Simplified Model for Oscillatory Flow-Submerged Canopy Interaction

Cáceres-Euse, Alejandro; Variano, Evan; Toro-Botero, F. M.; Gómez-Giraldo, Andrés; Osorio, Andrés F.

doi:10.1061/(asce)hy.1943-7900.0001807

Cited by 4 publications

(4 citation statements)

References 38 publications

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“…From the three components of the collected velocity data (u, v, and w were relative to the X, Y, and Z axis, respectively), the analysis will focus on the u horizontal component presenting the velocities along the wave flume, representing the cross-shore velocity component on a beach. The u velocity can be broken down into three parts using the phase average technique (Equation ( 1)), like [55][56][57][58].…”

Section: Discussionmentioning

confidence: 99%

Study of Velocity Changes Induced by Posidonia oceanica Surrogate and Sediment Transport Implications

Astudillo-Gutierrez,

Rabionet,

Garcia

et al. 2024

JMSE

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An analysis of the interactions between wave-induced velocities and seagrass meadows has been conducted based on the large-scale CIEM wave flume data. Incident irregular wave trains act on an initial 1:15 sand beach profile with measurement stations from the offshore of a surrogate meadow until the outer breaking zone, after crossing the seagrass meadow. The analysis considers variability and peaks of velocities, together with their skewness and asymmetry, to determine the effects of the seagrass meadow on the near bed sediment transport. Velocity variability was characterized by the standard deviation, and the greatest changes were found in the area right behind the meadow. In this zone, the negative peak velocities decreased by up to 20.3%, and the positive peak velocities increased by up to 11.7%. For more onshore positions, the negative and positive peak velocities similarly decreased and increased in most of the studied stations. A progressive increase in skewness as the waves passed through the meadow, together with a slight decrease in asymmetry, was observed and associated with the meadow effect. Moving shoreward along the profile, the values of skewness and asymmetry increased progressively relative to the position of the main sandbar. The megaripple-like bedforms appeared earlier when the meadow was present due to the higher skewness, showing a belated development in the layout without the meadow, when skewness increased further offshore due to the proximity of the breaker sandbar. To assess the sediment transport capacity of a submerged meadow, the SANTOSS formula was applied, showing that in front of the meadow, there was a higher sediment transport capacity, whereas behind the meadow, that capacity could be reduced by up to 41.3%. In addition, this formula was able to produce a suitable estimate of sediment transport across the profile, although it could not properly estimate the sediment volumes associated with the bedforms generated in the profile.

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Section: Discussionmentioning

confidence: 99%

Study of Velocity Changes Induced by Posidonia oceanica Surrogate and Sediment Transport Implications

Astudillo-Gutierrez,

Rabionet,

Garcia

et al. 2024

JMSE

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“…In this section, a 1D model for wave-induced steady currents shoreward is going to be presented. Following Cáceres-Euse et al (2020), the model assumptions are summarized as:…”

Section: Development Of the Analytical Model 21 Scaling The Momentum ...mentioning

confidence: 99%

“…where δ ≈ 0.2A w being A w the horizontal wave orbital excursion and δ is the shear layer thickness (Cáceres-Euse et al, 2020). A w = U ∞ T /(2π) and U ∞ comes from the linear wave theory.…”

Section: Analytical Solution and Parameterizationmentioning

confidence: 99%

Wave-induced steady currents by submerged canopy-oscillatory flow interaction

Caceres¹,

Orfila²,

Maza³

et al. 2021

Preprint

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A new analytical model is presented in order to better understand the depth-dependent wave-induced steady current caused by submerged aquatic canopy-oscillatory flow interaction. The analytical model takes into account the wave and canopy properties. The model is developed by determining the dominant terms in the momentum equation by means of dimensional analysis and satisfying the mass conservation. The dimensional analysis reveals that the pressure gradient (due to wave decay) is of the same order of magnitude as the drag force, wave stress and Reynolds stress terms. In addition, the balance between the pressure gradient and mass conservation induces a seaward current above the canopy, and the presence of the pressure gradient in the momentum equation contributes to intensify the skimming flow at the top of the canopy. Finally, given that the model follows a polynomial function it can be easily implemented in large scale models such as phase average models.

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“…to estimate the so-called bulk drag coefficient C D [6,7]. The implications of the interaction between flow and vegetation in vegetated water bodies on their main fluid dynamic features have been largely investigated in many experimental and numerical analyses by schematizing riparian plants as naturallike elements [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Bulk Drag Predictions of Riparian Arundo donax Stands through UAV-Acquired Multispectral Images

Lama

Crimaldi

Pasquino

et al. 2021

Water

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Estimating the main hydrodynamic features of real vegetated water bodies is crucial to assure a balance between their hydraulic conveyance and environmental quality. Riparian vegetation stands have a high impact on vegetated channels. The present work has the aim to integrate riparian vegetation’s reflectance indices and hydrodynamics of real vegetated water flows to assess the impact of riparian vegetation morphometry on bulk drag coefficients distribution along an abandoned vegetated drainage channel fully covered by 9–10 m high Arundo donax (commonly known as giant reed) stands, starting from flow average velocities measurements at 30 cross-sections identified along the channel. A map of riparian vegetation cover was obtained through digital processing of Unnamed Aerial Vehicle (UAV)-acquired multispectral images, which represent a fast way to observe riparian plants’ traits in hardly accessible areas such as vegetated water bodies in natural conditions. In this study, the portion of riparian plants effectively interacting with flow was expressed in terms of ground-based Leaf Area Index measurements (LAI), which easily related to UAV-based Normalized Difference Vegetation Index (NDVI). The comparative analysis between Arundo donax stands NDVI and LAI map enabled the analysis of the impact of UAV-acquired multispectral imagery on bulk drag predictions along the vegetated drainage channel.

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Simplified Model for Oscillatory Flow-Submerged Canopy Interaction

Cited by 4 publications

References 38 publications

Study of Velocity Changes Induced by Posidonia oceanica Surrogate and Sediment Transport Implications

Study of Velocity Changes Induced by Posidonia oceanica Surrogate and Sediment Transport Implications

Wave-induced steady currents by submerged canopy-oscillatory flow interaction

Bulk Drag Predictions of Riparian Arundo donax Stands through UAV-Acquired Multispectral Images

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