Examinando por Autor "Correa-Arango, Ivan D."
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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 MarThis 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 worksÍtem Base de datos espacial geomorfológica de la franja litoral de los departamentos de Antioquia y Chocó(Universidad Nacional de Colombia, 2012-08-22) Prüssmann Uribe, Johanna; Correa-Arango, Ivan D.; Universidad EAFIT. Departamento de Geología; Ivan D. Correa-Arango (icorrea@eafit.edu.co); Johanna Prüssmann-Uribe (jprussmann@eafit.edu.co); Ciencias del MarCon el objetivo de generar información esencial para el manejo integrado y el desarrollo sostenible de la franja litoral Caribe de los departamentos de Antioquia y Chocó, se creó una base de datos espacial llamada GEOURABÁ, que recopila la información geomorfológica a escala 1:10000 de los 600km del contorno costero de esta zona, a partir de la fotointerpretación y restitución de una ortofoto de la zona tomada en el año 2009. La estructuración de GEOURABÁ consideró la inclusión de 18 geoformas costeras, las cuales fueron divididas entre aquellas que están asociadas a procesos morfogenéticos depositacionales (costas bajas) y aquellas a procesos erosionales (costas rocosas). A partir del análisis de la distribución espacial de dichas geoformas, la zona de estudio fue dividida en seis sectores según las características geomorfológicas predominantes en cada uno, de los cuales tres están asociados a procesos depositacionales y tres a procesos erosionales. En esencia, el diseño y la estructuración de GEOURABÁ se realizaron a través de los siguientes pasos: a) Definición de coberturas a cartografiar; b) Diseño del Modelo Lógico; c) digitalización de coberturas; d) Cálculo de coberturas relativas; e) Asignación de Atributos; f) Diseño de reglas topológicas; g) Estructuración de Geodatabase bajo Modelo Físico; h) Diseño de salidas de productos cartográficos. En total se cartografiaron 52882 ha de territorio emergido, donde las llanuras aluviales y las colinas fueron las geoformas más predominantes (57,18% y 19,37%, respectivamente). Ecogramas de los fondos y subfondos marinos del Golfo de Urabá revelan mayores pendientes en el costado occidental que en el costado oriental, además de otras geoformas sumergidas, como plataformas, escarpes, antiformas y diapiros. GEOURABÁ procura brindar a los entes y personas relacionados con la gestión de los recursos naturales de la zona, una contextualización de la espacialidad de los tipos de costa que se presentan en la zona de estudio y las geoformas que lo componen. Con esto se pretende contribuir a la generación de un mejor entendimiento de los diferentes factores que regulan los procesos de erosión/depositación y la vulnerabilidad de la zona frente a posibles eventos relacionados con el cambio climático global.Ítem Coastal erosion and village relocation: a Colombian case study(Elsevier, 2000-01-01) Correa-Arango, Ivan D.; Gonzales, Juan Luis; Universidad EAFIT. Departamento de Geología; Ivan D. Correa-Arango (icorrea@eafit.edu.co); Ciencias del MarBecause of its tectonic setting, the Paci"c coast of Colombia is subject to a variety of geological hazards, including earthquakes, tsunamis and associated phenomena such as regional and local coastal subsidence, #ooding and soil liquefaction. Erosional trends are prevalent along much of the 700 km long, low barrier island's shorelines of the Paci"c littoral and land losses are enhanced by factors such as 30 cm regional sea level rises associated to the occurrence of El Nin8o. Marine erosion is threatening more seashore littoral villages and worsening the already di$cult socioeconomic conditions of most part of the inhabitants. Because of diverse and strong motivations to stay near the sea, the responses of barriers island's inhabitants to marine erosion has consisted in most cases of repetitive in-shore and along-shore directed relocations of villages, rather than de"nitive abandonment of the islands. In the long run, this procedure only has postponed the problem and led to repetitive relocations and economical losses. The recent inland relocation of El Choncho village, on the San Juan River delta, illustrates a di!erent response to marine erosion. Although a new along-shore relocation was physically possible, inhabitants decided to abandon the barrier island and migrate to an interior, ancient beach ridge complex, applying a prudent solution which will be the most appropriate for other threatened villages of the Paci"c littoral. A detailed geomorphologic mapping program must be conducted in order to identify appropriate sites for inland relocation of existing villages on the barriers islands of the Colombian Paci"c coast. ( 2000 Elsevier Science Ltd. All rights reserved.Ítem Combined beach - inner shelf erosion in short and medium term (Maspalomas, Canary Islands)(Faculty of Geology, Martí i Franquès, 2012-12-01) Fontán, A; Alcántara-Carrió, J; Correa-Arango, Ivan D.; Universidad EAFIT. Departamento de Geología; Ivan D. Correa-Arango (icorrea@eafit.edu.co); Ciencias del MarThe analysis of the accurate topo-bathymetric digital elevation model (DEM), the cartography of the submarine sedimentary cover and the monitoring of short (seasonal) and medium-term (2000-2009) morphological changes have permitted depicting the erosional trend in the short and medium-term of the Maspalomas sedimentary system. Short-term analysis showed intense sedimentary fluxes between the beaches and the inner shelf, and sedimentary exchanges with other sectors of the inner shelf, while the steep slope inner shelf fronting La Bajeta cape was identified as a sink area. In the medium-term the sediment budget showed high erosion of the supratidal and intertidal sectors of the beaches due to storm waves in the 2005-2006 winter, followed by accretion over the next four years, but which did not reach the initial sedimentary state. The inner shelf and subtidal sector of the beaches showed negative budgets in the short and medium-term. Interannual variability of the wave and wind regimes determines decadal beach erosion-accretion cycles, while long-term climatic change, evidenced at the study area by a decrease of trade winds and NE wave intensity in 2005, is expected to produce a possible increase of erosion at the El Inglés inner shelf and consequently a decrease in sediment inputs to the El Inglés beach and Maspalomas dune field. Finally, the influence of the geological heritage is depicted by the Fataga gully’s control of the present coastal morphology, and by the island relief control of the wind, waves and current directions in the study area.Ítem Historical and recent shore erosion along the Colombian Caribbean Coast(COASTAL EDUCATION & RESEARCH FOUNDATION, INC., 2005) Correa-Arango, Ivan D.; Alcántara-Carrió, J; González R., D.A; Universidad EAFIT. Departamento de Geología; Ivan D. Correa-Arango (icorrea@eafit.edu.co); Ciencias del MarThe analysis of historical charts, aerial photographs, satellite images and fieldwork provides a general picture of the magnitudes, rates and some of the possible causes of the main shoreline changes occurred along the littoral since 1794 until present. Net littoral accretion took place mostly on localized deltaic zones, but cliff and beach retreat has been by far the dominant trend in this coast, particularly along the coastline to the south of Sierra Nevada de Santa Marta. Data concerning the Guajira Peninsula and Sierra Nevada de Santa Marta shores suggest a coastline retreat of 20-30 m in the last century, while for the southern Caribbean, between the Magdalena delta and the Gulf of Urabá, accurate charts of XVIII-XIX centuries evidence littoral retreat up to 12 km and maximum rates of erosion up to 40 myr-1 at some areas. Shore erosion and consequent flooding along the Caribbean coast of Colombia had induced important land losses, both in non-developed and developed areas, and is impacting severely the infrastructure of all the inhabited littoral sectors. Available data for the most critical areas demonstrates that natural instability and/or pre-existing erosive trends are facilitated by soft lithologies and were dramatically accelerated in the last eight decades by intensive human interventions, including the chaotic building up of hard rock coastal defenses, the diversion of low river courses and the intensive beach and river sand extraction.Ítem Implicaciones del ascenso del nivel del mar sobre los litorales de Colombia(Corantioquia, 2008) Correa-Arango, Ivan D.; Lorduy, Roberto; Universidad EAFIT. Escuela de Ingeniería. Grupo de Investigación Ciencias del Mar; Ivan D. Correa-Arango (icorrea@eafit.edu.co); Roberto Lorduy (rlorduy@eafit.edu.co)Ítem Introducción al problema de la erosión litoral en Urabá (sector Arboletes - Turbo), Costa Caribe Colombiana(Instituto de Investigaciones Marinas y Costeras - INVEMAR, 2004) Correa-Arango, Ivan D.; Vernette, Georges; Universidad EAFIT. Departamento de Geología; Ivan D. Correa (icorrea@eafit.edu.co); Ciencias del MarIntroduction to littoral erosion problem in Urabá (Arboletes-Turbo area) Colombian Caribbean coast. Shoreline retreat has been the net dominant historical trend along the 145 km-length littoral between Arboletes and Turbo (Southern Caribbean of Colombia). For the last four decades, there were identified in this littoral shoreline retreats of about 50-100m in several places (Uveros, Damaquiel, Zapata, Turbo) and a maximun of 1.6 km in the Punta Rey-Arboletes area, where land losses were of 4.5 k m2, at exceptional rates of 40m/year. The synthesis of the available information suggest that the general “susceptibility” to erosion between Arboletes and Turbo could be related primarily to relative sea level rise, associated to tectonic movements as well as to the effects of mud diapirism and hydroisostacy. In the more critical areas (Arboletes, Turbo), the natural erosive trends were accelerated by anthropic actions, including river diversion (Turbo), beach mining, and inadequate (or total absense) practices for controlling residual and natural waters. Up to August 2000, there were invested about $ Col 10.000 billions in 155 engineering defences (groins, sea walls and rip-rap which totalize 6.2 km of total length and a volume of materials of 37.000 m3). With few exceptions, groins have not been successful and are now part of the problem, accelerating shore erosion along the adyacent sectors. In the short term, the littoral erosion between Arboletes and Turbo is caused both by marine and by subaerial factors. It is facilitated by the poor lithological strengths of cliffs and marine terraces, mainly composed of highly fractured and weathered claystones and mudstones (with stratification and weakeness planes dipping toward sea) and nonconsolidated, easily liquefacted, fine sediments; both conditions facilitate the occurrence of rocks falls, slides and mud flows that result in high figures of cliff retreat (3 to 4m), specially during the first 15 days of the summer-winter transition (april) and in high waves periods. The case of the littoral erosion between Arboletes and Turbo illustrates well how the natural erosive trends of an area can be accelerated by human interventions and the urgent need for coordinating efforts to cope with littoral land losses.Ítem Predicción de las magnitudes de retroceso de algunos sectores acantilados de Antioquia en condiciones de ascenso del nivel del mar – Resultados para el sector de Arboletes(Sociedad Colombiana de Ingeniería, 2012-08-08) Paniagua, Juan F.; Correa-Arango, Ivan D.; Universidad EAFIT. Departamento de Ingeniería; Ivan D. Correa-Arango (icorrea@.eafit.edu.co); Juan Felipe Paniagua (jpaniag2@eafit.edu.co); Ciencias del MarSea-level rise related impacts are required for coastal management, especially within littoral fringes with active tectonics and presence of strategic ecosystems likewise Colombian southern Caribbean. “Worst” scenarios predict a sea-level rise for 2100 circa 2 m above level of 1990. Among this context, retreat magnitudes prediction of littoral cliffs of Antioquia, formed along several sectors by soft rocks, is a primary element for medium-large term planning of the region. Considering this, possible shoreline positions along three critical sectors within Antioquia’s coast for 50 years in the future are presented (Arboletes and Turbo towns) and Los Córdobas – Puerto Rey sector (Córdoba department). For the Arboletes sector, considered as the most critical based on population density and present infrastructure, results for 2059 indicate the following: 1) Assuming a constant sea-level rise rate of +2.32 mm/yr (present value), mean shoreline retreat to 2059 would be –64 m. 2) Assuming a sea-level rise rate of +7 mm/yr, mean retreat distances would be about 134 m. 3) Assuming a sea-level rise rate of +22 mm/yr, mean shoreline retreat distances would be 200 m. Mean shoreline retreat distances between 64 and 200 m to 2059 are related to primary magnitude impacts over present infrastructure of Arboletes sector (downtown structures, access roads from Montería and towards Necoclí towns) and also the associated marine inundation of natural drainages, primarily Jobo and Arboletes rivers. Similar results could be shown for the other sectors considered within this studyÍtem Shore erosion between Arboletes and Punta San Bernardo, caribbean coast of Colombia(Universidad Industrial de Santander, 2007-07-02) Correa-Arango, Ivan D.; Ríos, A; González, D; Toro, M; Ojeda, G; Restrepo, L; Universidad EAFIT. Departamento de Geología; Ivan D. Correa-Arango (icorrea@eafit.edu.co); Ciencias del MarThe present morphology and the inventory of the historical shoreline changes (1938-2005) between Arboletes and Punta San Bernardo evidenced a strong erosional trend along 160 of its 180lan tota1-1ength, resulting in the disparition/retreat of numerous beaches, followed by the consequent flooding/erosion of the adjacent littoral terraces and mangrove swamps. In general terms, the littoral Arbo1etes-Punta San Bernardo retreated 30 to 100m during the last seven decades, at rates between 0.5 and 1.5 m/year; maximum values were found at some critical sectors in the Arboletes-Punta Brava shore segment where magnitudes of coastline retreat were in the order of 900-1.500m at erosion rates up to 70 m/year during the period 19601975. Shore erosion in the study area results both from marine and subaerial processes and the combination of geological factors (neotectonism and effects of mud diapirism, minor stocks of sands, relative sea level rise, poor geotechnical characteristics of cliff's rocks) and human interventions (intensive sand mining from beaches and rivers, land uses with inadequate water management practices, adverse effects of groins and other rigid structures of defense). The precise definition of each one of these factors is necessary for planning the development of the area considering the future sea level rise associated to the Global Climate Change.