Heavy rainfall triggered loess-mudstone landslide and subsequent debris flow in Tianshui, China

doi:10.1016/j.enggeo.2014.08.015

	Heavy rainfall triggered loess-mudstone landslide and subsequent debris flow in Tianshui, China
	Peng, JB; Fan, ZJ; Wu, D; Zhuang, JQ; Dai, FC; Chen, WW; Zhao, C; Peng, JB (reprint author), Changan Univ, Dept Geol Engn, Xian 710054, Peoples R China.
刊名	ENGINEERING GEOLOGY
	2015-02-24
卷号	186 页码:79-90
关键词	Loess-mudstone landslide Debris flow Heavy rainfall Formation process
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2014.08.015
文献子类	Article
英文摘要	Continuous and heavy precipitation triggered a large loess landslide at the southern Dagou Village of Mapaoquan Town, Tianshui City, Gansu Province of China on July 21, 2013. The landslide debris rapidly turned into a debris flow that was deposited in the ravine mouth with the volume of 1.9 x 10(5) m(3). Detailed field mapping, three-dimensional laser scanning, aerial photograph interpretation, and laboratory tests were carried out to study the formation and moving characteristics of the landslide and subsequent debris flow. The results showed that: 1) The peak flow velocity and peak discharge of the debris flow were estimated to be approximately 72 m/s and 730 m(3)/s, respectively. The velocity had a tendency to first increase and then decrease from the head to entrance in the Dagou gully. 2) The analysis of rainfall conditions showed that the effective antecedent rainfall within 7 days and hourly rainfall intensity which triggered the slide-debris flows was 239 mm and 20 mm/h, respectively. Compared with the critical rainfall in this area, the effective antecedent rainfall was found to be more significant in triggering this event. 3) The mean and effective particle sizes were approximately 0.73-1.3 mm and 0.036-0.087 mm, respectively, and had the same distribution along the gully as the velocity, which confirmed the process of the variation in the flow velocity. 4) The scale amplification was very obvious in the formation and moving process of the slide-debris flows. (C) 2014 Elsevier B.V. All rights reserved.
学科主题	Engineering ; Geology
出版地	AMSTERDAM
资助项目	国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划（973计划）
项目编号	National Natural Science Foundation of China [41130753] ; National Basic Research Program of China (973 program) [2014CB744700] ; National Natural Science Foundation of Youth [41302250] ; Central University Fund Project [2013G1261057]
语种	英语
WOS记录号	WOS:000351649500009
资助机构	NSFC ; MOST
内容类型	期刊论文
源URL	[http://ir.lzu.edu.cn/handle/262010/182420]
专题	土木工程与力学学院_期刊论文
通讯作者	Peng, JB (reprint author), Changan Univ, Dept Geol Engn, Xian 710054, Peoples R China.
推荐引用方式 GB/T 7714	Peng, JB,Fan, ZJ,Wu, D,et al. Heavy rainfall triggered loess-mudstone landslide and subsequent debris flow in Tianshui, China[J]. ENGINEERING GEOLOGY,2015,186:79-90.
APA	Peng, JB.,Fan, ZJ.,Wu, D.,Zhuang, JQ.,Dai, FC.,...&Peng, JB .(2015).Heavy rainfall triggered loess-mudstone landslide and subsequent debris flow in Tianshui, China.ENGINEERING GEOLOGY,186,79-90.
MLA	Peng, JB,et al."Heavy rainfall triggered loess-mudstone landslide and subsequent debris flow in Tianshui, China".ENGINEERING GEOLOGY 186(2015):79-90.