| 四川省北川县暴雨泥石流的发育与汶川地震的响应特征 |
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| 引用本文： | 铁永波,唐川.四川省北川县暴雨泥石流的发育与汶川地震的响应特征[J].灾害学,2011(4):73-75,81. |
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| 作者姓名： | 铁永波 唐川 |
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| 作者单位： | 成都地质矿产研究所;成都理工大学地质灾害防治与地质环境保护国家重点实验室; |
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| 基金项目： | 地质灾害防治与地质环境保护国家重点实验室(成都理工大学)开放基金(GZ2009-09) |
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| 摘 要： | 2008年9月24日,在汶川8.0级地震主要震区北川县境内爆发了区域性的泥石流灾害,造成了重大的灾情。为探明震区内暴雨泥石流发育与地震的响应特征,以北川县为例,在对该区域内震后暴雨泥石流特征调查的基础上,对境内72条暴雨泥石流沟的发育特征与断裂带相对位置及不同地震烈度区的对应关系进行了分析。结果表明,汶川地震后,北川县境内的暴雨泥石流数量具有典型的"上下盘效应",主要集中分布在断裂带(北川—映秀)的上盘;同时,泥石流的发育密度与地震烈度也表现出显著的"正烈度效应"关系,主要表现为泥石流发育的密度随地震烈度的增加而增大。研究结果对解释地震对泥石流发育及分布的影响具有重要的作用,可为震区泥石流的防灾减灾及风险控制提供科学依据。
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| 关 键 词： | 暴雨泥石流 响应特征 四川省北川县 汶川地震 |
Response Characteristics between Wenchuan Earthquake and the Rainfall Induced Debris Flow in Beichuan Country,Sichuan |
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| Tie Yongbo, Tang Chuan.Response Characteristics between Wenchuan Earthquake and the Rainfall Induced Debris Flow in Beichuan Country,Sichuan[J].Journal of Catastrophology,2011(4):73-75,81. |
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| Authors: | Tie Yongbo Tang Chuan |
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| Institution: | Tie Yongbo1,2 and Tang Chuan2 (1.Chengdu Institute of Geology and Mineral Resources,Chengdu 610081,China,2.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China) |
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| Abstract: | On September 24,2008,a regional rainfall-induced debris flow occurred in Beichuan,which located in the central area of Wenchuan earthquake,and caused serious loss.In order to ascertain the relationship between debris flow and earthquake in Wenchuan seismic area,the relationship between the debris flow numbers and the fault and between the density of debris flow and the intensity of earthquake are analyzed based on the survey of 72 debris flows gullies that formed in Beichuan country on August 24,2008.The re... |
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| Keywords: | rainfall-induced debris flow response characteristics Beichuan country Wenchuan earthquake |
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