Role of Vegetation on Beach Run-up due to Regular and Cnoidal Waves

Noarayanan, L.; Murali, K.; Sundar, V.

doi:10.2112/jcoastres-d-10-00078.1

Cited by 15 publications

(2 citation statements)

References 20 publications

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“…Kutija and Thi Minh Hong (1996) introduced a numerical model for investigating the influence of parameters such as height, density and diameter of rigid-flexible vegetation that contribute to the flow resistance. Noarayanan et al (2012) conducted an experimental study to investigate the performance characteristics of vegetation in attenuating run-up. Two cases of regular and cnoidal waves were propagated over a plane slope of 1:30 in presence and absence of vegetation.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of emergent coastal vegetation as a defence system to mitigate debris load on a structure during extreme event

Gupta

Behera

2023

Preprint

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Recent research has shown the effectiveness of a vegetation patch in reducing the fluid force of a tsunami wave or storm surge. However, according to the author’s knowledge, the research on the loading behaviour of debris such as shipping containers in presence of these coastal defence system does not exist. This paper, therefore, elucidates the behaviour of impact loading on a column structure due to modeled shipping container in presence of rigid staggered vegetation (RSV) and Tilting staggered vegetation (TSV) with relevance to Reduced Fluid Force Index (RFI), Reduced Momentum Index (RMI) and Transmission coefficient (CT). The non-linearities and the free surface of the fluid are dealt with Smoothed Particle Hydrodynamics (SPH) and the dynamics of vegetation tilt are dealt using Differential Variational Inequality (DVI). The experimental study is conducted for the quantification of debris impact loads on the structure and is then numerically simulated by introducing a vegetation patch in the flume to mitigate this extreme impact loading. Finally, a relationship between trunk tilting and its corresponding underestimation of peak debris impact load on a column structure for half emerged vegetation patch is shown. This study provides significant understanding on the effect of coastal vegetation in mitigating peak debris impact.

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Section: Introductionmentioning

confidence: 99%

Effectiveness of emergent coastal vegetation as a defence system to mitigate debris load on a structure during extreme event

Gupta

Behera

2023

Preprint

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“…Kobayashi et al (1993) proposed an analytical expression for submerged vegetation and tested the phenomenon by using experimental data from experiments conducted in a wave tank roughened with artificial vegetation elements. The effect of different vegetation species (i.e., Laminaria hyperborea) on wave propagation, wave run-up, and coastal and dune erosion rates were later studied and modeled by other researchers (Lovas and Torum, 2001;Massel et al, 1999;Noarayanan et al, 2012;Le Bouteiller and Venditti, 2014). These laboratory-based studies were designed mainly to understand the interaction between vegetation and flow resistance.…”

Section: Introductionmentioning

confidence: 99%

Influence of Emergent Vegetation on Sediment Yield at Cross-Shore Coastal Environments

Türker

Yağci

Riazi

et al. 2017

Int. Conf. Coastal. Eng.

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This study aimed to conceptually analyze the change in the magnitude of offshore sediment yield, wave energy, and offshore dislocation of sediment particles on coastal regions in the presence of coastal vegetation. This was achieved by comparing the simultaneous physical changes at coastal zones that were partly covered with vegetation while the remaining part had no vegetation. Series of experiments were conducted, and the interactions between the vegetation parameter, ratio of sediment yields, and offshore sediment dislocation distances were analyzed and determined to define the relationship between the parameters. The resultant empirical equations mostly followed a power relationship and fit the experimental data. The energy decay coefficient, reflecting the energy used in the presence of the vegetation, had strong protection ability and approached 80% energy decay as the vegetation parameter increased. The performance of natural vegetation cover was adequate, simulating a 50-80% decrease in offshore sediment yield, depending on the magnitude of the vegetation parameter.

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