气候变化领域集成服务门户(CCPortal): Turbulence and Bed Load Transport in Channels With Randomly Distributed Emergent Patches of Model Vegetation

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DOI	10.1029/2020GL087055
	Turbulence and Bed Load Transport in Channels With Randomly Distributed Emergent Patches of Model Vegetation
	Shan Y.; Zhao T.; Liu C.; Nepf H.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:12
英文摘要	Laboratory experiments explored the impact of vegetation patchiness on channel-averaged turbulence and sediment transport. Stems were clustered into 16 randomly distributed circular patches of decreasing diameter. For the same channel velocity, the sediment transport increased with total stem number but decreased as stems were clustered into smaller patch diameters, occupying a smaller fraction of the bed area. The channel-averaged turbulence, which also declined with increased clustering, was shown to be a good predictor for sediment transport at the channel scale. Previous models for uniform vegetation were adapted to predict both the channel-averaged turbulence and sediment transport as a function of the total number of stems and degree of clustering, represented by the fraction of bed covered by patches. This provides a way for numerical modelers to represent the impact of subgrid-scale vegetation patchiness on sediment transport. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Sedimentation; Turbulence; Vegetation; Bed-load transport; Channel velocity; Circular Patch; Degree of clustering; Laboratory experiments; Randomly distributed; Stem numbers; Subgrid scale; Sediment transport; bedload; channel flow; model validation; patchiness; sediment transport; turbulence; vegetation structure
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170254
作者单位	College of Applied Mathematics, Chengdu University of Information Technology, Chengdu, China; Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States; State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, China
推荐引用方式 GB/T 7714	Shan Y.,Zhao T.,Liu C.,et al. Turbulence and Bed Load Transport in Channels With Randomly Distributed Emergent Patches of Model Vegetation[J],2020,47(12).
APA	Shan Y.,Zhao T.,Liu C.,&Nepf H..(2020).Turbulence and Bed Load Transport in Channels With Randomly Distributed Emergent Patches of Model Vegetation.Geophysical Research Letters,47(12).
MLA	Shan Y.,et al."Turbulence and Bed Load Transport in Channels With Randomly Distributed Emergent Patches of Model Vegetation".Geophysical Research Letters 47.12(2020).