Formation Mechanism and Dynamic Characteristics of Chengpin Debirs Flow on July 16, in Anhua County of Hu'nan Province

PEI Laizheng; TAN Jianmin; LI Ming; YAN Jusheng

doi:10.13961/j.cnki.stbctb.2018.04.006

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Formation Mechanism and Dynamic Characteristics of Chengpin Debirs Flow on July 16, in Anhua County of Hu'nan Province

- Formation Mechanism and Dynamic Characteristics of Chengpin Debirs Flow on July 16, in Anhua County of Hu'nan Province
- Bulletin of Soiland Water Conservation Vol. 38, Issue 4, Pages: 34-37(2018)
- 作者机构：
  
  中国地质调查局武汉地质调查中心,湖北,武汉,430205
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2018.04.006
  CLC：
- Published：2018
- 稿件说明：
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PEI Laizheng, TAN Jianmin, LI Ming, et al. Formation Mechanism and Dynamic Characteristics of Chengpin Debirs Flow on July 16, in Anhua County of Hu'nan Province[J]. Bulletin of Soiland Water Conservation, 2018, 38(4): 34-37.
DOI：

PEI Laizheng, TAN Jianmin, LI Ming, et al. Formation Mechanism and Dynamic Characteristics of Chengpin Debirs Flow on July 16, in Anhua County of Hu'nan Province[J]. Bulletin of Soiland Water Conservation, 2018, 38(4): 34-37. DOI： 10.13961/j.cnki.stbctb.2018.04.006.

摘要

[目的

]

对湖南省益阳市安化县澄坪村“7·16”泥石流灾害成因机理及力学特征进行分析，为类似灾害的防灾减灾研究提供科学参考。[方法

]

通过灾后野外调查开展相关分析。[结果

]

湖南省安化县马路镇澄坪村梨树坪让家沟流域在地形地貌，地层岩性以及气象水文方面具备良好的孕灾条件；由于2014年7月16日的持续性强降雨作用，沟道上游一侧形成了一个约5.20×10

的滑坡堰塞湖，随后堰塞湖迅速溃决并形成了强大的溃决型泥石流，冲溃了下游的两道拦砂坝，并形成了高达190.65 m

/s的峰值流量。[结论

]

安化县澄坪村“7·16”泥石流灾害是一次典型的滑坡灾害转换成泥石流的灾害链，而下游两道堵塞坝的堵溃过程进一步放大了泥石流的峰值流量及规模，具有典型的堵溃放大效应。

Abstract

[Objective] By analyzing the formation mechanism and dynamic characteristics of the debris flow disaster

this paper aims to provide a scientific reference for prevention and mitigation research of the future disaster.[Methods] By field investigation and analysis.[Results] The disaster formation conditions of the Rangjia gully

in Anhua County

Yiyang City

Hu'nan Province

including topography

formation lithology and hydrology

are all prone to the formation of large-scale debris flow. Due to the continuous heavy rainfall

a large-scale landslide was formed and blocked the gully channel

but then the landslide-dam failed and formed outburst debris flow with the peak flow up to 190.65 m3/s.[Conclusion] The most striking feature of this debris flow is the conversion of landslide to debris flow. However

two manmade check dam along the downstream of the channel were all destroyed by outburst flow from the upstream

which magnified the peak flow.

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Keywords

references

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