Articles | Volume 14, issue 3
https://doi.org/10.5194/esurf-14-417-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-14-417-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
02 Jun 2026
Research article |
| 02 Jun 2026
| 02 Jun 2026
Parameter estimation of river incision models of soft sedimentary rocks – a case study on the Kamikita Coastal Plain, northeast Japan
Nuclear Safety Research Center, Japan Atomic Energy Agency, Ibaraki, 319-1195, Japan
Tomoji Sanga
SNG Consultant, Saitama, 335-0013, Japan
Taro Shimada
Nuclear Safety Research Center, Japan Atomic Energy Agency, Ibaraki, 319-1195, Japan
Seiji Takeda
Nuclear Safety Research Center, Japan Atomic Energy Agency, Ibaraki, 319-1195, Japan
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Short summary
We estimated bedrock river incision parameters for soft sedimentary rock which were lacking in previous global compilations. In the Kamikita Coastal Plain, Japan, the slope exponent was greater than one (i.e., non-linearity of the incision process), which can be explained by past sea-level changes. The estimated erosion coefficient was almost agreed with the global relationship between unconfined compressive strength, supporting the significant influences of bedrock lithology on the coefficient.
We estimated bedrock river incision parameters for soft sedimentary rock which were lacking in...
