四川三州地区提升路网气候恢复力研究

A Study on the Resilience of Road Network Against Geological Disasters in the Three Ethic Autonomous Prefectures of Sichuan Province

四川省三州地区地处中国一二级阶梯过渡地带,地质构造复杂,新构造运动强烈,属断裂构造发育,极易因强降水等极端天气诱发山洪、泥石流、崩塌、滑坡等灾害,导致该区域路网灾害发生频率高、强度大和多灾并发。这在高山峡(深)谷区尤为严重。通过分析四川省三州地区的路网灾害风险管理体制机制,发现主要问题在于:灾害科学研究相对薄弱、灾害应急与防治技术较为缺乏、灾害危害度和路网基础设施的易损性较大、路网系统的抗灾能力和恢复力较弱。为了在四川三州地区构建安全可靠、应急保障能力强的现代路网体系,需要通过构建时空、纵向、横向三位一体的综合灾害风险治理体系和健全灾害科学、应急技术、风险管理三者有机结合的防灾减灾机制等措施,不断提升四川三州地区的路网气候恢复力。

The three ethnic autonomous prefectures in Sichuan Province are located in the transition zone of China’s first and second topography steps.Due to complex geological conditions and strong neotectonic movements,geological disasters such as mountain floods,mud flows,rock falls and landslides would occur with high frequency and intensity after extreme weather such as heavy precipitation,especially in deep valleys.The study has revealed some problems in the disaster and risk management system of the road network in the three ethnic prefectures,which include weak scientific research on geological disasters,lack of the technologies related to disaster emergency response and disaster prevention,high vulnerability of road network infrastructure and geological disaster intensity,and low disaster resistance and resilience of the road network system.In order to improve the resilience of road network system against weather-related disasters in the three ethnic autonomous prefectures of Sichuan Province,we need an improved and safer road network with stronger resilience by strengthening scientific studies on geological disasters,emergency response system and risk management standard.