Bragg Reflection Breakwater: A New Shore Protection Method?

Bailard, James A.; DeVries, Jack W.; Kirby, James T.; Guza, R. T.

doi:10.1061/9780872627765.129

Cited by 11 publications

(9 citation statements)

References 2 publications

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“…Their numerical results reveal that the bandwidths of primary and higherorder harmonic resonances are narrow. Therefore, Bailard et al (1992) determined that the application of a Bragg breakwater might be practically limited on most US beaches. Hsu et al (2002) studied the effect of the shape of artificial breakwaters on the Bragg reflection in practical cases.…”

Section: Introductionmentioning

confidence: 99%

“…The mechanisms of resonant Bragg reflection and the non-resonant reflection of water waves are examined by several theoretical analyses and numerical simulations (Heathershaw, 1982;Davies, 1982;Davies and Heathershaw, 1984;Mei, 1985;Kirby, 1986;Dalrymple and Kirby, 1986;Hara and Mei, 1987;Mattioli, 1991). Bailard et al (1992) used a staggered nine-element bar field to reduce the volume erosion by 25% along beaches on the US Gulf coast and the Atlantic coast. Their numerical results reveal that the bandwidths of primary and higherorder harmonic resonances are narrow.…”

Section: Introductionmentioning

confidence: 99%

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Long wave reflection from submerged trapezoidal breakwaters

Chang

Liou

2007

Ocean Engineering

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Long wave reflection from submerged trapezoidal breakwaters

Chang

Liou

2007

Ocean Engineering

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“…Their results indicated that the potential effectiveness of these bars against wave attack seems to be satisfactory. Bailard et al [1990] considered the artificial bars placed offshore on a natural beach. They concluded that the Bragg reflection caused by these bars might have merits as an appropriate shore protection method when compared with conventional countermeasures such as seawalls, jetties, and detached breakwaters in the aspect of harmonics with coastal environment.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Multiply Composite Artificial Bars for Bragg Scattering of Water Waves

Tsai

Kuo

Lan

et al. 2011

Coastal Engineering Journal

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The Bragg scattering of water waves by multiply composite artificial bars was investigated both theoretically and experimentally. Miles' theory is first employed to derive general formulae to calculate Bragg reflection coefficients for multiply composite artificial bars with different shapes, spacings, bar heights, bar footprint, and the number of bars. The theory provides explicit expressions in estimating Bragg reflections over multiply composite bars in practical engineering applications. The undulating oscillation components expanded with respect to the bottom slope and curvature components in the numerical model can increase the accuracy for the simulation of Bragg scattering. Experiments of Bragg reflection over multiply rectangular artificial bars were also conducted in a wave flume. Analytical solutions are in good agreement with numerical simulations of evolution equation of mild-slope equation (EEMSE) and laboratory experiments. Influence parameters that may lead to the optimal combination of a multiple artificial bar to increase the bandwidth of Bragg resonance were studied.

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“…For Bragg reflection to be a useful shore-protection method, a bar field must be relatively simple to construct, it must produce a significant degree of erosion protection, and it must be adaptable to a wide range of wave and beach conditions. Bailard et al (1990) addressed elements of the first issue. This paper addresses elements of the second and third issues via application of two numerical beach-profile response models and a numerical wave-reflection model.…”

Section: Introductionmentioning

confidence: 99%

Considerations in Using Bragg Reflection for Storm Erosion Protection

Bailard¹,

DeVries²,

Kirby

1992

J. Waterway, Port, Coastal, Ocean Eng.

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It has been suggested that Bragg reflection, the combined coherent wave reflection from a few low-lying shore-parallel bars, might be used to protect a beach against storm-wave attack. Numerical models are used to examine two issues relating to the feasibility of this concept: the degree of erosion protection provided by reflecting a portion of the incident wave energy, and the degree of wave reflection that can be generated by a bar field of varying geometry. The results show that a Bragg-reflection bar field must reflect about one-quarter of the incident wave energy to provide a significant measure of storm erosion protection. Bar fields with uniform spacing are capable of producing the required magnitude of wave reflection, but lack sufficient bandwidth. Bandwidth can be increased by staggering the spacings between bars, however, this produces a concurrent decrease in wave-reflection magnitude. Bragg-reflection bar fields appear capable of providing a limited measure of storm erosion protection along U.S. Gulf Coast and Atlantic Coast beaches, but their bandwidth may be too limited for use along Pacific Coast beaches.

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Bragg Reflection Breakwater: A New Shore Protection Method?

Cited by 11 publications

References 2 publications

Long wave reflection from submerged trapezoidal breakwaters

Long wave reflection from submerged trapezoidal breakwaters

Investigation of Multiply Composite Artificial Bars for Bragg Scattering of Water Waves

Considerations in Using Bragg Reflection for Storm Erosion Protection

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