Examinando por Autor "Rangel-Buitrago, Nelson"

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    Ítem
    Assessing and managing scenery of the Caribbean Coast of Colombia
    (Elsevier, 2012-05-18) Rangel-Buitrago, Nelson; Correa-Arango, Ivan D.; Anfuso, Giorgio; Williams, Allan T.; Ergin, Aysen; Universidad EAFIT. Departamento de Geología; Ivan D. Correa-Arango (iarango@eafit.edu.co); Ciencias del Mar
    This study provides the coastal scenery assessment of 135 sites along the Colombian Caribbean littoral by analysing 26 physical and human factors. Sites were categorised into five classes from Class 1, top grade scenery, to Class 5, poor scenery -- Fifty five percent of the investigated coastal areas were included in Classes 1 and 2, 18% belonged to Class 3 and 47% of the sites fall into Classes 4 and 5 -- Classification of analysed sites depends on the geological setting and the degree of human occupation -- Classes 1 and 2 sites are located in natural protected areas in La Guajira and Magdalena departments -- Low classification recorded at Classes 3, 4 and 5 corresponds to a progressive decrease of both natural and (especially) human parameters -- Concerning coastal management issues, emphasis should be given to the upgrading of human parameters eliminating litter and sewage evidences, vegetation debris and enhancing beach nourishment works
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    Ítem
    Evolution of Sandspits Along the Caribbean Coast of Colombia: Natural and Human Influences
    (SPRINGER-VERLAG BERLIN, 2015-01-01) Anfuso, G.; Rangel-Buitrago, Nelson; Correa Arango, Ivan Dario; Universidad EAFIT. Departamento de Geología; Ciencias del Mar
    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.