Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
doi:10.5194/nhess-2016-408
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
04 Jan 2017
Review status
A revision of this discussion paper is under review for the journal Natural Hazards and Earth System Sciences (NHESS).
Construction of an Integrated Social Vulnerability Index in urban areas prone to flash flooding
Estefania Aroca-Jimenez1, Jose Maria Bodoque1, Juan Antonio Garcia2, and Andres Diez-Herrero3 1Department of Mining and Geological Engineering, University of Castilla-La Mancha, Avd. Carlos III, Toledo 45071, Spain
2Department of Business Administration, University of Castilla-La Mancha, Avd. Real Fabrica de Sedas, Talavera de la Reina 45600, Spain
3Geological Hazards Division, Geological Survey of Spain, 23 Ca lle Rio Rosas, Madrid 28003, Spain
Abstract. Flash floods are considered to be one of the natural hazards with the greatest capacity to generate risk. Therefore, a change in traditional flood risk management (FRM) is necessary towards an integrated approach, which requires a comprehensive assessment of the social risk component. In this regard, integrated social vulnerability (ISV) gives us the spatial distribution, contribution and combined effect of exposure, sensitivity and resilience to the total vulnerability, although these components are often disregarded. ISV is characterized by the demographic and socioeconomic characteristics that condition a population's capacity to cope with, resist and recover from risk, and it can be derived from assessing the Integrated Social Vulnerability Index (ISVI). As far as we know, it has not yet provided a methodological approach to construct the ISVI in urban areas of Castilla y León (northern central Spain, 94,223 km2, 2,478,376 inhabitants) prone to flash flooding. A hierarchical segmentation analysis (HSA) was performed prior to the principal components analysis (PCA), which helped to overcome sample size limitation inherent to PCA. ISVI was obtained from weighting vulnerability factors based on the tolerance statistic. Additionally, latent class cluster analysis (LCCA) was accomplished aiming to identify vulnerability spatial patterns within the study area. Our results show that the ISVI has high spatial variability. Moreover, the LCCA allowed us to identify the source of vulnerability in each urban area cluster. These findings enable a tailored design of FRM strategies, which intends to increase the efficiency of plans and policies, helping reduce implementation costs for mitigation measures.

Citation: Aroca-Jimenez, E., Bodoque, J. M., Garcia, J. A., and Diez-Herrero, A.: Construction of an Integrated Social Vulnerability Index in urban areas prone to flash flooding, Nat. Hazards Earth Syst. Sci. Discuss., doi:10.5194/nhess-2016-408, in review, 2017.
Estefania Aroca-Jimenez et al.
Estefania Aroca-Jimenez et al.
Estefania Aroca-Jimenez et al.

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Short summary
Flash floods are considered to be one of the natural hazards with the greatest capacity to generate risk. For this reason, it is necessary to know how a certain natural hazard produces an unequal impact on exposed population, and it can be characterized by any socioeconomic and demographic variables that influence society's preparedness, response and recovery. The above results in a Integrated Social Vulnerability Index (ISVI), which allows a tailored design of flood risk management strategies.
Flash floods are considered to be one of the natural hazards with the greatest capacity to...
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