5·12汶川地震在武都区造成灾害的特点分析
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摘要
5.12汶川地震引发了崩塌、滑坡、泥石流和地裂缝等次生地质灾害.经过对武都区地质灾害应急排查,确定地质灾害隐患点516处,其中由地震引发新的灾害占87.8%.通过运用GIS技术手段对灾害点综合分析,发现这次地震在武都区造成的灾害具有一定的规律性.通过灾害点具体现象和理论相结合分析了3种灾害特点的成因,为以后抗震减灾提供一些技术参考和理论依据.
The 5·12 Wenchuan earthquake has triggered major ground collapses,landslides,debris flows,secondary earth surface cracks,and other geological hazards.Our detailed emergency investigation around the Wudu region,identified potential geological hazards at 516 places,87.8 percent of which was caused by new earthquakes.By using the GIS technology to analyse key points of the disaster,we have found that the damages caused by this earthquake have a certain degree of regularity.Through the actual phenomena of the specific disaster places and combined with our theoretical analysis,we have analyzed three characteristics and their causes,thus providing reliable technical reference for future disaster reduction.
The 5·12 Wenchuan earthquake has triggered major ground collapses,landslides,debris flows,secondary earth surface cracks,and other geological hazards.Our detailed emergency investigation around the Wudu region,identified potential geological hazards at 516 places,87.8 percent of which was caused by new earthquakes.By using the GIS technology to analyse key points of the disaster,we have found that the damages caused by this earthquake have a certain degree of regularity.Through the actual phenomena of the specific disaster places and combined with our theoretical analysis,we have analyzed three characteristics and their causes,thus providing reliable technical reference for future disaster reduction.
引文
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[2]张振中.黄土地震灾害预测[M].北京:地震出版社,1999.
[3]孙崇绍.特大地震的震害特征[J].西北地震学报,1993,15(2):64-70.
[4]孙崇绍,蔡红卫.我国历史地震时滑坡崩塌的发育及分布特征[J].自然灾害学报,1997,6(1):25-30.
[5]焦赟,叶伟林.兰州地区黄土湿陷地质灾害危险性分析[J].甘肃科学学报,2008,20(3):60-63.
[6]白铭学,张苏明.高烈度地震时黄土地层的液化移动[J].工程勘察,1990,22(6):1-6.
[7]GB.50025-2004.湿陷性黄土地区建筑规范[S].北京:中国建筑工业出版社,2004.
[8]曾思伟,赵冬至,郭涛.长江上游陇南、陕南部分地区的滑坡、泥石流发育条件及分布[J].甘肃科学学报,1996,8(增刊):13-22.
[9]毛桐恩,姚家榴.中国南北地震带北段、中段的深部环境与地震关系的初步探讨[J].地震地质,1982,4(2):21-31.
[10]毛彦龙,胡广韬,赵法锁,等.地震动触发滑坡体滑动的机理[J].西安工程学院学报,1998,20(4):45-52.
[11]李忠生.国内外地震滑坡灾害综述[J].灾害学,2003,18(4):64-70.
[12]韩竹君,向宏发,冉勇康.青藏高原东缘礼县—罗家堡断裂带晚更新世以来的活动性分析[J].地震地质,2001,23(1):43-48.
[13]候康明,雷中生,万夫领,等.1879年武都南8级大地震及其同震破裂研究[J].中国地震,2005,21(3):295-310.
[14]艾南山.历史地震滑坡与新构造关系新知[J].兰州大学学报(自然科学版),1984,20(1):178-189.
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