VULNERABILITY OF METRO SYSTEM DUE FLOODING IN LARGE ASIAN CITIES

АУТОР(И) / AUTHOR(S): Ya-Jie Wang, Shui-Long Shen, Annan Zhou

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DOI:  10.46793/ACUUS2025.3.17.151

САЖЕТАК / ABSTRACT:

Climate change aggravates the frequent occurrence of extreme weather events, and flood disasters show significant characteristics of increasing intensity, expanding scope and worsening urban impacts. As hubs of population and wealth concentration, the vulnerability of cities is exposed in disasters. The hardened surface leads to the decrease of rainwater permeability, and the disorderly expansion makes the newly built urban area occupy the flood channel, forming a vicious circle of chronic waterlogging during rainfall events. We analyze the correlation between urban structural and morphological influencing factors and flood disasters in large asian cities, based on which we obtain the relationship between each influencing factor and flood disasters. We use complementary AHP calculate the flood vulnerability across East, South, and Southeast Asian countries. We also analyse the contribution to the city vulnerability due to existance of metro system. We find that the most vulnerable cities are Pearl River Delta in China, then, the cities from southeastern China, Japan, and major cities in India. The development of underground space in cities has a „double-edged sword“ effect. It can improve transportation efficiency but also increases the vulnerability of the urban system. The metro system significantly enhances economic vulnerability, but has a limited impact on casualty vulnerability.

КЉУЧНЕ РЕЧИ / KEYWORDS:

Climate change, flood, urban structure, metro system, vulnerability

ПРОЈЕКАТ / ACKNOWLEDGEMENT:

The research work was funded by Guangdong Provincial Basic and Applied Basic Research Fund Committee (2022A1515240073).

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