An Experimental Study of Folw Characteristics at the Downstream Depending on Gate Operation of a Sluice Gate

The weir is one of the hydraulic structure which is supposed to be used to store water quantity against drought. To solve the disturbance of flood control caused by soil sediment and environment problems from the severance of moving sediment, movable weir is currently set up so as to solve that serious problem. There have been many studies focusing on the weir in specific target area. however, it is not applicable for all kinds of moveable weir. Therefore, In this study, experiments for moveable weir typed sluice gate are performed and hydraulics characteristics are measured depending on gate operation. According to comparison results between apron length calculated by Bligh`s equation and hydraulic jump length by experiments, hydraulic jump length is bigger than apron length by Bligh`s equation where oscillation jump happens. Therefore, it is necessary to set the energy dissipator up for improving stability of hydraulic structure.