Articles | Volume 8, issue 3
Earth Surf. Dynam., 8, 717–728, 2020
Earth Surf. Dynam., 8, 717–728, 2020

Short communication 31 Aug 2020

Short communication | 31 Aug 2020

Short communication: Field data reveal that the transport probability of clasts in Peruvian and Swiss streams mainly depends on the sorting of the grains

Fritz Schlunegger et al.

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Revised manuscript not accepted
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Related subject area

Physical: Geomorphology (including all aspects of fluvial, coastal, aeolian, hillslope and glacial geomorphology)
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Cited articles

Bekaddour, T., Schlunegger, F., Attal, M., and Norton, K. P.: Lateral sediment sources and knickzones as controls on spatio-temporal variations of sediment transport in an Alpine river, Sedimentology, 60, 342–357, 2013. 
Bunte, K., Abt, S. R., Swingle, K. W., Cenderelli, D. A., and Schneider, M.: Critical Shields values in coarse-bedded steep streams, Water Res. Res., 49, 7427–7447, 2013. 
Brooke, S. A. S., Whittaker, A. C., Armitage, J. J., D'Arcy, M., and Watkins, S.: Quantifying Sediment Transport Dynamics on Alluvial Fans From Spatial and Temporal Changes in Grain Size, Death Valley, California, J. Geophys. Res.-Earth, 123, 2019–2067,, 2018. 
Buffington, J., Dietrich, W. E., and Kirchner, J. W.: Friction angle measurements on a naturally formed gravel streambed: Implications for critical boundary shear stress, Water Res. Res., 28, 411–425, 1992. 
Short summary
We calculated the probability of sediment transport in coarse-grained mountainous streams in the Alps and the Andes where data on water discharge is available. We find a positive correlation between the predicted probability of sediment transport and the grain size sorting of the bed material. We suggest that besides sediment discharge, the bedload sorting exerts a significant influence on the mobility of sediment and thus on the stability of gravel bars in mountainous streams.