Coastal retreat and/or advance adjacent to defences in England and Wales
Brown, S., Barton, M.E. and Nicholls, R.J. (2011) Coastal retreat and/or advance adjacent to defences in England and Wales. Journal of Coastal Conservation, 15, (4), 659-670. (doi:10.1007/s11852-011-0159-y).
Retreat and advance of shoreline position occurs naturally, and also as a result of defences which are constructed to prevent erosion and flooding. Retreat more commonly manifests itself down-drift of defences due to sediment deficit causing the coast to become ‘set-back’. Advance normally develops due to sediment accumulation up-drift of a barrier inhibiting longshore drift, resulting in the coast becoming ‘set-forward’.
Many examples of set-backs and set-forwards are recorded, but their location, number and cause is not known on a national scale. Using the Futurecoast aerial photographs, approximately 200 localities were identified as set-back or set-forward in England and Wales, with half situated in the Eastern and South East regions of England. Half of the total set-backs or set-forwards were on cliffed coasts, and half on low-lying coasts.
Without local knowledge it is difficult to distinguish between set-backs and set-forwards. Set-backs often indicate higher retreat rates, thus threatening cliff-top infrastructure which requires defence upgrade and extensions, as well as raising maintenance costs. Monitoring set-backs is important for shoreline management, because as retreat continues, set-backs evolve and artificial headlands form and grow. This is reinforced by the shift from hard defence policies towards softer engineering approaches, managed realignment and limited intervention.
|Subjects:||G Geography. Anthropology. Recreation > GE Environmental Sciences|
|Divisions:||Faculty of Engineering and the Environment > Civil, Maritime and Environmental Engineering and Science > Energy & Climate Change Group
|Date Deposited:||01 Dec 2011 11:20|
|Last Modified:||02 Mar 2012 11:56|
|Contributors:||Brown, S. (Author)
Barton, M.E. (Author)
Nicholls, R.J. (Author)
|Date:||30 June 2011|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
Actions (login required)