Probable maximum tropical cyclone parameters for east and west coast of India

D. Satish Kumar (), Manasa Ranjan Behera, Saikrishna Nadella and A. Vinod Kumar
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D. Satish Kumar: Homi Bhabha National Institute (HBNI)
Manasa Ranjan Behera: Indian Institute of Technology Bombay (IITB)
Saikrishna Nadella: Bhabha Atomic Research Centre (BARC)
A. Vinod Kumar: Homi Bhabha National Institute (HBNI)

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2023, vol. 116, issue 2, No 45, 2437-2455

Abstract: Abstract Storm surge simulation models require certain parameters for evaluating the worst possible event that could occur at a site with respect to a certain return period. The most significant probable maximum tropical cyclone parameters are pressure deficiency at the centre (ΔP) and maximum wind speed (Vmax) during the cyclone. In this study, the probable maximum tropical cyclone parameters that would yield the maximum probable storm surge along the Indian coasts of Arabian Sea and Bay of Bengal are estimated. Datasets are created based on various existing data archives for each basin. The datasets are subjected to extreme value analysis for determining the ΔP and Vmax parameters. The data are fitted to various probability distributions (Gumbel, Fréchet, Weibull and Log-normal) whose parameters (scale, shape, and location parameters) are estimated using graphical (least square fit) and numerical (order statistics approach) methods. A mean recurrence interval of 1000 and 10,000 years is considered for strategic structures. The best fit distribution and its parameters are obtained based on goodness of fit criteria. The resulting ΔP and Vmax are compared with theoretical maximum cyclone parameter values of each basin and revised till an optimal set of values are reached. The analysis shows that ΔP and Vmax values for Arabian Sea and Bay of Bengal are best represented by Weibull distribution. The estimated parameters are useful input to a storm surge model to determine the design basis flood level for the strategic coastal sites.

Keywords: PMTC; EVA; Storm surge; Least square fit method; Lieblein technique; Order statistics approach (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1007/s11069-022-05773-2

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