Abstract
The oil rigs that will be installed in the Lebanese offshore are floating rigs. This type can be affected by environmental risks such as extreme wind speed and wave height. We study these risks in Beddawi region in the northern Lebanon during the winter season by applying the extreme value theory to real data. We estimate at a first stage the return levels associated to return periods of 50, 100, and 500 years for each risk separately using the classical univariate theory. At a second stage, we use the logistic parametric model and the bivariate copula functions in multivariate extreme value theory to estimate the dependence between extreme wind speed and wave height as well as joint exceedance probabilities and joint return levels to take into consideration the risk of these two environmental factors simultaneously.
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