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DOI	10.1016/j.geomorph.2021.107682
	Direct, continuous measurements of ultra-high sediment fluxes in a sandy gravel-bed ephemeral river
	Stark, Kyle; Cadol, Daniel; Varyu, David; Laronne, Jonathan B.
通讯作者	Stark, K (corresponding author), New Mexico Inst Min & Technol, Earth & Environm Sci, Socorro, NM 87801 USA.
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2021
卷号	382
英文摘要	A dearth of field measurements exists from sandy gravel-bed rivers. Laboratory experiments suggest that sediment mixtures with a large sand component are particularly efficient at transporting bedload downstream. To evaluate transport processes in these environments, we constructed a sediment monitoring research facility with the ability to continuously monitor sediment fluxes. The Arroyo de los Pinos is a gravel-bed ephemeral channel with a large (>30%) sand component in New Mexico, USA. This field station incorporates direct measurements of bedload flux using Reid-type slot samplers with high quality measurements of suspended sediment, water depth, water velocity, and grain size. Measurements are collected at a stable cross section constructed for long-term, consistent monitoring. Instantaneous bedload flux is high compared to global averages, as high as 12 kg s(-1)m(-1). Suspended sediment is also high, peaking at 100,000 mg L-1, with evidence of clockwise hysteresis. The Pinos nondimensional bedload flux rates are similar to those in other ephemeral channels, but the high sand content allows equal mobility at relatively shallow water depths and high rates of bedload transport during hydrograph recession. Bedload flux responded hysteretically, higher at equal shear stresses during stage rise. This is likely caused by an inadequate use of the depth-slope product for calculation of bed shear, steeper friction slopes during the rising limb, or both. These first monitored sediment transporting flash flood events reveal a channel that is very active during short periods of time. On average, the Arroyo de los Pinos flows 12-24 h during 3-5 events every year. However, in these brief periods, the channel is hyper-efficient at transporting bedload and suspended sediment at rates that are orders of magnitude higher than perennial counterparts. (c) 2021 Published by Elsevier B.V.
英文关键词	Bedload transport Ephemeral Suspended sediment Gravel-bed river Sediments
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000640374900001
WOS关键词	GRAIN-SIZE DISTRIBUTION ; SUSPENDED SEDIMENT ; CONVECTIVE RAINFALL ; BEDLOAD TRANSPORT ; FLASH-FLOODS ; HIGH-RATES ; LOAD ; DISCHARGE ; DESERT ; STATISTICS
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	Ben-Gurion University of the Negev
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350411
作者单位	[Stark, Kyle; Cadol, Daniel] New Mexico Inst Min & Technol, Earth & Environm Sci, Socorro, NM 87801 USA; [Varyu, David] US Bur Reclamat, Tech Serv Ctr, Denver, CO 80225 USA; [Laronne, Jonathan B.] Ben Gurion Univ Negev, Dept Geog, Beer Sheva, Israel
推荐引用方式 GB/T 7714	Stark, Kyle,Cadol, Daniel,Varyu, David,et al. Direct, continuous measurements of ultra-high sediment fluxes in a sandy gravel-bed ephemeral river[J]. Ben-Gurion University of the Negev,2021,382.
APA	Stark, Kyle,Cadol, Daniel,Varyu, David,&Laronne, Jonathan B..(2021).Direct, continuous measurements of ultra-high sediment fluxes in a sandy gravel-bed ephemeral river.GEOMORPHOLOGY,382.
MLA	Stark, Kyle,et al."Direct, continuous measurements of ultra-high sediment fluxes in a sandy gravel-bed ephemeral river".GEOMORPHOLOGY 382(2021).