Observing and estimating of intensive triad interaction occurrence in very shallow water

Mahmoudof, Seyed Masoud; Badiei, Peyman; Siadatmousavi, Seyed Mostafa; Chegini, Vahid

doi:10.1016/j.csr.2016.04.003

Cited by 12 publications

(4 citation statements)

References 19 publications

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“…The incident and reflected wave parameters (zeroth moment of the wave spectrum m 0 , wave height H m0 , and wave period T m−1,0 ) are determined by reflection analysis according to Mansard and Funke (1980). As the peaks of the generated wave spectra are shifted in shallow water by spectral transformation (Mahmoudof et al 2016;Ardani and Kaihatu 2019), the wave heights and periods were analyzed applying the fast Fourier transform (FFT) technique and the following equations:…”

Section: Nominalmentioning

confidence: 99%

Ecohydraulics of Surrogate Salt Marshes for Coastal Protection: Wave–Vegetation Interaction and Related Hydrodynamics on Vegetated Foreshores at Sea Dikes

Keimer

Schürenkamp

Miescke

et al. 2021

J. Waterway, Port, Coastal, Ocean Eng.

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Vegetation on foreshores in close vicinity to sea dikes may prove beneficial as regulating ecosystem service in the context of coastal defense, dike safety, and flood protection by reducing loads on these defense structures. Predominantly, a decrease in wave heights and bottom shear stresses is hypothesized, which calls for an inclusion in design procedures of coastal defense structures. In contrast to heterogeneous and variable salt marsh vegetation, this study uses surrogate vegetation models for systematic hydraulic experiments in a wave flume, without modeling specific plant species a priori. Froude-scale experiments are performed in order to investigate the effect of salt marsh vegetation on the wave transformation processes on the foreshore and wave run-up at sea dikes. The effect of plant and wave properties on wave transmission, energy dissipation, and wave run-up at a 1:6 sloped smooth dike are presented and discussed, focusing on the wave-vegetation-structure interaction. Vegetated foreshores can contribute to wave attenuation, where an increasing relative vegetation height h v /h results in decreased wave run-up on the dike by up to 16.5% at h v /h = 1.0.

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Section: Nominalmentioning

confidence: 99%

Ecohydraulics of Surrogate Salt Marshes for Coastal Protection: Wave–Vegetation Interaction and Related Hydrodynamics on Vegetated Foreshores at Sea Dikes

Keimer

Schürenkamp

Miescke

et al. 2021

J. Waterway, Port, Coastal, Ocean Eng.

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show abstract

“…(Armstrong et al, 1962) . (Hasselmann et al, 1963) : (Mahmoudof, et al, 2016;Young and Eldeberky 1998;Elgar and Guza, 1985…”

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confidence: 99%

Determination of Compound and Overtide Constituents near the Eastern Iranian Coast of Makran

Mahmoudof

Bagheri

2019

joc

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“…95% , B( f m , f n ) and b 2 ( f m , f n ) are considered statistically reliable (see, e.g., in [50,51,57,91]). To see what the effect of the bicoherence confidence interval is, Equations ( 15) and ( 18) are additionally applied with and without discarding bispectral estimates with b 2 < b 2 95% (solid vs dashed lines in Figure A1).…”

Section: Appendix A2 Formulations and Degrees Of Freedommentioning

confidence: 99%

The Relationship between Sea-Swell Bound Wave Height and Wave Shape

Wit

Tissier

Reniers

2020

JMSE

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The nonlinear wave shape, expressed by skewness and asymmetry, can be calculated from surface elevation or pressure time series using bispectral analysis. Here, it is shown that the same analysis technique can be used to calculate the bound superharmonic wave height. Using measured near-bed pressures from three different field experiments, it is demonstrated that there is a clear relationship between this bound wave height and the nonlinear wave shape, independent of the measurement time and location. This implies that knowledge on the spatially varying bound wave height can be used to improve wave shape-induced sediment transport predictions. Given the frequency-directional sea-swell wave spectrum, the bound wave height can be predicted using second order wave theory. This paper shows that in relatively deep water, where conditions are not too nonlinear, this theory can accurately predict the bispectrally estimated bound superharmonic wave height. However, in relatively shallow water, the mismatch between observed and predicted bound wave height increases significantly due to wave breaking, strong currents, and increased wave nonlinearity. These processes are often included in phase-averaged wind-wave models that predict the evolution of the frequency-directional spectrum over variable bathymetry through source terms in a wave action balance, including the transfer of energy to bound super harmonics. The possibility to calculate and compare with the observed bound super harmonic wave height opens the door to improved model predictions of the bound wave height, nonlinear wave shape and associated sediment transport in large-scale morphodynamic models at low additional computational cost.

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Observing and estimating of intensive triad interaction occurrence in very shallow water

Cited by 12 publications

References 19 publications

Ecohydraulics of Surrogate Salt Marshes for Coastal Protection: Wave–Vegetation Interaction and Related Hydrodynamics on Vegetated Foreshores at Sea Dikes

Ecohydraulics of Surrogate Salt Marshes for Coastal Protection: Wave–Vegetation Interaction and Related Hydrodynamics on Vegetated Foreshores at Sea Dikes

Determination of Compound and Overtide Constituents near the Eastern Iranian Coast of Makran

The Relationship between Sea-Swell Bound Wave Height and Wave Shape

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