Abstract
Natural disasters refer to casualties, property damage and social instability. Coastal urban areas with a high population density coupled with the construction of man-made structures are particularly subjected to storm surge hazards, which have become an increasingly urgent problem. In this paper, we try to set up a risk index system, including risk indicator, vulnerability indicator and prevention and mitigation capability index. Each of the risk components has large number of variables and quantities. Through displaying losses and characteristics of the four natural disasters, we put forward suggestions for better disaster mitigation. So that a better understanding of storm surges risk profile and early disaster warning measurement could be achieved.
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