Abstract
This study presents the methodology and procedure for risk assessment of flood disasters in central Liaoning Province, which was supported by geographical information systems (GIS) and technology of natural disaster risk assessment. On the basis of the standard formulation of natural disaster risk and flood disaster risk index, of which weights were developed using combined weights of entropy, the relative membership degree functions of variable fuzzy set (VFS) theory were calculated using improved set pair analysis, while level values were calculated using VFSs, including hazard levels, exposure levels, vulnerability levels and restorability levels, and the flood risk level for each assessment unit was obtained using the natural disaster index method. Consequently, integrated flood risk map was carried out by GIS spatial analysis technique. The results show that the southwestern and central parts of the study area possess higher risk, while the northwestern and southeastern parts possess lower risk. The results got by the assessment model fits the area of historical flood data; this study offer new insights and possibility to carry out an efficient way for flood disaster prevention and mitigation. The study also provides scientific reference in flood risk management for local and national governmental agencies.
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Acknowledgments
This study was supported by the National Key Technology R&D Program of China under Grant No. 2013BAK05B01, the National Grand Fundamental Research 973 Program of China under Grant No. 2010CB951102, the National Key Technology R&D Program of China under Grant No. 2011BAD32B00-04 and the National Natural Science Foundation of China under Grant No. 41371495. The authors are grateful to the anonymous reviewers for their insightful and helpful comments to improve the manuscript.
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Guo, E., Zhang, J., Ren, X. et al. Integrated risk assessment of flood disaster based on improved set pair analysis and the variable fuzzy set theory in central Liaoning Province, China. Nat Hazards 74, 947–965 (2014). https://doi.org/10.1007/s11069-014-1238-9
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DOI: https://doi.org/10.1007/s11069-014-1238-9