Articles | Volume 9, issue 6
Research article
04 Nov 2021
Research article |  | 04 Nov 2021

Triggering and propagation of exogenous sediment pulses in mountain channels: insights from flume experiments with seismic monitoring

Marco Piantini, Florent Gimbert, Hervé Bellot, and Alain Recking

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Cited articles

Allstadt, K. E., Farin, M., Iverson, R. M., Obryk, M. K., Kean, J. W., Tsai, V. C., Rapstine, T. D., and Logan, M.: Measuring Basal Force Fluctuations of Debris Flows Using Seismic Recordings and Empirical Green's Functions, J. Geophys. Res.-Earth Surf., 125, 9,, 2020. 
Arattano, M. and Moia, F.: Monitoring the propagation of a debris flow along a torrent, Hydrolog. Sci. J., 44, 811–823,, 1999. 
Arran, M. I., Mangeney, A., De Rosny, J., Farin, M., Toussaint, R., and Roche, O.: Laboratory Landquakes: Insights From Experiments Into the High-Frequency Seismic Signal Generated by Geophysical Granular Flows, J. Geophys. Res.-Earth Surf., 126, 5,, 2021. 
Asano, Y. and Uchida, T.: Detailed documentation of dynamic changes in flow depth and surface velocity during a large flood in a steep mountain stream, J. Hydrol., 541, 127–135,, 2016. 
Bacchi, V., Recking, A., Eckert, N., Frey, P., Piton, G., and Naaim, M.: The effects of kinetic sorting on sediment mobility on steep slopes, Earth Surf. Process. Landforms, 39, 1075–1086,, 2014. 
Short summary
We carry out laboratory experiments to investigate the formation and propagation dynamics of exogenous sediment pulses in mountain rivers. We show that the ability of a self-formed deposit to destabilize and generate sediment pulses depends on the sand content of the mixture, while each pulse turns out to be formed by a front, a body, and a tail. Seismic measurements reveal a complex and non-unique dependency between seismic power and sediment pulse transport characteristics.