Effect of incoming sediment on the transport rate of bed load in mountain streams

Yu, Ge; Wang, Zhaoyin; Kang, Zhuang; Chang, Tung-Chiung; Liu, Huaixiang

doi:10.1016/s1001-6279(10)60002-9

Cited by 40 publications

(30 citation statements)

References 16 publications

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“…While, on the other hand, the sediment transport equations should be used with the representative diameter of the transported-bed-load, called "travelling bed-load" (sensu. Yu et al 2009). The method has been validated with independent data sets (Piton and Recking, in prep.…”

Section: Friction Law Equationmentioning

confidence: 99%

Can bed-load help to validate hydrology studies in mountainous catchment? The case study of the Roize (Voreppe, France)

2016

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Abstract. Larges uncertainties are attached to hazard prediction in mountain streams, because of some limitations in our knowledge of physical processes, and overall, because of the lack of measurements for validation. This is particularly true for hydrological data, making the hydrology assessment of a mountain river a very difficult task, usually associated with large uncertainties. On the other hand, contrarily to lowland rivers, bed-load in mountain streams is often trapped in mitigation-structures, such as open check dams. This study aims to take advantage of these additional information for compensating the general lack of hydrological data, in order to converge toward a comprehensive diagnosis of the catchment hydrological behavior. A hydrology and sediment transport study has been done on the Roize torrent (16.1-km² -Voreppe -38-FR). After a classical historical study, a regional analysis of raingauges and water-discharge-stations situated in the calcareous north Pre-Alps massifs of the Vercors, Chartreuse and Bauges has been done. A catchment geomorphology study has been performed to get insight about the Roize torrential activity and sediment transport. The volumes of bed-load transported each year on average and during extreme floods have been computed using the estimated hydrology. The good bed-load predictions compare to the volume dredged in the Voreppe sediment trap are considered an indirect validation of the hydrology study.

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Section: Friction Law Equationmentioning

confidence: 99%

Can bed-load help to validate hydrology studies in mountainous catchment? The case study of the Roize (Voreppe, France)

2016

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“…The opening angle of the deposition area was set to 30°, which is oriented at the opening angle of natural 20 alluvial deposition cones formed by continuous sediment supply (Parker et al, 1998). The here applied barriers resulted from previous experimental analysis (Schwindt et al, 2017a) with a longitudinal channel slope of Sₒ = 5.5 % which can be typically found in co-or non-alluvial mountain rivers Rosgen, 1994;Yu et al, 2009). …”

Section: Deposition Area With Guiding Channelmentioning

confidence: 99%

“…However, the sediment transport in such streams is often driven by the sediment supply from bed-external sources, as long as armour breaking does not occur. In such co-or nonalluvial channels, the fluvial sediment transport can be assessed in terms of the finer "traveling bed load" Yu et al, 2009). The characteristic grain size of the traveling bed load can be estimated by the grain size of sediment 5 bars along the channel banks upstream.…”

mentioning

confidence: 99%

Experimental study of sediment traps permeable for frequent floods

Schwindt

Franca

Reffo

et al. 2017

Preprint

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Abstract. Sediment traps created by partially open torrential barriers are crucial elements for flood protection in alpine regions. 10The trapping of sediment is necessary when intense sediment transport occurs during floods that may endanger urban areas at downstream river reaches. In turn, the unwanted permanent trapping of sediment during small, non-hazardous floods can result in the ecological and morphological depletion of downstream reaches. This study experimentally analyses a new concept for permeable sediment traps. For ensuring the sediment transfer up to small floods, a guiding channel implemented in the deposition area of the sediment trap was studied systematically. The bankfull discharge of the guiding channel corresponds to 15 a dominant morphological discharge. At the downstream end of the guiding channel, a permeable barrier triggers sediment retention and deposition. The permeable barrier consists of a bar screen for mechanical deposition control, superposed to a flow constriction for the hydraulic control. The fail-safe clogging of the barrier and the sediment deposition upstream can be ensured for discharges that are higher than the bankfull discharge of the guiding channel.

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“…There is a limit to the amount of fine grains that can be transported (Fazli et al, 2008;Wang et al, 2008;Ghodsian and Vaghefi, 2009;Yu et al, 2009). Thus, the erosion relation is (Cheng et al, 2000):…”

Section: Erosion Relationmentioning

confidence: 99%

A study on water film in saturated sand

Cui

2010

International Journal of Sediment Research

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Water film can serve as a sliding surface and cause landslides on gentle slopes. The development of "water film" in saturated sand is analyzed numerically and theoretically based on a quasi-three-phase model. It is shown that stable water films initiate and grow if the choking state (where the fluid velocity decreases to near zero) remains steady in a liquefied sand column. Discontinuity can occur in pore water velocity, grain velocity and pore pressure after the initiation of a water film. However, the discontinuity and water film can disappear once the choking state is changed. The key to the formation of water film is the choking in the sand column caused by eroded fine grains.

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Effect of incoming sediment on the transport rate of bed load in mountain streams

Cited by 40 publications

References 16 publications

Can bed-load help to validate hydrology studies in mountainous catchment? The case study of the Roize (Voreppe, France)

Can bed-load help to validate hydrology studies in mountainous catchment? The case study of the Roize (Voreppe, France)

Experimental study of sediment traps permeable for frequent floods

A study on water film in saturated sand

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