流路の平面形状が砂州固定化および樹木繁茂に与える影響

抄録

In this study, we investigated the possibility of estimating the correlation between stabilization of bars and vegetation growth by the non-uniform strength caused by river-bed configuration. It’s suggested from long-term channel evolution of the Kamanashi River that the rectilinear trend of channel caused stabilization of bars and growth of vegetation. Then, we analyzed the relation between stabilization of bars and growth of vegetation by 2-dimensional bed evolution model from Showa period to now, for calculating bed variation, non-dimensional tractive force, B/H, non-equilibrium strength. Therefore, it found that non-uniform strength which closely relate to bed evolution is a more correlational index than non-dimensional tractive force to figure out the variation of stabilized bars and vegetation.