Beach Erosion: Causes and Stabilization

Dean, Robert G.; Walton, Todd L.; Rosati, Julie Dean; Absalonsen, Luciano

doi:10.1007/978-94-007-5234-4_13

Cited by 3 publications

(2 citation statements)

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“…Hanson, 1989). Typically, whilst such defences may protect the local coast, interruption to longshore transport often causes down-drift increases in coastal erosion (Dean et al, 2013). Barrier structures (groynes and groyne fields) are favoured on coastlines subject to significant littoral drift.…”

Section: Introductionmentioning

confidence: 99%

“…Barriers also set up gradients in longshore transport, which result in accretion of sediment on the up-drift side and erosion down-drift due to the loss of protective sediment influx (Kamphuis, 2000;Bruun, 1995;Bakker et al, 1970). Hence, groyne emplacement strategies are best coupled to complementary beach nourishment (Dean et al, 2013). Groynes generate an offshore current and may result in increased loss of sediment to the offshore (Kraus et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

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Coastal vulnerability of a pinned, soft-cliff coastline, II: assessing the influence of sea walls on future morphology

et al. 2014

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Abstract. Coastal defences have long been employed to halt or slow coastal erosion, and their impact on local sediment flux and ecology has been studied in detail through field research and numerical simulation. The nonlocal impact of a modified sediment flux regime on mesoscale erosion and accretion has received less attention. Morphological changes at this scale due to defending structures can be difficult to quantify or identify with field data. Engineering-scale numerical models, often applied to assess the design of modern defences on local coastal erosion, tend not to cover large stretches of coast and are rarely applied to assess the impact of older structures. We extend previous work to explore the influences of sea walls on the evolution and morphological sensitivity of a pinned, soft-cliff, sandy coastline under a changing wave climate. The Holderness coast of East Yorkshire, UK, is used as a case study to explore model scenarios where the coast is both defended with major sea walls and allowed to evolve naturally were there are no sea defences.Using a mesoscale numerical coastal evolution model, observed wave-climate data are perturbed linearly to assess the sensitivity of the coastal morphology to changing wave climate for both the defended and undefended scenarios. Comparative analysis of the simulated output suggests that sea walls in the south of the region have a greater impact on sediment flux due to increased sediment availability along this part of the coast. Multiple defence structures, including those separated by several kilometres, were found to interact with each other, producing complex changes in coastal morphology under a changing wave climate. Although spatially and temporally heterogeneous, sea walls generally slowed coastal recession and accumulated sediment on their up-drift side.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coastal vulnerability of a pinned, soft-cliff coastline, II: assessing the influence of sea walls on future morphology

et al. 2014

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Coastal Hazards: Geomorphic and Tectonic Hazards

Mukherjee,

Ghosh,

Chanda

2023

Environmental Oceanography and Coastal Dynamics

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Assessing the influence of sea walls on the coastal vulnerability of a pinned, soft-cliff, sandy coastline

Barkwith¹,

Hurst²,

Thomas³

et al. 2013

Preprint

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Abstract. Coastal defences have long been employed to halt or slow coastal erosion. Their impact on local sediment flux and ecology has been studied in detail through field studies and numerical simulations. The non-local impact of a modified sediment flux regime on mesoscale erosion and accretion has received less attention. Morphological changes at this scale due to defended structures can be difficult to quantify or identify with field data. Engineering scale numerical models, often applied to assess the design of modern defences on local coastal erosion, tend not to cover large stretches of coast and are rarely applied to assess the impact of older structures. We extend previous work to explore the influences of sea walls on the evolution and morphological sensitivity of a pinned, soft-cliff, sandy coastline under a changing wave climate. The Holderness coast of East Yorkshire, UK, is used as a case study, represented both as a defended example with major sea walls included and a natural example where no sea defences exist. Using a mesoscale numerical coastal evolution model, stochastic wave climate data are perturbed gradually to assess the sensitivity of the coastal morphology to changing wave climate for both the defended and natural scenarios. Comparative analysis of the simulated output suggests that sea walls in the south of the region have a greater impact on sediment flux due to the increased sediment availability along this part of the coast. Multiple defended structures, including those separated by several kilometres, were found to interact with each other, producing a complex imprint on coastal morphology under a changing wave climate. Although spatially and temporally heterogeneous, sea walls generally slowed coastal recession and accumulated sediment on their up-drift side.

show abstract

Beach Erosion: Causes and Stabilization

Cited by 3 publications

References 14 publications

Coastal vulnerability of a pinned, soft-cliff coastline, II: assessing the influence of sea walls on future morphology

Coastal vulnerability of a pinned, soft-cliff coastline, II: assessing the influence of sea walls on future morphology

Coastal Hazards: Geomorphic and Tectonic Hazards

Assessing the influence of sea walls on the coastal vulnerability of a pinned, soft-cliff, sandy coastline

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