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A note on tidal asymmetry in the Severn Estuary
Uncles, R.J. (1981). A note on tidal asymmetry in the Severn Estuary. Est., Coast. and Shelf Sci. 13(4): 419-432. https://dx.doi.org/10.1016/S0302-3524(81)80038-2
In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015, more
Peer reviewed article  

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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

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  • Uncles, R.J., more

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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