Earth Surface Dynamics
Earth Surface Dynamics
ESurf
Articles | Volume 13, issue 2
Articles | Volume 13, issue 2
https://doi.org/10.5194/esurf-13-277-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-13-277-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 13, issue 2
Research article
 | 
31 Mar 2025
Research article |  | 31 Mar 2025

Hillslope diffusion and channel steepness in landscape evolution models

David G. Litwin, Luca C. Malatesta, and Leonard S. Sklar

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Short summary
Channel–hillslope coupling in landscape evolution models can strongly affect channel profiles. When hillslope diffusion is applied everywhere and only topography is tracked, a new scaling predicts how detachment-limited channels steepen with hillslope diffusion. Field data support channel steepening to transport sediment but not as predicted by the scaling, highlighting the need for a critical inspection of channel–hillslope coupling approaches.
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