A note on tidal asymmetry in the Severn Estuary
In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015, more |  |
| Keywords | Environmental effects > Tidal effects
Levels > Water levels > Sea level
Models > Mathematical models
Motion > Tidal motion > Tides
Motion > Water motion > Circulation > Water circulation > Shelf dynamics > Estuarine dynamics
Motion > Water motion > Circulation > Water circulation > Shelf dynamics > Nearshore dynamics
Motion > Water motion > Water currents > Tidal currents
Surges
Water balance
Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Estuaries
ANE, British Isles, Severn Estuary [Marine Regions]
Brackish water |
| Abstract | A one-dimensional, non-linear numerical model is used to investigate the tidally averaged frictional stress and set-up of water level due to tidal asymmetry in the Severn Estuary; these quantities depend on the overtides in the region. A linearized model of the overtides is applied to calculations of the M4 currents in order to delineate the mechanisms responsible for their generation. The relative importance of individual non-linear mechanisms to the tidally averaged stress and set-up is determined; these mechanisms are interactions between tidal flow and changes in depth or breadth over a cross-section, frictional interaction between the tidal flow and Stokes drift, interaction between the tidal fluctuations in water depth and frictional retardation and non-linear advection. |
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