A field experiment on the development of sedimentary structures in a gravel‐bed river

Lamarre, Hélène; Roy, Alain

doi:10.1002/esp.1602

Cited by 43 publications

(36 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Channel morphology does not only influence particle pathways, but the latter also contributes to the maintenance of bedforms (Sear, ; Milan et al, ; Lamarre and Roy, ; Milan, ). Our results highlight some differences between SP and RP channels in the way moving gravels interact with macroforms.…”

Section: Discussionmentioning

confidence: 99%

Particle transport in gravel‐bed rivers: Revisiting passive tracer data

Vázquez‐Tarrío

Recking

Liébault

et al. 2018

Earth Surf Processes Landf

View full text Add to dashboard Cite

Data from tracer experiments were compiled and analysed in order to explore the role of geomorphological, hydrological and sedimentological constraints on fluvial gravel transport in gravel‐bed rivers. A large data set from 217 transport episodes of tagged stones were compiled from 33 scientific papers. Our analyses showed that while magnitude of peak discharge is a major control on gravel transport and mobility, tracer travel distances show some scale dependence on the morphological configuration of the channel. Our results also highlight differences in the way tracers are displaced between step–pool and riffle and pool channels. The riffle–pool sequence seems to be a more efficient trap for travelling gravels than the step–pool pair. In addition, in step–pool channels there are clear differences in tracer transport between observations of first displacements after tracer seeding (unconstrained‐stone conditions), and second and subsequent observations of tracer displacements (constrained‐stone conditions). The comparison between tracer experiments under constrained conditions and those under unconstrained conditions also highlights the importance of bed state and structures in gravel mobility. The results of this study confirm that sediment transport in gravel‐bed rivers is a complex process, whereby sedimentological and geomorphological controls are superimposed on the hydraulic forcing. © 2018 John Wiley & Sons, Ltd.

show abstract

Section: Discussionmentioning

confidence: 99%

Particle transport in gravel‐bed rivers: Revisiting passive tracer data

Vázquez‐Tarrío

Recking

Liébault

et al. 2018

Earth Surf Processes Landf

View full text Add to dashboard Cite

show abstract

“…Examining passive tracers in the field introduces an ambiguity; one measures particle displacement -i.e., the distance a particle travels between successive surveys of its position -but this displacement is composed of an unknown number of steps and rests. Displacement length distributions measured for individual floods, and at longer timescales over many floods, typically follow exponential or gamma-like distributions (Hassan et al, 1991;Schmidt and Ergenzinger, 1992;Habersack, 2001;Lamarre and Roy, 2008;Bradley and Tucker, 2012;Hassan et al, 2013;Phillips et al, 2013). We propose two simple limits for particle displacement during a flood: (1) the lower limit is that a particle executes a single step, with a characteristic length scale predicted by Eq.…”

Section: Sediment Transport At the Particle Scalementioning

confidence: 99%

Dynamics and mechanics of bed-load tracer particles

Phillips

Jerolmack

2014

Earth Surf. Dynam.

View full text Add to dashboard Cite

Abstract. Understanding the mechanics of bed load at the flood scale is necessary to link hydrology to landscape evolution. Here we report on observations of the transport of coarse sediment tracer particles in a cobblebedded alluvial river and a step-pool bedrock tributary, at the individual flood and multi-annual timescales. Tracer particle data for each survey are composed of measured displacement lengths for individual particles, and the number of tagged particles mobilized. For single floods we find that measured tracer particle displacement lengths are exponentially distributed; the number of mobile particles increases linearly with peak flood Shields stress, indicating partial bed load transport for all observed floods; and modal displacement distances scale linearly with excess shear velocity. These findings provide quantitative field support for a recently proposed modeling framework based on momentum conservation at the grain scale. Tracer displacement is weakly negatively correlated with particle size at the individual flood scale; however cumulative travel distance begins to show a stronger inverse relation to grain size when measured over many transport events. The observed spatial sorting of tracers approaches that of the river bed, and is consistent with size-selective deposition models and laboratory experiments. Tracer displacement data for the bedrock and alluvial channels collapse onto a single curve -despite more than an order of magnitude difference in channel slope -when variations of critical Shields stress and flow resistance between the two are accounted for. Results show how bed load dynamics may be predicted from a record of river stage, providing a direct link between climate and sediment transport.

show abstract

“…RFID transponders are resistant to shock and temperature fluctuations (Texas Instruments, ). When properly installed in natural or artificial rocks, recovery rates can remain high even after multiple years in harsh environments (Lamarre and Roy, , ; Biron et al , ; Houbrechts et al , ). Reduced transponder size now allows tagging of smaller particles, increasing the size range of sediment particles that can be tracked (Allan et al , ; Texas Instruments, ; see also Table ).…”

Section: Introductionmentioning

confidence: 99%

Detection ranges and uncertainty of passive Radio Frequency Identification (RFID) transponders for sediment tracking in gravel rivers and coastal environments

Chapuis

Bright

Hufnagel

et al. 2014

Earth Surf Processes Landf

View full text Add to dashboard Cite

Since the earliest use of this technology, a growing number of researchers have employed passive Radio Frequency Identification (RFID) transponders to track sediment transport in gravel rivers and coastal environments. RFID transponders are advantageous because they are inexpensive, durable and use unique codes that allow sediment particle mobility and displacement to be assessed on a clast-by-clast basis. Despite these advantages, this technology is in need of a rigorous error and detection analysis. Many studies work with a precision of~1 m, which is insufficient for some applications, and signal shadowing can occur due to clustering of tagged particles. Information on in-field performance is also incomplete with respect to burial and submergence, especially for different transponders and antennae combinations. The objectives of this study are to qualify and quantify the factors that influence the detection zone of RFID tracers including antenna type, transponder size, transponder orientation, burial depth, submergence and clustering. Results of this study show that the detection zone is complex in shape due to a set of lobes in the detection field and provide a better understanding of transponder detection shape for different RFID transponder/antenna combinations. This study highlights a strong influence of clustering and submergence, but no significant effect of burial. Finally we propose standard operating procedures for tagging and tracking in rivers and coastal environments.

show abstract

A field experiment on the development of sedimentary structures in a gravel‐bed river

Cited by 43 publications

References 37 publications

Particle transport in gravel‐bed rivers: Revisiting passive tracer data

Particle transport in gravel‐bed rivers: Revisiting passive tracer data

Dynamics and mechanics of bed-load tracer particles

Detection ranges and uncertainty of passive Radio Frequency Identification (RFID) transponders for sediment tracking in gravel rivers and coastal environments

Contact Info

Product

Resources

About