Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
doi:10.5194/nhess-2017-11
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
07 Apr 2017
Review status
This discussion paper is under review for the journal Natural Hazards and Earth System Sciences (NHESS).
Wave-current interaction during Hudhud cyclone in the Bay of Bengal
Volvaiker Samiksha1, Ponnumony Vethamony1, Antony Charls1, Bhaskaran Prasad2, and Nair Balakrishnan3 1Physical Oceanography Division, CSIR – National Institute of Oceanography, Dona Paula, 403004, Goa – India
2Department of Ocean Engineering and Naval Architecture, Indian Institute of Technology Kharagpur, Kharagpur – 721 302, India
3Indian National Centre for Ocean Information Services, Hyderabad – 500 090, India
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.

Citation: Samiksha, V., Vethamony, P., Charls, A., Prasad, B., and Balakrishnan, N.: Wave-current interaction during Hudhud cyclone in the Bay of Bengal, Nat. Hazards Earth Syst. Sci. Discuss., doi:10.5194/nhess-2017-11, in review, 2017.
Volvaiker Samiksha et al.
Volvaiker Samiksha et al.
Volvaiker Samiksha et al.

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