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Uncertainty assessment: application to the shoreline / A. Payo in Journal of hydraulic research, Vol. 46 extra issue (2008) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 46 extra issue (2008) . - p. 96-104 Titre : Uncertainty assessment: application to the shoreline Titre original : Evaluation d'incertitude: application au littoral Type de document : texte imprimé Auteurs : A. Payo, Auteur ; A. Baquerizo, Auteur ; M. Losada, Auteur Article en page(s) : p. 96-104 Note générale : Hydraulique Résumé en Français Langues : Anglais (eng) Mots-clés : One-line  Empirical  orthogonal  functions  Monte-Carlo  method  Strom-event  sequences Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : It is impossible to know beforehand the planforms of a stretch of beach without being first aware of the maritime climate affecting it. This article describes a procedure for objectively calculating the uncertainty associated with the prediction of the evolution of a stretch of beach in terms of probability. On the basis of oceanographic data records as well as empirical orthogonal functions (EOF), we propose a procedure for the simulation of possible sequences of storm events. Such sequences were then entered as input for a morphodynamic model with a view to the subsequent generation of possible planforms. EOF methodology was then used to estimate the probability of each of the planforms thus generated. The case study presented here is that of the evolution of an initially straight sand beach where a rectangular tapered fill had been constructed. The beach is located upshore of a groin perpendicular to the coastline, and had blocked all longshore sediment transport. For this analysis we used a one-line model with time-dependent boundary conditions and a non-homogeneous diffusion coefficient. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com/ [article] Uncertainty assessment: application to the shoreline = Evaluation d'incertitude: application au littoral [texte imprimé] / A. Payo, Auteur ; A. Baquerizo, Auteur ; M. Losada, Auteur . - p. 96-104. Hydraulique Résumé en Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 46 extra issue (2008) . - p. 96-104 Mots-clés : One-line  Empirical  orthogonal  functions  Monte-Carlo  method  Strom-event  sequences Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : It is impossible to know beforehand the planforms of a stretch of beach without being first aware of the maritime climate affecting it. This article describes a procedure for objectively calculating the uncertainty associated with the prediction of the evolution of a stretch of beach in terms of probability. On the basis of oceanographic data records as well as empirical orthogonal functions (EOF), we propose a procedure for the simulation of possible sequences of storm events. Such sequences were then entered as input for a morphodynamic model with a view to the subsequent generation of possible planforms. EOF methodology was then used to estimate the probability of each of the planforms thus generated. The case study presented here is that of the evolution of an initially straight sand beach where a rectangular tapered fill had been constructed. The beach is located upshore of a groin perpendicular to the coastline, and had blocked all longshore sediment transport. For this analysis we used a one-line model with time-dependent boundary conditions and a non-homogeneous diffusion coefficient. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com/