基于GIS的台风灾害损失评估模型研究

Study on Assessment Model of Typhoon Disaster Losses Based on GIS

由于台风灾害所造成的损失有些是无法用精确的数学模型来描述,其损失可能是一个区间值。为准确及时地了解台风灾害过程中可能造成灾害损失等级的大小,选择了降水量、降水强度、最大风速、经济易损性作为评价的指标。采用可拓分析方法,将评价指标及其特征值作为物元,通过计算综合关联度判断灾害损失的等级;建立基于GIS的台风灾害损失评估模型,以实现台风灾害的动态评估。

Some losses from typhoon disasters could not be described by precise mathematical models,as the losses may be an interval value.In order to know accurately and timely the probable loss degree during a typhoon disaster,precipitation,rainfall intensity,maximum wind velocity and economic vulnerability are chosen as evaluation indexes.By using extension analysis method,evaluation indexes and the characteristic values are considered as matter elements,and the disaster loss degrees are determined by calculation of comprehensive correlative degree.Assessment model of typhoon disaster losses based on GIS is established for dynamic evaluation on typhoon disasters.