广东省紫金县地质灾害风险评价

根据地质灾害风险评估原理及县域尺度灾害风险评价的需要，通过对紫金县主要地质灾害现状的实地调查和资料收集，确定了紫金县各镇地质灾害的危险度、暴露性和易损性指标，对紫金县地质灾害风险进行了评价。结果显示，紫金县各镇地质灾害风险从大到小依次为:紫城镇、黄塘镇、龙窝镇、临江镇、水墩镇、瓦溪镇、义容镇、苏区镇、九和镇、南岭镇、中坝镇、凤安镇、上义镇、好义镇、古竹镇、蓝塘镇、敬梓镇、柏埔镇。最后采用2000—2009年紫金县地质灾害造成的直接经济损失对评价结果进行了验证，结果表明，地质灾害风险评价结果具有较高的可信度。

Assessment on Geo-hazard Risk of Zijin County,Guangdong Province

Based on risk assessment principles of geo-hazards and the needs for it, field survey and data collection of major geo-hazards in Zijin County, Guangdong Province were carried out. Then the hazard of geological disasters, the exposure indicators and the vulnerability indicators were chosen to assess the risk. The results showed that the descending order of geo-hazard risk of towns in Zijin County were Zichen, Huangtang, Longwo, Linjiang, Shuidun, Waxi, Yirong, Suqu, Jiuhe, Nanling, Zhongba, Fengan, Shangyi, Haoyi, Guzhu, Lantang, Jingzi, Baipu. Finally, the direct economic losses caused by geo-hazards from 2000 to 2009 were used to evaluate the risk assessment results, which showed that the risk assessment method was highly credible.