【摘要】 文中对汶川地震引发的次生地质灾害进行界定,阐明了汶川地震次生灾害很严重,以崩塌、滑坡、泥石流等坡面地质灾害和堰塞湖威胁为主,并归纳了次生地质灾害的特点,即震区内活动断裂纵横交错是地质构造基础;地震形成的地表松散固体物质是其物质来源;降水丰沛、径流量较大为其提供了动力条件;暴雨、洪水、持续的高温是其重要的诱发因素,同时在震前预防、震时应急防护和紧急处置及震后救治3方面提出了防范次生地质灾害的建议,最后阐明了研究地震引发次生地质灾害有其科学性和深刻现实意义。更多还原

【Abstract】 In the research, secondary geological disasters of Wenchuan earthquake were defined and the consequences were illustrated based on geological disasters, such as collapse, landslide and debris flow, and threats of barrier lakes. In addition, the characteristics of secondary disasters were analyzed, as follows: Rupture of geological faults lays foundation in terms of geological structure; loose solids provide resources of an earthquake; abundant rainfall and large runoffs are driving forces of an earthquake; rainstorm, flood, and long-term high temperature are major inducing factors. Furthermore, suggestions on prevention of secondary disasters were proposed in terms of prevention before, at and after an earthquake. Finally, the scientific and practical significances of secondary disasters were illustrated.更多还原