Denik Sri Krisnayanti, Suhardjono, Very Dermawan, Mohammad Sholichin
The stepped spillway has increasingly become effective energy dissipation. The stepped spillway has been accepted to be the most powerful hydraulic structure to dissipate large flow energy downstream from spillway crest. The steps act as roughness elements significantly increase the dissipation energy rate. The physical study has performed on flat and pooled stepped spillways with a slope spillway (θ = 45˚) and number of steps (N): 20 and 40. The experiments were conducted for ten Froude number (Fr) run ranging from 1.117 to 9.909 with 0.700<yc/h<3.00. The focus of research to investigate the relationship between relative energy losses in skimming flow performance against Froude number on various stepped. The effect of number of steps is evident when the relative energy loss increases with the number of steps. In addition, the relative energy loss of flow on pooled steps is dissipating more energy than flat steps. © 2016 Penerbit UTM Press. All rights reserved.
Department of Civil Engineering, Faculty of Engineering, Brawijaya University, Malang, 65145, Indonesia; Department of Water Resources, Faculty of Engineering, Brawijaya University, Malang, 65145, East Java, Indonesia
