气候变化领域集成服务门户(CCPortal): Insights From the Particle Impact Model Into the High-Frequency Seismic Signature of Debris Flows

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DOI	10.1029/2020GL088994
	Insights From the Particle Impact Model Into the High-Frequency Seismic Signature of Debris Flows
	Zhang Z.; Walter F.; McArdell B.W.; Wenner M.; Chmiel M.; de Haas T.; He S.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:1
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. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Alarm systems; Geophysical prospecting; Particle size analysis; Seismic response; Seismic waves; Topography; Wave propagation; Bed topography; High frequency HF; Particle impact; Seismic datas; Seismic ground; Seismic networks; Seismic signatures; Video footage; Debris
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169250
作者单位	Key Laboratory of Mountain Hazards and Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China; Laboratory of Hydraulics, Hydrology and Glaciology, ETH Zürich, Zürich, Switzerland; University of Chinese Academy of Sciences, Beijing, China; Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zürich, Switzerland; Department of Physical Geography, Universiteit Utrecht, Utrecht, Netherlands; Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Zhang Z.,Walter F.,McArdell B.W.,et al. Insights From the Particle Impact Model Into the High-Frequency Seismic Signature of Debris Flows[J],2021,48(1).
APA	Zhang Z..,Walter F..,McArdell B.W..,Wenner M..,Chmiel M..,...&He S..(2021).Insights From the Particle Impact Model Into the High-Frequency Seismic Signature of Debris Flows.Geophysical Research Letters,48(1).
MLA	Zhang Z.,et al."Insights From the Particle Impact Model Into the High-Frequency Seismic Signature of Debris Flows".Geophysical Research Letters 48.1(2021).