Earth Surface Dynamics
Earth Surface Dynamics
ESurf
Articles | Volume 10, issue 6
Articles | Volume 10, issue 6
https://doi.org/10.5194/esurf-10-1097-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-10-1097-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 10, issue 6
Research article
 | 
09 Nov 2022
Research article |  | 09 Nov 2022

Episodic sediment supply to alluvial fans: implications for fan incision and morphometry

Anya S. Leenman and Brett C. Eaton

Supplement

https://doi.org/10.5194/esurf-10-1097-2022-supplement

Data sets

Episodic sediment supply to alluvial fans: implications for fan incision and morphometry: experimental dataset Leenman, A. and Eaton, B https://doi.org/10.5281/zenodo.7100814

Model code and software

Figure generation code A. Leenman https://github.com/a-leenman/Leenman_Eaton_2022/releases/tag/v1.2

Data processing code A. Leenman https://github.com/a-leenman/phd_code/releases/tag/v1.0

Video supplement

Alluvial fan experiment with widely graded sediment mixture, ft. clock (repeat 2) A. Leenman https://youtu.be/ML2LV28MQEM

Alluvial fan experiment with short feed oscillations A. Leenman https://youtu.be/jXjWIkLU-7A

Alluvial fan experiment with medium-length feed oscillations A. Leenman https://youtu.be/T4JbZC9YkXQ

Alluvial fan experiment with long feed oscillations A. Leenman https://youtu.be/EcCWYGIbsqA

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Short summary
The supply of sediment (sand and gravel) carried by a stream out of a steep mountain valley is widely thought to control the gradient of the fan-shaped landforms that streams often build where they leave their valley. We tested this idea in a set of sandbox experiments with oscillating high and low sediment supply. Even though the average sediment supply never changed, longer oscillations built flatter fans, indicating how wetter climates might affect these mountain landforms.
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