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Integrating resilience into an urban flood risk assessment framework: a case study of the Minzhi region, Shenzhen City

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Abstract

History has witnessed a long list of flood events and resilience has been a topical concept in flood risk assessment. However, previous studies did not integrate resilience into urban flood risk assessment frameworks and describe the merits of considering resilience in them. Here, a case study was conducted in Shenzhen City with an improved resilience metric based on system performance curve and the maximum and minimum water depth thresholds. A novel urban flood assessment framework was developed and compared with a conventional framework using hazard, vulnerability, and flood risk maps. The results demonstrate that in the resilience-based framework, some areas with high maximum inundation depths and long inundation durations have lower hazard than the framework without resilience because of their high resilience. More areas with low resilience are classified as very high hazard zones and hazard levels of some areas with high resilience decrease. The resilience-based framework considers the impact of land use type without using it as an index. The calculations are simplified and there is a greater emphasis on economic loss and casualties. Flood risk levels of areas in traffic lands increase while commerce, residence, greenspace, and waterbody decrease. The results suggest that integrating resilience into the urban flood risk assessment framework has substantial merits and resilience should be considered when assessing urban flood risk.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China [Grant No. 51879108]. We also appreciate the anonymous reviewers. The quality of the paper is greatly improved by their valuable advice and comments.

Funding

This work was supported by the National Natural Science Foundation of China [Grant No. 51879108].

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All authors contribute to the study conception and design, and material preparation. The data collection and analysis, and the original paper preparation were performed by Jiaxuan Zheng. The reviewing and editing of the paper and supervision of the study were performed by Guoru Huang.

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Correspondence to Guoru Huang.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Zheng, J., Huang, G. Integrating resilience into an urban flood risk assessment framework: a case study of the Minzhi region, Shenzhen City. Stoch Environ Res Risk Assess 37, 1183–1197 (2023). https://doi.org/10.1007/s00477-022-02325-9

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  • DOI: https://doi.org/10.1007/s00477-022-02325-9

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