wildlife Refuge, Princess Anne County, Virginia
… of the water. The chief cause of turbidity is wave action due to wind. The action of carp is a secondary cause. In the view of the extreme difficulties and expenses of controlling turbidity, no management practices can be recommended for increasing the growth of submerged aquatics other than …
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Mapping Belizean bonefish, permit, and tarpon fisheries and their threats
… occurring in shallow waters sheltered from ocean wave action. Decline in seagrass distribution was observed in deeper waters subjected to ocean currents and potential dredging. The results of both studies are assimilated to discuss potential avenues of research and the prioritization of …
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