Dynamics of Dual-Mode Bedload Transport With Three-Dimensional Alternate Bars Migration in Subcritical Flow: Experiments and Model Analysis
文献类型：期刊论文
| 作者 | Li, ZhiPeng1,2,3; Oshtorjani, Mehrdad Kiani3; Chen, Dong4,5; Zhang, Yong6; Sun, HongGuang1,7 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
 |
| 出版日期 | 2023-03-01 |
| 卷号 | 128期号:3页码:21 |
| 关键词 | bedload transport waiting time dual-mode behavior hyperexponential distribution CTRW heavy-tailed dynamics |
| ISSN号 | 2169-9003 |
| DOI | 10.1029/2022JF006882 |
| 通讯作者 | Sun, HongGuang(shg@hhu.edu.cn) |
| 英文摘要 | Bedload transport often exhibits dual-mode behavior due to interactions of spatiotemporal controlling factors with the migrating three-dimensional bedforms (characterized by the fully developed patterns in the bed, such as alternate bars, pools, and clusters). This study explores dual-mode bedload transport based on experimental measurements and develops Einstein's exponential-based model to characterize large fluctuations of bedload sediment discharge. The particle waiting time, particle flux, and bed elevation are measured in a series of well-controlled laboratory experiments. Flume experiments show that the waiting time distribution of sediments gives a bimodal characteristic, two distinct modes can be identified from the measured data. This study encapsulates this dual-mode bedload transport behavior in a hyperexponential distribution of sediment resting times and introduces it into the continuous time random walk (CTRW) framework. Considering the scaling limit of the thin/heavy-tailed CTRW processes, a single-rate mass transfer (SRMT) and fractional-derivative SRMT (F-SRMT) models are obtained, and the model parameters are determined from the hyperexponential distribution. Further analyses reveal that the dual-mode bedload transport behavior is controlled by mass exchange between the mobile and immobile zones, and a dimensionless index ? can quantify the intensity of dual-mode behavior. Applications show that the dual-mode bedload transport models are much more accurate in characterizing bedload transport in a mixed-size gravel bed than the traditional exponential-based model, and the nonlocal movement of bedload sediments is significant in the mixed-size gravel bed. Further investigations will focus on the applicability test of the dual-mode models to other flow regimes and conditions. |
| WOS关键词 | BED-LOAD TRANSPORT ; SEDIMENT TRANSPORT ; ANOMALOUS DIFFUSION ; BEHAVIOR ; TIME ; DISPERSION ; MOTION |
| 资助项目 | National Key R amp; D Program of China[2022YFC3202602] ; Fundamental Research Funds for the Central Universities[B210202092] ; Postgraduate Research amp; Practice Innovation Program of Jiangsu Province[KYCX21_0456] ; China Postdoctoral Science Foundation[2022M711024] ; National Natural Science Foundation of China[11972148] ; National Natural Science Foundation of China[52279077] ; Natural Science Foundation of Jiangsu Province[BK20190024] ; Jiangsu Funding Program for Excellent Postdoctoral Talent[2022ZB180] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001011960200020 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Key R amp; D Program of China ; Fundamental Research Funds for the Central Universities ; Postgraduate Research amp; Practice Innovation Program of Jiangsu Province ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; Natural Science Foundation of Jiangsu Province ; Jiangsu Funding Program for Excellent Postdoctoral Talent |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/195606]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Sun, HongGuang |
| 作者单位 | 1.Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul Eng, Nanjing, Peoples R China 2.Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing, Peoples R China 3.Ecole Polytech Fed Lausanne, Lab Environm Hydraul, Lausanne, Switzerland 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China 5.Univ Chinese Acad Sci, Beijing, Peoples R China 6.Univ Alabama, Dept Geol Sci, Tuscaloosa, AL USA 7.Hohai Univ, Coll Mech & Mat, Nanjing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, ZhiPeng,Oshtorjani, Mehrdad Kiani,Chen, Dong,et al. Dynamics of Dual-Mode Bedload Transport With Three-Dimensional Alternate Bars Migration in Subcritical Flow: Experiments and Model Analysis[J]. JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,2023,128(3):21. |
| APA | Li, ZhiPeng,Oshtorjani, Mehrdad Kiani,Chen, Dong,Zhang, Yong,&Sun, HongGuang.(2023).Dynamics of Dual-Mode Bedload Transport With Three-Dimensional Alternate Bars Migration in Subcritical Flow: Experiments and Model Analysis.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,128(3),21. |
| MLA | Li, ZhiPeng,et al."Dynamics of Dual-Mode Bedload Transport With Three-Dimensional Alternate Bars Migration in Subcritical Flow: Experiments and Model Analysis".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 128.3(2023):21. |
入库方式： OAI收割
来源：地理科学与资源研究所
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