Evolution of wave and tide over vegetation region in nearshore waters

Zhang, Mingliang; Zhang, Hongxing; Zhao, Kaili; Tang, Jun; Qin, Huifa

doi:10.1007/s10236-017-1068-x

Cited by 4 publications

(2 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, it is of great significance to study the flow-vegetation interaction for analysing the turbulence structure and material transport from the perspective of protecting the aquatic ecological environment. So far, a large number of studies have been carried out on the macroscopic characteristics of vegetation flow, both experimentally (Ikeda & Kanazawa 1996;Nepf 1999;Wilson et al 2003;Wang & Wang 2010) and numerically (Li & Zhang 2010;Zhang et al 2017;Xiang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Influence of submerged flexible vegetation on turbulence in an open-channel flow

Wang

Dey

et al. 2022

J. Fluid Mech.

View full text Add to dashboard Cite

In this study, we present a three-dimensional numerical model for the interaction of flow with submerged flexible vegetation, based on a large-eddy simulation and the immersed boundary method. The model innovatively realises the interaction between the flow and highly flexible vegetation with clustered leaves. Besides being a three-dimensional model of motion with full degrees of freedom, this study improves the consideration of the motion of the vegetation in all directions, and in addition the energy and momentum transfer in the spanwise direction. Furthermore, we perform a flume experiment for the flow with submerged flexible vegetation, the results of which are used to validate the simulation effects of the numerical model. It is found that the numerical model can effectively simulate the velocity profiles and the movement of vegetation induced by the flow. Using the model to analyse the flow–vegetation interaction, we find that the movement of vegetation is closely related to the flow velocity. As the flow velocity increases, both the offset angle and the vegetation swaying amplitude increase. Compared to vertical rigid vegetation, the tilting of flexible vegetation does not significantly change the velocity difference and the magnitude of the turbulent kinetic energy between the inside and the outside of the vegetation canopy, but it does weaken the disturbance to flow, thus reducing the resistance to flow. However, the swaying of vegetation dose significantly increase the velocity difference between the inside and the outside of the canopy. It forms Kelvin–Helmholtz hairpin vortices intensifying the turbulence production, and enhancing the disturbance and resistance to flow.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of submerged flexible vegetation on turbulence in an open-channel flow

Wang

Dey

et al. 2022

J. Fluid Mech.

View full text Add to dashboard Cite

show abstract

“…Over the past decades, the wave heights have a clear increase trend in extreme conditions, together with accelerated sea level rise [13][14][15][16][17]. Therefore, there is a demand for better understanding and predictive ability of vegetation-wave interaction process to reduce coastal flooding risks [4,[18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Applying a New Force–Velocity Synchronizing Algorithm to Derive Drag Coefficients of Rigid Vegetation in Oscillatory Flows

Yao

Chen

Huang

et al. 2018

Water

View full text Add to dashboard Cite

Coastal vegetation is effective in dissipating incident wave energy during storm conditions, which offers valuable protection to coastal communities. Determining vegetation drag coefficient (C D) is of great importance to the quantification of vegetation-induced wave dissipation. Recently, a direct measuring approach has been developed to derive vegetation drag coefficient more accurately compared to the conventional calibration approach. However, as this approach requires perfectly in-phase force and velocity signals, there are two difficulties associated with it. The first difficulty is the availability of a suitable force sensor to compose synchronized force-velocity measuring systems. The second difficulty is related to realigning the obtained timeseries of force and velocity data. This technical note develops a new synchronized force-velocity measuring system by using standard force sensors and an acoustic doppler velocimeter (ADV). This system is applied together with an automatic realignment algorithm to ensure in-phase data for C D deviation. The algorithm reduces the phase shift between force-velocity signals from ca. 0.26 s to 0.003 s. Both time-varying and period-averaged C D can be obtained using this method. The derived C D can be used to accurately reproduce the measured maximum total acting force on vegetation (R 2 = 0.759), which shows the reliability of the automatic alignment algorithm. The newly-developed synchronized force-velocity measuring system and alignment algorithm are expected to be useful in future experiments on vegetation-wave interactions with various hydrodynamic and vegetation settings.

show abstract

The effects of plant structure and flow properties on the physical response of coastal dune plants to wind and wave run-up

Innocenti

Feagin

Charbonneau

et al. 2021

Estuarine, Coastal and Shelf Science

View full text Add to dashboard Cite

Evolution of wave and tide over vegetation region in nearshore waters

Cited by 4 publications

References 38 publications

Influence of submerged flexible vegetation on turbulence in an open-channel flow

Influence of submerged flexible vegetation on turbulence in an open-channel flow

Applying a New Force–Velocity Synchronizing Algorithm to Derive Drag Coefficients of Rigid Vegetation in Oscillatory Flows

The effects of plant structure and flow properties on the physical response of coastal dune plants to wind and wave run-up

Contact Info

Product

Resources

About