Experimental study on the initiation mechanism of debris flow dry heads
文献类型：期刊论文
| 作者 | Liang, Shizhengxiong2,3; Chen, Dong2,3; Lai, Zhiqiang4,5; Song, Dongri3,6; Cui, Yifei1,7 |
| 刊名 | LANDSLIDES
 |
| 出版日期 | 2025-12-20 |
| 卷号 | N/A |
| 关键词 | Experiments Debris flow Dry heads Pebble dynamics High-speed photography |
| ISSN号 | 1612-510X |
| DOI | 10.1007/s10346-025-02644-2 |
| 产权排序 | 1 |
| 文献子类 | Article ; Early Access |
| 英文摘要 | Through statistical analysis of pebble dynamics in debris flow heads, this study aims to uncover the underlying mechanisms governing the formation and maintenance of dry heads, which are more destructive than the tails. Laboratorial experiments were conducted using a custom flume with adjustable slopes, and the movement of pebbles was traced through high-speed photography. The two-phase debris flows were concocted by utilizing mixed-size spherical artificial pebbles and incorporating transparent fluids with varying viscosities and rheological properties. Our findings indicate that the debris flows manifest dry-head and hydrated-tail architectures only in scenarios characterized by steep slopes and low fluid viscosity (i.e., slope > 20 degrees, fluidity index < 0.49, and consistency < 0.75). Upon partitioning the heads into saturated, near-bed dry, and air regions, our statistical analysis reveals that the pebbles in the saturated regions can replenish dry heads via both saturated-dry and saturated-air-dry paths. The widely accepted circulation pattern can be considered a case of the dual-path mode. Furthermore, we found that the particle-size segregation is not essential for the formation of dry heads, and the upward coarsening process may occur in the air regions resulting in inverse gradation. The results provide valuable insights into the dynamics characteristics of debris flow, which can facilitate engineers in preventing and mitigating debris flow disasters in mountainous regions. |
| URL标识 | 查看原文 |
| WOS关键词 | PARTICLE-SIZE SEGREGATION ; GRAIN-SIZE ; MOBILITY ; TORRENT ; MODEL |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001643697900001 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/219426]  |
| 专题 | 陆地水循环及地表过程院重点实验室_外文论文 |
| 通讯作者 | Chen, Dong; Lai, Zhiqiang |
| 作者单位 | 1.Minist Water Resources, Key Lab Hydrosphere Sci, Beijing 100084, Peoples R China 2.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; 4.Yellow River Conservancy Commiss, Yellow River Inst Hydraul Res, Zhengzhou 450003, Peoples R China; 5.Minist Water Resources, Key Lab Lower Yellow River Channel & Estuary Regul, Zhengzhou 450003, Peoples R China; 6.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610029, Peoples R China; 7.Tsinghua Univ, Dept Hydraul Engn, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Liang, Shizhengxiong,Chen, Dong,Lai, Zhiqiang,et al. Experimental study on the initiation mechanism of debris flow dry heads[J]. LANDSLIDES,2025,N/A. |
| APA | Liang, Shizhengxiong,Chen, Dong,Lai, Zhiqiang,Song, Dongri,&Cui, Yifei.(2025).Experimental study on the initiation mechanism of debris flow dry heads.LANDSLIDES,N/A. |
| MLA | Liang, Shizhengxiong,et al."Experimental study on the initiation mechanism of debris flow dry heads".LANDSLIDES N/A(2025). |
入库方式： OAI收割
来源：地理科学与资源研究所
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