Implications of consolidation on barrier beach stability
Implications of consolidation on barrier beach stability
Barrier beaches often overlie backbarrier deposits composed of poorly consolidated sediments. Hence, they can consolidate significantly if loaded. A retreating barrier beach provides such a load. In the static situation of beach nourishment, the increased load of the raised beach volume will also cause increased consolidation. These can lower beach elevation promoting wave overtopping, overwashing and retreat. However, there is limited research concerning the role of consolidation on the stability of barrier beaches worldwide. This paper focuses on this issue using Hurst Spit on the UK south coast as a study site where consolidation is a known significant process (Nicholls, 1985; Burt et al., 2018). It is a storm beach composed of shingle (pebble and cobble) sediments and formerly retreated at 2 to 3 m/yr, Since the later 1990s it has been more stabilized by a major nourishment (Bradbury and Kidd, 1998), but continues to retreat slowly (Figure 1). A second nourishment phase is now being actively assessed following major damage in the large storm of 14 February 2014. In this context, the role of consolidation has been analyzed via new data collection, consolidation modelling and morphodynamic modelling. This paper presents these results and their implications
Nicholls, Robert
4ce1e355-cc5d-4702-8124-820932c57076
Burt, Lauren
2dc0bfd7-65f3-429a-9378-209486633fc6
Smethurst, Joel
8f30880b-af07-4cc5-a0fe-a73f3dc30ab5
Thompson, Charlotte
2a304aa6-761e-4d99-b227-cedb67129bfb
30 December 2018
Nicholls, Robert
4ce1e355-cc5d-4702-8124-820932c57076
Burt, Lauren
2dc0bfd7-65f3-429a-9378-209486633fc6
Smethurst, Joel
8f30880b-af07-4cc5-a0fe-a73f3dc30ab5
Thompson, Charlotte
2a304aa6-761e-4d99-b227-cedb67129bfb
Nicholls, Robert, Burt, Lauren, Smethurst, Joel and Thompson, Charlotte
(2018)
Implications of consolidation on barrier beach stability.
In Coastal Engineering Proceedings.
vol. 1,
2 pp
.
(doi:10.9753/icce.v36.sediment.67).
Record type:
Conference or Workshop Item
(Paper)
Abstract
Barrier beaches often overlie backbarrier deposits composed of poorly consolidated sediments. Hence, they can consolidate significantly if loaded. A retreating barrier beach provides such a load. In the static situation of beach nourishment, the increased load of the raised beach volume will also cause increased consolidation. These can lower beach elevation promoting wave overtopping, overwashing and retreat. However, there is limited research concerning the role of consolidation on the stability of barrier beaches worldwide. This paper focuses on this issue using Hurst Spit on the UK south coast as a study site where consolidation is a known significant process (Nicholls, 1985; Burt et al., 2018). It is a storm beach composed of shingle (pebble and cobble) sediments and formerly retreated at 2 to 3 m/yr, Since the later 1990s it has been more stabilized by a major nourishment (Bradbury and Kidd, 1998), but continues to retreat slowly (Figure 1). A second nourishment phase is now being actively assessed following major damage in the large storm of 14 February 2014. In this context, the role of consolidation has been analyzed via new data collection, consolidation modelling and morphodynamic modelling. This paper presents these results and their implications
Text
Nicholls et al (2018) Barrier beach paper
- Accepted Manuscript
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Published date: 30 December 2018
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licensed under a Creative Commons Attribution License
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Local EPrints ID: 458039
URI: http://eprints.soton.ac.uk/id/eprint/458039
PURE UUID: 0a42622a-74e3-43d0-be71-d03ceaf42dd5
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Date deposited: 27 Jun 2022 16:58
Last modified: 17 Mar 2024 02:58
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Author:
Lauren Burt
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