北京市地质灾害韧性水平评估

Assessing level of resilience to geological hazards in Beijing

从经济条件、人口情况、社会保障与发展、基础设施和灾害管理5个方面构建了北京市地质灾害韧性评估指标体系;运用熵权-TOPSIS法定量计算了各区县地质灾害内在韧性得分,并结合地质灾害易发性分数得到了地质灾害韧性水平评估结果.结果表明:1)北京市地质灾害韧性水平呈现出明显的城区高、郊区低的趋势,其中海淀、朝阳区地质灾害韧性水平最高;2)朝阳、密云、怀柔地质灾害易发性总体水平最高,城6区中除了朝阳区以外,其他城区的地质灾害易发性水平较低;3)朝阳区地质灾害韧性水平较高,但地质灾害易发性偏高,仍具有较高的地质灾害风险;怀柔、密云、门头沟和房山的地质灾害韧性水平较低,并且地质灾害易发性水平较高,在突发地质灾害时具有高风险,需加强地质灾害风险评估、做好泥石流防治工程建设以及地质灾害避难场地的建设.

The index system for assessing the resilience of geological hazards in Beijing was constructed from five aspects:economic conditions,population situation,social security and development,infrastructure and disaster management.The intrinsic resilience score of geological hazards in each district and county was calculated by applying the entropy weight-TOPSIS method,and the assessment results of geological hazards resilience level were obtained by combining the geological hazards susceptibility scores.The results show that:1)the resilience level of geological hazards in Beijing shows a clear trend of high urban areas and low suburban areas,with Haidian and Chaoyang districts having the highest level of geological hazards resilience;2)Chaoyang,Miyun and Huairou have the highest overall level of geological hazards susceptibility,while the other urban areas,except Chaoyang,have alower levels of geological hazards susceptibility among the six urban districts;3)Chaoyang district has a high level of geological hazards resilience,but has a high level of geological hazards susceptibility,so it still has a high risk of geological hazards.The level of geological hazards resilience in Huairou,Miyun,Mentougou and Fangshan is low,and the level of geological hazards susceptibility is high,with a high risk in case of sudden geological disasters.They need to strengthen geological hazards risk assessment,improve the construction of debris flow control projects and build geological hazards refuge sites.