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handle: 10261/319454 , 10508/1501
Este trabajo pretende una descripción morfométrica de las barras intermareales para distinguir entre las asociadas a perfiles disipativos y las asociadas a perfiles reflectivos, profundizando más en las primeras en cuanto a estructuras internas y migración. El litoral estudiado se sitúa entre las ciudades de Chipiona y Rota (suroeste de la península Ibérica). Las playas disipativas presentan pendiente muy suave (2 %) y anchura de aproximadamente 120 m; las reflectivas tienen pendiente media del 5 % y anchura en torno a 90 m. Se ha encontrado que las barras asociadas a perfiles reflectivos son de mayores dimensiones que las asociadas a perfiles disipativos. Aquéllas son convexas y tienen una elevada pendiente en su lado hacia el mar (9°) y una pendiente menor en el lado hacia tierra. Las últimas presentan una amplia y aplanada cresta, el lado hacia el mar tiene una pendiente de 2°-3° y el lado hacia tierra de 1°-2°. Sus estructuras internas están constituidas por láminas paralelas a la superficie.
The present paper deals with morphometric bar characteristics, to discriminate between bars that are associated with dissipative beaches and reflective ones. We shall focus on the former: their internal structures and migration rate. The beaches studied are located between the cities of Chipiona and Rota (southwest Iberian Peninsula). Dissipative beaches have a gentle slope (2 %) and are 120 m wide; moderately reflective beaches have a 5 % slope and are 90 m wide. We found that bars associated with reflective beaches are larger than those associated with dissipative beaches. On the reflective beaches, bars are convex upwards, with a seaward slope of 9° and a landward slope of 5°. On the dissipative beaches, bars have a wide, smooth crest, a seaward slope of 2°-3°, and a landward slope of 1°-2°. They are generally composed of thin sets of plane bedding laminae, parallel to the beach surface.
Instituto Español de Oceanografía
playa disipativa, Barras intermareales, playa reflectiva, Medio Marino
playa disipativa, Barras intermareales, playa reflectiva, Medio Marino
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