DOI: 10.1002/2013GL058299
论文题名: Quantified turbulent diffusion of suspended sediment using acoustic Doppler current profilers
作者: Sassi M.G. ; Hoitink A.J.F. ; Vermeulen B.
刊名: Geophysical Research Letters
ISSN: 0094-8387
EISSN: 1944-8118
出版年: 2013
卷: 40, 期: 21 起始页码: 5692
结束页码: 5697
语种: 英语
英文关键词: ADCP
; eddy viscosity
; Reynolds stress tensor
; sediment diffusivity
; sediment transport
; turbulence
Scopus关键词: Acoustic backscatter
; Acoustic doppler current profiler
; Acoustic Doppler Current Profilers
; ADCP
; Cartesian components
; Eddy viscosity
; Reynolds stress tensors
; Sediment concentration
; Diffusion
; Doppler effect
; Reynolds number
; Sediment transport
; Sedimentation
; Shear flow
; Tensors
; Turbulence
; Suspended sediments
; Acoustic Doppler Current Profiler
; calibration
; concentration (composition)
; eddy covariance
; flux measurement
; momentum
; Reynolds number
; sediment transport
; suspended sediment
; turbulent diffusion
; vertical profile
; viscosity
英文摘要: Collocated profiles of the Reynolds stress tensor and eddy covariance fluxes are obtained to derive vertical profiles of turbulent momentum and sediment diffusivity in a tidal river, using coupled acoustic Doppler current profilers (ADCPs). Shear and normal stresses are obtained by combining the variances in radial velocities measured by the ADCP beams. The covariances between radial velocities and calibrated acoustic backscatter allow the determination of the three Cartesian components of the turbulent flux of suspended sediment. The main advantage of this new approach is that flow velocity and sediment concentration measurements are exactly collocated, and allowing for profiling over longer ranges, in comparison to existing techniques. Results show that vertical profiles of the inverse turbulent Prandtl-Schmidt number are coherent with corresponding profiles of the sediment diffusivity, rather than with profiles of the eddy viscosity. Key Points A new way to monitor eddy diffusivity of suspended river sediment is introduced Sharp peaks observed in vertical profiles of the eddy diffusivity Profiles of turbulent Prandtl-Schmidt number coherent with eddy diffusivity ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887282268&doi=10.1002%2f2013GL058299&partnerID=40&md5=62752fe784f64e1acd4b68b4e8ab6899
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5651
Appears in Collections: 气候减缓与适应
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作者单位: Hydrology and Quantitative Water Management Group, Wageningen University, PO Box 47, Wageningen, NL-6700 AA, Netherlands
Recommended Citation:
Sassi M.G.,Hoitink A.J.F.,Vermeulen B.. Quantified turbulent diffusion of suspended sediment using acoustic Doppler current profilers[J]. Geophysical Research Letters,2013-01-01,40(21).