N. Roostrianawaty, V. Dermawan, E. Yuliani
Stepped spillways are hydraulic structures that effectively dissipate the energy of flowing water, particularly in open channels and dam spillways. One of the key parameters in evaluating energy dissipation performance is edge depth, the flow depth at the downstream end before the water enters free fall. This study aims to investigate the effect of the number of steps on edge depth and energy dissipation efficiency. Experimental tests were conducted on physical models of stepped channels with varying step numbers, analyzing flow behavior, depth profiles, and specific energy calculations. The results show that increasing the number of steps significantly reduces flow kinetic energy and stabilizes the edge depth. These findings provide valuable insights for designing safer and more efficient spillway structures. © 2026 Published under licence by IOP Publishing Ltd.
Water Resources Engineering Department, Faculty of Engineering, Universitas Brawijaya, Malang, Indonesia
