scholarly journals Wave-current interaction during Hudhud cyclone in the Bay of Bengal

2017 ◽  
Author(s):  
Volvaiker Samiksha ◽  
Ponnumony Vethamony ◽  
Antony Charls ◽  
Bhaskaran Prasad ◽  
Nair Balakrishnan
Keyword(s):  
Coastal Current ◽  
Shelf Area ◽  
Total Water ◽  
Cyclonic Storm ◽  
Waves And Currents ◽  
Wave Heights ◽  
Current Interaction ◽  
Holland Model ◽  
Severe Cyclonic Storm ◽  
Total Water Level

Abstract. The present work describes the interaction between waves and currents utilizing a coupled ADCIRC + SWAN model for the very severe cyclonic storm Hudhud which made landfall at Visakhapatnam on the east coast of India in October 2014. Model computed wave and surge heights were validated with measurements near the landfall point. The Holland model reproduced the maximum wind speed of ≈ 54 m/s with the minimum pressure of 950 hPa. The modelled maximum surge of 1.2 m matches with the maximum surge of 1.4 m measured off Visakhapatnam. The two-way coupling with SWAN showed that waves contributed ≈ 0.25 m to the total water level during the Hudhud event. At the landfall point near Visakhapatnam, the East India Coastal Current speed increased from 0.5 to 1.8 m/s for a short duration (≈ 6 h) with net flow towards south, and thereafter reversed towards north. An increase of ≈ 0.2 m in Hs was observed with the inclusion of model currents. It was also observed that when waves travelled normal to the coast after crossing the shelf area, with current towards southwest, wave heights were reduced due to wave-current interaction; however, an increase in wave height was observed on the left side of the track, when waves and currents opposed each other.

scholarly journals Wave–current interaction during Hudhud cyclone in the Bay of Bengal

2017 ◽  
Vol 17 (12) ◽  
pp. 2059-2074 ◽  
Author(s):  
Volvaiker Samiksha ◽  
Ponnumony Vethamony ◽  
Charls Antony ◽  
Prasad Bhaskaran ◽  
Balakrishnan Nair
Keyword(s):  
Coastal Current ◽  
Shelf Area ◽  
Cyclonic Storm ◽  
The North ◽  
Waves And Currents ◽  
Wave Heights ◽  
Current Interaction ◽  
Holland Model ◽  
Severe Cyclonic Storm ◽  
Total Water Level

Abstract. The present work describes the interaction between waves and currents utilizing a coupled ADCIRC+SWAN model for the very severe cyclonic storm Hudhud, which made landfall at Visakhapatnam on the east coast of India in October 2014. Model-computed wave and surge heights were validated with measurements near the landfall point. The Holland model reproduced the maximum wind speed of  ≈  54 m s−1 with the minimum pressure of 950 hPa. The modelled maximum surge of 1.2 m matches with the maximum surge of 1.4 m measured off Visakhapatnam. The two-way coupling with SWAN showed that waves contributed  ≈  0.25 m to the total water level during the Hudhud event. At the landfall point near Visakhapatnam, the East India Coastal Current speed increased from 0.5 to 1.8 m s−1 for a short duration ( ≈  6 h) with net flow towards the south, and thereafter reversed towards the north. An increase of  ≈  0.2 m in Hs was observed with the inclusion of model currents. It was also observed that when waves travelled perpendicular to the coast after crossing the shelf area, with current towards the southwest, wave heights were reduced due to wave–current interaction; however, an increase in wave height was observed on the left side of the track, when waves and currents opposed each other.

SIMULATION OF NEARSHORE WAVES AND CURRENTS ALONG SALALAH COAST (OMAN) DURING THE TROPICAL CYCLONE ARB01

2017 ◽  
Author(s):  
AbdAlla M. AbdAlla ◽  
AbdAlla M. AbdAlla ◽  
Abkar A. Iraqi ◽  
Abkar A. Iraqi ◽  
Magdy M. Farag ◽  
...  
Keyword(s):  
Tropical Cyclone ◽  
Domain Boundary ◽  
Circulation Model ◽  
Shielding Effect ◽  
Strong Current ◽  
Waves And Currents ◽  
Wave Heights ◽  
Nearshore Waves ◽  
Flood Period ◽  
Significant Wave Heights

Sea level and wave data at Salalah coast (Oman) were used to simulate nearshore waves and current during the tropical cyclone ARB01 (9 May2002). STWAVE model (Steady State Spectral Wave) was applied for nearshore wave simulation, while M2D model ((Two-Dimensional Depth Averaged circulation model) was used to simulate nearshore current. The results of simulations (taking into account the mutual effects of both current and waves) showed that: The significant wave heights generally decrease from about 6m at the domain boundary to about 1 m close to the coast. The wave heights during the ebb period were higher than that during the flood period by about 1.5m. Along Salalah coast, higher waves were found along the eastern side of the domain. This is because the shielding effect of breakwater, which protect the western part of the coast from high waves. Relatively Strong current with values up to 1.5 ms-1 were found in the nearshore region during both ebb and flood periods. The M2D model results also showed cyclonic circulations during these periods which help in the renewal of harbor waters. Generally, the model results showed good agreements with observations in the investigated area.

Numerical Modeling of Seabed Response to Combined Wave-Current Loading

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
J.-S. Zhang ◽  
Y. Zhang ◽  
C. Zhang ◽  
D.-S. Jeng
Keyword(s):  
Numerical Modeling ◽  
Stokes Equations ◽  
Navier Stokes ◽  
Laboratory Measurements ◽  
Navier Stokes Equations ◽  
Closure Scheme ◽  
Waves And Currents ◽  
Current Interaction ◽  
Wave Maker ◽  
Current Loading

In this paper, a numerical model is developed to study the dynamic response of a porous seabed to combined wave-current loadings. While the Reynolds-averaged Navier–Stokes equations with k-ε turbulence closure scheme and internal wave-maker function are solved for the phenomenon of wave-current interaction, Biot's poro-elastic “u-p” model is adopted for the seabed response. After validated by the laboratory measurements, this model is applied for the investigation of the effects of waves and currents on the wave-current induced pore pressures. Furthermore, the effects of currents on maximum liquefaction depths of a porous seabed is examined, and it is concluded that the opposite currents will increase the liquefaction depth up to 30% of that without currents.

Impact of Moisture Transport and Boundary Layer Processes on a Very Severe Cyclonic Storm Using the WRF Model

2019 ◽  
Vol 176 (12) ◽  
pp. 5445-5461 ◽  
Author(s):  
S. S. V. S. Ramakrishna ◽  
Nellipudi Nanaji Rao ◽  
B. Ravi Srinivasa Rao ◽  
P. Srinivasa Rao ◽  
C. V. Srinivas ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Moisture Transport ◽  
Wrf Model ◽  
Cyclonic Storm ◽  
Boundary Layer Processes ◽  
Severe Cyclonic Storm

scholarly journals Deriving the 100-Year Total Water Level around the Coast of Corsica by Combining Trivariate Extreme Value Analysis and Coastal Hydrodynamic Models

2021 ◽  
Vol 9 (12) ◽  
pp. 1347
Author(s):  
Jessie Louisor ◽  
Jérémy Rohmer ◽  
Thomas Bulteau ◽  
Faïza Boulahya ◽  
Rodrigo Pedreros ◽  
...  
Keyword(s):  
Water Level ◽  
Return Period ◽  
Extreme Value ◽  
Coastal Areas ◽  
Extreme Value Analysis ◽  
Total Water ◽  
Hydrodynamic Models ◽  
Value Analysis ◽  
Multivariate Extreme Value ◽  
Total Water Level

As low-lying coastal areas can be impacted by flooding caused by dynamic components that are dependent on each other (wind, waves, water levels—tide, atmospheric surge, currents), the analysis of the return period of a single component is not representative of the return period of the total water level at the coast. It is important to assess a joint return period of all the components. Based on a semiparametric multivariate extreme value analysis, we determined the joint probabilities that significant wave heights (Hs), wind intensity at 10 m above the ground (U), and still water level (SWL) exceeded jointly imposed thresholds all along the Corsica Island coasts (Mediterranean Sea). We also considered the covariate peak direction (Dp), the peak period (Tp), and the wind direction (Du). Here, we focus on providing extreme scenarios to populate coastal hydrodynamic models, SWAN and SWASH-2DH, in order to compute the 100-year total water level (100y-TWL) all along the coasts. We show how the proposed multivariate extreme value analysis can help to more accurately define low-lying zones potentially exposed to coastal flooding, especially in Corsica where a unique value of 2 m was taken into account in previous studies. The computed 100y-TWL values are between 1 m along the eastern coasts and a maximum of 1.8 m on the western coast. The calculated values are also below the 2.4 m threshold recommended when considering the sea level rise (SLR). This highlights the added value of performing a full integration of extreme offshore conditions, together with their dependence on hydrodynamic simulations for screening out the coastal areas potentially exposed to flooding.

Characteristics of Very Severe Cyclonic Storm “SIDR” over the Bay of Bengal During 11-16 November 2007

2009 ◽  
pp. 327-337
Author(s):  
Ajit Tyagi ◽  
M. Mohapatra ◽  
B. K. Bandyopadhyay ◽  
Charan Singh ◽  
Naresh Kumar
Keyword(s):  
Bay Of Bengal ◽  
Cyclonic Storm ◽  
Severe Cyclonic Storm

Very severe cyclonic storm impacts to shoreline and beach profiles along the Karaikal coast of India

2020 ◽  
pp. 1-10
Author(s):  
Sriganesh Jeyagopal ◽  
Vasanthakumar Singaravelu ◽  
Mikkilineni Dhananjayan ◽  
V. Sundar ◽  
S.A. Sannasiraj ◽  
...  
Keyword(s):  
Cyclonic Storm ◽  
Severe Cyclonic Storm
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