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Return period estimates of extreme sea level along the east coast of India from numerical simulations

DRS at CSIR-National Institute of Oceanography

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Title Return period estimates of extreme sea level along the east coast of India from numerical simulations
 
Creator Sindhu, B.
Unnikrishnan, A.S.
 
Subject storm surges
sea level
numerical analysis
models
 
Description Estimates of return periods of extreme sea level events along the coast are useful for impact assessment. A vertically integrated 2D model was developed for the simulation of storm surges in the Bay of Bengal. The bathymetry for the model was derived from an improved ETOPO-5 data set (earlier work). The meteorological forcing for the model was obtained from the cyclone model of Holland using the data available for 136 low-pressure systems occurred during 1974–2000 in the Bay of Bengal. The simulated total sea level and the surge component were obtained for each event. The simulated peak levels showed good agreement with the observations available at few stations. The annual maxima of sea levels, extracted from the simulations, were fitted with Gumbel distribution using r-largest annual maxima method to estimate the 5- and 50-year return periods of extreme events at 26 stations along the east coast of India. The return periods estimated from simulated sea levels showed good agreement with those obtained from observations. The 5- and 50-year return levels of total sea level along the east coast of India show a considerable increase from south to north, with the 50-year return total sea levels being as high as 6.9 and 8.7 m at stations along the north eastern coast such as Sagar Island and Chandipur, respectively.
 
Date 2012-04-04T12:10:31Z
2012-04-04T12:10:31Z
2012
 
Type Journal Article
 
Identifier Natural Hazards, vol.61; 2012; 1007-1028
no
http://drs.nio.org/drs/handle/2264/4041
 
Language en
 
Relation Nat_Hazards_61_1007.jpg
 
Rights An edited version of this paper was published by Springer. This paper is for R & D purpose and Copyright [2012] Springer.
 
Publisher Springer