Abstract
Rivers in Japan produce a lot of flow-out sand. This results in an accumulation of inflow sand at dams and a decrease in capacity of water reservoir function of dams. This also causes the decrease of level of riverbed at the lower reaches and increase of seashore erosion. Nevertheless, present sediment controls at dams are carried separately. In this paper, we discussed the present circumstances of sediment control at dams and propose a new comprehensive sediment control of dams including reservoir sediment control.
