The Longshore Transport Enigma and Analysis of a 10-Year Record of Wind-Driven Nearshore Currents

Burnette, Carolina; Dally, William R.

doi:10.2112/jcoastres-d-17-00010.1

Cited by 4 publications

(6 citation statements)

References 13 publications

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“…They found that during intense sea breeze events the alongshore currents significantly increase inside the surf and swash zones. Therefore, in the present case of a coast subjected to sea breeze conditions, the highly oblique winds (see Figure 2a) play a major role in driving longshore currents and consequently longshore transport [28][29][30]. Torres-Freyermuth et al [22] conducted a field experiment to characterize the nearshore circulation during both intense local sea breeze events and synoptic Norte events.…”

Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

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Field and Numerical Study of Resistance and Resilience on a Sea Breeze Dominated Beach in Yucatan (Mexico)

Medellín

Torres-Freyermuth

Tomasicchio

et al. 2018

Water

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The understanding of the beach capability to resist and recover from a disturbance is of paramount importance in coastal engineering. However, few efforts have been devoted to quantifying beach resilience. The present work aims to investigate the shoreline resistance and resilience, associated to a transient disturbance, on a sandy beach. A temporary groin was deployed for 24 h on a micro-tidal sea-breeze dominated beach to induce a shoreline perturbation. Morphological changes were measured by means of beach surveys to estimate the beach perturbation and the further beach recovery after structure removal. An Empirical Orthogonal Function (EOF) analysis of the shoreline position suggests that the first EOF mode describes the spatial-temporal evolution of the shoreline owing to the groin deployment/removal. A new one-line numerical model of beach evolution is calibrated with the field surveys, reproducing both the sediment impoundment and subsequent beach recovery after the structure removal. Thus, a parametric numerical study is conducted to quantify resistance and resilience. Numerical results suggest that beach resistance associated to the presence of a structure decreases with increasing alongshore sediment transport potential, whereas resilience after structure removal is positively correlated with the alongshore diffusivity.

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Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Field and Numerical Study of Resistance and Resilience on a Sea Breeze Dominated Beach in Yucatan (Mexico)

Medellín

Torres-Freyermuth

Tomasicchio

et al. 2018

Water

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“…However, wind stress may be more important for nearshore transport during wet weather or in other regions. For example, in Melbourne Beach, FL, where hurricanes are common, the correlation of wind stress with waves explained net sediment transport better than waves alone …”

Section: Resultsmentioning

confidence: 99%

“…waves explained net sediment transport better than waves alone. 50 Applications for Beach Management. Here tracer was modeled on norovirus because quantitative microbial risk assessment has found norovirus to be the greatest contributor to GI illness likelihood in marine swimmers, 51,52 but EPA guidelines use cultured Enterococcus as the basis for beach advisories for marine waters.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Performance of a One-Dimensional Model of Wave-Driven Nearshore Alongshore Tracer Transport and Decay with Applications for Dry Weather Coastal Pollution

Brasseale,

Feddersen,

et al. 2023

Environ. Sci. Technol.

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Dry weather pollution sources cause coastal water quality problems that are not accounted for in existing beach advisory metrics. A 1D wave-driven advection and loss model was developed for a 30 km nearshore domain spanning the United States/Mexico border region. Bathymetric nonuniformities, such as the inlet and shoal near the Tijuana River estuary mouth, were neglected. Nearshore alongshore velocities were estimated by using wave properties at an offshore location. The 1D model was evaluated using the hourly output of a 3D regional hydrodynamic model. The 1D model had high skill in reproducing the spatially averaged alongshore velocities from the 3D model. The 1D and 3D models agreed on tracer exceedance or nonexceedance above a human illness probability threshold for 87% of model time steps. 1D model tracer was well-correlated with targeted water samples tested for DNA-based human fecal indicators. This demonstrates that a simple, computationally fast, 1D nearshore wave-driven advection model can reproduce nearshore tracer evolution from a 3D model over a range of wave conditions ignoring bathymetric nonuniformities at this site and may be applicable to other locations.

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“…The wind-driven current takes place in the coastal area of Ie Meulee proved by the same dominant current direction as the wind movements which the speed ranged from 0.1-0.3 m/s. The winddriven current is the main factor in triggering the local transport in the coastal area related to the sediment transport beneath the first breaking-wave crest distributed by longshore current (Burnette and Dally, 2018).…”

Section: Sea Current Patterns In the Ie Meulee Watersmentioning

confidence: 99%

Velocity Components of Currents and Transport Mechanism in the Ie Meulee Waters, Weh Island, Indonesia

Wisha

Wang

2019

J. Kel. Trop.

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Weh Island has become an area of significance in which many developments are ongoing. Ie Meulee region was one of the developed areas where a new fishing port has been built which may impact to coastal instability. This study aims to determine the sea currents regime in the Ie Meulee waters and its relation to the transport mechanism. Field survey was conducted on March 2017 by which Tide Gauge and ADCP have installed within and without the port, respectively. Flow model was also simulated depicting current patterns for four extreme tidal conditions. The elliptical form of zonal and meridional components of current proves that the tidal current role takes place. The speed of tidal current ranged from 0-0.42 m/s and 0-0.85 m/s in the bottom and surface, respectively. The most prominent positive value of current components indicates that the transport mechanism is primarily surface ward during both ebb and flood tides. Reflection and diffraction are identified in the simulation testifying that the emergence of the fishing port has changed the hydrodynamic features. We also founded that the low-speed currents induced sediment settling within the jetty, so that it is essential to conduct regular dredging and bathymetry survey in the surrounding port.

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The Longshore Transport Enigma and Analysis of a 10-Year Record of Wind-Driven Nearshore Currents

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 4 publications

References 13 publications

Field and Numerical Study of Resistance and Resilience on a Sea Breeze Dominated Beach in Yucatan (Mexico)

Field and Numerical Study of Resistance and Resilience on a Sea Breeze Dominated Beach in Yucatan (Mexico)

Performance of a One-Dimensional Model of Wave-Driven Nearshore Alongshore Tracer Transport and Decay with Applications for Dry Weather Coastal Pollution

Velocity Components of Currents and Transport Mechanism in the Ie Meulee Waters, Weh Island, Indonesia

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