Pollutant Trapping at a Coastal Headland

Chen, Daoyi; Tang, Fu Ee; Chen, Chaoquan

doi:10.1061/(asce)0733-950x(2005)131:3(98)

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…Due to space constraints, only an overview of the experimental set-up will be presented here. The experimental set-up had been presented in Chen (2005). The experiments were conducted in a purposebuilt shallow water flume, with full dimensions 11m × 3.3m × 0.2m.…”

Section: Experimental Methodologymentioning

confidence: 99%

104. POLLUTANT DISPERSION AROUND THE PERIMETER OF A COASTAL HEADLAND

Tang¹

2009

Proceedings of Coastal Dynamics 2009

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The dispersion of point and nonpoint source pollutants may be complicated by the existence of coastal geographical features such as headlands. When coastal flow passes a headland on the coastal line, a recirculation zone will be formed as the flow separates at the headland toe. The experimental investigation was carried out in a purpose-built flume, located at the Manchester Tidal flow Facility (MTF). From the experiments, if pollutant is discharged at different locations around the perimeter of a headland, the potential of pollutant trapping around the headland and its generated recirculation zone will change accordingly. This study investigates the characteristics of pollutant dispersion in the region around the headland perimeter. Effective pollutant dispersion at the recirculation zone will be crucial to maintain the water quality of the region.

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Section: Experimental Methodologymentioning

confidence: 99%

104. POLLUTANT DISPERSION AROUND THE PERIMETER OF A COASTAL HEADLAND

Tang¹

2009

Proceedings of Coastal Dynamics 2009

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“…These vortices can sometimes create spectacular patterns as they chaotically advect a tracer field. More importantly, they lead to stirring of nutrients, biogenic material (Rankin et al 1994), and pollutants (Wolanski et al 1984;Chen et al 2005), providing a pathway to irreversible mixing of coastal waters (Muller and Garrett 2003).…”

Section: Introductionmentioning

confidence: 99%

Tilted Baroclinic Tidal Vortices

Canals

Pawlak

MacCready

2009

Journal of Physical Oceanography

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The structure of baroclinic vortices generated by horizontal flow separation past a sloping headland in deep, stably stratified waters is investigated. The most distinctive feature of these eddies is that their cores are strongly tilted with respect to the stratification, yet their velocity field remains quasi-horizontal. Field observations and numerical simulations are used to explore the consequences of the strong tilt on the eddy baroclinic structure. It is found that the background density field is altered in such a way as to maintain a pressure minimum in the tilted vortex cores. This adjustment results in a fundamental asymmetry of the density field. Isopycnals are deflected upward on the shoreward side and downward on the opposite side of the eddy center. The resulting pattern closely resembles the asymmetries of azimuthal wavenumber one that develop when tropical cyclones become tilted by an environmental shear.The authors provide a simple analytical model that suggests this structure is obtained via a balance between the centrifugal force and the horizontal pressure gradient. As the eddies release from the boundary, adjust, and decay, their tilt as well as the associated density perturbation decrease and lose coherence. It is suggested that this may lead to a conversion of potential energy into kinetic energy.

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Boundary layer structure of oscillatory open-channel shallow flows over smooth and rough beds

Chen

Tang

et al. 2007

Exp Fluids

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Pollutant Trapping at a Coastal Headland

Cited by 5 publications

References 6 publications

104. POLLUTANT DISPERSION AROUND THE PERIMETER OF A COASTAL HEADLAND

104. POLLUTANT DISPERSION AROUND THE PERIMETER OF A COASTAL HEADLAND

Tilted Baroclinic Tidal Vortices

Boundary layer structure of oscillatory open-channel shallow flows over smooth and rough beds

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