The Physical Condition of South Carolina Beaches 1980–2010

Kana, Timothy W.; Traynum, Steven B.; Gaudiano, Dan; Kaczkowski, Haiqing Liu; Hair, Trey

doi:10.2112/si_69_6

Cited by 8 publications

(3 citation statements)

References 20 publications

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“…The town of Hilton Head has been maintaining a healthy beach for tourism mainly through beach nourishment and has completed three major beach nourishments in 1990, 1997, and 2006/07. The rate of nourishment over the past 30 years appears to have been roughly twice the underlying erosion rate, leaving HHI with significantly more beach/dune area in 2010 [15]. Previous dredge pits have been located on the southwest side of the ebb tidal delta and have been shown to infill with layers of mud and sand.…”

Section: Methodsmentioning

confidence: 99%

Tidal and Storm Impacts on Hydrodynamics and Sediment Dynamics in an Energetic Ebb Tidal Delta

Wren

2020

JMSE

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Bottom-mounted instrumentation was deployed at two sites on a large sandy shoal of an ebb tidal delta offshore of the Port Royal Sound of South Carolina of USA to collect hydrodynamics and sediment dynamics data. One site (“borrow site”) was 2 km offshore in a dredge pit for nearby beach nourishment and the other site (“reference site”) was 10 km offshore. In situ time-series data were collected during two periods after the dredging: 15 March–12 June (spring) and 18 August–18 November (fall) of 2012. Data at the reference site indicated active migrating bedforms from centimeters to decimeters tall, and sediment concentrations were highly associated with semidiurnal and fortnightly tidal cycles. In the fall deployment, waves at the reference site were higher than those at the shallow borrow site. Both Tropical Storm Beryl and Hurricane Sandy formed high waves and strong currents but did not generate the greatest sediment fluxes. The two sites were at different depths and distances offshore, and waves contributed more to sediment mobility at the reference site whereas tidal forcing was the key controlling factor at the borrow site. This study provides valuable datasets for the selection of sites, prediction of pit infilling, and the modeling of storm impact in future beach nourishment and coastal restoration projects.

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Section: Methodsmentioning

confidence: 99%

Tidal and Storm Impacts on Hydrodynamics and Sediment Dynamics in an Energetic Ebb Tidal Delta

Wren

2020

JMSE

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“…In this sense, mean tidal ranges show an increment from 0.6 m at Pocitos to 6.73 m at the San Antonio harbor (Table 1) in less than 200 km. This increase in tidal ranges conditions the extended banks flanking tidal inlets (Kana et al, 2013). Tidal dynamics within the gulf is characterized based on observations and models (Moreira et al, 2009).…”

Section: Settingmentioning

confidence: 99%

Cambios morfodinámicos de las playas condicionadas por la fluctuación holocena del nivel del mar: Playas mesomareales del Norte de la Patagonia

Isla,

Bértola,

Fernández

et al. 2023

AGL

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La morfodinámica de playas fue enunciada como dependiendo del clima de olas, el rango de mareas y el tamaño de grano. La disponibilidad de sedimento es un factor condicionante heredado. Siete playas naturales del norte de Patagonia: 4 de la Provincia de Buenos Aires y 3 de Río Negro fueron relevadas durante 7 años. La playa de La Chiquita se caracteriza por la abundancia de arena fina aportada por el delta del Río Colorado. La Playa Pocitos es relativamente estable aunque está cambiando debido a la colonización por la ostra formadora de arrecifes Crassostrea virginica. Faro Segunda Barranca es una playa abierta muy afectada por tormentas extratropicales del SE. La playa de la Villa Siete de Marzo tiene una dinámica activa afectada por los embancamientos de la desembocadura del Río Negro y tormentas episódicas. La playa del Balneario El Cóndor es muy ancha con una caudalosa deriva litoral de oeste a este. La playa frente al Faro San Matías (Península Villarino) está controlada por una plataforma de abrasión cercana al límite de la bajamar. La playa Las Grutas está también controlada por una plataforma de abrasión aunque la abundancia de arena está relacionada al delta de reflujo de la Bahía de San Antonio. Las playas abiertas de la Provincia de Buenos Aires son muy afectadas por una deriva litoral hacia el norte inducida por olas del Atlántico Sur. Por el contrario, las playas de Río Negro son afectadas por fuertes vientos del oeste que fluyen paralelos a la costa.

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“…Net transport is predominantly north over the northern two-thirds of the island (into the St Helena Sound bight) and southerly along the southern portion of the oceanfront (Zarillo et al 1981). Rapid erosion has led to eight nourishment events since 1968 which feed the ends of Hunting Island and shift sand into the adjacent inlets (Kana et al 2013). At Fripp Inlet, new sand is transported seaward to the ebb-tidal delta.…”

Section: Related Eventsmentioning

confidence: 99%

SCALES & SIGNATURES OF EPISODIC SAND BYPASSING AT A TIDE-DOMINATED INLET — FRIPP INLET, SOUTH CAROLINA

Kana¹,

Traynum²,

Kaczkowski³

2014

Int. Conf. Coastal. Eng.

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This paper provides a case example of meso-scale sand circulation and volumes in a tide-dominated inlet (Fripp Inlet, South Carolina, USA) and the adjacent barrier island. Episodic bypassing is the dominant process controlling shoreline change in this area (Gaudiano & Kana 2001). The scale of bypassing in this case has proven to be more than adequate to restore a highly eroding armored beach along Fripp Island. Upward of 2.7 million cubic meters (m³) shifted from the ebb-tidal delta of Fripp Inlet to a central oceanfront area of Fripp Island between 1989 and 2012. This volume, representing roughly 10 percent of the ebb-tidal delta volume, provided natural nourishment equivalent to nearly 600 cubic meters per meter of shoreline (m³/m) along the nearly 5-kilometer (km) long barrier island. The volume density varied greatly with some beach segments widening by more than 500 m. Prior to the bypassing events, there was no beach at high tide along most of the island. The paper discusses the possible trigger for recent bypassing events and documents changes in Fripp Inlet. Channel rotation into a seawall, southerly deflection of the ebb-delta centroid, and large inputs of sand from the adjacent barrier island appear to have produced conditions promoting large releases of sand to Fripp Island. While the influx of sand has restored much of the oceanfront, full restoration of a sandy beach along the inlet margin will require a channel avulsion or realignment such that the principal erosion-causing process-ebb jet in the main channel-no longer encroaches on the seawall. A channel realignment plan developed by the authors will require upward of 1.2 million m³ of dredging under present conditions but possibly less volume in the near future because of the formation of an incipient new channel.

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The Physical Condition of South Carolina Beaches 1980–2010

Cited by 8 publications

References 20 publications

Tidal and Storm Impacts on Hydrodynamics and Sediment Dynamics in an Energetic Ebb Tidal Delta

Tidal and Storm Impacts on Hydrodynamics and Sediment Dynamics in an Energetic Ebb Tidal Delta

Cambios morfodinámicos de las playas condicionadas por la fluctuación holocena del nivel del mar: Playas mesomareales del Norte de la Patagonia

SCALES & SIGNATURES OF EPISODIC SAND BYPASSING AT A TIDE-DOMINATED INLET — FRIPP INLET, SOUTH CAROLINA

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