CAJ | 학술논문

簇头沟是岷江右岸一条低频泥石流沟，受2013年7月极端暴雨的影响，暴发特大泥石流。结果显示，汶川地震造成流域内的坡面和沟道堆积的大量的松散物质是泥石流形成的物源，流域上游暴雨及其形成的山洪是此次泥石流形成的激发因子。“7.10”泥石流为过渡性泥石流，泥石流容重约为1.8～1.9 t／m3，沟口处最大流速为9.2 m／s，峰值流量为515 m3／s，冲击力达到3657 t，输沙总量约为50×104 m3。泥石流过程表现为为暴雨（山洪）-滑坡（坡面泥石流）-泥石流-堰塞湖-溃决洪水。对震后低频泥石流危险性认识不足、防治工程设计标准偏低是此次灾害造成重大损失的主要原因。在未来灾害防治工程设计中，应合理估计灾害规模和潜在风险。
족두구시민강우안일조저빈니석류구，수2013년7월겁단폭우적영향，폭발특대니석류。결과현시，문천지진조성류역내적파면화구도퇴적적대량적송산물질시니석류형성적물원，류역상유폭우급기형성적산홍시차차니석류형성적격발인자。“7.10”니석류위과도성니석류，니석류용중약위1.8～1.9 t／m3，구구처최대류속위9.2 m／s，봉치류량위515 m3／s，충격력체도3657 t，수사총량약위50×104 m3。니석류과정표현위위폭우（산홍）-활파（파면니석류）-니석류-언새호-궤결홍수。대진후저빈니석류위험성인식불족、방치공정설계표준편저시차차재해조성중대손실적주요원인。재미래재해방치공정설계중，응합리고계재해규모화잠재풍험。
The catastrophic debris flow in Cutou gully resulted from extreme rainstorms,which is a low fre-quency debris flow gully on the right of Mingjiang river.The incompact substance in the gully is the main reason of the catastrophic debris flow;however,the rainfall and mountain torrent are the inducing factors.Debris flows are featured with sub-viscous debris flows,the density of 1.8~1.9 t/m3 ,the maximum velocity of 9.2 m/s,the peak discharge of 5 15 m3/s,the impact force of 3 657 t and the volume of 50 ×104 m3 .Debris flow induced disaster chains,including the process of rainstorm-landslide-debris flow-dammed lake-outburst flood.The shortage of dan-gerous low frequency debris flow gullies assessement and the destruction of debris flow control constructions leaded to huge property losses.It is strongly suggested for mitigation that estimated the scale of hazards resonably, strengthened assessement of the dangerous debris flow gullies.