VALIDATION OF THE SWAN MODEL FOR THE INFLUENCE OF OPPOSITE CURRENTS ON THE WAVE SPECTRA

2015 ◽  
Vol 14 (4) ◽  
pp. 751-761 ◽  
Author(s):  
Liliana Rusu ◽  
Angela Ivan
Keyword(s):  
Wave Spectra ◽  
Swan Model

Directional Wave Spectra from Video Images Data and SWAN Model

2015 ◽  
Vol 74 (5) ◽  
Author(s):  
Muhammad Zikra ◽  
Noriaki Hashimoto ◽  
Masaru Yamashiro ◽  
Kojiro Suzuki
Keyword(s):  
Shallow Water ◽  
Water Area ◽  
Paper Analysis ◽  
Wave Spectra ◽  
Swan Model ◽  
Video Images ◽  
Shallow Water Area ◽  
Directional Wave ◽  
Probe Sensor ◽  
Rectification Process

In this paper, analysis of directional wave spectra in shallow water area estimated by video images data has been compared with numerical model of SWAN. Estimation of directional wave spectra from video images is based on the Bayesian Directional Method using a group of pixels brightness on the image. For this study, the pixels can be considered equivalent to fixed instruments as wave probe sensor after rectification process. The results show that there is a good agreement between directional wave spectra estimated by video images data and the SWAN model. Both methods estimate similar shape of directional wave spectra in the shallow water. In addition, the energy distribution of directional wave spectra in shallow water is concentrated significantly in frequency and direction. 

scholarly journals Extreme Waves in the Agulhas Current Region Inferred from SAR Wave Spectra and the SWAN Model

2021 ◽  
Vol 9 (2) ◽  
pp. 153
Author(s):  
Sonia Ponce de León ◽  
C. Guedes Soares
Keyword(s):  
Numerical Simulations ◽  
Ocean Current ◽  
Winter Period ◽  
Wave Spectra ◽  
Extreme Waves ◽  
Study Region ◽  
Southern Limit ◽  
Agulhas Current ◽  
Swan Model ◽  
Current Region

The influence of the Agulhas Current on the wave field is investigated. The study is conducted by performing high resolution spectral wave model simulations with and without ocean currents. The validation of the numerical simulations is performed for the Significant Wave Height (Hs) using all possible satellite altimetry data available in the study region for a winter period of 2018. Wave spectra and extreme waves parameters are examined in places where waves and current are aligned in the Agulhas Current. Sentinel-1 (S1) wave mode Synthetic Aperture Radar (SAR) spectra are used to estimate the composites of the Hs and BFI (Benjamin–Feir Index). SAR computed BFI and Hs were compared with the respective composites obtained from the Simulating Waves Nearshore (SWAN) model. From the Hs composites using SAR data and modeled data, it can be concluded that the Hs maxima values are distributed in the Agulhas Current Retroflection (ACR) and also in the southern limit of the domain that is affected by the strong circumpolar winds around Antarctic. In addition, the BFI composites exhibit the highest values in the ACR and some few values are observed in the southern border as occurred with the Hs. The results of this study indicate that there is direct correlation between the Agulhas Current strength, the Hs and the BFI. It was found that the modeled directional wave spectra are broadened when the ocean current is considered in the simulation. The analysis of the modeled wave spectra is performed over eddies, rings and meanders in the Agulhas Current region. The transformation of the wave spectra due to current refraction is discussed based on the numerical simulations. The effect of the Agulhas Current on the spectral shape is explored. The spectral wave energy grows when the wave and the current are aligned, resulting in peaked, elongated and widened spectra. A decrease of the peak period was observed before the occurrence of maximum values of BFI, which characterize abnormal sea states.

Observed Suspended Sediment Profiles under the Effect of Single and Double Peaked Wave Spectra

2006 ◽  
Author(s):  
M. R. Delgado Blanco ◽  
M. Olabarrieta Lizaso ◽  
A. Giardino ◽  
R. Banasiak ◽  
R. Verhoeven ◽  
...  
Keyword(s):  
Suspended Sediment ◽  
Wave Spectra ◽  
Sediment Profiles

INTERCOMPARATIVE STUDY OF LONG-YEAR WAVE HINDCASTING DATA SAMPLES BY USE OF BACKWARD RAY TRACING MODEL AND SWAN MODEL UNDER MSM-BASED WINDS CONDITION PROVIDED BY JMA

2018 ◽  
Vol 74 (4) ◽  
pp. I_457-I_462
Author(s):  
Masataka YAMAGUCHI ◽  
Hirokazu NONAKA ◽  
Yoshio HATADA ◽  
Yoshihiro UTSUNOMIYA ◽  
Kunimitsu INOUCHI ◽  
...  
Keyword(s):  
Ray Tracing ◽  
Swan Model ◽  
Wave Hindcasting ◽  
Ray Tracing Model

Multi-peaked directional wave spectra based on extensive field measurement data in the Gulf of Oman

2021 ◽  
Vol 230 ◽  
pp. 109057
Author(s):  
Mohammad Adibzade ◽  
Mehdi Shafieefar ◽  
Hassan Akbari ◽  
Roozbeh Panahi
Keyword(s):  
Field Measurement ◽  
Measurement Data ◽  
Wave Spectra ◽  
Gulf Of Oman ◽  
Extensive Field ◽  
Directional Wave

scholarly journals Self-similar gravity wave spectra resulting from the modulation of bound waves

2018 ◽  
Vol 3 (5) ◽  
Author(s):  
Guillaume Michel ◽  
Benoît Semin ◽  
Annette Cazaubiel ◽  
Florence Haudin ◽  
Thomas Humbert ◽  
...  
Keyword(s):  
Gravity Wave ◽  
Wave Spectra ◽  
Self Similar

Millimeter- and submillimeter-wave spectra of AuCl and AuBr in the X1Σ+ electronic ground states

2003 ◽  
Vol 220 (2) ◽  
pp. 155-161 ◽  
Author(s):  
Toshiaki Okabayashi ◽  
Emi Yamazaki ◽  
Kazuhiro Tsukamoto ◽  
Mitsutoshi Tanimoto
Keyword(s):  
Ground States ◽  
Submillimeter Wave ◽  
Wave Spectra ◽  
Electronic Ground
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