Earth Surface Dynamics
Earth Surface Dynamics
ESurf
Articles | Volume 13, issue 3
Articles | Volume 13, issue 3
https://doi.org/10.5194/esurf-13-349-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-13-349-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 13, issue 3
Research article
 | 
14 May 2025
Research article |  | 14 May 2025

Influence of alluvial slope on avulsion in river deltas

Octria A. Prasojo, Trevor B. Hoey, Amanda Owen, and Richard D. Williams

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Latest update: 06 Oct 2025
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Short summary
Decades of delta avulsion (i.e. channel abrupt jump) studies have not resolved what the main controls of delta avulsion are. Using a computer model, integrated with field observation, analytical, and laboratory-made deltas, we found that the sediment load, which itself is controlled by the steepness of the river upstream of a delta, controls the timing of avulsion. We can now better understand the main cause of abrupt channel changes in deltas, a finding that aids flood risk management in river deltas.
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