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.
Results
Showing 1 to 20 of 23 for “"Tidal Range"”.
-
Analysing the performance of the Archimedes screw turbine within tidal range technologies
The UK has an enormous potential for tidal range energy. With the threat of global warming and the decline of the North Sea oil industry, national energy focus is shifting towards this form of renewable energy. Following in the footsteps of the first tidal barrage scheme in La Rance, the 320MW …
-
Analysis of the Tidal Range in the Sacramento San Joaquin Delta from 1857 to Present
… to channel width, depth, and length alter tidal range in the Sacramento San Joaquin Delta?</p> <p>In this study, archival tidal records were evaluated at many stations throughout the San Francisco Bay and Delta, with a focus on San Francisco, Rio Vista, Sacramento, and Stockton daily, …
-
Microphytobenthos (MPB) biomass variability and sediment- water column exchanges on an intertidal flat: Influence of weather-related abiotic factors across neap-spring-neap tidal cycles
… was investigated on transects across Fingringhoe Tidal Flat in Colne estuary, on three zones: the mud flat, the transition zone and the salt marsh. The results of this thesis suggest that MPB distribution on intertidal flat was controlled by a set of complex interaction between the MPB with both …
-
Sea level and climate variability at Zanzibar
… with two high and two low water levels in each tidal day. Over the monthly cycle, two spring and two neap tides with different tidal ranges are observed. The tidal range may vary depending on the season of the year.
-
The control of wind and waves on sediment transport asymmetry and the long-term morphological development of estuaries
… of estuarine basins highlight the dominance of tidal asymmetry in controlling the hydrodynamic and morphodynamic feedbacks that ultimately lead to a stable morphological state. This thesis uses field measurements, numerical modelling and sediment deposition records to investigate how waves …
-
Circulation through the mouth of Langebaan Lagoon and implications
… by the tide. It was found that during high tidal range periods, there existed an asymmetry between the ebb and the flood flows at both of the lagoon's inlets. When tidal forcing was strong, water particles released at the lagoon inlets during the ebb were subject to long drifts. The outflow …
-
Coastal vulnerability assessment of Co. Dublin and Co. Wicklow to impacts of sea-level rise
… slope, aspect, geomorphology, cliff type, mean tidal range, shoreline changes, mean significant wave height and relative sea-level rise. A case study to complement shoreline change evaluation was also carried out in south Co. Dublin using multi-temporal digital elevation models to assess …
-
Effects of light and nutrient gradients on the taxonomic composition, size structure and physiological status of the phytoplankton community within a temperate eutrophic estuary
… ecosystems which are affected by a large range of environmental factors. It is important to measure, characterise and monitor the ecological status of estuaries, and this is the contribution of this thesis for phytoplankton communities in Southampton Water. The size structure and species …
-
Physical Processes that Affect Hypoxia in the Thames River Estuary, USA
… oxygen paired with monthly monitoring of tidal cycles provide new insight to the pattern of the anoxic and hypoxic conditions that are present in the harbor during the summer months. Regular monthly low salinity/increased dissolved oxygen events were observed. A significant correlation was …
-
Fine-grained sedimentation on the Chenier Plain Coast and inner continental shelf, northern Gulf of Mexico
… sediment and advect it shoreward, and a low tidal range. This study constrains the present influence of the Atchafalaya River on stratigraphic evolution of the inner continental shelf in western Louisiana. Sedimentary and acoustic data are used to identify the western limit of the distal …
-
Fine-grained sedimentation on the Chenier Plain Coast and inner continental shelf, northern Gulf of Mexico
… sediment and advect it shoreward, and a low tidal range. This study constrains the present influence of the Atchafalaya River on stratigraphic evolution of the inner continental shelf in western Louisiana. Sedimentary and acoustic data are used to identify the western limit of the distal …
-
Coastal Wetland Dynamics Under Sea-level Rise and Wetland Restoration in the Northern Gulf of Mexico using Bayesian Multilevel Models and a Web Tool
… by relative RSLR, vegetation productivity, tidal range, coastal slope, and wave height – all interacting with river-borne sediment availability, indicated by hydrological regimes. These interactions have not been comprehensively investigated before. I further modified this model to assess …
-
Tropical intertidal seaweed turf communities of Jesser Point, Sodwana Bay, South Africa
… well as being primary producers within both intertidal and subtidal ecosystems. Biodiversity and biomass patterns of the intertidal algal turfs at Sodwana Bay, South Africa have not yet been established so this study was undertaken to investigate these. It was hypothesised that both biodiversity …
-
The role of coastal defence structures in channeling production in coastal ecosystems
… were differences in spring<br/>and neap tidal range, wave height and sea temperature. Greatest deposition occurred during<br/>months of lower wave height and fewer storms, when filamentous red algae and ephemeral<br/>green algal species dominated. Results indicated to greater amounts of …
-
Early life history of snapper (Chrysophrys auratus) in northern New Zealand
… positively correlated with temperature, tidal range and on-shore winds (of the previous day) in some harbours, suggesting that these variables facilitate the on-shore transport of larvae. High temperatures are likely to be important for larval survival, with average water temperatures …
-
Particle-Water Interactions of Ni and Zn in Coastal Waters
… zone were influenced by residual flow and tidal range at the mouth of the estuary, as well as wind speed and direction. Estimated fluxes of dissolved and particulate Ni and Zn from the Humber mouth to the North Sea indicated significant seasonal variation for both metals (17-290 kg dayˉ¹ …
-
Aspects of sea level variability in the southwest Indian Ocean and the east coast of Africa - (latitude 0-35°S and from the coast to 60°E)
… is due to the effects of tides which exhibit tidal range variations with latitude and shelf width, storm surges resulting from tropical cyclones passage especially in the mid-latitude region, atmospheric pressure fluctuations over the surface of the sea and local wind fields. Sea surface …
-
The Influence of Multiple Scales of Environmental Context on the Distribution and Interaction of an Invasive Seagrass and its Native Congener
… at multiple spatial scales. In its introduced range, the invasive seagrass <italic>Zostera japonica</italic> often grows at higher elevations than its native congener, <italic>Zostera marina</italic>, but at some sites the congeners overlap. At overlapping sites, the two seagrasses often grow …
-
Variabilidad espacio-temporal de la porosidad de la arena tras una regeneración de playa
… in the southwest of Spain according to the tidal range, grain size and beach morphology in several terms. Complete monitoring of the density, humidity, grain size analysis and modified Proctor compaction test was performed at all beaches over the very short, short, medium and long term …
-
Friction and Wear Performance of Lifeboat Launch Slipways
… is no natural harbour or where there is a large tidal range it is necessary to use an inclined slipway to launch a large lifeboat. Lifeboat slipway stations consist of an initial section where the boat is held on rollers followed by an inclined keelway of nickel/chromium coated steel, the …
Page 1 of 2