Role of continental shelf on non-linear interaction of storm surges, tides and wind waves: An idealized study representing the west coast of India

Poulose, Jismy; Rao, A. D.; Bhaskaran, Prasad K.

doi:10.1016/j.ecss.2017.06.007

Cited by 38 publications

(19 citation statements)

References 34 publications

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“…SWAN was set up with Cavaleri and Malanotte-Rizzoli (1981) wave growth physics; the shallow water triad nonlinear interaction was computed using the lumped triad approximation of Eldeberky (1996). Earlier studies Gayathri et al, 2015, Dhana Lakshmi et al, 2017Bhaskaran et al, 2013;Murty et al, 2014Murty et al, , 2016Poulose et al, 2017), carried out using the formulation of Komen et al (1984) for cyclones which occurred in the Indian Ocean region, showed that SWAN with this scheme performed well for extreme weather events. Keeping this in view, in the present study, we have used the same formulation of Komen et al (1984) to study the wave-current interaction during the Hudhud event.…”

Section: Model Domain and Set-upmentioning

confidence: 99%

“…A comprehensive review on the coastal inundation research and an overview of the processes for the Indian coast was reported by Gayathri et al (2017). One can find very few studies reported using a coupled model (ADCIRC with SWAN) for the Indian seas (Bhaskaran et al, 2013;Murty et al, 2014Murty et al, , 2016Poulose et al, 2017) for extreme weather events. These studies examined the performance of coupled models and role of improved wind forcing on waves and hydrodynamic conditions.…”

mentioning

confidence: 99%

“…Several studies (Rao et al, 1982;Murty et al, 1986;Dube et al, 1997Dube et al, , 2000Rao et al, 2013b) reported storm surge along the east coast of India. Rao et al (2013a) simulated surge and inundation using ADCIRC for the following cyclones: Kavali (1989), Andhra (1996) and Cuddalore (2000).…”

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confidence: 99%

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

Volvaiker¹,

Vethamony²,

Antony³

et al. 2017

Nat. Hazards Earth Syst. Sci.

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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 H s 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.

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Section: Model Domain and Set-upmentioning

confidence: 99%

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confidence: 99%

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

Volvaiker¹,

Vethamony²,

Antony³

et al. 2017

Nat. Hazards Earth Syst. Sci.

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“…Pandey and Rao () performed extensive validation of storm surges for the recent cyclones using coupled (ADCIRC+SWAN) model and found that surge residuals are better compared with observations after including the effect of wind waves in TWL. Recently, Poulose et al () conducted numerical experiments to explain the impact of varying continental shelf width on the generation of storm surges and its interaction with tides as well as wind waves. They showed that there is an increment of about 12 cm in storm surge for every 10‐km increase in the shelf width, and the nonlinear interaction is 15–20% at any tidal phase.…”

Section: Introductionmentioning

confidence: 99%

“…It will further help to advance our forecasting capability, policy planning, and risk resilient development options. The generation of storm surges along the coast depends on number of factors such as cyclone intensity (Zhong et al, ), forward speed (Rego & Li, ), size of the storm that is radius of maximum winds (Peng et al, , ), orientation of the coastline (Dube et al, ), coastal bathymetry (Johns et al, ), and width and slope of the continental shelf (Poulose et al, ) and angle at which the cyclone is crossing the coast (Zhang, ).…”

Section: Introductionmentioning

confidence: 99%

Impact of Approach Angle of an Impinging Cyclone on Generation of Storm Surges and Its Interaction with Tides and Wind Waves

Pandey

Rao

2019

JGR Oceans

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Detailed investigation is made on the effect of cyclone's approach angle on generation of storm surges and its nonlinear interaction with tides and wind waves using a standalone 2DDI ADCIRC and a coupled ADCIRC+SWAN model. Numerical experiments are executed using 17 idealized straight cyclone tracks of same intensity moving at constant forward speed. The study domain considers an idealized bathymetry with straight coastline and uniform shelf width. All cyclones make landfall at the same location with angles approaching from 10°to 170°with an increment of 10°. The simulations show that the maximum storm surge is computed for tracks land falling with 60 o -90 o . Increase in the peak storm surge is seen about 15% from 10 o -60 o , while it decreases by about 13% from 90 o -170 o . Surge-wave interaction modifies the maximum water level by about 21-26%. The maximum wave contribution is seen for track with 90 o followed by 160 o and 20 o . During different phases of tide, surge-tide interaction modifies peak surge, its occurrence, and location as cyclone makes landfall at different angles. The extent of affected coastal stretch is maximum on either side of the landfall for the tracks moving close to the coast, while it is minimum for the perpendicular track (90 o ), confined only to the right of the landfall. The peak surge-tide-wind wave interaction along the coast at both high and low tide is seen about 2-4 hr after the landfall. The interaction along the coast depends on approach angles of the cyclone; however, the total water level is mainly modified by both tidal phase and approach angle.Plain Language Summary Tropical cyclone-induced storm surges have a large potential to cause extensive damage of property and life along the coast. Storm surges combined with tides and wind waves become even more destructive for the coastal regions. Many cyclones in the Bay of Bengal experience a recurvature from the usual path and makes landfall from any direction. Therefore, to enhance the forecasting abilities, it is essential to understand the impact of cyclone's approach angle on the generation of storm surges and the nonlinear interaction of surges with tides and wind waves. In this study, idealized experiments are performed using numerical models to understand these processes. The simulations suggest that the perpendicular cyclone track causes maximum storm surges and interaction with tides and wind waves compared to any other track.

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