The Evaluation Model of Typhoon Disaster Influence on Zhejiang Province

Based on the unceasing increase of economy and continual development of society, the loss from typhoon disaster is getting more fierce and fatal. So the scientific and objective evaluation model of typhoon disaster is very important for recovery from the disaster. Historical research shows that most evaluation methods centralize elements of natural disaster change, but ignore crucial factors about society and economy.Taking the social and economic factors into account, the Fuzzy Mathematics method is applied to analyze the disaster damage caused by 20 typhoons that have influenced on Zhejiang Province during the period from 2000 to 2006. Ten disaster impact factors are selected as model input and an index of every typhoon disaster can be obtained using the method. Meanwhile, the concept of disaster grade in Feng Lihua's work is used to translate the casualty and direct loss of every typhoon disaster into a normal index by means of numerical statistical analysis. Losses of typhoon disasters are divided into four grades as extreme great, heavy, and general by the two indexes. Comparison result shows that for 90% of the cases, the two indexes are accordant while the discrepancy for the rest 10% of cases is only one grade. So the model established can reasonably evaluate the losses caused by typhoon disaster of different density. The model is feasible in beforehand and fast evaluation of typhoon disasters based on the weather forecast and observation data as well as the economic data. It can offer directorial gist for emergency management, and support decision-making for disaster recovery.