抄録
Compound channel with a series of vertical drop spillways in low water channel is popular countermeasure for flood and sediment control works in Japan, especially in steep slope rivers. The main river flowing through the city of Sapporo, Toyohira River, has 8 low head dams in low water channel with a few hundred meters of interval. It is desired from engineering viewpoint to evaluate hydraulic functions, effect and existing problems in such compound channel rivers. In this paper, a numerical model to simulate flow and bed deformation in compound channel with a series of vertical drop spillways is depveloped. Calculated results are compared with the results obtained in moveable bed experiment.
