DOI: 10.1002/2014GL062322
论文题名: Experimental evidence for turbulent sediment flux constituting a large portion of the total sediment flux along migrating sand dunes
作者: Naqshband S. ; Ribberink J.S. ; Hurther D. ; Barraud P.A. ; Hulscher S.J.M.H.
刊名: Geophysical Research Letters
ISSN: 0094-9484
EISSN: 1944-9215
出版年: 2014
卷: 41, 期: 24 起始页码: 8870
结束页码: 8878
语种: 英语
英文关键词: acoustic measurements
; bed load and suspended load
; turbulent sediment fluxes
Scopus关键词: Frequency estimation
; Rivers
; Sediment transport
; Sediments
; Accurate estimation
; Acoustic measurements
; Experimental evidence
; High frequency dynamics
; Sediment flux
; Suspended loads
; Suspended sediment flux
; Turbulent intensities
; Suspended sediments
; bedload
; dune
; flux measurement
; instrumentation
; sediment transport
; suspended sediment
; turbulence
英文摘要: Accurate estimation of sediment transport is critical for many fluvial processes but remains challenging due to high-frequency dynamics. Using novel acoustic flow instrumentation, we quantified the contribution of turbulent bed and suspended sediment fluxes to the total sediment fluxes along an entire dune profile and over the full flow depth. We found that over the dune stoss side and in the bed load layer, the turbulent mean streamwise flux is negative and reaches up to 40% of the total mean streamwise flux. Over the lee side, where turbulent intensities are highest, the contribution of the turbulent mean streamwise flux to the total mean streamwise flux is larger and reaches up to 50%. The mean vertical turbulent flux along the entire dune bed and in the bed load layer reaches nearly 30% of the total mean vertical flux. Turbulent sediment flux may thus constitute a large component of the total flux. Key Points Sediment flux measurements are presented with an acoustic flow instrumentationTurbulent bed and suspended sediment fluxes are quantified along migrating dunes ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921890328&doi=10.1002%2f2014GL062322&partnerID=40&md5=a81930c951234ede2808e7d13112873f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6748
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil Engineering and Water Engineering and Management, University of Twente, Enschede, Netherlands
Recommended Citation:
Naqshband S.,Ribberink J.S.,Hurther D.,et al. Experimental evidence for turbulent sediment flux constituting a large portion of the total sediment flux along migrating sand dunes[J]. Geophysical Research Letters,2014-01-01,41(24).