|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
In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714, more
Estuaries; Estuarine dynamics; Mathematical models; Nearshore dynamics; Sea level; Surges; Tidal currents; Tidal effects; Tides; Water balance; ANE, British Isles, Severn Estuary [Marine Regions]; Brackish water
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.