The Formation Of The Shambles And Other Banks By Tidal Stirring Of The Seas
- 1 February 1978
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of the Marine Biological Association of the United Kingdom
- Vol. 58 (1), 211-226
- https://doi.org/10.1017/s0025315400024504
Abstract
It is well known that if a beaker of water, to which a little sand has been previously added, is stirred, then the sand moves along the bottom and accumulates in the centre. The result is the same whether the beaker is stirred clockwise or anticlockwise. It is perhaps less obvious, but equally true, that if the beaker is placed on a rotating table, then stirring clockwise and anticlockwise produces different effects. Any stirring rate in the sense of rotation may produce a concentration of sand towards the centre (better effects may be observed with less dense material – tea leaves for example). However, if the stirring is against the rate of rotation, then it is necessary to exceed the rotation rate before sand will accumulate in the centre of the beaker. In an analogous manner, ‘spinup’ of the table produces dispersion of bottom material, whereas spin-down results in a concentration of material towards the centre of the beaker.Keywords
This publication has 6 references indexed in Scilit:
- Tidal eddies and coastal dischargeJournal of the Marine Biological Association of the United Kingdom, 1977
- Tidal residuals in the English ChannelJournal of the Marine Biological Association of the United Kingdom, 1977
- Average drag in an oscillatory flowDeep Sea Research, 1977
- A note on quadratic friction in the presence of tidesEstuarine and Coastal Marine Science, 1975
- Sediment distribution and Quaternary historyJournal of the Geological Society, 1975
- Tidal sand movement between some linear sand banks in the North Sea off northeast NorfolkMarine Geology, 1970