| 四川汉源康家坡滑坡形成机理与滑坡—堰塞坝—泥石流灾害链分析 |
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| 引用本文： | 王涛, 王嘉昆, 潘冬. 四川汉源康家坡滑坡形成机理与滑坡—堰塞坝—泥石流灾害链分析[J]. 中国地质灾害与防治学报, 2020, 31(1): 1-7. |
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| 作者姓名： | 王涛 王嘉昆 潘冬 |
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| 作者单位： | 四川省地质矿产勘查开发局207地质队 |
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| 摘 要： | 2018年8月6日中午12时,汉源县富泉镇西沟发生大规模滑坡,约1.50×106 m3松散碎块石土在前期持续降雨作用下沿西沟右岸高速滑出、解体,并在主沟道内形成堰塞坝,体积约4.00×105 m3。滑坡造成1人失踪,近6.70×103 m2耕地被毁,紧急转移50余人。通过现场实地调查,结合无人机航飞、三维建模、地质、地震、水文、气象等资料,对康家坡滑坡基本特征进行了调查研究,调查表明,有利的地形条件、松散的覆盖层、充沛的前期降雨入渗及溪水对坡脚的冲刷是形成滑坡的主要原因。西沟原本为一条高频泥石流沟,本文在此基础上分析了堰塞坝溃坝的可能性及灾害链成灾模式。
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| 关 键 词： | 汉源县 滑坡 堰塞坝 泥石流 |
Analysis on mechanism of Kangjiapo Landslide and consequent debris flow in Hanyuan County of Sichuan Province |
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| WANG Tao,WANG Jiakun,PAN Dong. Analysis on mechanism of Kangjiapo Landslide and consequent debris flow in Hanyuan County of Sichuan Province[J]. The Chinese Journal of Geological Hazard and Control, 2020, 31(1): 1-7 |
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| Authors: | WANG Tao WANG Jiakun PAN Dong |
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| Affiliation: | (NO.207 Geological Team,BGEEMRSP,Leshan,Sichuan 614000,China) |
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| Abstract: | At about 12∶00 pm on August 6th,2018,a large-scale landslide happened in west gully of Hanyuan County.Under the early continuous rainfall approximately 1.50×10^6 m^3 loose gravel soil at right bank slid down at high speed and disrupted,and then transferred into the barrier dam approximately 4.00×10^5 m^3.the landslide damaged about 6.70×10^3 m^2 cultivated land,causing 1 person to be died and 50 people to be evacuate urgently.Through in-situ investigation,the basic characteristics of Kangjiapo Landslide were investigated combined with Unmanned Aerial Vehicle、three-dimensional modeling,geology,earthquake,hydrology,meteorology,the results indicate that the prominent terrain condition,loose overburden,abundant early rainfall.The erosion of the slope by gullies are the main cause of the landslide.The west gully was originally a valley where debris flow frequently happened,on this basic this paper analysis the possibility of the dam-break and disaster chain disaster mode. |
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| Keywords: | Hanyuan County landslide barrier dam debris flow |
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