Assessing social vulnerability and identifying spatial hotspots of flood risk to inform socially just flood management policy

Liton Chakraborty; Jason Thistlethwaite; Daniel ScottDaniel HenstraAndrea MinanoHoratiu Rus

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Assessing social vulnerability and identifying spatial hotspots of flood risk to inform socially just flood management policy

机译：Assessing social vulnerability and identifying spatial hotspots of flood risk to inform socially just flood management policy

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This study presents the first nationwide spatial assessment of flood risk to identify socialvulnerability and flood exposure hotspots that support policies aimed at protectinghigh-risk populations and geographical regions of Canada. The study used a nationalscaleflood hazard dataset (pluvial, fluvial, and coastal) to estimate a 1-in-100-yearflood exposure of all residential properties across 5721 census tracts. Residential floodexposure data were spatially integrated with a census-based multidimensional socialvulnerability index (SoVI) that included demographic, racial/ethnic, and socioeconomicindicators influencing vulnerability. Using Bivariate Local Indicators of SpatialAssociation (BiLISA) cluster maps, the study identified geographic concentration offlood risk hotspots where high vulnerability coincided with high flood exposure. Theresults revealed considerable spatial variations in tract-level social vulnerability andflood exposure. Flood risk hotspots belonged to 410 census tracts, 21 census metropolitanareas, and eight provinces comprising about 1.7 million of the total populationand 51 of half-a-million residential properties in Canada. Results identify populationsand the geographic regions near the core and dense urban areas predominantlyoccupying those hotspots. Recognizing priority locations is critically important for governmentinterventions and risk mitigation initiatives considering socio-physical aspectsof vulnerability to flooding. Findings reinforce a better understanding of geographicflood-disadvantaged neighborhoods across Canada, where interventions are requiredto target preparedness, response, and recovery resources that foster socially just floodmanagement strategies.

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来源
《Risk analysis》 |2023年第5期|1058-1078|共21页
作者
Liton Chakraborty; Jason Thistlethwaite; Daniel ScottDaniel HenstraAndrea MinanoHoratiu Rus;
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University of Waterloo, Waterloo, Ontario N2L3G1, Canada;

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正文语种英语
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100-year flood hazard; environmental justice; flood risk management; residential flood exposure; social vulnerability;

Assessing social vulnerability and identifying spatial hotspots of flood risk to inform socially just flood management policy

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