2003 Volume 9 Pages 49-54
The behavior of reeds on floodchannel during floods is closely related to discharge capacity in rivers. However, the relation between reed deformation and roughness coefficient on floodplain during floods is not known well. In addition, the method to evaluate discharge capacity in rivers with reeds has not been established. The case of the Rokkaku River is an example of floodchannel covered by reeds, so they affect the flow during floods. An investigation on the behavior of reeds and flow was carried out in a straight channel constructed on the floodplain of the Rokkaku River. In this paper, the relation between behavior of reeds and roughness coefficient is described based on the data of the field experiment, and methods to evaluate the extent of reed falling and deformation and river discharge capacity are presented.
