Examinando por Materia "VALLE DE ABURRÁ"

Mostrando 1 - 2 de 2
  • Miniatura
    PublicaciónAcceso abierto
    Influencia de la vegetación en los niveles de ruido urbano
    (2013-11-26) Posada-Posada, M. I. (Martha Isabel); Arroyave-Maya, M. P. (Maria del Pilar); Fernández-Ossa, C. E. (Carlos Eduardo)
    The objective of the study was to assess the capacity of vegetation to reduce the noise in the Aburrá valley. The methodology comprised two phases: the first was the revision of secondary information related to the role of vegetation and to obtain the conceptual bases for further experimental development. The second phase was the measurement of noise levels 10 m from the sound source (high traffic road) in urban public green zones with different plant coverage (tree, shrub, and a mixture of trees and shrubs) and without vegetation. Results showed no significant differences between the sites with and without vegetation, allowing us to infer that under conditions of the study, characterized by having few individuals of trees and shrubs dispersed, the vegetation does not play a significant role in reducing noise. Therefore, for its control in urban areas measures other than the planting of trees must be taken, or wider, longer, denser, and higher live barriers should be established.
  • Miniatura
    PublicaciónAcceso abierto
    Sistema de alerta temprana por movimientos en masa inducidos por lluvia para el Valle de Aburrá, Colombia
    (2013-11-25) Aristizábal, E. (Edier); Gamboa, M. F. (Marco Fidel); Leoz, F. J. (Francisco Javier)
    The complex physical conditions of the Aburrá Valley coupled with high vulnerability levels led to scenarios with a high potential for human and economic losses upon the occurrence of natural phenomena such as mass movements, which represent 35 % of events occurring in the valley and 77 % of dead people. Due to these severe problems, since 2008, an early warning system for rainfall-induced landslides assisted by empirical rainfall thresfolds has been used. Early warning systems provide a rapid means for monitoring and communicating information about threats to a vulnerable community, so they are used primarily to protect lives, noting the possibility of occurrence of an event in advance, providing time to take action that can reduce the risk conditions. This paper describes the definition and model fit as well as presents the results of the validation of thresholds for the period 2004-2008.