2016 Volume 22 Pages 157-162
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 = (K3/2・(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.
