[1]王根龙,张茂省,于国强,等.舟曲2010年“8·8”特大泥石流灾害致灾因素[J].山地学报,2013,(03):349.
　WANG Genlong,ZHANG Maosheng,YU Guoqiang,et al.Factor Analysis for Catastrophic Debris Flows on August 8，2010 in Zhouqu City of Gansu，China[J].Mountain Research,2013,(03):349.
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舟曲2010年“8·8”特大泥石流灾害致灾因素()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2013年03期
页码:
349
栏目:
山地灾害
出版日期:
2013-01-01

文章信息/Info

Title:
Factor Analysis for Catastrophic Debris Flows on August 8，2010 in Zhouqu City of Gansu，China
作者:
王根龙;张茂省;于国强;叶万军;
1. 中国地质调查局西安地质调查中心 黄土地质灾害重点实验室，陕西 西安 710054；
2. 中国科学院地质与地球物理研究所 工程地质力学重点实验室，北京 100029；
3. 西安科技大学，陕西 西安 710054
Author(s):
WANG Genlong; ZHANG Maosheng; YU Guoqiang; YE Wanjun
1. Key Laboratory of Geohazards in Loess Area，Xi’an Center of Geological Survey，China Geological Survey，Xi’an 710054，China；
2. Key Laboratory of Engineering Geomechanics，Institute of Geology and Geophysics，Chinese Academy of Sciences，Beijing 100029，China； 3. Xi’an University of Science and Technology，Xi’an 710054，China
关键词:
泥石流; 沟道比降; 强降雨; 防洪标准; 沟道挤占
Keywords:
debris flow; channel gradient; heavy rainfall; flood control standard; occupancy of drainage
分类号:
P642.23
文献标志码:
A
摘要:
甘肃省舟曲县城2010年"8.8"特大泥石流灾害损失惨重,造成1 675人死亡失踪,损毁房屋200余栋,世界震惊。通过现场对舟曲三眼峪泥石流调查和研究,认为"8.8"特大泥石流灾害既是天灾(自然条件),又是人祸(人为因素)。换言之,自然条件和人为因素是导致"8.8"特大泥石流的主要致灾因素。自然因素调查结果表明:1.三眼峪流域在25 km2范围内高差达2 500 m,且大眼峪和小眼峪沟谷纵坡降分别达到33%和36%,地形较为陡峻;2.三眼峪流域内松散固体物质总量约为26.4×106m3,被"8.8"特大泥石流冲出的固体物质仅为1.52×106m3,松散物源丰富;3.小时降雨量为77.3 mm,...
Abstract:
In August 2010 the large debris flows occurred in Sanyanyu valley and Luojiayu valley in Zhouqu county, Gansu province, northwestern China. It was the most destructive and natural disaster during the last several decades. The rare event destroyed more than 200 buildings and flooded about twothirds of Zhouqu county, killing 1 675 people. The field investigation and research shows that the extralarge scale debris flow disaster is not only a natural hazard but also a maninduced catastrophe. The natural factors for the debris flows have three conditions including steep geomorphology, abundant loose materials and heavy rainfall. Firstly, the altitude difference of the valley is up to about 2 500 m in a catchment area of 25 km2, and the channel gradients of the Dayanyu gully and Xiaoyanyu gully reach 33% and 36% respectively. Secondly, the volume of the deposited loose materials in Sanyanyu valley is estimated to be 26.4 million m3 among which only 1.52 million m3 have been carried by the Zhouqu 2010 debris flows. Thirdly, the hourly rainfall from 11:00 P.M. of 7 August to 12:00 P.M. was up to 77.3 mm. Investigation results also show that the iinsufficient design standard of protective measures (e.g. blocking dam and drainage channel) and occupancy problem of buildings and farmland in drainage channel are the main reasons for the heavy losses. The lessons learned from the debris flows will be valuable for the disaster area of Zhouqu County in future disaster mitigation.

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备注/Memo

备注/Memo:
收稿日期(Received date)：2012-12-08；改回日期(Accepted) : 2013-01-21。
基金项目（Foundation item）：国家自然科学
基金项目（项目批准号：41172262）资助。［Supported by the Nation Natural Science Foundation of China (No. 41172262).］
作者简介（Biography）：王根龙（1975-），男，汉族，陕西华阴人，副教授，博士，研究兴趣主要集中在崩塌、滑坡和泥石流地质灾害评价和计算研究等领域。[Wang Genlong, male, born in Huayin city of shannxi province, Ph D and associate professor, main researching field in assessment and calculation of geological disasters including rock falls, landslides and debris flows.] E-mail: wang2006@mail.iggcas.ac.cn
更新日期/Last Update: 1900-01-01