Earth Surface Dynamics
Earth Surface Dynamics
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Articles | Volume 13, issue 5
Articles | Volume 13, issue 5
https://doi.org/10.5194/esurf-13-959-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-13-959-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 13, issue 5
Research article
 | 
25 Sep 2025
Research article |  | 25 Sep 2025

Shape evolution of bulk sediment in headwater streams: effects of rock type and particle size

Naoya O. Takahashi, Daisuke Ishimura, Keitaro Yamada, Ryoga J. Ohta, Yuki Arai, and Yuki Yamane

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Short summary
Changes in sediment mass is accompanied by shape change. We studied downstream changes in particle shape near a channel head using image-based analysis. Although the particles tended to become smoother and more circular, such trend was significantly disrupted by the addition of rock fragment supplied from hillslopes or detached from larger particles during transport. Our findings indicated the dominant process that determine particle shape changes over short distance in headwater streams.
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