Abstract

In this study, an experimental investigation of the scour hole dimensions downstream of the multi gates was made. For the model, four iron sluice gates with individual dimensions of 15 cm in width and 25 cm in height were created. where it was investigated how the Froude number affected the size of the scour hole by changing the number of open gates, gate opening, position of the open gate, and discharge. A laboratory channel with a length of 18 m, a width of 1 m, and a depth of 1 m was built by the supervisor using blocks and concrete for the tests. The primary gate that regulates the flow of water into the flume from the main reservoir is 7 meters away from where the laboratory model was built (Hassan, 2015). The many variables causing scour downstream of the gate were described by non-dimensional quantities that were obtained through the application of a dimensional analysis. The experimental test data that was acquired was examined and graphically displayed. Under free flow conditions, it was found that the Froude number significantly affected the scour hole dimension. When only one gate opened and the Froude number and discharge were both at their maximum values, the scour hole depth was at its greatest. The scour hole depth was measured at its lowest point when all open gates were open, the Froude number was at its lowest point, and the discharge was at its lowest point.