汶川震区文家沟泥石流成灾机理与特征

倪化勇 郑万模 唐业旗 徐如阁 王德伟 陈绪钰 宋志

倪化勇, 郑万模, 唐业旗, 徐如阁, 王德伟, 陈绪钰, 宋志. 2011: 汶川震区文家沟泥石流成灾机理与特征. 工程地质学报, 19(2): 262-270.
引用本文: 倪化勇, 郑万模, 唐业旗, 徐如阁, 王德伟, 陈绪钰, 宋志. 2011: 汶川震区文家沟泥石流成灾机理与特征. 工程地质学报, 19(2): 262-270.
NI Huayong, ZHENG Wanmo, TANG Yeqi, XU Ruge, WANG Dewei, CHEN Xuyu, SONG Zhi. 2011: MECHANISM AND CHARACTERISTICS OF WENJIA-GULLY DEBRIS FLOW IN EPICENTER AREA OF WENCHUAN EARTHQUAKE. JOURNAL OF ENGINEERING GEOLOGY, 19(2): 262-270.
Citation: NI Huayong, ZHENG Wanmo, TANG Yeqi, XU Ruge, WANG Dewei, CHEN Xuyu, SONG Zhi. 2011: MECHANISM AND CHARACTERISTICS OF WENJIA-GULLY DEBRIS FLOW IN EPICENTER AREA OF WENCHUAN EARTHQUAKE. JOURNAL OF ENGINEERING GEOLOGY, 19(2): 262-270.

汶川震区文家沟泥石流成灾机理与特征

基金项目: 

国土资源大调查项目(1212010114020)和成都地质矿产研究所青年基金资助

详细信息
    作者简介:

    倪化勇,主要从事地质灾害预测预报、评价与灾害地貌的研究.Email: nihuayong@126.com

  • 中图分类号: P642.23

MECHANISM AND CHARACTERISTICS OF WENJIA-GULLY DEBRIS FLOW IN EPICENTER AREA OF WENCHUAN EARTHQUAKE

  • 摘要: 文家沟位于绵竹市清平乡,属于 5 12 汶川Ms8.0级地震极重灾区。地震发生后的3个汛期内,文家沟曾先后发生5次典型泥石流灾害,其中以2010年8月13日泥石流灾害最为严重,规模与灾情巨大,社会影响深远。在对文家沟泥石流跟踪调查的基础上,探讨了泥石流的成灾机理和特征。研究表明:(1)文家沟泥石流是地震和强降雨共同作用的结果,其成因可归纳为震因与物源以及雨因与水源两个方面,在整个泥石流形成和发生的过程中,呈现出洪流-侵蚀下切-崩滑-席卷-进一步侵蚀下切-进一步崩滑-增大泥石流规模的滚雪球式循环过程; (2)泥石流发生所需的雨量、雨强条件和水动力条件都显著降低,泥石流规模和雨量之间呈现出明显幂函数关系; (3)发生过程呈现出持续时间长、运动距离远的特征; (4)成灾过程呈现出明显的链式效应,危害形式多样; (5)泥石流频率呈现出高发性,规模呈现出放大性。最后提出了文家沟泥石流研究与防治的建议。
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出版历程
  • 收稿日期:  2010-10-30
  • 修回日期:  2011-03-01
  • 刊出日期:  2011-04-25

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