Earth Surface Dynamics
Earth Surface Dynamics
ESurf
Articles | Volume 13, issue 6
Articles | Volume 13, issue 6
https://doi.org/10.5194/esurf-13-1229-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-13-1229-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 13, issue 6
Research article
 | 
24 Nov 2025
Research article |  | 24 Nov 2025

Improving a multi-grain-size total sediment load model through a new standardized reference shear stress for incipient motion and an adjusted saltation height description

Marine Le Minor, Dimitri Lague, Jamie Howarth, and Philippe Davy

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Cited articles

Blom, A., Chavarrías, V., Ferguson, R. I., and Viparelli, E.: Advance, retreat, and halt of abrupt gravel-sand transitions in alluvial rivers, Geophysical Research Letters, 44, 9751–9760, https://doi.org/10.1002/2017GL074231, 2017. 
Charru, F.: Selection of the ripple length on a granular bed sheared by a liquid flow, Physics of Fluids, 18, 121508, https://doi.org/10.1063/1.2397005, 2006. 
Charru, F., Mouilleron, H., and Eiff, O.: Erosion and deposition of particles on a bed sheared by a viscous flow, Journal of Fluid Mechanics, 519, 55–80, https://doi.org/10.1017/S0022112004001028, 2004. 
Cheng, N.-S. and Chiew, Y.-M.: Pickup probability for sediment entrainment, Journal of Hydraulic Engineering, 124, 232–235, https://doi.org/10.1061/(ASCE)0733-9429(1998)124:2(232), 1998. 
Cheng, N. S., Wei, M. X., Chiew, Y. M., Lu, Y. S., and Emadzadeh, A.: Combined effects of mean flow and turbulence on sediment pickup rate, Water Resources Research, 56, e2019WR026181, https://doi.org/10.1029/2019WR026181, 2020. 
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In natural rivers, flow variability and sediment heterogeneity affect how sediment grains are transported. A unique law that predicts the total amount of sediment transportable by a river for a wide range of sediment mixtures and flow conditions exists, but unclear trends remain. Two improvements to this law – a standardized onset of sediment transport and a common reference transport height across all sizes – appear to be critical to having a functional multi-grain-size total sediment load.
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