Effects of the morphology of sediment-transporting channels on the erosion and deposition of debris flows

doi:10.1007/s12665-018-7721-y

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

	Effects of the morphology of sediment-transporting channels on the erosion and deposition of debris flows
	He, Songtang1,2,3 ; Wang, Daojie1,2 ; Chang, Shiqiu 1,2,3; Fang, Yingchao1,2,3 ; Lan, Huijuan 1,2,3
刊名	ENVIRONMENTAL EARTH SCIENCES
	2018-07-01
卷号	77 期号:14 页码:13
关键词	Debris flows Channel morphology Hydraulic radius Sinuosity index Jiangjia gully
ISSN号	1866-6280
DOI	10.1007/s12665-018-7721-y
英文摘要	A series experiments are conducted to investigate the effects of streambed profile on the erosion and deposition of debris flows. It is found that straight channel can increase the run out of debris flows by 10-25%, compared to that of surfaces without channels, and that travel distance was positively correlated with the hydraulic radius of the channel. In addition, the presence of straight channels caused the volume of debris flow deposition to become normally distributed with respect to travel distance. In the case of curved channels, increases in the sinuosity index resulted in significant blockage and obstruction. In the deposition zone, the maximum deposition volume for a channel with a comparatively low sinuosity index (1.05) was <50% of the minimum deposition volume for a straight channel. Furthermore, the channel curvature affected not only the positions of deposition peaks along the travel distance but also the debris flow magnitudes in each unit interval (0.5 m). This study demonstrates the effects of differences in channel morphology on the erosional and depositional processes of gully debris flows. These findings are of significant importance for guiding debris flow risk assessment and for the restoration and reconstruction of downstream regions.
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000440144200004
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/23466]
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
通讯作者	Wang, Daojie
作者单位	1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Sichuan, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, 9,Block4,Renminnanlu Rd, Chengdu 610041, Sichuan, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	He, Songtang,Wang, Daojie,Chang, Shiqiu,et al. Effects of the morphology of sediment-transporting channels on the erosion and deposition of debris flows[J]. ENVIRONMENTAL EARTH SCIENCES,2018,77(14):13.
APA	He, Songtang,Wang, Daojie,Chang, Shiqiu,Fang, Yingchao,&Lan, Huijuan.(2018).Effects of the morphology of sediment-transporting channels on the erosion and deposition of debris flows.ENVIRONMENTAL EARTH SCIENCES,77(14),13.
MLA	He, Songtang,et al."Effects of the morphology of sediment-transporting channels on the erosion and deposition of debris flows".ENVIRONMENTAL EARTH SCIENCES 77.14(2018):13.