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Geosciences 2018, 8(8), 294; https://doi.org/10.3390/geosciences8080294

Combining Social Vulnerability and Physical Vulnerability to Analyse Landslide Risk at the Municipal Scale

Centro de Estudos Geográficos, IGOT-Universidade de Lisboa, 1600-276 Lisboa, Portugal
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Received: 30 June 2018 / Revised: 27 July 2018 / Accepted: 30 July 2018 / Published: 7 August 2018
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Abstract

In this work residents’ social vulnerability and buildings’ physical vulnerability of the Loures municipality (Portugal) were combined to locate the areas where the vulnerability is the highest, and to analyse the landslide risk. The social vulnerability of Loures was assessed using the Geographic Basis for Information Reference (BGRI) terrain units by combining sensitivity and lack of resilience based on the population and housing Census 2011 data. The physical vulnerability was assessed in a previous study based on an inquiry of a pool of European landslide experts and a sub-pool of landslide experts who know the study area. A matrix approach was used to cross the classes of the social and physical vulnerabilities. Finally, the landslide risk was analysed for each terrain unit considering the combined vulnerability, the buildings’ economic value and the landslide susceptibility for a specific landslide magnitude (3-metre-deep rotational slide). Results show that 0.9% of the population reside in the area of the municipality where 75% of the future landslide should occur, and 0.8% of the buildings of the municipality—which represent a value of EUR 146,170,000—are also located in this dangerous area. This approach is reproducible: the risk analysis can be applied for another magnitude scenario in Loures, and the combined vulnerability can be assessed in any Portuguese municipality thanks to the availability of the data. View Full-Text
Keywords: social vulnerability; physical vulnerability; combined vulnerability; landslide risk analysis social vulnerability; physical vulnerability; combined vulnerability; landslide risk analysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Guillard-Gonçalves, C.; Zêzere, J.L. Combining Social Vulnerability and Physical Vulnerability to Analyse Landslide Risk at the Municipal Scale. Geosciences 2018, 8, 294.

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