基于ArcGIS的湖北省远安县地质灾害风险定量评价

Quantitative Evaluation of Geohazard Risk Based on ArcGIS in Yuan’an County,Hubei Province

地质灾害风险评价是进行地质灾害防范化解的有效途径。本文在地质灾害详细调查和资料收集的基础上,利用ArcGIS与信息量模型、专家打分模型相结合的方法,分析了远安县地质灾害的易发性、危险性、易损性的评价因子及权重,在此基础上开展远安县县域尺度的地质灾害风险分区评价。评价结果表明,远安县县域可划分为高、中、低三级风险区,分别占全区面积的3.98%、29.97%、66.05%,评价结果与实地调查基本一致,可作为研究区的地质灾害风险预测和防灾减灾管理工作的参考,同时为远安县国土空间规划及生态文明建设提供科学依据。

Geohazards Risk Assessment is an effective way to prevent and mitigate the damages.The evaluating factors were analyzed related to susceptibility,danger and vulnerability of the geohazards in Yuan’an County,Hubei Province on the basis of detailed field investigation and data collection,with use of ArcGIS and information model as well as scoring method by experts.Then the distributed risk assessment of geohazards were carried out in Yuan`an county,which showed the whole county could be divided into the high,medium and low-level risk areas with proportion of 3.98%,29.97%,66.05%,respectively of the total area.It is consistent with the field investigation and can be used as a reference for the geohazards prediction,prevention and mitigation management,and can provide a scientific indication for the land and space planning and ecological civilization establishment of Yuan’an County.