| 高家沟泥石流和深溪沟泥石流灾害特征 |
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| 引用本文： | 郭晓军,向灵芝,周小军,杨伟,Yang Wei.高家沟泥石流和深溪沟泥石流灾害特征[J].灾害学,2012,27(3):81-85. |
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| 作者姓名： | 郭晓军 向灵芝 周小军 杨伟 Yang Wei |
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| 作者单位： | 1. 中国科学院山地灾害与地表过程重点实验室/中国科学院·水利部成都山地灾害与环境研究所,四川成都 610041
2. 中国科学院山地灾害与地表过程重点实验室/中国科学院·水利部成都山地灾害与环境研究所,四川成都 610041;中国科学院研究生院,北京 100049 |
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| 基金项目： | 国家重点基础研究(“九七三”)项目(2011CB409902);国家自然科学基金(40801009) |
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| 摘 要： | 汶川地震之后,泥石流成为灾区最为严重的灾害类型之一,直接影响到灾后重建和灾区人民的生命财产安全.对汶川地震灾区7月初群发性泥石流进行野外考察,重点分析了高家沟和深溪沟两条泥石流的成因和特征.高家沟为由滑坡崩塌体引起的土力类粘性泥石流,容重约为2.07g/cm3,总量超过30万m3,分三次间歇性汇入主河,并堵断1/2河道,迫使岷江持续冲刷对岸路基,损毁213国道长达400m；深溪沟为山洪冲刷河道引起的水力类稀性泥石流,容重约在1.44～1.58 g/cm3之间,流量约在160～180 m3/s之间.对不同的泥石流沟应采用不同的防灾减灾措施,可有效降低泥石流灾害对人民生命财产的威胁.
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| 关 键 词： | 泥石流 山洪 沟床比降 沟道起动 汶川地震灾区 |
Research on the Debris Flow Hazards in Gaojia Gully and Shenxi Gully in 2011 |
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| Guo Xiaojun
,
Cui Peng
,
Xiang Lingzhi
,
Zhou Xiaojun
,
Yang Wei.Research on the Debris Flow Hazards in Gaojia Gully and Shenxi Gully in 2011[J].Journal of Catastrophology,2012,27(3):81-85. |
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| Authors: | Guo Xiaojun Cui Peng Xiang Lingzhi Zhou Xiaojun Yang Wei |
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| Institution: | 1,2(1.Key Laboratory of Mountain Hazards and Land Surface Progress/Institute of Mountain Hazards and Environment,CAS,Chengdu 610041,China;2.Graduate University of Chinese Academy of Sciences, Beijing 100049,China) |
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| Abstract: | Debris flows have become one of the most disastrous natural disasters in Wenchuan earthquake hit area since 2008,which have affected the re-construction and threatened lives and properties of local people.Field investigation on the July 3 group debris flows in 2011 is made in this area and debris flow parameters,formation conditions and processes in Gaojia Gully and Shenxi Gully are analyzed respectively.Gaojia Gully debris flow is a gravity viscous debris flow and formed by rock avalanches and landslides in the branch gully.It rushed into Minjiang River intermittently for three times,with a density of around 2.07 g/cm3 and total amount about 300 thousands cubic meters.The debris flow blocked half of Minjiang River,squeezed it constantly and finally damaged the national highway 213 for 400 m.Shenxi Gully debris flow was induced by hydraulic non-cohesive debris flow caused by mountain torrent and its bulk density is between 1.44~1.58 g/cm3.Its discharge is between 160-180 m3/s.Taking different control measures according to different debris flow characteristics can effectively reduce the threat of debris flows on people’s lives and property. |
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| Keywords: | debris flow mountain torrent slope gradient initiation Wenchuan earthquake |
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