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Report No.

Quantifying incision rates using landforms and deposits of incised meandering rivers; A Case study in the middle reach of Oi River, Akaishi Range, Japan

Tsukahara, Yuzuko ; Ogata, Manabu ; Kawamura, Makoto; Kanno, Mizuho*; Nishiyama, Nariaki ; Sueoka, Shigeru   ; Nakanishi, Toshimichi*; Komatsu, Tetsuya  

One hundred thousand-year-scale uplift rate of the Japanese mountains is estimated mainly based on the Terrace to Terrace method (TT method; Yoshiyama and Yanagida, 1995). To apply the TT method, it is necessary to identify the pair of the sedimentary terraces of the last glacial period and the one before last glacial period. However, there are many mountains where such terrace pairs are not recognized. Therefore, as an alternative method to the TT method, we suggest the method based on landforms and deposits of incised meandering rivers (for example, Yasue et al., 2014; Ogata et al., 2021). In this presentation, we will report the results of a survey conducted in the middle of the Oi River as part of such research.



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