Assessing Consequences of Integrated Multi-Hazards on Hong Kong Island
Publication: Geo-Extreme 2021
ABSTRACT
Natural hazards have been a serious problem in society due to their risks to human lives and infrastructure. An extreme storm in Hong Kong can trigger multiple types of hazards due to the hilly terrain. Hence, assessment of the multihazard risk is needed. This study aims to assess the risks posed by multiple hazards on Hong Kong Island under two storm scenarios of 29% and 85% of the 24-h Probable Maximum Precipitation (PMP). The hazards considered in this study are landslides, debris flows, and flooding. The consequences on different kinds of buildings and exposed population are evaluated quantitatively and recorded by combining both the multihazard layers and the building database layer. The results are presented on a geographic information system (GIS) showing the spatial distributions of the hazards and the potentially affected population from the impact of the three integrated multihazards. The outcome of the study indicates high vulnerability if Hong Kong Island is impacted by high-intensity rainstorms. The multirisk analysis information in this study is useful for making decision on suitable risk management measures.
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Geo-Extreme 2021
Pages: 352 - 357
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© 2021 American Society of Civil Engineers.
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Published online: Nov 4, 2021
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