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Copyright of REDER: Revista de Estudios Latinoamericanos sobre Reducción del Riesgo de Desastres is the property of Corporacion Gestion de Riesgos y Desastres (GRID-Chile) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista de la Asociación Geológica Argentina is the property of Asociacion Geologica Argentina and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tecnura is the property of Tecnura and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ciencia e Ingenieria Neogranadina is the property of Ciencia e Ingenieria Neogranadina and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Cuaderno Activa is the property of Tecnologico de Antioquia, Institucion Universitari and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ciencia e Ingenieria Neogranadina is the property of Ciencia e Ingenieria Neogranadina and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Avances: Investigación en Ingeniería is the property of Universidad Libre, Facultad de Ingenieria and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this research paper assessed the susceptibility of the terrain before mass movements in the microbasin of the Timbío River - Cauca, using a mixed methodology based on surveys, interviews, structuring of cartographic information and spatial modeling with the bivariate method. The main results of the research indicate that high levels of susceptibility are distributed throughout the microbasin, and for the period between 2012-2018, mass movements were registered that have caused structural and environmental damage. the results obtained in the research constitute a base input to strengthen the planning processes, thus directing the actions of the community and institutions towards local risk management. [ABSTRACT FROM AUTHOR]

Copyright of Geominas is the property of FUNDA-GEOMINAS. (Fundacion de Egresados d Amigos de la Escuela de Ingenieria Geologica y de Minas) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The inventory and analysis of historical disasters records is an initial and fundamental element for risk assessment and the formulation of new disaster risk management measures. This work compiles and analyzes the occurrence of disasters caused by natural phenomena during 2018 in Colombia, specifically in the department of Antioquia, taking the DesInventar disaster inventory as the main source of data. Altogether during the 2018, 265 disasters were registered in the department, where 210 correspond to natural hazards: mass movements, debris flows, floods, forest fire and hydrometeorological events that caused 80% of the victims. The results indicate that mass movements and debris flows still are the most frequent and tragic phenomena for the region, these are mainly triggered by rain. Finally, it is important to highlight the effect that human activities have as determining or triggering factors in phenomena like mass movements and forest fires. [ABSTRACT FROM AUTHOR]

Landslides triggered by rain have caused many human and economic losses in Colombia, especially in the department of Antioquia. According to DesInventar database since 1900 until 2017, 3478 landslides were recorded in the territory of Antioquia and these have left over 2065 fatalities and 74654 damaged homes. This paper presents spatial and temporal rainfall variability and their relationship with historical landslides events under the influence of ENSO in the nine sub-regions of Antioquia. For this purpose, daily rainfall data obtained from 27 IDEAM weather station and 5368 landslides reported in SIMMA and DesInventar database were used in a time window analysis between 1985 and 2016 (32 years). Also, temporal analyses and correlations were performed in daily, monthly and annual scale. According to the results of this study, the occurrence of landslides exhibits bimodal behavior according to temporal rainfall variability, and the strong effect of the cold phase of the ENSO (La Niña) has a strong influence on them. Moreover, landslides showed significant sensitivity to the time-series of rainfall linked to the different sub-regions of Antioquia. The understanding of spatial-temporal rainfall variability in tropical mountains environments is a key element for an appropriate risk management and early warning system implementation and design for hydro-meteorological hazards. [ABSTRACT FROM AUTHOR]

Although in the literature there are several methods for the determination landslide susceptibility, very few consider the particularities of linear projects. In the present work, it is proposed the combination of heuristic, statistical and physically based modeling methods to evaluate and mapping landslide susceptibility in linear projects, considering regional and local scales. For the regional zoning, the conditional analysis method using Unique Condition Unit (UCU) is proposed, and for local scale physical models: SHALSTAB for soil slopes and the TOBIA index for rock slopes. The validation of the methodology was performed by the area under the curve (AUC) method. The result indicates an adequate performance, and the obtaining of valuable information prior to the construction of the project, but also during the operation, allowing to define sectors of special attention considering the scale of the project. [ABSTRACT FROM AUTHOR]

This paper analyzes an episode of 36 mass movements triggered during the 1888 blizzard. In the Asturian Massif this blizzard consisted in four consecutive snowstorms that happened between 14th February and 8th April 1888, generating snow accumulations with a depth ranging 2-9 m. Historical documents, fieldwork and testimonies to the contemporary residents, have allowed to reconstruct this episode; in 27 events the typology of movement has been defined, and the landslide was the most common one. Several factors as the lithology of the substratum, the steep topography of the Asturian Massif high areas, and ground alterations because of the anthropic action, were the main determinants. Nevertheless, the water supplies originated from the snowmelt seems to be the main causal agent of this episode, in which 28 events were responsible for material damage as well as great delays in communications, and one rockfall caused the death of one person. [ABSTRACT FROM AUTHOR]

Slope stability is usually affected by factors that reduce soil strength and increase driving forces acting on the slope material, sometimes generating mass movements. Among these factors, vegetation has an important role related to hydrological (e.g. evapotranspiration and infiltration) and mechanical (e.g. tree surcharge and root reinforcement provided by trees) mechanisms. In this review, vegetation influences associated to slope stability are identified, describing the mechanisms involved in the occurrence of mass movements. Finally, the way these factors affect slope stability is explained according to soil properties, climatic conditions and environmental characteristics. [ABSTRACT FROM AUTHOR]

Colombia has different geographical, geological or geomorphological, among others, that showing areas of major and minor stability of the earth's surface; where we found areas of high landslide susceptibility of high impact and frequency. In this way, the project began collecting and studying various methodologies for recognized and interpretation landslides; we integrate them with the earth observation technologies, this is used for analysis and generation of pattern from remote sensing images. After evaluating different geodynamic instability areas, the pilot area was delimited in the Antioquia's Department; therefore, we searched inputs used for the analysis, considering use images of medium and high resolution, such as: SPOT 5, RapidEye and Ultracam-Vexcel. Once established pictorial-morphological criteria, were tested, locating and characterizing different types of landslides, in order to evaluate the strengths and needs added for modeling landslides patterns for satellite images and airborne. [ABSTRACT FROM AUTHOR]

This study aims to show the importance of Landslide Susceptibility Map as a tool for land use planning, prevention and risk mitigation. This will be shown through MM evaluation processes affecting high sector of El Paraíso gorge - Villa María del Triunfo (Lima - Peru). The work consisted of two phases: in the first one (field) the intrinsic characteristics of geology and geomorphology were identified. The second one, included the Landslide Susceptibility Map generation, using the multivariate Heuristic Model consisting of overlapping maps variables (Carrara et al. 1995, Lain et al. 2005), developed in a GIS environment through algebra layer (geoprocessing operations). The results of Landslide Susceptibility Map in general, give us geoscience information that will contribute to land management, and in a timely manner, with the development of specific studies, prevention and / or mitigation measures to ensure the physical stability of identified critical areas. [ABSTRACT FROM AUTHOR]

Mass movements are the product of a progressive reduction of strength of slope geomaterials by human actions or natural processes, such as weathering, and triggered by external factors like rainfall or earthquakes. These events have demonstrated throughout history its destructive capacity, causing huge human and economic losses, especially in tropical and mountainous terrains, such as the Aburrá Valley. For this reason new studies on rainfall forecasting, real-time monitoring and the definition of critical rainfall thresholds have become essential tools for the implementation of early warning systems. This analysis of critical rainfall thresholds for landslides forecasting in the Aburrá Valley was performed by an empirical procedure, using a database of mass movements and a database of precipitation with 15-min temporal resolution. Accumulated rainfall for every mass movement was estimated for short-term --LA-- (1, 3, 5 and 7 days) and long-term --LAA-- (5, 10, 15, 30, 60 and 90 days). The results show that the major determinant for the occurrence of mass movements in the Aburrá Valley is the LAA. The data indicate that mass movements used in the analysis occurred for LAA over 60 mm for 30 days, 160 mm for 60 days and 200 mm for 90 days. However, it is necessary to evaluate in detail this type of analysis and thresholds, widely performed in the world, clearly influenced, due to they generally do not consider those rainy days when there were no mass movements. Therefore further studies should be carried out based on analysis of rainfall series and exceedance probabilities. [ABSTRACT FROM AUTHOR]

Copyright of Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales is the property of Academia Colombiana de Ciencias Exactas, Fisicas y Naturales and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)