樹木群スケール，河道スケールと樹木群透過係数の関係

抄録

Vegetation management in the river is an important role not only flood control but also river environment. The authors’ have estimated hydraulic effects of vegetation on flood flows by using vegetation permeability coefficient. The vegetation permeability coefficient is closely related to vegetation conditions, for example scale and location. But further research of vegetation permeability coefficient is required for vegetations in different scales of rivers. The objective of this paper is to clarify dimensionless relationship between vegetation permeability coefficient and scales of channel and vegetation.

We showed that dimensionless vegetation permeability coefficient was small in relatively narrow channels. And that dimensionless vegetation permeability coefficient took small values when vegetation covers large width of the river cross-section.