Evolution of Sandspits Along the Caribbean Coast of Colombia: Natural and Human Influences
Por:
Anfuso, G., Rangel-Buitrago, Nelson, Correa Arango, Ivan Dario
Publicada:
1 ene 2015
Resumen:
This work deals with the evolution of Bocas de Ceniza-Puerto Caiman,
Galerazamba, Isla Cascajo and Punta Canoas coastal sectors, located
along the 120 km-long coastline between the Magdalena River mouth and
Cartagena de Indias, on the Caribbean coast of Colombia. Comparisons of
coastline morphology from reliable ancient charts, modern bathymetric
surveys and remote sensing data, show major changes (in some cases at
kilometre-scale) related to the rapid erosion and formation of offshore
sandy shoals, spits and beaches. These sediment bodies are linked to
sediment supply from the Magdalena River. In 1935, after the emplacement
of two jetties at the river mouth, sediment was channelled offshore and
erosion ensued on the western part of the Magdalena delta. Spits and
sandy shoals rapidly migrated down drift. As a result, a spit at Puerto
Colombia - present on the 1935 and 1947 aerial photograms -
progressively diminished and merged with the coastline between 1953 and
1959. South of this location, a new spit formed before 2000 and it
presently shelters a marina at Puerto Velero.
At Galerazamba, a 5 km-long spit at a high angle to the coastline, was
present until 1864. It was replaced by a new spit, broadly parallel to
shoreline, at some point before 1947. This feature was much smaller than
the one previously observed and it has migrated down drift until the
present. High rates of accretion were also observed around Isla Cascajo,
a rocky island that caused the development of a rapidly growing tombolo.
At Punta Canoas, a spit formed between 1947 and 1961 and, then migrated
southwards.
Filiaciones:
Anfuso, G.:
Univ Cadiz, Fac Ciencias Mar & Ambientales, Dept Ciencias Tierra, Poligono Rio San Pedro S-N, Cadiz 11510, Spain
Univ EAFIT, Area Ciencias Mar, Medellin, Colombia
Rangel-Buitrago, Nelson:
Univ Atlantico, Programa Fis, Fac Ciencias Basicas, Barranquilla, Atlantico, Colombia
Correa Arango, Ivan Dario:
Univ EAFIT, Area Ciencias Mar, Medellin, Colombia
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