Research on Comprehensive Risk Assessment Method for Natural Disasters:Taking Shenzhen City as an Example
Taking Shenzhen as an example,the paper analyzes the advantages,disadvantages,and applicability of three comprehensive risk assessment methods,which are weight analysis method,highest risk assessment method,and cluster analysis method.The results indicate that the weight analysis method is convenient and flexible to operate,but the value of weights is subjective.The highest risk assessment method can highlight the most dangerous types of disasters in the region,but it requires the risk assessment of each type of disaster to be the same spatiotemporal dimension and have a unified evaluation standard.Cluster analysis method for natural spatial classification of disaster impacts is more suitable for regions with concentrated single disaster impact zones.The main types of disasters in Shenzhen are typhoon and rainstorm flood.Topographic factors lead to the dispersion of geological disasters and rainstorm flood,which is more suitable using the highest risk assessment method.
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