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

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

doi:https://doi.org/10.5194/esurf-9-1423-2021

Articles | Volume 9, issue 6

https://doi.org/10.5194/esurf-9-1423-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/esurf-9-1423-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

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

Supplement

https://doi.org/10.5194/esurf-9-1423-2021-supplement

Data sets

Dataset of "Triggering and propagation of exogeneous sediment pulses in mountain channels: insights from flume experiments with seismic monitoring" Marco Piantini, Florent Gimbert, Hervé Bellot, and Alain Recking https://doi.org/10.5281/zenodo.5552189

Video supplement

Storage area with bidomal mixture M. Piantini, F. Gimbert, H. Bellot, and A. Recking https://doi.org/10.5446/51666

Storage area with fine mixture M. Piantini, F. Gimbert, H. Bellot, and A. Recking https://doi.org/10.5446/51981

Storage area with coarse mixture M. Piantini, F. Gimbert, H. Bellot, and A. Recking https://doi.org/10.5446/51982

Storage area with bidomal mixture M. Piantini, F. Gimbert, H. Bellot, and A. Recking https://doi.org/10.5446/51984

Sediment flux during the supplementary experiment M. Piantini, F. Gimbert, H. Bellot, and A. Recking https://doi.org/10.5446/51985

Sediment pulse during the main experiment M. Piantini, F. Gimbert, H. Bellot, and A. Recking https://doi.org/10.5446/51986

Solid discharge peak during the main experiment M. Piantini, F. Gimbert, H. Bellot, and A. Recking https://doi.org/10.5446/51987

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.