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

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Cited articles

Agisoft PhotoScan Professional: Structure-from-Motion photogrammetry software, (last access: 3 November 2022), 2018. a
Al-Farraj, A. and Harvey, A. M.: Morphometry and depositional style of Late Pleistocene alluvial fans: Wadi Al-Bih, northern UAE and Oman, Geol. Soc. Lond. Spec. Publ., 251, 85–94, 2005. a, b, c
Ashworth, P. J., Best, J. L., Leddy, O., and Geehan, G. W.: The physical modelling of braided rivers and deposition of fine-grained sediment, in: Process Models and Theoretical Geomorphology, edited by: Kirkby, M. J., John Wiley & Sons Ltd, 115–139, ISBN 0471941042, ISBN 9780471941040, 1994. a
Ashworth, P. J., Best, J. L., and Jones, M.: Relationship between sediment supply and avulsion frequency in braided rivers, Geology, 32, 21–24, 2004. a, b, c
Beaumont, P.: Alluvial fans along the foothills of the Elburz Mountains, Iran, Palaeogeogr. Palaeocl., 12, 251–273,, 1972. a
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.