Insights From the Particle Impact Model Into the High-Frequency Seismic Signature of Debris Flows

doi:10.1029/2020GL088994

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

	Insights From the Particle Impact Model Into the High-Frequency Seismic Signature of Debris Flows
	Zhang, Zhen 1,2,3; Walter, Fabian 2,4; McArdell, Brian W.4; Wenner, Michaela 2,4; Chmiel, Malgorzata 2; de Haas, Tjalling 5; He, Siming 1,3,6
刊名	GEOPHYSICAL RESEARCH LETTERS
	2021-01-16
卷号	48 期号:1 页码:11
ISSN号	0094-8276
DOI	10.1029/2020GL088994
通讯作者	Walter, Fabian(walter@vaw.baug.ethz.ch) ; He, Siming(hsm@imde.ac.cn)
英文摘要	Debris flows induce seismic ground unrest detectable over large distances. However, recent theoretical description of debris-flow seismograms has yet to be implemented in alarm systems. Here, we test the implications of a particle impact model for debris-flow detection and warning using seismic data. We analyze 14 debris flows at Illgraben, Switzerland, using instantaneous weight measurements, a seismic network and video footage. A novel approach to simulate seismic wave propagation estimates both vertical and horizontal particle impact forces on the ground. Scaling between impact forces, weight, and particle sizes suggests that seismic data identify destructive debris flows with large boulders. Impact force spectra change with bed topography and increase during flow propagation of large events, but decrease for smaller events. This can be explained with the known conveyor mechanism concentrating boulders at the flow front. Our results highlight opportunities to use seismic data for debris-flow research and warning. Plain Language Summary Debris flows are muddy mixtures of water, sand, and boulders, which move down steep mountain creeks in an uncontrolled way. They are a major threat to human life, properties, and infrastructure. Ground vibrations generated by debris flows contain information on the characteristics of debris flows that are difficult to measure with conventional methods. However, these ground vibrations are complex and challenging to understand so that scientists struggle to use them for quantitative studies. Here we treat the interaction between debris flows and the ground as many particles randomly bouncing off the channel bed. We can thus simulate the ground vibrations generated by such particle/ground impacts for 14 debris flows at Illgraben, Switzerland. Our results show that particle/ ground impacts correlate with the weight of the debris flow. For small events, ground vibrations decrease along the flow path. In contrast, for large-volume debris flows, vibrations gradually increase. This is related to sediment erosion and deposition showing how ground vibrations characterize debris flows.
资助项目	WSL ; Canton Valais ; Swiss Military ; National Key Research and Development program of China[2017YFC1501003] ; Major Program of the National Natural Science Foundation of China[41790433] ; National Natural Science Foundation of China[41772312]
WOS关键词	ILLGRABEN CATCHMENT ; AUTOMATIC DETECTION ; INFRASOUND ; LOCATION ; PATTERNS
WOS研究方向	Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000612943500017
资助机构	WSL ; Canton Valais ; Swiss Military ; National Key Research and Development program of China ; Major Program of the National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/55962]
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	Walter, Fabian; He, Siming
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Surface Proc, Chengdu, Peoples R China 2.Swiss Fed Inst Technol, Lab Hydraul Hydrol & Glaciol, Zurich, Switzerland 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Swiss Fed Inst Forest Snow & Landscape Res WSL, Zurich, Switzerland 5.Univ Utrecht, Dept Phys Geog, Utrecht, Netherlands 6.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhen,Walter, Fabian,McArdell, Brian W.,et al. Insights From the Particle Impact Model Into the High-Frequency Seismic Signature of Debris Flows[J]. GEOPHYSICAL RESEARCH LETTERS,2021,48(1):11.
APA	Zhang, Zhen.,Walter, Fabian.,McArdell, Brian W..,Wenner, Michaela.,Chmiel, Malgorzata.,...&He, Siming.(2021).Insights From the Particle Impact Model Into the High-Frequency Seismic Signature of Debris Flows.GEOPHYSICAL RESEARCH LETTERS,48(1),11.
MLA	Zhang, Zhen,et al."Insights From the Particle Impact Model Into the High-Frequency Seismic Signature of Debris Flows".GEOPHYSICAL RESEARCH LETTERS 48.1(2021):11.