| 震后灾害链生机制及其对汶川地震城镇重建的影响 |
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| 引用本文： | 向灵芝,崔鹏,方华.震后灾害链生机制及其对汶川地震城镇重建的影响[J].灾害学,2010,25(Z1). |
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| 作者姓名： | 向灵芝 崔鹏 方华 |
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| 作者单位： | 1. 中国科学院成都山地灾害与环境研究所,中国科学院山地灾害与地表过程重点实验室,四川,成都,610041;中国科学院研究生院,北京,100049
2. 中国科学院成都山地灾害与环境研究所,中国科学院山地灾害与地表过程重点实验室,四川,成都,610041 |
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| 摘 要： | 汶川8级大地震对地表产生强烈扰动,导致次生山地灾害极度发育,影响到震后灾害的活动特征及其相应的减灾对策。震后松散固体物质急剧增加、流域微地貌变化明显(沟道堵塞严重)、水文变化利于侵蚀和洪峰,使得灾害群发链生:崩塌、滑坡→泥石流→堰塞湖→溃决洪水(泥石流),8月中旬灾区各地因强降雨而大规模爆发泥石流堵塞河道,洪水冲毁掩埋重建城镇,给地震重灾区造成巨大损失。从以汶川县映秀镇为例,在阐述灾害链研究成果的基础上,分析震后灾害链的形成条件、成灾过程以及对城镇重建居民点的危害特点,进而提出灾害防治措施,为灾后城镇建设防灾减灾提供参考建议。
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| 关 键 词： | 灾害链 汶川8级地震 城镇 |
Mechanism of Disaster Chain after Earthquake and the Impact to Urban Reconstruction in Wenchuan Earthquake Area |
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| Xiang Lingzhi,Cui Peng,Fang Hua.Mechanism of Disaster Chain after Earthquake and the Impact to Urban Reconstruction in Wenchuan Earthquake Area[J].Journal of Catastrophology,2010,25(Z1). |
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| Authors: | Xiang Lingzhi Cui Peng Fang Hua |
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| Institution: | Xiang Lingzhi1,2,Cui Peng1 and Fang Hua1,2(1.Institute of Mountain Hazards and Environment,Chinese Academy of Sciences and Ministry of Water Conservancy,Chengdu 610041,China,Key Lab.of Mountain Hazards and Earth Surface Processes,Chinese Academy of Sciences,2.Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | The Wenchuan earthquake produced strong disturbance to ground surface,which caused extreme development of secondary mountain disasters and influenced the activity characteristics of seismic disasters and disaster countermeasures.After the earthquake,loose mass in the gully channel was increased rapidly,micro-topography was changed significantly and hydrological changes were favorable to erosion and flood.Thus the disaster chain as collapse,landslide,debris flow,dammed lake and outburst flood occurred freque... |
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| Keywords: | disaster chain Wenchuan earthquake urban |
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