Numerical modelling of tide-surge interaction in the Bay of Bengal

Johns, B.; Rao, A. D.; Dube, S. K.; Sinha, P. C.

doi:10.1098/rsta.1985.0002

Cited by 80 publications

(30 citation statements)

References 5 publications

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“…The model is fully non-linear and is forced by wind stress and quadratic bottom friction. The applied surface wind-stress is determined from a bulk quadratic law (Johns et al 1985), in which wind speed and direction are specified. It is found that the non-linear advection terms have a significant effect on the final results, especially in the shallow coastal waters of the head Bay of Bengal.…”

Section: Storm Surge Modelmentioning

confidence: 99%

Storm surge modelling for the Bay of Bengal and Arabian Sea

Dube¹,

Indu²,

Rao³

et al. 2009

Nat Hazards

168

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Section: Storm Surge Modelmentioning

confidence: 99%

Storm surge modelling for the Bay of Bengal and Arabian Sea

Dube¹,

Indu²,

Rao³

et al. 2009

Nat Hazards

168

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“…Attention has been paid to the importance of tide-surge interaction in some other regions. Johns et al [1985] showed that tide-surge interaction produces a substantial effect off the Orissa coast of India and causes the sea surface elevation either to increase above or to decrease below its pure surge value. As-Salek and Yasuda [2001] found that the tide-surge interaction in the Meghna estuary of Bangladesh displays the progressive wave nature of local tide.…”

Section: Introductionmentioning

confidence: 99%

Tide‐surge Interaction Intensified by the Taiwan Strait

et al. 2010

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[1] The Taiwan Strait is a long and wide shelf-channel where the hydrodynamics is extremely complex, being characterized by strong tides, and where storm surges frequently occur during the typhoon season. Obvious oscillations due to tide-surge interaction were observed by tide gauges along the northern Fujian coast, the west bank of the Taiwan Strait, during Typhoon Dan (1999). Numerical experiments indicate that nonlinear bottom friction (described by the quadratic formula) is a major factor to predict these oscillations while the nonlinear advective terms and the shallow water effect have little contribution. It is found that the tide-surge interaction in the northern portion of the Taiwan Strait is intensified by the strait. Simulations based on simplified topographies with and without the island of Taiwan show that, in the presence of the island, the channel effect strengthens tidal currents and tends to align the major axes of tidal ellipses along the channel direction. Storm-induced currents are also strengthened by the channel. The pattern of strong tidal currents and storminduced currents along the channel direction enhances tide-surge interaction via the nonlinear bottom friction, resulting in the obvious oscillations along the northern Fujian coast.

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“…The pure astronomical tide (termed "tide only runs") and pure surge without tidal effect (termed "meteorology only runs") are also calculated. The procedure to investigate the surge-tide interaction phenomena is similar to the procedure that was previously applied by Johns et al [46] at the Bay of Bengal along the Orissa coast. Faster and slower tracks are generated compared to the base cases to find out the impact of cyclone translation speed upon surge characteristics.…”

Section: Numerical Experiments Conditionsmentioning

confidence: 99%

Impact of Cyclone Track Features and Tidal Phase Shift upon Surge Characteristics in the Bay of Bengal along the Bangladesh Coast

Hussain

Tajima

Hossain

et al. 2017

JMSE

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Abstract:The impact of cyclone track features (e.g., cyclone translation speed, cyclone path and cyclone landfall crossing angle) in combination with tidal phase shift upon surge characteristics have been investigated at the Bay of Bengal along the Bangladesh coast. A two-dimensional hydrodynamic model in a horizontal direction (2DH) coupled with a storm-surge model has been employed for the study. Numerical experiments with three different cyclone translation speeds show that when the surge height is directly forced by the cyclonic wind speed especially within the RWM (Radius of Maximum Wind), faster translation speed produces reduced surge height as the cyclone gets less time to force the water. On the other hand, at locations outside the RMW, surge waves travel as a propagating long wave where higher surges are produced by faster moving cyclones. It is found that surge arrival times are more and more affected by tidal phase when cyclone translation speed is reduced. Analysis of seven hypothetical parallel cyclone paths show that local bathymetry and complex coastline configurations strongly influence the surge height and surge arrival time along the Bangladesh coast. From the analyses of cyclone landfall crossing angles at the Khulna and Chittagong coasts, it is observed that surge durations are the smallest at both the coasts when the coastline crossing angles are the smallest.

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Numerical modelling of tide-surge interaction in the Bay of Bengal

Cited by 80 publications

References 5 publications

Storm surge modelling for the Bay of Bengal and Arabian Sea

Storm surge modelling for the Bay of Bengal and Arabian Sea

Tide‐surge Interaction Intensified by the Taiwan Strait

Impact of Cyclone Track Features and Tidal Phase Shift upon Surge Characteristics in the Bay of Bengal along the Bangladesh Coast

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