四川省北川县赵家沟地震次生泥石流形成条件分析

英文篇名：Analysis on the developing conditions of debris flow induced by Wenchuan earthquake in Zhaojia Gully of Beichuan County,Sichuan Province
中文刊名：中国地质灾害与防治学报
英文刊名：The Chinese Journal of Geological Hazard and Control
作者：朱忠礼 ; 刘希林 ; 尚志海
英文作者：ZHU Zhong-li1 ; LIU Xi-lin2 ; 3 ; SHANG Zhi-hai2(1.State Key Laboratory of Remote Sensing Science ; School of Geography ; Beijing Normal University ; Beijing 100875 ; China ; 2.School of Geography and Planning ; Sun Yat-Sen University ; Guangzhou 510275 ; China ; 3.Natural Disaster Research Center ; Sun Yat-Sen University ; Guangzhou 510275 ; China)
中文关键词：泥石流 ; 形成条件 ; 地震次生灾害 ; 四川省北川县 ; 赵家沟
英文关键词：debris flow ; developing condition ; earthquake induced hazards ; Zhaojia gully of Beichuan-County ; Sichuan Province
出版日期：2010-12-15
机构：遥感科学国家重点实验室北京师范大学地理学与遥感科学学院;中山大学地理科学与规划学院;中山大学自然灾害研究中心;
年：2010
期：04
出版单位：中国地质灾害与防治学报

摘要

赵家沟位于北川县擂鼓镇坪上村西北侧,属汶川地震极重灾区,在地震发生前为一般性清水沟或洪水沟。由于地震的影响,流域内发育了多处滑坡和崩塌,斜坡上和沟道中堆积了大量松散固体物质。在2008年9月24日暴雨的作用下,赵家沟流域发生了百年不遇的泥石流灾害,成为地震次生泥石流沟。通过现场实地调查和室内分析,对地震次生泥石流灾害形成的地质地貌条件、物源条件和水源条件进行了分析。表明地震次生泥石流灾害的发生频率和规模有可能加大,其危险性由于松散固体物质的增大而上升,这是地震次生泥石流灾害显著的特征。
Zhaojia gully is located at northwest side of Pingshang village of Leigu town,Beichuan county,Sichuan,China,which was heavily hit by Wenchuan Earthquake.It was general water ditch or flood channel before the earthquake,and developed many landslides and collapses with loose solid material deposited on the slopes and the channel after the earthquake.Driven by the heavy storm on September 24,2008,rare debris flow happened in Zhaojia gully,which made it into a post-earthquake debris flow gully.By on-site field survey and laboratory analysis,this paper studied the developing conditions of debris flow,including geological and geomorphologic conditions,sediments source conditions,and rainfall conditions.The analysis shows that because of earthquake induced solid material,the frequency and magnitude of the debris flow and its hazard will increase greatly,which is the most significant feature of post-earthquake debris flow.

引文

[1]国家减灾委员会-科学技术部抗震救灾专家组.汶川地震灾害综合分析与评估[M].北京:科学技术出版社,2008.
    [2]唐川,梁京涛.汶川震区北川9.24暴雨泥石流特征研究[J].工程地质学报,2008,16(6):751-758.
    [3]陈宁生,黄蓉,李欢,等.汶川5.12地震次生泥石流沟应急判识方法与指标[J].山地学报,2009,27(1):108-114.
    [4]康志成,李焯芬,马蔼乃,等.中国泥石流研究[M].北京:科学出版社,2004.
    [5]刘希林,唐川.泥石流危险性评价[M].北京:科学出版社,1995.
    [6]周荣军,黄润秋,雷建成,等.四川汶川8.0级地震地表破裂与震害特点[J].岩石力学与工程学报,2008,27(11):2173-2183.
    [7]张永双,雷伟志,石菊松,等.四川省北川县擂鼓盆地地壳稳定性与城镇选址[J].地质学报,2008,82(12):1758-1768.
    [8]唐川,丁军,梁京涛.汶川震区北川县城泥石流源地特征的遥感动态分析[J].工程地质学报,2010,18(1):1-7.
    [9]朱平一,罗德富,寇玉贞.西藏古乡沟泥石流发展趋势[J].山地研究,1997,15(4):296-299.
    [10]鲁安新,邓晓峰,赵尚学,等.2005年西藏波密古乡沟泥石流暴发成因分析[J].冰川冻土,2006,28(6):956-960.
    [11]中华人民共和国国土资源部.泥石流灾害防治工程勘查规范[M].北京:中国标准出版社,2006.