Cette étude concerne la réponse morphosédimentaire de la plage fortement anthropisée d'Agadir à la série de tempêtes qui a affecté les côtes nord-est atlantiques au cours du mois de janvier 2014. Les résultats obtenus ont montré que la réponse morpho sédimentaire de la zone intertidale était très différente entre le nord et le sud de la baie; chaque profil de la plage a présenté un mode de comportement spécifique. Cette réponse est contrôlée par plusieurs paramètres dont la variation des caractéristiques hydrodynamiques au niveau de la baie, la pente initiale de l'estran juste avant les tempêtes, l'orientation du trait de côte et l'angle d'incidence de la houle au point de déferlement.
In this article, we present a study that focuses on forecasting the one hundred-years return period waves height using two methods; i) Peak Over Threshold (POT) and ii) Annual Maxima (MA). The analysis is carried out at three points at the Atlantic coast of northern Morocco. The results obtained by these two methods indicate a difference of less than 10 % and have shown that to ensure safe dimensioning of maritime structures, the application of the two statistical methods is necessary. This is explained by the drawbacks encountered in both methods. In the MA method, the inconvenience is linked to the choice of non-extreme events when no significant storm is recorded during one year, furthermore, the non-consideration of important events recorded in other year. In the second method (POT), the difficulty consists in the uncertainty of the calculations by the POT method due to the mistrust associated with the choice of the censoring threshold.
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