A Bay–River Coupled Model for Storm Surge Prediction Along the Andhra Coast of India |
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Authors: | Neetu Agnihotri P Chittibabu Indu Jain P C Sinha A D Rao S K Dube |
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Institution: | (1) Center for Atmospheric Sciences, IIT Delhi, New Delhi, 110016, India;(2) Baird & Associates, 1145 Hunt Club Road, Suite 1, Ottawa, K1V 0Y3, Canada;(3) Indian Institute of Technology, Kharagpur, West Bengal, 721302, India;(4) Institute of Oceanography, Kustem, 21030 Kuala Terengganu, Malaysia |
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Abstract: | The paper describes a two-dimensional bay–river coupled numerical model for storm surges along the Andhra coast of India.
The effect of the Krishna and Godavari rivers on the surge development is analysed. A comparative study of the surge generated
by a tropical cyclone with and without the inclusion of rivers is done in detail. Three cyclones that struck the Andhra coast
in November 1977, May 1990 and November 1996 were used for the simulation studies. It is found that the idealized model without
a river overestimates the sea-level elevation as compared to a more realistic bay–river coupled model. The temporal variation
of surge values at the mouth of the rivers is also studied for all three cyclone cases. It is found that the effect of the
presence of rivers depends on the strength of the cyclone, its point of landfall and the location of the rivers with respect
to the landfall point. |
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Keywords: | numerical model storm surge Andhra coast tropical cyclone |
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