Analyzing and modeling sub-diffusive transport of bedload along a heterogeneous gravel bed using stochastic and statistical methods

doi:10.1016/j.jhydrol.2020.125697

	Analyzing and modeling sub-diffusive transport of bedload along a heterogeneous gravel bed using stochastic and statistical methods
	Li, ZhiPeng 3,5; Chen, Dong 1,2; Sun, HongGuang 3; Meng, ZhenZhu 5; Zhang, Yong 6; Sibatov, Renat T.4
刊名	JOURNAL OF HYDROLOGY
	2021-05-01
卷号	596 页码:13
关键词	Bedload transport Sub-diffusive Heterogeneous gravel bed Random walk Stochastic model
ISSN号	0022-1694
DOI	10.1016/j.jhydrol.2020.125697
通讯作者	Sun, HongGuang(shg@hhu.edu.cn)
英文摘要	Bedload transport is one of the main mechanisms for sediment transport in rivers. Bedload transport may exhibit anomalous dispersion behavior during the formation of clusters on the surface of a heterogeneous river bed, which cannot be quantified by the classical Fick's law of diffusion. This study simplifies the complex bedload transport process to a "mass-spring-damper" system, which can describe the cluster formation process based on the observed cluster geometry. The simulation results are consistent with the morphology of clusters extracted from the experimental gravel bed in our flume. The level of spatial heterogeneity of individual clusters is characterized to distinguish the planform morphology of each cluster, based on estimation of the HausdorffBesicovitch dimension of the cluster area. Trapping of sediment particles during bedload transport on a heterogeneous gravel bed is quantified using a random walk approach and the birth-death emigration-immigration Markov process. Sub-diffusive dynamics of bedload transport is also modeled simultaneously using the Langevin equation that defines statistical properties of bedload sediments. Further analysis indicates that the microscopic stochastic Langevin equation relates to a macroscopic deterministic equation according to the continuous time random walk (CTRW) theory.
资助项目	National Key R&D Program of China[2017YFC0405203] ; Fundamental Research Funds for the Central Universities[2019B16014] ; National Natural Science Foundation of China[11972148] ; National Natural Science Foundation of China[41931292] ; National Natural Science Foundation of China[51779242] ; China Scholarship Council[201906710077]
WOS关键词	LOAD TRANSPORT ; GRAIN-SIZE ; ANOMALOUS DIFFUSION ; PARTICLE CLUSTERS ; TURBULENT FLOWS ; CLIMATE-CHANGE ; RIVER ; MOTION ; ENTRAINMENT ; DELINEATION
WOS研究方向	Engineering ; Geology ; Water Resources
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000642334400014
资助机构	National Key R&D Program of China ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; China Scholarship Council
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/163917]
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.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Hohai Univ, Coll Mech & Mat, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China 4.Moscow Inst Phys & Technol, Dolgoprudnyi 141701, Russia 5.Ecole Polytech Fed Lausanne, Lab Environm Hydraul, CH-1015 Lausanne, Switzerland 6.Univ Alabama, Dept Geol Sci, Tuscaloosa, AL 35487 USA
推荐引用方式 GB/T 7714	Li, ZhiPeng,Chen, Dong,Sun, HongGuang,et al. Analyzing and modeling sub-diffusive transport of bedload along a heterogeneous gravel bed using stochastic and statistical methods[J]. JOURNAL OF HYDROLOGY,2021,596:13.
APA	Li, ZhiPeng,Chen, Dong,Sun, HongGuang,Meng, ZhenZhu,Zhang, Yong,&Sibatov, Renat T..(2021).Analyzing and modeling sub-diffusive transport of bedload along a heterogeneous gravel bed using stochastic and statistical methods.JOURNAL OF HYDROLOGY,596,13.
MLA	Li, ZhiPeng,et al."Analyzing and modeling sub-diffusive transport of bedload along a heterogeneous gravel bed using stochastic and statistical methods".JOURNAL OF HYDROLOGY 596(2021):13.