The influence of temporal and spatial variations on phase separation in debris flow deposition
文献类型：期刊论文
| 作者 | Wang, Fei1 ; Wang, Jiading1; Chen, Xiaoqing2; Chen, Jiangang2
|
| 刊名 | LANDSLIDES
 |
| 出版日期 | 2019-03-01 |
| 卷号 | 16期号:3页码:497-514 |
| 关键词 | Debris flow Peak discharge Flow density Experimental analysis Deceleration baffles |
| ISSN号 | 1612-510X |
| DOI | 10.1007/s10346-018-1119-5 |
| 通讯作者 | Wang, Jiading(wangjd@nwu.edu.cn) |
| 英文摘要 | The phase separation mechanism in a natural debris flow as a solid-liquid mixture is an important aspect in its movement and deposition. In this paper, the relationship between debris flow discharges and densities is studied based on the field observations of the Jiangjia Gully, China. A number of experiments are conducted to study the phase separation mechanism of debris flows, and the characteristics of their depositions over deceleration baffles with varying flow density and bottom slopes. The phase separation mechanism of natural debris flows is analyzed based on the mentioned experimental and field observations. During the decreasing debris flow, the flow density reduces with reduction of the flow discharge, indicating the important role of the flow discharge in changing the flow density as a driving factor. Temporal variations of the debris flow density can have two chronological orders: (a) dilute-viscous-dilute debris flow and (b) viscous-dilute debris flow. The variation order of the flow density has an important influence on the phase separation mechanism and the final deposition morphology. The experimental results show that the bottom slope and the flow density have opposite effects on the phase separation mechanism. Increasing the flow density increases the viscosity of the debris flow, decreasing the phase separation of the solid-liquid mixture. Increasing the bottom slope promotes phase separation by increasing the shear rate inside the debris flow. As a result, the phase separation mechanism of natural debris flow is mostly related to the temporal and spatial variations of the flow pattern and the flow density. |
| WOS关键词 | LABORATORY ANALYSIS ; FIELD ; MITIGATION ; VELOCITY ; CHANNEL ; RUNOUT ; SEGREGATION ; MECHANISMS ; INITIATION ; DOLOMITES |
| 资助项目 | National Natural Science Foundation of China[41630639] ; National Natural Science Foundation of China[41807252] ; National Key Research and Development Plan[2018YFC1504703] ; International Cooperation and Exchange of the National Science Foundation of China[41661144028] ; China Postdoctoral Science Foundation[2018M633558] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000461573100004 |
| 出版者 | SPRINGER HEIDELBERG |
| 资助机构 | National Natural Science Foundation of China ; National Key Research and Development Plan ; International Cooperation and Exchange of the National Science Foundation of China ; China Postdoctoral Science Foundation |
| 源URL | [http://ir.imde.ac.cn/handle/131551/25303]  |
| 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 | Wang, Jiading |
| 作者单位 | 1.Northwest Univ, State Key Lab Continental Dynam, Dept Geol, Xian 710069, Shaanxi, Peoples R China 2.Chinese Acad Sci, CAS Key Lab Mt Hazards & Earth Surface Proc, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Fei,Wang, Jiading,Chen, Xiaoqing,et al. The influence of temporal and spatial variations on phase separation in debris flow deposition[J]. LANDSLIDES,2019,16(3):497-514. |
| APA | Wang, Fei,Wang, Jiading,Chen, Xiaoqing,&Chen, Jiangang.(2019).The influence of temporal and spatial variations on phase separation in debris flow deposition.LANDSLIDES,16(3),497-514. |
| MLA | Wang, Fei,et al."The influence of temporal and spatial variations on phase separation in debris flow deposition".LANDSLIDES 16.3(2019):497-514. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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