摘要
四川5.12汶川地震震级高,强度大,造成人民生命财产的损失巨大。地震次生灾害特别严重,频繁发生,以坡面地质灾害如崩塌、滑坡、泥石流和地面地质灾害如地裂缝、地面塌陷、道路滑塌以及堰塞湖和社会灾祸最为常见。这些次生灾害以活动断裂为地质构造基础;地表大量松散固体物质为物质来源;强烈频繁的余震、坡面流水和沟谷洪流为动力条件,暴雨、洪水、持续的高温为诱发和触发因素。暴雨、洪水、高温是次生灾害主要的致灾因子,由此形成了三个系列的灾害链,造成人员伤亡和生态环境恶化,影响更加深远。对汶川地震次生灾害的防治要加强监测与动态分析,及时排除堰塞湖险情,严防传染病的蔓延。当前防治应以工程措施为主,植树种草,进行生态修复是进行远期治理的根本措施。
The secondary disasters take place frequently and damage seriously in Wenchuan quake--hit area, West China. Their causes, hazards and reduction are analyzed and discussed in detail according to field investigations and statistical data. Active faults are their structure foundation; the loose solid surface provides them with material conditions; rich precipitation and earthquakes are their power source. Three main hazard chains are resulted from earthquake, torrential rain and high tem- perature. They bring up human dead, property losses, environment destroy, construction engineering damage. Ecological and engineering measures are enhanced on the same time for post--earthquake reconstruction.
出处
《地质灾害与环境保护》
2008年第4期1-5,共5页
Journal of Geological Hazards and Environment Preservation
基金
广东省科技计划项目(2007B020710009)
关键词
汶川地震
次生灾害
成灾
治理
Wenchuan earthquake
secondary disasters
disasters genesis
adjustment
