知识与财富的链接
为了解决多灾种耦合的风险评估问题,应对日益严峻的防灾减灾工作,该文提出了针对自然灾害和事故灾难耦合的风险评估方法。首先,确定评估的单一事件类型,分析致灾因子的强度和概率;其次在地理信息系统平台上将灾害的空间信息进行叠加,得到叠加的危险源分布;再次,对目标区域的易损性信息进行评估;然后将叠加的危险性与易损性分级,通过重分类生成的等级值评估风险;最后根据事件链耦合关系矩阵确定危险源耦合评估结果。选取北京市为研究对象,应用该方法开发了北京市综合风险评估与区划系统。案例研究结果表明:该方法在城市多灾种耦合综合风险评估中具有可行性,有助于管理者对区域风险进行决策和控制。
A risk assessment method was developed for natural disasters related to technological problems to mitigate the effects of disasters.This method first describes the severity and probability of a single incident.Then,a risk map overlay is used to assess the spatial information using the geographic information system to collect vulnerability information.Integrated risks are ranked with a hazard interactions map finally produced based on disaster chains.The method was then applied to Beijing to develop a Beijin...