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 75 for “"Tidal currents"”.
-
THE VERTICAL STRUCTURE OF ESTUARINE TIDAL CURRENTS
… both theoretically and experimentally for a tidal channel in a well-mixed estuary. The theory focuses on the use of eddy viscosity models. Surface slope estimates based on tide predictions, current velocity profile measurements, and stress estimates from near bottom turbulence measurements …
-
Turbulence Modelling of Tidal Currents in Rectangular Harbours
… computational models for the prediction of currents and water levels in coastal and estuarine waters via the numerical solution of the depth- and layer-integrated Reynolds equations. As most flows in practice are always turbulent, it is necessary to try and model the turbulence as accurately …
-
Variations of tidal currents measured at deep ocean moorings.
Massachusetts Institute of Technology. Dept. of Meteorology. Thesis. 1966. M.S.
-
Analysis and interpretation of tidal currents in the coastal boundary layer
… band of water adjacent to the coast where ocean currents adjust to the presence of a boundary. Within this zone, roughly 10 km wide, several physical processes appear to be important. One of these, the tides, is of particular interest because their deterministic nature allows unusually thorough …
-
Analysis and interpretation of tidal currents in the coastal boundary layer
… band of water adjacent to the coast where ocean currents adjust to the presence of a boundary. Within this zone, roughly 10 km wide, several physical processes appear to be important. One of these, the tides, is of particular interest because their deterministic nature allows unusually thorough …
-
Scale effects in testing of a monopile support structure submerged in tidal currents.
… are key issues motivating the development of Tidal Current Energy (TCE) technology. Small scale model testing of TCE devices is a major challenge facing the technology due to turbulent flow in tidal currents environment and scaling is a fundamental engineering procedure for prototype …
-
Ice shelf-ocean interactions in a general circulation model : melt-rate modulation due to mean flow and tidal currents
… and are directly coupled to the speed of currents in the ocean mixed layer underneath the ice shelf through a quadratic drag formulation and a bulk drag coefficient. The melt rate parameterization in the MITgcm is augmented to account for this velocity dependence. First, the effect of the …
-
Ice shelf-ocean interactions in a general circulation model : melt-rate modulation due to mean flow and tidal currents
… and are directly coupled to the speed of currents in the ocean mixed layer underneath the ice shelf through a quadratic drag formulation and a bulk drag coefficient. The melt rate parameterization in the MITgcm is augmented to account for this velocity dependence. First, the effect of the …
-
Sedimentary Characteristics of an Estuarine Marsh System and the Roles of Storm Overwash, Micro-tidal Currents, and Organic Production: Big Branch Marsh, Louisiana
… to discern the relative influences of fluvial, tidal, and storm overwash transport dynamics of a micro-tidal estuarine marsh system. Collected sediment samples from tidal channel beds, pond bottoms, and marsh surfaces were analyzed for organic content and particle-size distribution. Parameters …
-
Field observations and numerical model simulations of a migrating inlet system
Waves, currents, and bathymetric change observed along 11 km of the southern shoreline of Martha’s Vineyard include storm events, strong tidal flows (> 2 m/s), and an inlet migrating 2.5 km in ~7 years. A field-verified Delft3D numerical model developed for this system is used to examine the …
-
Field observations and numerical model simulations of a migrating inlet system
Waves, currents, and bathymetric change observed along 11 km of the southern shoreline of Martha's Vineyard include storm events, strong tidal flows (> 2 m/s), and an inlet migrating 2.5 km in ~7 years. A field-verified Delft3D numerical model developed for this system is used to examine the …
-
Tidal band current variability over the Northern California continental shelf
… description and dynamical interpretation of the tidal band current fluctuations over the continental shelf off northern California. The term "tidal band" is used here to denote fluctuations with periods from about one-half to one day, including all the major diurnal and semidiurnal tidal …
-
Tension-Leg Platform for Offshore Diffusor-AugmentedHydrokinetic Turbine
… by a tension-leg platform, to harness ocean and tidal currents for renewable energy production. By incorporating diffuser technology, the turbine’s efficiency is enhanced, increasing the coefficient of power and enabling effective energy capture even in environments with lower current speeds. The …
-
A numerical investigation of tidal current circulation in the Gulf of Maine
… model of Walter Hansen is used to computer tidal heights and tidal currents in the Gulf of Maine. The model uses two adjacent open boundaries at which the tides are prescribed at each time step, using four tidal constituents. The grid size is six nautical miles and the time step is …
-
Interactions between currents and the spatial structure of aquatic vegetation
… to highly turbulent flows dominated by waves and currents. Feedbacks between the dominant currents and the vegetation not only significantly alter the velocity structure of the flow, but play a large role in determining the spatial structure of the vegetation as well. This thesis examines these …
-
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 …
-
Continuously Stratified Flow Dynamics Over a Hollow
… by the interaction of the sloping pycnocline and tidal currents. The formation of internal waves over the leeward side favored the development of vertical shear in the horizontal velocity. Large vertical shears enhanced turbulence and internal waves should have increased form drag resulting in …
-
Tidal dynamics and dispersion around coastal headlands
The dynamics of shallow tidal currents and tide-induced dispersion are investigated around coastal headlands that have alongshore length scales that are comparable to or less than the tidal excursion. Depth-averaged shallow water equations forced by oscillatory flow are solved numerically for …
-
Structure and development of oyster reefs on the Suwannee River delta, Florida
… ebb and flood tides. The reefs are dissected by tidal channels and have a maximum relief of 3 m. No evidence of any buried reef structures dating back to the Pleistocene was found on the delta platform.</p> <p>The three oyster reefs are composed of approximately 70 percent by volume shells and …
Page 1 of 4