Analyzing Bulk Flow Characteristics of Debris Flows Using Their High Frequency Seismic Signature

doi:10.1029/2021JB022755

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

	Analyzing Bulk Flow Characteristics of Debris Flows Using Their High Frequency Seismic Signature
	Zhang, Zhen 3,4,5; Walter, Fabian 2,4; McArdell, Brian W.2; de Haas, Tjalling 1; Wenner, Michaela 2,4; Chmiel, Malgorzata 4; He, Siming 3,5
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
	2021-12-01
卷号	126 期号:12 页码:19
ISSN号	2169-9313
DOI	10.1029/2021JB022755
通讯作者	Zhang, Zhen(zhangzhenkgands@163.com) ; He, Siming(hsm@imde.ac.cn)
英文摘要	Quantifying debris-flow characteristics remains a key challenge in natural hazard research. Recent studies suggest that seismic signals can reveal debris-flow properties. However, the accuracy and applicability of theoretical models linking bulk flow properties to the seismic signature of a debris flow remain elusive. By extending a previously proposed model of random single-particle impact forces to multi-particle force chains acting on the channel bed, we describe the generation of high frequency seismic signals, and thereby estimate the bulk flow dynamics of six debris-flow events at Illgraben, Switzerland. The theoretically predicted basal force fluctuations agree with in-situ measurements at a basal force plate and seismic signals recorded adjacent to the channel. According to our model, both random single-particle impacts and random impacts caused by multi-particle force chains control basal force fluctuations. The relative contributions of single particles and of multi-particle force chains may vary significantly for different events and different positions within events. The relative contribution of multi-particle force chains is expected to be larger in the flow front, where particle concentrations are higher. The ratio between single-particle and multi-particle contributions appears to control the non-linear relation between flow depth and the magnitude of the high frequency seismic signals. Our results suggest that fluctuating basal forces are strongly controlled by particle size and flow depth, and open new perspectives for the understanding of bulk flow characteristics, such as flow depth and weight, and of the high frequency seismic signals generated by debris flows. Plain Language Summary Traditional methods have many limitations in observing and estimating debris-flow characteristics, such as flow depth and weight. Although an increasing number of studies has recently shown the potential of using seismic signals to observe these debris-flow characteristics, the physical relation between these characteristics and ground vibrations is not well understood. Here we develop a model, which describes how particles within a debris flow transmit forces as they collide with the ground. We focus on six debris flows at Illgraben, Switzerland, and observe a good agreement between modeled and measured forces. We find that both multi-particle force chain impacts and single-particle impacts control the debris-flow basal force fluctuations. Thicker flows transmit more seismic energy to the underlying ground. Our study shows how seismic measurements can be used to obtain quantitative information about debris flows.
资助项目	WSL ; 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] ; Project of China Railway Eryuan Engineering Group Co. Ltd[K2018G060-1] ; Canton Valais
WOS关键词	ILLGRABEN ; DESIGN ; MODEL ; FIELD
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000751383000084
资助机构	WSL ; 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 ; Project of China Railway Eryuan Engineering Group Co. Ltd ; Canton Valais
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/56448]
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	Zhang, Zhen; He, Siming
作者单位	1.Univ Utrecht, Dept Phys Geog, Utrecht, Netherlands 2.Swiss Fed Inst Forest Snow & Landscape Res WSL, Birmensdorf, Switzerland 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Swiss Fed Inst Technol, Lab Hydraul Hydrol & Glaciol, Zurich, Switzerland 5.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhen,Walter, Fabian,McArdell, Brian W.,et al. Analyzing Bulk Flow Characteristics of Debris Flows Using Their High Frequency Seismic Signature[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2021,126(12):19.
APA	Zhang, Zhen.,Walter, Fabian.,McArdell, Brian W..,de Haas, Tjalling.,Wenner, Michaela.,...&He, Siming.(2021).Analyzing Bulk Flow Characteristics of Debris Flows Using Their High Frequency Seismic Signature.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,126(12),19.
MLA	Zhang, Zhen,et al."Analyzing Bulk Flow Characteristics of Debris Flows Using Their High Frequency Seismic Signature".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126.12(2021):19.