Examinando por Materia "Geomorphology"

Mostrando 1 - 20 de 29
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    Análisis de las causas del carcavamiento en el Municipio de Briceño, Antioquia
    (Universidad EAFIT, 2021) Torres Carrasquilla, Verónica; Gamboa Ramírez, Marco Fidel
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    Análisis de sensibilidad de parámetros geomorfológicos y climatológicos en modelos Lluvia Escorrentía
    (Universidad EAFIT, 2011) Tamayo Maya, Luis Ángel; Urrego Osorio, Juan David
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    Aproximación a las geoformas y los procesos que controlan los fondos del Golfo de Urabá, costa Caribe de Colombia
    (Universidad EAFIT, 2021) Ossa Pérez, Juan Pablo; Vásquez Perdomo, Juan Camilo; Paniagua Arroyave, Juan Felipe
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    Cambios morfológicos históricos en los fondos del prodelta del río Magdalena, sector Bocas de Ceniza, Costa Caribe de Colombia
    (Universidad EAFIT, 2017) Madrid Montes, Diego Alexander; Correa Arango, Iván Darío; Paniagua Arroyave, Juan Felipe
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    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 Mar
    The 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.
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    Comportamiento mecánico de suelos saprolíticos para el diseño de cimentaciones profundas
    (Universidad EAFIT, 2014) Salvá Martorelli, Pedro José; Echeverri Ramírez, Gloria Elena
    Las crecientes exigencias en términos de cargas sobre las cimentaciones en los nuevos proyectos de construcción en el área metropolitana de la ciudad de Medellín, no permiten seguir utilizando las cimentaciones sustentadas en experiencias anteriores, definidas por criterios fundamentalmente empíricos -- Con el fin de atender las nuevas exigencias, en este trabajo se desarrolla una metodología para establecer un modelo de comportamiento mecánico para los materiales de transición de suelos residuales de anfibolitas, que permita comparar y validar, en igualdad de esfuerzos, los parámetros de diseño de cimentaciones profundas obtenidos por varias metodologías -- Los suelos de cimentación, objeto de este trabajo, pertenecen a la transición entre los horizontes IV y III de meteorización de Dearman, caracterizados por su heterogeneidad y presencia de bloques, situación que dificulta la obtención de muestras representativas para ensayos de laboratorio, y se requieren diferentes metodologías para establecer los parámetros de estos suelos como material de cimentación -- Se realizaron ensayos de campo y laboratorio -- La investigación de campo consistió en seis perforaciones con ensayos de penetración estándar, un pozo de muestreo, seis pruebas con presurímetro pre-perforado tipo Menard y cuatro líneas de geofísica con interpretación del perfil de ondas de corte mediante ondas de superficie -- Las pruebas de laboratorio consistieron en identificación física básica a todo el perfil, con ensayos de granulometrías, pesos unitarios, humedad e índices de consistencia; y en el horizonte de meteorización objeto del estudio, ensayos triaxiales tipo CU con medición de presión de poros, corte directo y compresión no confinada
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    Definición de zonas de descarga hídrica por medio de análisis geomorfológico e imágenes térmicas en la cuenca del río Piedras, Jericó-Antioquia
    (2021) Arias Galvis, Santiago; Betancourt Ortiz, Joseph; Uribe Jaramillo, Marcela; Villada Arias, Isabel Cristina
    This is a graduate work looking for the title of geologist, where water discharge zones of aquifers were identified in the Piedras river basin in Jericó-Antioquia; by means of heuristic analysis of thermal images, and geomorphological models such as: slopes, slope orientation, curvatures and lineaments; developed from a digital elevation model with a spatial resolution of 10m. A 3D model was achieved where the internal flows of the watershed were identified in a conceptual way, integrating the discharge zones, lineaments and potential aquifer water recharge zones from the master's work of Isabel Cristina Arias Villada. Finally, a validation of the different discharge zones identified with the mapping of water source points from the first order drainage mapping of the IGAC (Agustin Codazzi Geographic Institute) is carried out.
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    Determinación de factores de seguridad relativos al deslizamiento utilizando la metodología de taludes naturales (MTN) en la zona sub-urbana y urbana del municipio del Carmen de Atrato Chocó
    (Universidad EAFIT, 2023) Waldo Quinto, Francys Yadilson; Prieto Salazar, Jorge Alonso
    This work presents the zoning of an area of the municipality of Carmen de Atrato through safety factors related to landslide considering the time categories: long, medium and short term, facilitating the analysis and zoning of risk and threat, using the slope methodology. natural resources (MSN), which requires only geology and topography as main inputs. The MSN provides a series of geomechanical and stability parameters for the determination of zones through the safety factor relative to landslide, which we herein call the landslide susceptibility index, in order to offer a practical tool in the generation of preliminary information in relation to the geomechanical parameters of the study area for engineering projects related to the field of geotechnics. The present work covers the following aspects for the determination of the safety factors related to the Fsr slide: a) Measurements of the slope families, b) Construction of the triangular pattern at the population level, c) Calculation of the basic friction angle, d ) Calculation of the envelopes for the calculation of geomechanical parameters of the delimited area, e) Calculation of safety factors related to the Fsr landslide, f) Risk zoning through the construction of isovalue maps. Finally, it is obtained that the basic friction angle obtained corresponds to that expected for this type of materials, for the relative safety factors the isovalue maps are presented, however, a better estimate of the possible occurrence of future events could be to implement a model considering precipitation up to 30 years and earthquakes for different return periods. It is important to remember that relative safety factors reflect past history, but do not take into account future triggering events. The inclusion of these triggers allows for a better estimate of the future probability of landslide failure. However, the calculation of the stability parameters presented in this work corresponds to a preliminary approach to the landslide susceptibility in the analyzed area, as well as the resistance parameters of geomaterials which are useful in civil engineering projects.
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    El colapso ambiental del mayor delta de la Costa Pacífica Suramericana, río Patía, Colombia: variaciones morfológicas y alteraciones en los ecosistemas de manglar
    (Universidad EAFIT, 2014) Parra Ruiz, Adriana Sofia; Restrepo Ángel, Juan Darío; Instituto Nacional para el Desarrollo de la Ciencia y la Tecnología "Francisco José de Caldas"
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    Identificación de superficies de rotura en laderas sobre suelos residuales mediante sondeos eléctricos verticales
    (Universidad EAFIT, 2013) Parra Vargas, Carlos Eduardo; Echeverri Ramírez, Gloria Elena
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    Identificación de taludes susceptibles a deslizamiento por medio de la Metodología de Taludes Naturales (MTN) para un caso de estudio : vereda el Vallano, sector astilleros, municipio de Envigado, departamento de Antioquia, Colombia
    (Universidad EAFIT, 2024) López Alarcón, Ferney Andrés; Prieto Salazar, Jorge Alonso
    This research evaluated the susceptibility to landslides using the Natural Slopes Methodology (MTN), in order to identify the stability of the terrain in critical areas of the El Vallano village, Astilleros sector, Municipality of Envigado, Antioquia. The research, of a descriptive and applied nature, used the MTN proposed by Tomás Shuk, which correlates geomorphological parameters such as height and length of slopes to estimate their stability in complex terrain and with limited primary information. The study showed a progressive deterioration in the stability of the slopes, with an increase in the number classified as high susceptibility over long time horizons. This pattern is attributed to factors such as erosion, soil saturation, climatic variations and unregulated human activities. Likewise, due to uncontrolled runoff, which has been linked to previous surface landslides. Based on these findings, slope stabilization in Vereda El Vallano requires a comprehensive approach that combines advanced technical solutions and principles of environmental sustainability. The proper management of surface and subsurface water emerges as a fundamental pillar, highlighting the use of strategically located drainage systems and bioengineering techniques, such as the incorporation of phytoremediation species and living barriers. These measures not only reduce soil saturation and strengthen its shear resistance, but also contribute to mitigating the risks associated with landslides, promoting long-term geotechnical stability.
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    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 Mar
    Introduction 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.
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    Introducción al problema de la erosión litoral en urabá (sector arboletes-turbo) costa caribe colombiana
    (Instituto de Ivestigaciones Marinas y Costeras-INVEMAR, 2004-01-01) Correa I.D.; Vernette G.; Universidad EAFIT. Departamento de Geología; Ciencias del Mar
    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 km2, 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.
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    Inventario detallado para la gestión y conservación de los recursos geológicos y geomorfológicos entre los municipios de Belmira y Entrerríos, Antioquia, Colombia
    (Universidad EAFIT, 2016) Ramírez Calderón, Miguel Ángel; Marín Cerón, María Isabel; Tavera Escobar, Miguel Ángel
    Geological inventories are an essential tool for knowledge and appropriation of geological resources of a particular region -- In this project is proposed the application of a methodology for identifying, cataloging, and georeferencing of -geosites in the Central Cordillera of Colombia, specifically in the region of Belmira and Entrerríos municipalities -- This is a region that integrates high and middle mountain systems -- It aims to create an input for management and decision making locally
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    Modelo cronoestratigráfico para el emplazamiento de los depósitos de vertiente en el Valle de Aburrá.
    (Universidad Nacional de Colombia, 2006) Rendón G., Diego Armando; Toro V., Gloria Elena; Hermelin Arbaux, Michel; Universidad EAFIT. Departamento de Geología; Diego Armando Rendón G. (drendong@eafit.edu.co); Gloria Elena Toro V. (gtoro@eafit.edu.co); Michel Hermelin Arbaux (hermelin@eafit.edu.co); Geología Ambiental e Ingeniería Sísmica (GIGAI)
    This paper presents new stratigraphic and chronologic data related with a widespread and complex sequence of slope deposits located at "El Poblado" sector, southeast area of the Medellín City, and Envigado County. Geomorphologic cartography, stratigraphic work in civil excavations, and fission track ages of interbedded volcanic ash deposits let us to divide the slope deposits in at least four stages: I, II, III, and IV. Such slope materials, mainly mud and debris flows, present a staircased distribution (telescopic). The oldest deposits, stages I and II, crop out on the middle and higher parts of the slope; while the younger ones, stages III and IV, show wide and nicely preserved fan shape over slope foothills. The oldest ages found in volcanic zircons (obtained around 30 m depth) reach 2.63 Ma, Early Pliocene, representing the maximum age of stage I, which lower age is approximately 1.8 Ma. Stage II has a wide thickness range, and ages between 2.0 and 0.9 Ma, Late PliocenePleistocene. Finally, behind deposits belonging to stage III, other authors report peat layers with ages beyond of the application time span of C14 method (older than 40k.a.). In addition, several basement zircons were found in the deposits, with ages between 45 and 48 Ma.
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    Morphotectonic analysis of the Combeima river watershed
    (Universidad EAFIT, 2019) Jaramillo Mesa, Maria Del Pilar; Marín Ceron, María Isabel