Stepped spillway design for energy dissipation

Abstract Important water structures known as stepped spillways are used to dissipate energy, aerate rivers, and reduce the cost of downstream pool. The aim this study is increase energy dissipation rate by proposing an alternative design flat spillways, which frequently in practice. For that reason, Circular Stepped Spillway (CSS) has been constructed numerically investigated paper. CSS spillway compared using three different models discharges. According simulation findings, performs better step radius gets smaller. with depths 0.50, 1.50, 2.50 cm have dissipated up 21.4, 38, 50.7% more than spillway, respectively.