The role of morphology on the displacement of particles in a step–pool river system

Lamarre, Hélène; Roy, Alain

doi:10.1016/j.geomorph.2007.11.005

Cited by 83 publications

(56 citation statements)

References 29 publications

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“…The increase in total F m with increasing flow observed in East Creek agrees with results from other studies ( Wilcock and McArdell, 1993;Wilcock, 1997), as does the power law fit between and metrics of cumulative flow energy Lamarre and Roy, 2008;Haschenburger, 2013;Schneider et al, 2014). Closer examination reveals that the distribution of mobilizing events plays a key role in the mobilization of sediment in East Creek; seasons with multiple events near Q c , and multiple moderate events <Q bf , result in higher F m and values than seasons with a single large event >Q bf .…”

Section: The Role Of Flow On Bed Mobility and Sediment Dispersion Ovesupporting

confidence: 89%

“…Following results from other studies Lamarre and Roy, 2008;Haschenburger, 2013;Schneider et al, 2014), a power relation was fit between , and both Q P and Ω T . To explore the relation between grain size and tracer dispersion, the of each size class was also calculated.…”

Section: Grain Dispersion: Travel Distance and Burialmentioning

confidence: 99%

“…The notion that morphology affects grain mobility is intuitive; if bedforms are created and evolve through the processes of bedload transport, then grains must be displaced in patterns that lead to the development and maintenance of the channel morphology (Hassan, 1992;Pyrce and Ashmore, 2003a ;Kasprak et al, 2015). Indeed, in cases where flow approaches or exceeds channel forming floods, travel distances of grains are associated with the length scale of the dominant bedforms Pyrce and Ashmore, 2003a;2003b;Lamarre and Roy, 2008;Bradley and Tucker, 2012;Kasprak et al, 2015). This has been directly linked to bar formation and maintenance in both braided and meandering streams (Pyrce and Ashmore, 2003a;Hassan and Bradley, 2015).…”

Section: Introductionmentioning

confidence: 99%

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The role of channel morphology on the mobility and dispersion of bed sediment in a small gravel‐bed stream

Papangelakis

Hassan

2016

Earth Surf Processes Landf

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HIGHLIGHTS A unique 10-year tracer data set was used to capture large temporal and spatial variation in bed mobility in a small gravel bed stream.  Bed mobility was highly localized and sporadic, with a low sediment transport rate that remains near critical.  The effects of bed channel morphology on bed mobility was scale dependent.  The variation in bed mobility and its relation to channel morphology and bed shear stress is linked bedform maintenance and channel stability. ABSTRACTThis study uses a unique 10-year tracer dataset from a small gravel bed stream to This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1002/esp.3980This article is protected by copyright. All rights reserved.examine bed mobility and sediment dispersion over long timescales and at a range of spatial scales. Seasonal tracer data that captured multiple mobilizing events was examined, while the effects of morphology on bed mobility and sediment dispersion were captured at three spatial scales: within morphological units (unit scale), between morphological units (reach scale) and between reaches with different channel morphologies (channel scale). This was achieved by analyzing both reachaverage mobility and travel distance data, as well as the development of 'mobility maps' that capture the spatial variability in tracer mobility within the channel. The tracer data suggest that sediment transport in East Creek remains near critical the majority of the time, with only rare large events resulting in high mobility rates and grain travel distances large enough to move sediment past dominant bedforms.While a variable capturing both the magnitude and frequency of flow events within a season yielded a better predictor to sediment mobility and dispersion than peak discharge alone, the distribution of events of different magnitude within the season played a large role in determining tracer mobility rates and travel distances. The effects of morphology differed depending on the analysis scale, demonstrating the importance of scale, and therefore study design, when examining the effect of morphology on sediment transport.

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Section: The Role Of Flow On Bed Mobility and Sediment Dispersion Ovesupporting

confidence: 89%

Section: Grain Dispersion: Travel Distance and Burialmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The role of channel morphology on the mobility and dispersion of bed sediment in a small gravel‐bed stream

Papangelakis

Hassan

2016

Earth Surf Processes Landf

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“…With this technique, tracers can be found and identified by their unique identification code without handling the particles and disturbing the bed. Until now, most of these studies have been based on observation of isolated events or on surveys spanning only a few years (Lamarre et al, 2005;Lamarre and Roy, 2008;Houbrechts et al, 2012;Liébault et al, 2012;Chapuis et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of long-term bedload virtual velocity in gravel-bed rivers (Ardenne, Belgium)

et al. 2015

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“…Step-pool systems not only affect flow resistance, they also affect sediment transport (Marston 1982, Whittaker 1987, Rosport and Dittrich 1995, Lenzi 2004, Lamarre and Roy 2008. However, the energy dissipation role can be impaired if pools become filled with sediment (Whittaker and Jaeggi 1982).…”

Section: Introductionmentioning

confidence: 99%

Restoration of an incised mountain stream using artificial step-pool system

Wang

Kang

et al. 2010

Journal of Hydraulic Research

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The role of morphology on the displacement of particles in a step–pool river system

Cited by 83 publications

References 29 publications

The role of channel morphology on the mobility and dispersion of bed sediment in a small gravel‐bed stream

The role of channel morphology on the mobility and dispersion of bed sediment in a small gravel‐bed stream

Evaluation of long-term bedload virtual velocity in gravel-bed rivers (Ardenne, Belgium)

Restoration of an incised mountain stream using artificial step-pool system

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