Large-scale experiments on wave propagation over <i>Posidonia oceanica</i>

Stratigaki, Vicky; Manca, Eleonora; Prinos, P.; Losada, Íñigo J.; Lara, Javier L.; Sclavo, Mauro; Amos, Carl L.; Caceres, Ivàn; Sánchez‐Arcilla, Agustín

doi:10.1080/00221686.2011.583388

Cited by 114 publications

(69 citation statements)

References 24 publications

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“…The same values to those considered during the experiments are tested: 1.8 and 2.4 m of water depth and meadow density of 180 and 360 mimics/m 2 . The height and the plant characteristics are the same as the ones used in Stratigaki et al (2011) experiments. The wave flume considered in the simulations is the same as the one used for the model validation.…”

Section: Numerical Simulationsmentioning

confidence: 99%

“…The vegetation effect in the flow is validated using Stratigaki et al (2011) experiments. This effect is introduced considering the drag force presented in equation (1) Vegetation mimics were composed of two 45cm long PVC strips and another pair of 27.5cm length, all inserted in a stiff 10cm long rod of the same material.…”

Section: Numerical Implementation Equationsmentioning

confidence: 99%

“…Therefore, velocity measurements taken from Stratigaki et al (2011) experiments are compared with the obtained numerical results. In order to analyze velocity changes along the vertical direction, velocity profiles are compared.…”

Section: Numerical Implementation Equationsmentioning

confidence: 99%

“…The use of a NS model called IH-2VOF is used first to minimize the number of predefined assumptions for wave propagation and the non-linear interactions between waves and plants and second to explore the possibility to improve existing turbulence models to consider wave interaction with vegetation. The IH2-VOF model has been validated using large scale experiments developed by Stratigaki et al (2011). The model has shown a high degree of accordance between the lab data and the numerical predictions in free surface evolution.…”

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confidence: 99%

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Wave Attenuation Modelling by Submerged Vegetation: Ecological and Engineering Analysis

Maza

Lara

Ondiviela

et al. 2012

Int. Conf. Coastal. Eng.

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The correct address of wave characteristics in the vicinity of submerged vegetation is crucial to perform an ecological analysis. Although several attempts have been done in the past using an analytical approach or depth averaged models, the rigidity of the assumptions used to solve the physics produced limited application to real cases. The use of a NS model called IH-2VOF is used first to minimize the number of predefined assumptions for wave propagation and the non-linear interactions between waves and plants and second to explore the possibility to improve existing turbulence models to consider wave interaction with vegetation. The IH2-VOF model has been validated using large scale experiments developed by Stratigaki et al. (2011). The model has shown a high degree of accordance between the lab data and the numerical predictions in free surface evolution. Numerical predictions of the velocity field have been compared both over and inside the vegetation showing also a high degree of accordance. Drag coefficients obtained during the model calibration are in accordance with previous studies such as Mendez et al. (1999). The influence of wave height, wave period, water depth and patch density have been studied using additional numerical simulations with irregular waves. Both the wave period and the water depth have been revealed as the most important parameters in the modification of the flow patterns around the patch.

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Section: Numerical Simulationsmentioning

confidence: 99%

Section: Numerical Implementation Equationsmentioning

confidence: 99%

Section: Numerical Implementation Equationsmentioning

confidence: 99%

mentioning

confidence: 99%

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Wave Attenuation Modelling by Submerged Vegetation: Ecological and Engineering Analysis

Maza

Lara

Ondiviela

et al. 2012

Int. Conf. Coastal. Eng.

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“…Because of its influence on coastal inundation, beach erosion and the ecological health of coastal waters, the interaction of vegetation and storm waves or tsunamis have also received increasing attention. For example, wave flume simulation of kelps, seagrasses, and coastal trees have been conducted by [1,3,6,7,23,29,33,34,38,40,42], among others. Mathematical models starting from macro-scale (wavelength-scale) equations have been proposed by many (e.g., [5,16,22,17] etc.).…”

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confidence: 99%

Waves of intermediate length through an array of vertical cylinders

2013

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We report a semi-analytical theory of wave propagation through a vegetated water. Our aim is to construct a mathematical model for waves propagating through a lattice-like array of vertical cylinders, where the macro-scale variation of waves is derived from the dynamics in the micro-scale cells. Assuming infinitesimal waves, periodic lattice configuration, and strong contrast between the lattice spacing and the typical wavelength, the perturbation theory of homogenization (multiple scales) is used to derive the effective equations governing the macro-scale wave dynamics. The constitutive coefficients are computed from the solution of micro-scale boundary-value problem for a finite number of unit cells. Eddy viscosity in a unit cell is determined by balancing the time-averaged rate of dissipation and the rate of work done by wave force on the forest at a finite number of macro stations. While the spirit is similar to RANS scheme, less computational effort is needed. Using one fitting parameter, the theory is used to simulate three existing experiments with encouraging results. Limitations of the present theory are also pointed out.

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Modeling the effect of wave‐vegetation interaction on wave setup

et al. 2016

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Aquatic vegetation in the coastal zone attenuates wave energy and reduces the risk of coastal hazards, e.g., flooding. Besides the attenuation of sea‐swell waves, vegetation may also affect infragravity‐band (IG) waves and wave setup. To date, knowledge on the effect of vegetation on IG waves and wave setup is lacking, while they are potentially important parameters for coastal risk assessment. In this study, the storm impact model XBeach is extended with formulations for attenuation of sea‐swell and IG waves, and wave setup effects in two modes: the sea‐swell wave phase‐resolving (nonhydrostatic) and the phase‐averaged (surfbeat) mode. In surfbeat mode, a wave shape model is implemented to capture the effect of nonlinear wave‐vegetation interaction processes on wave setup. Both modeling modes are verified using data from two flume experiments with mimic vegetation and show good skill in computing the sea‐swell and IG wave transformation, and wave setup. In surfbeat mode, the wave setup prediction greatly improves when using the wave shape model, while in nonhydrostatic mode (nonlinear) intrawave effects are directly accounted for. Subsequently, the model is used for a range of coastal geomorphological configurations by varying bed slope and vegetation extent. The results indicate that the effect of wave‐vegetation interaction on wave setup may be relevant for a range of typical coastal geomorphological configurations (e.g., relatively steep to gentle slope coasts fronted by vegetation).

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Large-scale experiments on wave propagation over Posidonia oceanica

Cited by 114 publications

References 24 publications

Wave Attenuation Modelling by Submerged Vegetation: Ecological and Engineering Analysis

Wave Attenuation Modelling by Submerged Vegetation: Ecological and Engineering Analysis

Waves of intermediate length through an array of vertical cylinders

Modeling the effect of wave‐vegetation interaction on wave setup

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