Geomorfología y dinámica costera | Geomorphology and coastal dynamics

In Argentine coastal areas, geomorphological changes are directly related to relative continental uplifts and falls and to seaward and landward displacement of the coastline. Accretional and erosional phenomena are produced by displacement of the coastline in horizontal way. The resultant structures can be represented in two principal sectors. Backward motion or retrogradation of about 15 km were estimated for the Strait of Magellan, over an area of 500 km 2.Otherwise, large accretional phenomena were recognized in the north,with a 60 km seaward displacement, equivalent to 4,000 km2 in the last7.000 years. Variation in tidal regime and amplitude is reflected in the coincidence of the boundary between accretion and erosional sectors. Two principal nearshore currents were determined from geomorphological patterns. They occur southerly to 42°S. The nearshore current was northward in the northern sector, and southward in the southern one. Local nearshore circulation cells exist along the coast and sometimes they act against the general littoral drift.

Referencia bibliográfica/Bibliographic reference: Codignotto, J.; 1996. Geomorfología y dinámica costera. En: Boschi, E.E.; ed. Antecedentes históricos de las exploraciones en el mar y las características ambientales. Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero INIDEP, (El Mar Argentino y sus Recursos Pesqueros; 1) p.89-105

Published

morphología costera, erosión costera