Earth Surface Dynamics
Earth Surface Dynamics
ESurf
Articles | Volume 12, issue 6
Articles | Volume 12, issue 6
https://doi.org/10.5194/esurf-12-1329-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-12-1329-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 12, issue 6
Research article
 | 
03 Dec 2024
Research article |  | 03 Dec 2024

Knickpoints and fixed points: the evolution of fluvial morphology under the combined effect of fault uplift and dam obstruction on a soft bedrock river

Hung-En Chen, Yen-Yu Chiu, Chih-Yuan Cheng, and Su-Chin Chen

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Short summary
This study explores the fluvial morphology evolution in three rivers in Taiwan caused by natural tectonic movements (the 1999 Mw 7.6 Chi-Chi earthquake) and human-made structures (dams). Knickpoints resulting from riverbed uplift shift, leading to gradual evolution from instability to equilibrium. Dams, on the other hand, cause continuous degradation of the bed. When both effects exist on a reach, the impact of the knickpoint gradually fades away, but the effects of the dam on the river persist.
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