Articles | Volume 12, issue 1
https://doi.org/10.5194/esurf-12-11-2024
https://doi.org/10.5194/esurf-12-11-2024
Research article
 | 
05 Jan 2024
Research article |  | 05 Jan 2024

Bedload transport fluctuations, flow conditions, and disequilibrium ratio at the Swiss Erlenbach stream: results from 27 years of high-resolution temporal measurements

Dieter Rickenmann

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An, C., Hassan, M. A., Ferrer-Boix, C., and Fu, X.: Effect of stress history on sediment transport and channel adjustment in graded gravel-bed rivers, Earth Surf. Dynam., 9, 333–350, https://doi.org/10.5194/esurf-9-333-2021, 2021. 
Ancey, C.: Bedload transport: a walk between randomness and determinism. Part 1. The state of the art, J. Hydraul. Res., 58, 1–17, https://doi.org/10.1080/00221686.2019.1702594, 2020a. 
Ancey, C.: Bedload transport: a walk between randomness and determinism. Part 2. Challenges and prospects, J. Hydraul. Res., 58, 18–33, https://doi.org/10.1080/00221686.2019.1702595, 2020b. 
Ancey, C. and Pascal, I.: Estimating mean bedload transport rates and their uncertainty, J. Geophys. Res.-Earth, 125, e2020JF005534, https://doi.org/10.1029/2020JF005534, 2020. 
Bathurst, J. C.: Effect of coarse surface layer on bed-load transport, J. Hydraul. Eng., 133, 1192–1205, https://doi.org/10.1061/(ASCE)0733-9429(2007)133:11(1192), 2007. 
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Short summary
Field measurements of the bedload flux with a high temporal resolution in a steep mountain stream were used to analyse the transport fluctuations as a function of the flow conditions. The disequilibrium ratio, a proxy for the solid particle concentration in the flow, was found to influence the sediment transport behaviour, and above-average disequilibrium conditions – associated with a larger sediment availability on the streambed – substantially affect subsequent transport conditions.
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