Morphodynamics of Modern and Ancient Barrier Systems: An Updated and Expanded Synthesis

McBride, Randolph A.; Anderson, John B.; Buynevich, Ilya V.; Byrnes, Mark R.; Cleary, William J.; Fenster, Michael S.; FitzGerald, Duncan M.; Hapke, Cheryl J.; Harris, Michael S.; Hein, Christopher J.; Johnson, Cari L.; Klein, Antonio H. F.; Liu, B.; Menezes, João Thadeu de; Mulhern, Julia S.; Oliver, Thomas S.N.; Pejrup, Morten; Riggs, Stanley R.; Roberts, Harry H.; Rodriguez, Antonio B.; Seminack, Christopher T.; Short, Andrew D.; Stone, Gregory W.; Tamura, Takeshi; Wallace, Davin J.; Wang, P.

doi:10.1016/b978-0-12-818234-5.00153-x

Cited by 7 publications

(2 citation statements)

References 607 publications

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“…A morphodynamic approach has been applied to coastal barriers around the world (McBride et al, 2022). In Australia, studies of Holocene coastal barrier deposition have been a key contribution of Australian coastal geomorphologists to global scholarship.…”

Section: Introductionmentioning

confidence: 99%

Holocene estuary infill leads to coastal barrier initiation from fluvial sand supply in southeastern Australia

Oliver,

Owers,

Tamura

et al. 2023

The Holocene

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A morphodynamic approach to coastal evolution involves recognition of internal thresholds, feedbacks and boundary conditions and should underpin coastal management. The Holocene evolution of the Bega River estuary and Tathra Beach coastal barrier was examined integrating existing sediment cores and radiocarbon dating, airborne terrestrial and marine Lidar and OSL dating. Sediment coring reveals the Bega River estuary began infilling with fluvial sand once sea levels stabilised at or near their present elevation. Radiocarbon dating suggests a prograding fluvial delta reached the coast approximately 4000–2250 years BP. Barrier deposition commenced ~3200 years ago coinciding with the arrival of fluvial sand at the coast. Shoreline progradation of the Tathra barrier occurred at 0.15 m/year from ~3200 years to present forming a sequence of ~17 foredune ridges which were each active for an average of ~190 years. In the past ~500 years, a sand spit has restricted the entrance of the Bega River estuary to the northern end of the embayment. The infill of the Bega River estuary over the Holocene represents an internal morphodynamic threshold or tipping point, which then enabled coastal barrier deposition as fluvial sand reached the coast. The coastal system approaches another threshold as the Tathra embayment infills, and sediment may be transported northward out of the embayment. At Tathra Beach, the positive sediment budget which resulted in barrier progradation is approximately 0.55 m3/m/year. This signal is masked on the yearly to decadal scale by fluctuations in beach volume an order of magnitude greater (5–20 m3/m/year depending on the timeframe examined). Thus longer-term datasets of beach change or reconstructions from the geological record are needed to underpin management decisions which will impact shorelines decades or centuries into the future.

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Section: Introductionmentioning

confidence: 99%

Holocene estuary infill leads to coastal barrier initiation from fluvial sand supply in southeastern Australia

Oliver,

Owers,

Tamura

et al. 2023

The Holocene

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“…Tidal inlets are found between two barrier islands or downdrift of barrier spits, and are the primary conduits for tidal exchange between marine and backbarrier environments [1,2]. Tidal inlets feature morphologies that include flood-and ebb-tidal deltas (ETDs), located landward and seaward of their inlet throat, respectively, and sandy shoals and channel systems that flank or cut into deltaic deposits [3].…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamics and Sediment-Transport Pathways along a Mixed-Energy Spit-Inlet System: A Modeling Study at Chincoteague Inlet (Virginia, USA)

Georgiou

Messina

Sakib

et al. 2023

JMSE

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Tidal-inlet systems are dynamic features that respond to short-term (e.g., storms) and longer-term processes (e.g., sea-level rise, changes in tidal prism). The Chincoteague Inlet system, located along the northern Eastern Shore of Virginia (USA), is a dynamic coastal complex that experiences rapid change associated with sediment redistribution and a shifting inlet throat due to the southern elongation of adjacent Assateague Island. In this study, a numerical model based on Delft3D with coupled flow–waves, multiclass sediment transport, and morphologic feedback was developed to quantify the hydrodynamic and geomorphic controls within this rapidly evolving inlet–spit system and to develop a more comprehensive understanding of regional to local controls on sediment-transport pathways. Model results show that most of the sand transport along southern Assateague Island is sequestered nearshore and proximally in deeper sinks within Fishing Point, and, of that, only finer sand sizes are transported around the spit, confirming previous analysis and hypothesis. The model also showed that sand transport toward the south increases along Wallops Island and quantified spatially explicit transport trends for selected sediment classes, revealing that coarser sediment bypassing is a punctuated process that is proportional to storms.

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Statistical approach to identify storm deposits and cryptic event layers from grain-size data, Mechelinki, Poland, Baltic Sea

Leszczyńska,

Moskalewicz,

Stattegger

2024

CATENA

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Morphodynamics of Modern and Ancient Barrier Systems: An Updated and Expanded Synthesis

Cited by 7 publications

References 607 publications

Holocene estuary infill leads to coastal barrier initiation from fluvial sand supply in southeastern Australia

Holocene estuary infill leads to coastal barrier initiation from fluvial sand supply in southeastern Australia

Hydrodynamics and Sediment-Transport Pathways along a Mixed-Energy Spit-Inlet System: A Modeling Study at Chincoteague Inlet (Virginia, USA)

Statistical approach to identify storm deposits and cryptic event layers from grain-size data, Mechelinki, Poland, Baltic Sea

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