Risk assessment of Sichuan–Tibet Highway susceptible to debris flows at Suotong Basin, southeastern Tibet

doi:10.1088/1755-1315/570/4/042051

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地灾害与地表过程重点实验室

	Risk assessment of Sichuan–Tibet Highway susceptible to debris flows at Suotong Basin, southeastern Tibet
	Hu,Kaiheng 1,2; Wang,Xiaodong 3; Liu,Jinfeng 1,2; Wang,Zhang 1,2,4; Tang,Jinbo 1,2; Zhong,Wei 1,2
刊名	IOP Conference Series: Earth and Environmental Science
	2020-10-01
卷号	570 期号:4
ISSN号	1755-1307
DOI	10.1088/1755-1315/570/4/042051
英文摘要	Abstract The planned Sichuan–Tibet Highway will pass through many debris flow-prone areas. Suotong catchment with a drainage area of 38.03 km2, a tributary of Parlung Zangbo River in the Bomi County of Tibet, has not experienced large-scale debris flows since 1991. Field survey and image interpretation show that glacial till in the catchment has volume of approximately 160 mm3 and is the primary source of loose materials for debris-flow reoccurrence. Once large glacial debris flows occur, they will cause harm to the highway. A comprehensive method including engineering geology, hydraulics, and computational mathematics is developed to quantitatively assess the debris-flow risk to the highway. The magnitude and peak discharge of glacial debris flows of a 100 year return period are calculated using empirical relationships in this region. The peak velocity at the outlet can reach 6.75 m/s, and the peak discharge is 6238 m3/s for such a return period. The Saint–Venant equations governing debris-flow movements are numerically solved by finite difference method. The simulated results are close to those by empirical methods. The hazard value at the alluvial fan is as high as 24.7 according to the numerical simulation. Two routing schemes (one goes through the tunnel and other pass the bridge) are compared with each other. Although the bridge scheme is cheaper than the tunnel scheme, the bridge’s section cannot fully discharge debris flows within the 100-year return period. Therefore, the tunnel scheme is safer and more strongly recommended than the bridge scheme.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:1755-1307-570-4-042051
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/54952]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
作者单位	1.Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, Chengdu, 610041, China 2.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China 3.CCCC Second Highway Consultants Co., Ltd. 4.University of Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式 GB/T 7714	Hu,Kaiheng,Wang,Xiaodong,Liu,Jinfeng,et al. Risk assessment of Sichuan–Tibet Highway susceptible to debris flows at Suotong Basin, southeastern Tibet[J]. IOP Conference Series: Earth and Environmental Science,2020,570(4).
APA	Hu,Kaiheng,Wang,Xiaodong,Liu,Jinfeng,Wang,Zhang,Tang,Jinbo,&Zhong,Wei.(2020).Risk assessment of Sichuan–Tibet Highway susceptible to debris flows at Suotong Basin, southeastern Tibet.IOP Conference Series: Earth and Environmental Science,570(4).
MLA	Hu,Kaiheng,et al."Risk assessment of Sichuan–Tibet Highway susceptible to debris flows at Suotong Basin, southeastern Tibet".IOP Conference Series: Earth and Environmental Science 570.4(2020).