DOI: 10.1002/2017JF004504
Scopus记录号: 2-s2.0-85046273942
论文题名: Turbulence as the Main Driver of Resuspension in Oscillatory Flow Through Vegetation
作者: Tinoco R.O. ; Coco G.
刊名: Journal of Geophysical Research: Earth Surface
ISSN: 21699003
出版年: 2018
卷: 123, 期: 5 起始页码: 891
结束页码: 904
语种: 英语
英文关键词: aquatic vegetation
; oscillatory flow
; resuspension
; sediment transport
; turbulence
; waves
Scopus关键词: accuracy assessment
; experimental study
; kinetic energy
; laboratory method
; oscillating flow
; resuspension
; sediment transport
; suspended sediment
; turbulence
; vegetation
英文摘要: A series of laboratory experiments was conducted using arrays of rigid cylinders in a sandy bed as a proxy for mangrove roots and benthos. Synchronous colocated measurements of velocity and suspended sediment concentration were recorded within the array to investigate the effect of array density on sediment resuspension under different wave conditions. The measured increase in turbulent kinetic energy resulting from flow-vegetation interactions is directly linked to the observed increase in sediment resuspension. The observations emphasize the role of turbulent kinetic energy generated by the flow-vegetation interactions, rather than bed shear stress by the mean velocity, as the main driver of resuspension within the array. We test a modified Shields parameter analysis, as well as analytical predictions previously developed for unidirectional currents, which accurately predict resuspension thresholds under oscillatory flow conditions. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114008
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, United States; School of Environment, The University of Auckland, Auckland, New Zealand
Recommended Citation:
Tinoco R.O.,Coco G.. Turbulence as the Main Driver of Resuspension in Oscillatory Flow Through Vegetation[J]. Journal of Geophysical Research: Earth Surface,2018-01-01,123(5)