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2012年“7•14”唐家沟泥石流灾害特征
Alternative TitleCharacteristics of Tangjiagou Debris Flow in Shimian of Sichuan in July 14, 2012
谢洪; 刘维明; 赵晋恒; 胡凯衡
Corresponding Author谢洪
2013-12
Source Publication地球科学与环境学报
Volume35Issue:4Pages:90-97
AbstractJuly 14,2012 in Tangjiagou ravine of Shimian County,Sichuan Province the event of debris flow disasters,resulting in two deaths and five missing and huge property and economic losses.Debris flow with the following characteristics:caused by the ravine upstream local torrential rain,formation mechanism for the type of start of the ditch bed,debris flow process lasted approximately 1 hour,a total of approximately 850 000 m3,especially for low-frequency large-scale debris flow;the ravine relative height of3 139 m,steep-channel and multi-bend,bayonet,leading to fluid in movement repeatedly block - outburst the clogging coefficient of 2.5 to 3,increased discharge and destruction;in the middle and lower reaches of the ravine,debris flow ditch bed sediments supply,extend the range of the recharge area of mud,sand and stones;debris flow density,severe up to 20.6 kN/m3,handling of strong,handling the largest volume of stones about235 m3,weight about 645 t;the fluid straight-forward,bend ultra-high height greater than 10 m;debris flowblocking the main river and the formation of the outburst disaster,and flash floods constitute a chain of mountain disasters,the harm extends to the main river both sides of the wide range of. Forest vegetation in the ravine is dense,but failed to stop living the occurrence of debris flow.Local residents in disaster prevention awareness is not strong,more debris flow hazard buildings,debris flow hazards object more increased disaster losses;particularity of the debris flow movement(bend ultra-high) increase the scope of the hazards;And casualties. Good ecological environment in the mountains,still need to guard against debris flow hazards.
Other Abstract
2012年7月14日,四川石棉田湾河流域唐家沟暴发泥石流,造成2人死亡、5人失踪及巨大经济损失。泥石流由沟道中上游局地强暴雨激发,形成机制为沟床起动型,持续过程约1 h,泥石流总量约85×104 m3,为低频率特大规模泥石流。唐家沟的相对高度为3 139 m,沟道陡急而多急弯、卡口,导致泥石流在运动中反复堵塞溃决,堵塞系数为2.5~3.0;在沟道中下游,泥石流获得了原有沟床堆积物的补给,使固体物质补给区范围扩大,规模增大,危害能力增强;流体含有2%~4.4%的黏粒,黏度较大,重度达20.6 kN·m-3,搬运力极强,搬运至沟口的最大石块体积约235 m3,质量约645 t;流体的直进性强,弯道超高高度高于11 m。泥石流堵塞田湾河并形成溃决灾害,构成了泥石流堰塞湖山洪组成的山地灾害链,危害由沟道延伸至主河两岸的较大范围。当地森林植被茂密,但泥石流十分发育,表明生态环境良好的山区仍需加强对泥石流灾害的防范。
Keyword泥石流
Subject Area自然地理学
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Indexed ByCSCD
Language中文
Funding Organization中国科学院/水利部成都山地灾害与环境研究所青年百人团队计划项目(110900K235);中国科学院重点部署项目(KZZD-EW-05-01)
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6840
Collection山地灾害与地表过程重点实验室
科技信息与传播中心
Recommended Citation
GB/T 7714
谢洪,刘维明,赵晋恒,等. 2012年“7•14”唐家沟泥石流灾害特征[J]. 地球科学与环境学报,2013,35(4):90-97.
APA 谢洪,刘维明,赵晋恒,&胡凯衡.(2013).2012年“7•14”唐家沟泥石流灾害特征.地球科学与环境学报,35(4),90-97.
MLA 谢洪,et al."2012年“7•14”唐家沟泥石流灾害特征".地球科学与环境学报 35.4(2013):90-97.
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