Numerical study of tsunami wave run-up and land inundation on coastal vegetated beaches

Zhang, Hongxing; Zhang, Mingliang; Ji, Yongpeng; Wang, Yini; Xu, Tianping

doi:10.1016/j.cageo.2019.06.010

Cited by 20 publications

(4 citation statements)

References 34 publications

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“…The physical variables are the same in every triangular mesh element because of the average depth integration in the equation; a series of piecewise functions are developed in the solution domain. The approach of the Monotonic Upstream-Centered Scheme for Conservation Laws with a multi-dimensional limiter and the Roe's approximate Riemann solver were used to calculate the interface fluxes between triangular grid cells [32][33].…”

Section: Hydrodynamic Modelmentioning

confidence: 99%

Modeling the impact of culture facilities on hydrodynamic and solute transport in marine aquaculture waters of the North Yellow Sea

Jiang¹,

Ji²,

Zhang³

2021

Preprint

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An increasing number of marine aquaculture facilities are being placed in shallow bays and open sea. In this study, we present a coupled hydrodynamic and solute transport model with high-resolution schemes in marine aquaculture waters based on depth-averaged shallow water equations. A new expression of drag force is incorporated into momentum equations to express the resistance of suspended culture cages. The coupled model is used to simulate the effect of suspended structures on the tidal current and the motion of a contaminant cloud in the marine aquaculture of the North Yellow Sea, China. Simulation results show a low-velocity area inside the aquaculture cage area, with a maximum reduction rate of velocity close to 45% under high-density culture. The results also show that the tidal currents are sensitive to the suspended cage densities, cage length and drag coefficients of cages. The transport processes of pollutants inside aquaculture facilities are inhibited away from the vicinity of the culture cage area because of the reduction in tidal currents; therefore, the suspended cages significantly affect the transport processes of pollutants in coastal aquaculture waters. Furthermore, the reduction in the horizontal velocity can significantly decrease the food supply for aquaculture areas from the outside sea. The results of this study provide new insight into the planning of high-density suspended facilities for coastal aquaculture activities.

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Section: Hydrodynamic Modelmentioning

confidence: 99%

Modeling the impact of culture facilities on hydrodynamic and solute transport in marine aquaculture waters of the North Yellow Sea

Jiang¹,

Ji²,

Zhang³

2021

Preprint

Self Cite

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“…For instance, by applying an improved Boussunesq wave model, the wave attenuation properties of flexible and rigid vegetation patches were systematically analyzed by Augustin et al [45] and Huang et al [22]. In addition, the hydrodynamic processes of ocean surface waves in the vegetation patches were also numerically simulated by applying the shallow water equations [46][47][48]. Nevertheless, the complex flow field within the wave-vegetation interactions often contains strong vertical accelerations, which beyond the computational capability of the Boussinesq wave model and the nonlinear shallow water models [49].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis on Influences of Emergent Vegetation Patch on Runup Processes of Focused Wave Groups

Lie

Wang

et al. 2022

JMSE

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During severe weather, the runup of the devasting surges and waves can cause extensive damages to the coastal facilities and results in significant loss of life. Therefore, it becomes necessary to find reliable measures to reduce the wave runup in coastal regions. As a natural barrier to the shorelines, coastal vegetation has great potential to attenuate wave runup and to prevent the coastal communities from extreme floodings and huge land loss. This study numerically discusses the influences of the emergent vegetation patch on the runup processes of extreme wave groups by applying a nonhydrostatic flow solver. Influences of the major factors, i.e., water depth, peak wave period, significant wave height, and density and length of the vegetation patch, are analyzed in detail. Research findings indicate that the presence of the emergent vegetation patch can substantially dissipate most of the incident wave energy and effectively reduce the maximum wave runup heights of extreme wave groups at the sloped beach. It is hoped that the research results of this study will be helpful to the design of coastal soft protection measures.

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“…But as the waves travel onshore, they increase in height as the bathymetry gradually decrease, becoming potentially destructive (e.g., the tsunami in Indian Ocean in December 2004, or in Japan in March 2011). Usually the tsunami were modelled as solitary waves and obliviously the shoaling, breaking, and run-up are phenoma of major interest for researcher [4][5][6][7][8][9]. The high computational power of modern computers and parallel computing make it possible to solve more and more complex fluid dynamics problems.…”

Section: Introductionmentioning

confidence: 99%

Tsunami Propagation and Flooding in Sicilian Coastal Areas by Means of a Weakly Dispersive Boussinesq Model

Manno

Ciraolo

2020

Water

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This paper addresses the tsunami propagation and subsequent coastal areas flooding by means of a depth-integrated numerical model. Such an approach is fundamental in order to assess the inundation hazard in coastal areas generated by seismogenic tsunami. In this study we adopted, an interdisciplinary approach, in order to consider the tsunami propagation, relates both to geomorphological characteristics of the coast and the bathymetry. In order to validate the numerical model, comparisons with results of other studies were performed. This manuscript presents first applicative results achieved using the weakly dispersive Boussinesq model in the field of tsunami propagation and coastal inundation. Ionic coast of Sicily (Italy) was chosen as a case study due to its high level of exposure to tsunamis. Indeed, the tsunami could be generated by an earthquake in the external Calabrian arc or in the Hellenic arc, both active seismic zones. Finally, in order to demonstrate the possibility to give indications to local authorities, an inundation map, over a small area, was produced by means of the numerical model.

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Numerical study of tsunami wave run-up and land inundation on coastal vegetated beaches

Cited by 20 publications

References 34 publications

Modeling the impact of culture facilities on hydrodynamic and solute transport in marine aquaculture waters of the North Yellow Sea

Modeling the impact of culture facilities on hydrodynamic and solute transport in marine aquaculture waters of the North Yellow Sea

Numerical Analysis on Influences of Emergent Vegetation Patch on Runup Processes of Focused Wave Groups

Tsunami Propagation and Flooding in Sicilian Coastal Areas by Means of a Weakly Dispersive Boussinesq Model

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