Methodology for quantitative landslide risk analysis in residential projects

This paper provides a quantitative assessment for the hazard, the vulnerability and the risk associated to slope instability as a tool for urban planners and policy makers. Analysis methodologies and overall numerical procedures are presented in detail. In order to assess a hazard, which is expresse...

Full description

Saved in:
Bibliographic Details
Published in:Habitat international 2016-04, Vol.53, p.403-412
Main Authors: Isaza-Restrepo, Paola Andrea, Martínez Carvajal, Hernán Eduardo, Hidalgo Montoya, Cesar Augusto
Format: Article
Language:English
Subjects:
Economics
Hazard assessment
Landslides
Landslides & mudslides
Mathematical analysis
Mathematical models
Medellin Colombia
Methodology
Residential buildings
Risk analysis
Risk assessment
Slope stability
Urban planning
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper provides a quantitative assessment for the hazard, the vulnerability and the risk associated to slope instability as a tool for urban planners and policy makers. Analysis methodologies and overall numerical procedures are presented in detail. In order to assess a hazard, which is expressed as a temporal probability, FOSM technique was used along with Rosenblueth's point estimate method. Reliability index (β) was used as a standard measure to compare the results assessed with other information presented in published literature for a number of geotechnical projects. Concerning the analysis of vulnerability, a new approach was proposed by combining local methodology for seismic vulnerability designed for buildings in Medellin with generic analysis methodology for vulnerability of people when exposed to landslides. The risk was assessed by a simple mathematical crossing between hazard and vulnerability. A database of 120 residential projects located on natural slopes in the city of Medellin (Colombia) was used for the analysis. The results were presented as FN charts relating the calculated frequency of landslides to the number of potential life or economic losses. •Methodology for quantitative risk assessment of landslides in urban areas.•Probabilistic landslides hazard analysis in Medellin, Colombia.•Criteria for acceptable risk by landslide at a local scale is proposed.•FN charts were used to present the results of risk calculations of 120 projects.•Vulnerability is a sum of combined effect of physical, social, economic indicators.
ISSN:0197-3975
1873-5428
DOI:10.1016/j.habitatint.2015.12.012