Beach sediment sorting and beach cusp development in Poole Bay: Southbourne to Hengistbury Head

Haywood, Ian G. (2007) Beach sediment sorting and beach cusp development in Poole Bay: Southbourne to Hengistbury Head. BSc dissertation, University of Portsmouth.

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    An understanding of the coastal and shoreline system is important, as studies of the dynamic environmental interactions between incident wave energy and the shoreline affect the sediment evolution and subsequently govern the overall shape of coastlines. The study was undertaken on a section of Poole Bay, ranging from Southbourne at the western most end, to Hengistbury Head in the east, half of the study area was on a section of beach which had just been replenished six months prior to the beach profiles and samples being taken. Profiles and samples from the replenished beach showed, a much wider beach face than on the non-replenished section in addition to this the replenished beach displayed a much lower degree of sediment sorting. After a day was spent assessing the area, it was decided to also study the beach cusp formations and see what affect wave action had upon them, so over a period of six months five visits were made to the beach to study the formations. It was found that the spacing of the beach cusps increased with greater wave periods, yet decreased the greater the wave height became. Cusp depth was found to not be affected by wave height; it had a very strong correlation with increasing swash excursion, and was also affected by the wave period.

    Item Type: Dissertation
    Departments/Research Groups: Faculty of Science > Department of Geography
    Depositing User: Jane Polwin
    Date Deposited: 20 Jan 2011 12:47
    Last Modified: 28 Jan 2015 11:13

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