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Deriving Debris-Flow Dynamics From Real-Time Impact-Force Measurements

文献类型：期刊论文

作者Yan, Yan5; Tang, Hui6; Hu, Kaiheng2,3; Turowski, Jens M.; Wei, Fangqiang2,3
刊名JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
出版日期2023-03-01
卷号128期号:3页码:e2022JF006715
ISSN号2169-9003
关键词debris flow impact force particle impact model log-logistic distribution dimensionless parameters
DOI10.1029/2022JF006715
文献子类Article
英文摘要Understanding the impact forces exerted by debris flows is limited by a lack of direct field measurements and validated numerical models. In this study, we use real-time impact-force measurements and field observations of debris flows recorded by a sensor network in Jiangjia Ravine, China, to quantify the impact-force distribution of natural debris flows. We observed one debris flow event during and after a storm on 25 August 2004, including 42 short-duration surges and seven long-duration surges, and impact-force signals were successfully recorded for 38 surges. Our observed debris flows comprise high-viscosity laminar flows with high sediment concentration and frequent solid-to-solid interactions. We identified a large magnitude (up to 1 kN), high-frequency (greater than 1 Hz) fluctuating component of the impact force that we interpret as solid particle impact on the sensors. The variability of particle impact forces increases with the mean impact force. Our results show that a log-logistic distribution can describe the probability density distribution of impact forces. Solid-dominated surges and fluid-dominated intersurge flows have similar impact-force distributions, but surges usually have heavy tails. We created a dimensionless number to describe the impact force and correlated it against existing dimensionless parameters. Finally, we develop a simple particle impact model to understand the relationship between flow dynamics and the impact force inside debris flows that could be applied to improve debris-flow flume experiments and design debris-flow hazard mitigation measures.
学科主题Geology
WOS关键词ILLGRABEN CATCHMENT ; FIELD OBSERVATIONS ; SEDIMENT TRANSFER ; TORRENT ; RUNOFF ; INITIATION ; PRESSURE ; DESIGN ; WATER ; MASS
语种英语
出版者AMER GEOPHYSICAL UNION
源URL[http://ir.igsnrr.ac.cn/handle/311030/193521]  
专题生态系统网络观测与模拟院重点实验室_外文论文
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China
2.German Res Ctr Geosci GFZ, Sect 4 7 Earth Surface Proc Modelling, Potsdam, Germany
3.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu, Peoples R China
4.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China
5.Southwest Jiaotong Univ, Sch Civil Engn, Key Lab High Speed Railway Engn, MOE, Chengdu, Peoples R China
6.Yan, Yan; Turowski, Jens M.] German Res Ctr Geosci GFZ, Sect 4 6 Geomorphol, Potsdam, Germany
推荐引用方式
GB/T 7714		 Yan, Yan,Tang, Hui,Hu, Kaiheng,et al. Deriving Debris-Flow Dynamics From Real-Time Impact-Force Measurements[J]. JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,2023,128(3):e2022JF006715.
APA Yan, Yan,Tang, Hui,Hu, Kaiheng,Turowski, Jens M.,&Wei, Fangqiang.(2023).Deriving Debris-Flow Dynamics From Real-Time Impact-Force Measurements.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,128(3),e2022JF006715.
MLA Yan, Yan,et al."Deriving Debris-Flow Dynamics From Real-Time Impact-Force Measurements".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 128.3(2023):e2022JF006715.

入库方式： OAI收割

来源：地理科学与资源研究所

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