河床形状と高水敷粗度が複断面蛇行流れの構造に及ぼす影響について

抄録

Structure of overbank flow in compound sinuous channel is discussed based on experimental results obtained by visualization methods. Secondary flow is most important in this flow. In this paper, the influences of bed form and roughness on the flow structure are investigated by using same conditions of channel and flow except for the bed and roughness. Scouring and deposition of bed are induced by the secondary flow and vice versa. Roughness on the flood plain reduces the surrounding velocity and this reduction causes the local modification of bed. From these results the interaction between secondary flow and bed configuration can be explained.