Research on the cross-sectional shape of rivers; Focusing on the Oi River, Abe River and 11 other rivers in Japan

Kawamura, Makoto*; Nishiyama, Nariaki  ; Jia, H.*; Ishikawa, Taiki*; Koizumi, Yukiko*; Nakanishi, Toshimichi*

The formation of the landforms includes the formation of mountains due to uplift caused by crustal movement, such as the Southern Alps, and the erosion of the land by rivers such as the Oi River and Abe River. To scientifically evaluate these interactions, elevation data was collected from cross sections of 13 rivers in Japan, set at equal intervals perpendicular to the flow direction from the river mouth to the upstream. In addition, by calculating the elevation difference of each river, with the center of the river being set at 0 m, we systematically organized the average elevation difference of each cross section and compared the average slope shape. As a result, a correlation was found between the average slope shape and the uplift rate.