Statistical analysis on extreme wave height |
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Authors: | N V Teena V Sanil Kumar K Sudheesh R Sajeev |
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Institution: | 1. CSIR-National Institute of Oceanography (Council of Scientific & Industrial Research), Dona Paula, Goa, 403 004, India 2. Department of Physical Oceanography, Cochin University of Science and Technology, Kochi, 682 016, India
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Abstract: | The classical extreme value theory based on generalized extreme value (GEV) distribution and generalized Pareto distribution (GPD) is applied to the wave height estimate based on wave hindcast data covering a period of 31?years for a location in the eastern Arabian Sea. Practical concern such as the threshold selection and model validation is discussed. Estimates of wave height having different return periods are compared with estimates obtained from different distributions. On comparing the distributions fitted to the GEV with annual maximum approach and GPD with peaks over threshold approach have indicated that both GEV and GPD models gave similar or comparable wave height for the study area since there is no multiple storm event in a year. Influence of seasonality on wave height having different return period is also studied. |
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