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handle: 10272/11076 , 10261/49151
[EN]: Following the maximum Flandrian Transgression (6,900 yr. B.P.), the original coastline, with wide promontories and estuaries, underwent considerable straightening out. This was due mainly to the intense littoral dynamics, causing retreat of the capes and progradation in the inlets. Measurement of recent rates of coastal advance-retreat have been possible thanks to the number of XVIth-XVIIth century watchtowers situated on the shoreline, and to geomorphological mapping and radiometric dating of the littoral sedimentary formations (Doñana). An area of maximum retreat has been identified (at the Asperillo tower) averaging around 1.2 m/yr in the last 240 years, and an area of maximum progradation (Doñana), averaging up to 2-4 m/yr for the last 1,800 years and 1.05 m/year in the last 200 years. The natural evolution of this coastal stretch shows a tendency for the erosive-sedimentary poínt of inflexion to move eastwards, as shown by the different erosive and sedimentar y landforms of the area.
[ES]: A partir del inicio de la transgresión Flandriense hasta la actualidad, en todo el ámbito del Golfo de Cádiz, ha tenido lugar una importante e intensa retrogradación costera en los salientes continentales así como una fuerte progradación en los entrantes. Los estudios morfosedimentarios más recientes, realizados en las costas españolas, demuestran que un porcentaje significativo de estas tasas de erosión-depósito litorales están controladas, a largo plazo, por el factor tectónico y, a corto plazo, por la dinámica marina (Zazo et al., 1990). Siendo especialmente, en los últimos siglos, la actividad antrópica un factor esencial.
Este trabajo ha sido subvencionado por el proyecto de la DGICYT PB94-1090-C03-01 y por el II Plan Propio de Investigación de la Universidad de Huelva. Es una contribución al proyecto 367 del IGCP.
3 páginas,2 figuras, 6 referencias.-- 21ª Sesión Científica, Huelva, 1996.
Peer reviewed
Erosion-sedimentation rates, Cádiz Gulf, Coastal geomorphology, Shoreline change
Erosion-sedimentation rates, Cádiz Gulf, Coastal geomorphology, Shoreline change
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