广东省博罗县地质灾害特征研究及风险区划

Geological disaster characteristics and zoning evaluation in Boluo County,Guangdong Province

应用2 km×2 km网格半定量“地质灾害风险区划”分析法,完成了博罗县地质灾害详细调查工作,进而分析了其地质灾害特征、分布规律和形成条件,并进行了分区评价。通过地质灾害详细调查和灾害特征分析表明:博罗县地质灾害类型主要为崩塌、滑坡、地面塌陷3种,共发现地质灾害点211处,进行了规模、灾情和险情分类,并查明了博罗县地质灾害发育特征以及灾害的形成条件。最后,对研究区地质灾害易发性分区与危险性都进行了评价,根据定量和定性评估的结果并根据地区实际情况,将该县划分为高易发区、中易发区、低易发区和不易发区四大类;根据地质灾害危险性指数分区,结合现场调查,将该县划分为高危险区、中危险区、低危险区3类。

This study applies the 2 km×2 km grid semi-quantitative"geological disaster risk zoning"analysis to conduct detailed investigation of geological hazards in Boluo County.A total of 211 geological disaster sites were found,the scale,disaster situation and danger were classified,and the development characteristics and formation conditions of the disasters were identified.The results show that there are three types of disaster in Boluo County:collapse,landslide and ground collapse.According to the results of quantitative and qualitative classification and the actual situation,the county is divided into four categories:high-,medium-,low-and non-prone areas.According to the geological hazard index area,combined with the field investigation,the studied area is divided into three categories:low risk area,medium risk area and high risk area.