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7月3日茂县棉簇沟特大泥石流成因和特征分析
Alternative TitleResearch on the giant debris flow hazards in Miancu Gully, Mao County on July 3, 2011
郭晓军1,2; 苏鹏程1; 崔鹏1; 宋国虎1,2
Corresponding Author崔鹏
2012
Source Publication水利学报
ISSN0559-9350
Volume43Issue:S2Pages:140-146
Other Abstract

通过对2011年7月3日的茂县棉簇沟泥石流灾害的现场调查,从物源、地形和水源条件入手,分析了灾害特征与形成演化过程。强降雨是本次泥石流的诱发因素,沟道内复杂的地形地貌特征为泥石流提供了演化和规模放大条件:(1)泥石流导致堰塞湖溃决,为泥石流提供了近1×104m3的水源,增强了泥石流的水动力条件,增加了沿途冲刷量;(2)沟道内多处基岩卡口和跌水放大了本次泥石流的规模和速度;(3)沿途固体物质补给使泥石流容重逐步增大。此次泥石流造成沟道微地貌改变,今后泥石流暴发的可能性和频率将会大大增加,高频率、中小规模泥石流将是今后该沟泥石流活动的特征。 
 

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The formation and evolvement process of this debris flow was analyzed based on the field investigation on the material sources, rainfall, and topography conditions. The rainfall was the inducing factor; however, the topography in the gully was the main reason which causes this catastrophic debris flow: (1) the dammed lakes formed in the earthquake were broken which increased the water supply, strengthened the dynamic force, and aggravated the erosion quantity finally. (2) the narrow sections and the drops amplified thepeak flow and velocity of the debris flow in the gully. (3) the solid material supplies the debris flow and enlarged the density along thegully. The possibility and frequency of debris flow will be much higher in heavy rainfalls in the future, but the scale will be less than thisgiant debris flow because of the microtopography had been changing. Suggestions were proposed: the warning system, control engineering should be built and disaster prevention and reduction awareness of local people also should be improved.

Keyword泥石流 滑坡 堰塞湖 地震 棉簇沟
Subject AreaP642.23
DOI10.13243/j.cnki.slxb.2012.s2.012
Indexed ByEI ; CSCD ; 北大中文核心
Language中文
Funding Organization国家重点基础研究(973)项目(2011CB409902)
Accession numberAccession number:20131616220797
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18296
Collection山地灾害与地表过程重点实验室
Affiliation1.中国科学院水利部成都山地灾害与环境研究所中国科学院山地灾害与地表过程重点实验室
2.中国科学院研究生院
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
郭晓军,苏鹏程,崔鹏,等. 7月3日茂县棉簇沟特大泥石流成因和特征分析[J]. 水利学报,2012,43(S2):140-146.
APA 郭晓军,苏鹏程,崔鹏,&宋国虎.(2012).7月3日茂县棉簇沟特大泥石流成因和特征分析.水利学报,43(S2),140-146.
MLA 郭晓军,et al."7月3日茂县棉簇沟特大泥石流成因和特征分析".水利学报 43.S2(2012):140-146.
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