Experimental investigation of discharge capacity of Ogee side weirs

Side weirs are structures placed parallel to the main channel or at certain angles in order to discharge excess water through side channels to prevent floods in the channels, to direct a certain amount of water to another place, and to control the level and flow rate of water in the main channels. Ogee type weir structures are among the most important parts of the accumulation structures. Weir structures are necessary to ensure the safety of the structure in case of any possible flood and to transfer the flood waters in a controlled or uncontrolled manner. In this study, it is aimed to experimentally investigate the sluice capacity of Ogee type weirs used as spillways in order to ensure the safety of the accumulation structures when they are used as side weirs. In addition, a flow coefficient equation was obtained for the side weir with Ogee profile and the validity of the equation was examined by comparing the values calculated as a result of this equation with the measurement results. According to the obtained results, it was seen that Ogee type side weirs have a better sluice performance compared to sharp-crested weirs and the calculation of the sluice flows with the obtained weir coefficient gave quite reliable results.