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Predicción de los cambios en el perfil de playa utilizando parámetros adimensionales sencillos

Authors: Jiménez Quintana, José Antonio; Sánchez-Arcilla Conejo, Agustín; Valdemoro Garcia, Herminia;

Predicción de los cambios en el perfil de playa utilizando parámetros adimensionales sencillos

Abstract

En este artículo se analiza el comportamiento de una serie de parámetros adimensionales para la predicción de los cambios en el perfil de playa debido al transporte transversal. El análisis se hace tanto desde el punto de vista cualitativo (aparición de erosión y/o creación) como desde el punto de vista cuantitativo (magnitud de los cambios). Se ha utilizado un conjunto de datos obtenidos en diferentes experimentos a gran escala, por lo que las condiciones del test pueden considerarse próximas a las que nos podemos encontrar en la naturaleza. Se observa que para predecir el tipo de evolución del perfil no hace falta utilizar estimadores que incluyan la pendiente de la playa como variable, siendo en este caso los parámetros P (Dalrymple) y D (Dean) los que mejor porcentaje de acierto presentan. Sin embargo, si se quiere estimar un orden de magnitud de los cambios sufridos por el perfil hay que utilizar parámetros que incluyan la pendiente inicial del perfil (definida como la relación entre la profundidad de rotura y el ancho de la zona de rotura, siendo un indicativo del tamaño de la zona donde se disipa la energía del oleaje en el proceso de rotura). Por último se propone la utilización de un parámetro que combina la capacidad del parámetro de Dean para predecir el tipo de evolución del perfil y que incluye la pendiente como factor normalizador para estimar la magnitud de los cambios. Este estimador es el que mejor explica, para el conjunto de datos utilizados, los cambios de volumen observados.

In this paper the perfomance of a set of dimensionless parameters used to predict beach profile changes due to cross-shore transport is analysed. The analysis has been done from the qualitative (presence of erosion and accretion) and quantitative (magnitude of the changes) standpoints. Several data sets obtained in large scale experiments have been used to make the test under conditions near the field ones. To predict the type of the change, parameters excluding the beach slope show the best perfomance, being the P (Dalrymple) and D (Dean) parameters the best ones. However, if the magnitude of the changes is required, parameters including the beach slope (defined as the ratio between breaking depth and surf zone width) as variable must be used. The use of a parameter which combines the ability of the Dean number to predict the type of change and which includes the beach slope to estimate the magnitude of the changes is proposed. This parameter is the best predictor of the observed beach profile changes for the used data set.

Country
Spain
Keywords

marítima i sanitària::Ports i costes, sedimentos litorales, Àrees temàtiques de la UPC::Enginyeria civil::Enginyeria hidràulica, :Enginyeria civil::Enginyeria hidràulica, marítima i sanitària::Ports i costes [Àrees temàtiques de la UPC], morfología, erosión, playas, Àrees temàtiques de la UPC::Enginyeria civil::Enginyeria hidràulica, marítima i sanitària::Ports i costes, Beach erosion, Platges -- Erosió, oleaje

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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