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The Indexes, Model and Method for Urban Safety Assessment under Emergent Situation Based on the Catastrophe Model |
CHEN Qiu-Ling, ZHANG Qing, XIAO Lu |
Shanghai University,Shanghai,China |
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Abstract The paper firstly introduces the logical framework of the security situation in the city based on the perspective of emergency and designs the structure of fourdimensional evaluation index system of the degree of urban safety from the aspects of social safety, production safety, public health safety and environmental safety; Secondly, it proposes mutation types of the safety situation in the city based on catastrophe theory and constructs the catastrophe model to measure the degree of urban safety, then put forward assessment methods and procedures; Finally, the paper uses the model above to determine the degree of safety of Shanghai.
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Received: 15 June 2009
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