A winter storm in Alderney Race: Impacts of 3D wave–current interactions on the hydrodynamic and tidal stream energy

Bennis, Anne-Claire; Furgerot, Lucille; Bois, Pascal Bailly du; Poizot, Emmanuel; Méar, Yann; Dumas, Franck

doi:10.1016/j.apor.2021.103009

Cited by 11 publications

(9 citation statements)

References 33 publications

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“…Other physical parameterization schemes of the wave model as well as the corresponding parameter value settings will be tested to optimize the wave simulation in the Changjiang River Estuary and its adjacent coastal areas. In addition, the incorporation of temperature, salinity fields and large-scale estuarine currents will allow for a more comprehensive analysis of wave-tide interactions and their effects on the hydrodynamic environment [78]. These efforts will contribute to improving the accuracy of hindcasting and forecasting in the model.…”

Section: Discussionmentioning

confidence: 99%

Wave–Tide Interaction by Typhoon Ampil on Wave and Storm Surge in the Changjiang River Estuary and Its Adjacent Coastal Areas

Zhang,

Ji,

Xie

et al. 2023

JMSE

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The study used the SCHISM ocean model combined with the WWM III wind wave model to quantify the interaction between wind waves and tides in the coastal zone of the Changjiang River Estuary and its adjacent areas. The wave and storm surge during Typhoon Ampil, which made landfall in July 2018 in Shanghai, were simulated by using the Climate Forecast System Version 2 (CFSv2) and Medium-Range Weather Forecasts (ECMWF) latest reanalysis (ERA5) wind dataset from 1 July to 31 July. Model results with CFSv2 forcing show better performance in terms of significant wave height and storm surge than those with ERA5 forcing. To investigate the interactions between waves, water levels, currents, and their combined effects on significant wave and surge variations, six numerical sensitivity experiments were designed according to the different coupling methods between SCHISM and WWMIII. The research shows that in coastal areas with water depths of less than 10 m, waves are affected by water levels and currents. The differences in the effect on significant wave height between wave-tide coupling and one-way coupling with water levels and currents are negligible. Wave setup is an important physical term which cannot be ignored during the variations of storm surge caused by Typhoon Ampil. The contributions of wave set up were concentrated in coastal areas with water depths less than 10 m. The peak wave setup occurred in the Changjiang River Estuary, reaching 0.15 m. In Xiangshan Bay and Sanmen Bay, wave radiation stress makes the proportion of wave setup to the total surge reached more than 30%. The consideration of wave-tide interaction can effectively improve the accuracy of numerical wave and storm surge simulations, which can provide more accurate hindcasts of wave and storm surge variations in the Changjiang River Estuary and its adjacent coastal areas.

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Section: Discussionmentioning

confidence: 99%

Wave–Tide Interaction by Typhoon Ampil on Wave and Storm Surge in the Changjiang River Estuary and Its Adjacent Coastal Areas

Zhang,

Ji,

Xie

et al. 2023

JMSE

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“…( 9)) due to the weak value of the near-bottom flow velocity ( 20 cm/s). This reduces the flow intensity across the entire water column, as described by Bennis et al (2020Bennis et al ( , 2022. In the case of winds blowing in the same direction of tidal currents (bottom-right panel D), winds and waves affect only slightly the tidal logarithmic profile, leading to less significant differences.…”

Section: Assessment Of Vertical Current Profiles For Contrasting Eventsmentioning

confidence: 99%

“…Discussion started: 26 June 2023 c Author(s) 2023. CC BY 4.0 License.according to a similar procedure than inPianezze et al (2018);Bennis et al (2020Bennis et al ( , 2022. In CROCO v1.1, WAVEWATCH-III provides only three mean wave parameters based on the integration of the wave spectrum (Fig.2left panel, blue labels): the significant wave height (𝐻 𝑆 ), the mean wave period (𝑇 0𝑀1 ), and the mean wave direction (𝜃 𝑤 ), which are used by CROCO to compute wave-induced terms in the hydrodynamic equations, including wave-averaged set-up/set-down, horizontal and vertical vortex force, wave-induced pressure, wave-induced tracer diffusivity, non-conservative wave dissipation, non-conservative wave accelerations for currents and wave-enhanced vertical mixing (Eq.…”

mentioning

confidence: 99%

Implementation of additional spectral wave field exchanges in a 3D wave-current coupled WAVEWATCH-III (version 6.07) – CROCO (version 1.2) configuration and assessment of their implications for macro-tidal coastal hydrodynamics

Porcile

Bennis

Boutet

et al. 2023

Preprint

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Abstract. An advanced coupling between a three-dimensional ocean circulation model (CROCO) and a spectral wave model (WAVEWATCH-III) is presented to better represent wave-current interactions in coastal areas. In the previous implementation of the coupled interface between these two models, some of the wave-induced terms in the ocean dynamic equations were computed from their monochromatic approximations (e.g., Stokes drift, Bernoulli head, near-bottom wave orbital velocity, wave-to-ocean energy flux). In the present study the exchanges of these fields computed from the spectral wave model are implemented and evaluated. A set of numerical experiments for a coastal configuration of the circulation near the Bay of Somme (France) is designed. The impact of the spectral versus monochromatic computation of wave-induced terms significantly affects the hydrodynamics at coastal scale in the case of storm waves and winds opposed to tidal flows, reducing the wave-induced deceleration of the vertical profile of tidal currents. This new implementation provides current magnitudes closer to measurements than those predicted using their monochromatic formulations, particularly at the free surface. The spectral surface Stokes drift and the near-bottom wave orbital velocity are found to be the most impacting spectral fields, respectively increasing advection towards the free surface and shifting the profile close to the seabed. In the particular case of the Bay of Somme, the approximation of these spectral terms with their monochromatic counterparts ultimately results in an underestimation of ocean surface currents. Our model developments thus provide a better description of the competing effects of tides, winds, and waves on the circulation of coastal seas with implications to the study of air-sea interactions and sediment transport processes.

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“…Sea sites identified for potential tidal turbine installations are characterised by complex current conditions including high velocity magnitudes, sheared velocity profiles, turbulent flows, and directional variability [2][3][4]. Over that complexity, the presence of surface waves induces velocity fluctuation in the water column that affects the tidal kinetic energy resource [5,6] and causes unsteady loads on the tidal turbines. Indeed, numerical models, such as the one presented in Perez et al [7], find that when HATTs operate in large wave conditions at sea, the load cycle is governed by the periodic wave-induced velocity fluctuation while the average power and thrust are barely affected by the presence of waves.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Surface Waves Effect on a Ducted Twin Vertical Axis Tidal Turbine

Moreau,

Germain,

Maurice

2023

JMSE

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The cost effective design of tidal turbines requires a good estimation of the loading cycles and their extrema that are related to the unsteady fluctuation of the current velocity. Apart from the ambient turbulence, the main source of velocity fluctuation is the presence of surface waves. In the present study, we analyse the effect of waves propagating against the current on the performance and the loads of a twin vertical axis tidal turbine by an experimental approach at a 1/20 scale. Overall, the results show little or no effect of the waves on the average power and loads compared to the conditions with current only, but a significant impact on their standard deviation that rises linearly with the amplitude of the waves. The drag, lift, and pitching moment show extended ranges up to 7.5 times higher and extreme values exceedance by 60 to 100% with irregular waves compared to the conditions without waves. That load and power fluctuation increase is totally due to the presence of waves as the coherence function between the rotor torque or the loads and the velocity spectra exceed 0.5 on the whole wave frequency bandwidth. The results also reveal a rotational sampling of the waves by the rotors that had also been observed on horizontal axis turbines. From a structural design point of view, the authors recommend conducting tests in irregular wave conditions as both the load ranges and extreme values are 1.5 to 2 times higher than those encountered with regular waves of the same significant height and period.

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A winter storm in Alderney Race: Impacts of 3D wave–current interactions on the hydrodynamic and tidal stream energy

Cited by 11 publications

References 33 publications

Wave–Tide Interaction by Typhoon Ampil on Wave and Storm Surge in the Changjiang River Estuary and Its Adjacent Coastal Areas

Wave–Tide Interaction by Typhoon Ampil on Wave and Storm Surge in the Changjiang River Estuary and Its Adjacent Coastal Areas

Implementation of additional spectral wave field exchanges in a 3D wave-current coupled WAVEWATCH-III (version 6.07) – CROCO (version 1.2) configuration and assessment of their implications for macro-tidal coastal hydrodynamics

Experimental Investigation of Surface Waves Effect on a Ducted Twin Vertical Axis Tidal Turbine

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