Improved analysis of regular gravity waves and coefficient of reflexion using one or two moving probes

Brossard, J.; Hémon, A; Rivoalen, Elie

doi:10.1016/s0378-3839(99)00060-5

Cited by 28 publications

(11 citation statements)

References 4 publications

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“…” Because the generated harmonic waves are dispersive, the phase speed of components can be used to distinguish whether the components are bound or free. Brossard et al [2000] employed a moving probe technique to distinguish the Doppler‐shifted spectral peaks of bound and free harmonic components on the basis of phase speed. To investigate the phase speed in this study, the interfacial height signal is band‐pass filtered about the frequency of interest to remove higher and lower frequency fluctuations.…”

Section: Resultsmentioning

confidence: 99%

Harmonic generation of interfacial waves at a submerged bathymetric ridge

Hult¹,

Troy²,

Koseff³

2010

J. Geophys. Res.

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[1] When two-layer, periodic, interfacial wave trains pass over a Gaussian ridge, waves of higher harmonic frequency can be excited at the ridge, which then propagate downstream independently of the incident wave. In laboratory experiments, the amount of energy transferred to higher harmonic frequencies increases with the nonlinearity of the main wave over the ridge crest. When the wave nonlinearity is increased to the point where breaking occurs over the ridge, harmonic generation can still occur. The length scale of the obstacle relative to the wavelength can also influence the energy transfer, which is consistent with analogous surface wave studies. The upper limit for which harmonic frequencies can be excited is set by the stratification. This wave-topography interaction provides a possible mechanism for transferring energy in the internal wavefield to smaller scales.

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Section: Resultsmentioning

confidence: 99%

Harmonic generation of interfacial waves at a submerged bathymetric ridge

Hult¹,

Troy²,

Koseff³

2010

J. Geophys. Res.

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“…The method of wave measurements (Brossard et al 2000) allows an accurate measurement of all regular modes propagating in the wave flume. Each mode has its own celerity.…”

Section: Methods Of Wave Measurement In the Flumementioning

confidence: 99%

Coastal chalk cliff erosion: experimental investigation on the role of marine factors

Brossard

Duperret

2004

EGSP

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International audienceIn this paper the marine factors of erosion contributing to the chalk cliffs located on either side of the English Channel are examined. From an analysis of the literature, the main physical phenomena determining the marine erosion of the shore platform and the foot of the cliff are considered. Field observations of the coastal chalk cliff show that the vertical erosion of the shore platform does not appear to be the main cause of cliff erosion, which is mainly governed by cliff collapse processes. To estimate the impact of waves on the base of the cliff, experiments were carried out in a wave flume. The pressure due to the waves and the dissipation of waves were measured for three simple configurations of the boundary conditions between the cliff and the sea. The pressure never exceeded the compressive strength of chalk rock. Nevertheless, pressure fluctuations due to periodic waves can induce a fatigue process within the fracture structures. The experimental results showed that the shingle by itself has a low effect on wave energy dissipation. The main effect of shingle is to reduce the water depth at the toe of the cliff. Furthermore, it is demonstrated that a lower water depth leads to a lower impact of the waves on the cliff

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“…For wind-induced, short-period waves, there are many approaches to determine the reflection coefficients of reflectors. These include techniques to resolve the incident and reflected waves from the records of composite waves from different number of gauges (e.g., Goda and Suzuki [4], Mansard and Funke [5], Baldock and Simmonds [6], Brossard et al [7]). Given that an application of the aforementioned gauge methods on measured data is not reasonable without an extension by the consideration of re-reflection and the consideration of a degree of dissipation, they will be left out in the following discussion.…”

Section: Introductionmentioning

confidence: 99%

Model Based Assessment of the Reflection Behavior of Tidal Waves at Bathymetric Changes in Estuaries

Sohrt

Hein

Nehlsen

et al. 2021

Water

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Estuaries are often modified by human activities. Adjustments in the morphology of an estuary have a potential impact on the hydrodynamics and on the reflection behavior of the tide. The influence of such system changes on the complex tidal regime with a large number of superimposed tidal constituents is not fully understood yet. The reflection properties of estuaries that are characterized by abrupt changes in geometry are systematically investigated on the basis of simplified estuary model approaches to improve the understanding of the oscillation and reflection behavior of tidal waves in estuaries. The reflection coefficients at abrupt cross-sectional changes are determined by two different methods, i.e., an analytical energy-based approach and a hydrodynamic numerical (HN) model. Comparisons indicate a high agreement of the results of the different methods when evaluating the reflection coefficient. The tidal constituents are reflected at partial and total reflectors and amplified by shoaling depending on the water depths, the height of the bottom step and the horizontal constriction. A harmonic analysis of simulated water level data partly shows the formation and amplification of higher harmonic components as a result of shallow water effects. The interaction with reflectors results in an increasing amplification of the tidal constituents and the tide.

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Improved analysis of regular gravity waves and coefficient of reflexion using one or two moving probes

Cited by 28 publications

References 4 publications

Harmonic generation of interfacial waves at a submerged bathymetric ridge

Harmonic generation of interfacial waves at a submerged bathymetric ridge

Coastal chalk cliff erosion: experimental investigation on the role of marine factors

Model Based Assessment of the Reflection Behavior of Tidal Waves at Bathymetric Changes in Estuaries

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