EXPERIMENTAL INVESTIGATION OF DOUBLE SILL CONFIGURATION TO ENHANCE ENERGY DISSIPATION

Energy dissipation of water flow is an important factor in the planning of structures such as stilling basins.One of the standards set by the USBR (United States Bureau of Reclamation) that must be considered in the planning of the stilling basin is the Froude number (F1) at the toe of the spillway.Various forms of planning can be used to meet these standards, one of which is by using a double-sill downstream of the chute channel with a certain distance and height.However, as an alternative to planning, this study aims to evaluate the level of attenuation of flow energy in a stilling basin by using a double-sill.Because this sill is more effective in breaking down and reducing the strength of the water flow.Hydraulic physical model tests were carried out in the laboratory by placing double sills in a fixed position and varying the height of the sills.Because several previous studies have shown that the shape and size of sills affect the level of energy dissipation.It is expected that the results of the hydraulic model test can provide better information about the flow behavior in the overflow system in terms of energy dissipation.