Examinando por Materia "Landslides"
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Ítem Comparación entre los métodos heurístico, estadístico univariado y estadístico bivariado, para la zonificación de amenazas por movimientos en masa a escala 1:25.000 en el municipio de Santa Bárbara, departamento de Antioquia(Universidad EAFIT, 2015) González Gómez, Milena; Gamboa Ramírez, Marco FidelÍtem Correlation of Morphometric Variables for Landslides in the Combeima River Basin, Colombia(Universidad EAFIT, 2020-06-19) Santa-Ramírez, Gabriel; Cuevas-González, Juan; Leal-Villamíl, Julián; Muñoz-Ramos, Jader; Universidad del TolimaThis study was carried out in order to estimate the morphometric variables of the landslides found in Combeima river basin (Tolima, Colombia) and obtain possible statistical correlations. To obtain the morphometric characteristics of the landslides, we used a database with historical landslides, a RapidEye image from 2010 and an orthophotomosaic from 2009, where the landslides were visually identified. The morphometric characteristics were defined through a geographic information system and bivariate analyzes were ran between the morphometric variables to establish their correlations. The results allowed to identify 121 landslides, with an average area of 1,974.97 m2 and Birnbaum-Saunders type distribution. It was found that the slip area morphometric variable correlates with the total length (R2=0.9414), the length of the center line (R2=0.9368) and the width of the surface of rupture of this (R2=0.8915). These data could be used to infer the volume of the mass involved in the event and its potential effects . This result would allow the landslide area to be used as support in decision-making in the planning of the territory in the Combeima river basin.Ítem Evaluación de métodos heurísticos y estadísticos para zonificación de amenazas por movimientos en masa a escalas intermedias(Universidad EAFIT, 2021) Gamboa Ramírez, Marco Fidel; Bedoya Sanmiguel, Oscar GeovanyÍtem Influence of the ENSO on the spatial and temporal variability ocurrence of landslides triggered by rain in the Andean region(Universidad EAFIT, 2019-06-04) Naranjo Bedoya, Karolina; Aristizábal Giraldo, Edier Vicente; Morales Rodelo, José Alfred; Universidad Nacional de ColombiaÍtem Prediction of landslide occurrence in urban areas located on volcanic ash soils in Pereira, Colombia(Springer Verlag, 2004-01-01) Rios, D.A.; Hermelin, M.; Rios, D.A.; Hermelin, M.; Universidad EAFIT. Departamento de Ciencias; Geología Ambiental y TectónicaAs a result of the 25 January 1999 Armenia earthquake, the city of Pereira (400,000 inhabitants), located on a volcanic ash-covered alluvial fan in the western limit of the Central Cordillera (Colombia), suffered 250 slope movements. After a complete inventory, a monitoring process of unstable areas was designed, based on repeated topographic surveys, soil pore saturation levels and visual inspections. The participation of the communities was crucial and permitted the prediction of slope movements between 2 weeks and 3 months in advance and the evacuation of the inhabitants. Three specific examples are discussed. The method could be improved by excavating observation trenches and observing in detail local rainfall. In all cases, the strong involvement of the community was considered indispensable for the success of the process. © Springer-Verlag 2004.Ítem Zonificación de amenaza por movimientos en masa para el municipio de Támesis, en el área rural a escala 1:25.000 y en el área urbana a escala 1:2.000(Universidad EAFIT, 2015) Guisao Granda, Yadiris Andrea; Gamboa Ramírez, Marco Fidel