Experimental migration of knickpoints: influence of style of base-level fall  and bed lithology

Grimaud, J.-L.; Paola, C.; Voller, V.

doi:10.5194/esurf-4-11-2016

Articles | Volume 4, issue 1

https://doi.org/10.5194/esurf-4-11-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/esurf-4-11-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 4, issue 1

Research article

|

15 Jan 2016

Research article |

| 15 Jan 2016

Experimental migration of knickpoints: influence of style of base-level fall and bed lithology

J.-L. Grimaud, C. Paola, and V. Voller

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Oct 2024	13	13	0	26
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May 2025	33	10	1	44
Jun 2025	38	15	2	55
Jul 2025	28	19	1	48
Aug 2025	20	20	0	40
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Latest update: 15 Nov 2025

Short summary

Knickpoints represent localized steps along a river profile (e.g. waterfalls or rapids) that are commonly interpreted as the geomorphic response of river systems to external changes. We used a simple experiment to show that knickpoints may not only respond to external base-level change but are also able to self-organize. We highlight the effect of alluvial cover in delaying knickpoint formation and show that river bed strength controls both retreat velocity and geometry of knickpoints.