Analysis of Wind-Waves With Swan on Structured Mesh and Unstructured Mesh During the Arrival of Typhoon

Amunugama, Mangala; Suzuyama, Katsuyuki; Manawasekara, Chathura; Tanaka, Yoshisato; Xia, Yuhan

doi:10.2208/jscejoe.75.i_283

Cited by 1 publication

(3 citation statements)

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“…According to the bathymetry of the research region, shallow water extends up to 550 m from the coast with a depth range between 2 and 3 m. Generally, for wave simulation, the research and commercial models use flexible grid mesh (structured and unstructured grids). In previous studies [17,21], it was observed that simulations with structured or unstructured grids were substantially consistent. In this study, we use a nested regular grid with a resolution of approximately 25 m, as shown in Figure 3.…”

Section: Bathymetrymentioning

confidence: 78%

“…The Simulating Waves Nearshore (SWAN) model is one of the most very popular wind-wave models [16][17][18][19][20][21][22][23][24][25][26][27], used by many government organizations, research institutes and consulting companies worldwide, to predict the size and forces of waves, allowing for changes in wave propagation from deep water to the surf zone [14]. Based on SWAN manuals and as outlined in Lin [14], the model's primary function is to resolve the spectral action balance equations, which represent the effects of spatial propagation, refraction, shoaling, generation, dissipation and nonlinear wave-wave interactions, without imposing any a priori constraints on the spectral evolution of wind waves.…”

Section: Introductionmentioning

confidence: 99%

“…Hoque et al [16] found that, after examining the bottom friction effects and triad interactions in predicting shallow-water waves, the simulated results in terms of significant wave heights and peak period are in good agreement with the observed data. Amunugama et al [17] analyzed wind waves with SWAN on structured mesh and unstructured mesh during the arrival of a typhoon. After comparing the simulated results with measured data, they confirmed that the wind-wave characteristics obtained by both approaches (structured SWAN and unstructured SWAN) were substantially consistent with some advantages of unstructured SWAN, especially in complex geometries.…”

Section: Introductionmentioning

confidence: 99%

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SWAN Modeling of Dredging Effect on the Oued Sebou Estuary

Iouzzi

Mouakkir

Meftah

et al. 2022

Water

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The estuary ecosystem’s health and ecological integrity are essential for preserving environmental quality, habitats, and economic activity. The main objective of the present study is to comprehend the wave hydrodynamic impact on the Oued Sebou estuary, which is situated in the Kenitra region on Morocco’s north Atlantic coast in North Africa. Specifically, it focused on the dredging effect (caused by sand extraction) on the wave motion and its impact on the estuary environment. Different scenarios of wave-propagation simulations were carried out, varying the significant wave height, in deep water (from 1.5 to 4 m), and considering the bathymetry before and after two dredging cases of 2- and 4-m depths. The change of wave height at the Oued Sebou estuary shoreline was simulated by using the third version of the Simulating Waves Nearshore Model (SWAN). The SWAN model formulates the wave evolution in terms of a spectral energy balance on a structured grid. The effect of dredging on the wave spreading in addition to the flow hydrodynamic structures were extensively analyzed. According to the simulated results, the dredging activities in the Oued Sebou estuary mainly affect the river mouth and the southern breakwater area, increasing the potential erosive action. The areas at the northern coastal strip and near the northern breakwater are subject to possible accumulation of sediments.

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Section: Bathymetrymentioning

confidence: 78%