An ogee spillway is a type of overflow spillway that consists of a curved, smooth, and continuous surface, typically with a crest shape that follows an ogee curve. The ogee curve is a mathematical curve that provides a smooth, flowing shape, allowing water to flow freely over the spillway crest without separation or cavitation. The design of an ogee spillway involves determining the crest shape, spillway width, and other geometric parameters to ensure safe and efficient operation.