遠賀川水系への安定砂礫床河道の横断形状と無次元掃流力に関する関係式の適用

抄録

This study is concerned with the non-dimensional relationships for the bank-full channel characteristics as well as dimensionless tractive force τ_*S for stable channels of gravel and sand bed alluvial rivers. The condition proposed by the author for stable channels, that satisfies rational regime relations, is verified with use of selected existing data of natural Japanese and overseas rivers, so that such relationship as τ_*S = (K^3/2・(B/h))² is identified and the value of K is estimated from these data. Then, the obtained relationships with the estimated K-value from selected existing data of Japanese and overseas natural rivers are tested against the Onga River in Kyushu. The relationships are found to well predict longitudinal changes of both channel characteristics and τ_*S of the Onga River.