Abstract
Such a condition for stable channels of gravel and sand bed alluvial rivers as τ*s = (K3/2 · (B/h))2 has been proposed by the author, where τ*s=the dimensionless tractive force, B/h=width/depth ratio of stable river channels. The value of K is estimated with use of lots of selected existing data of natural Japanese and overseas rivers. Based on the proposed condition and hydraulic analysis, the cross-sectional geometry setting procedure having both discharge capacity and riverbed stability, that is applicable from single cross section to compound cross section, is developed, and tested against the Onga River in Kyushu.
