Effect of slope on energy dissipation for flow over a stepped spillway

Abstract In a stepped spillway, the spillway face is provided with series of steps from near crest to toe. This type attractive for water resource management because it dissipates energy that within flow. When dissipated by steps, reduces reduction otherwise must occur at toe spillway. present study, nine physical models slopes 15, 25, 45° and number varying 5 50 have been constructed. The spillways standard Ogee profiles constant slope extends Two different-sized flumes were used in experiments (25 cm wide). Several constructed order measure dissipation. purpose this research investigate dissipation rate different slopes. It was found two most important dimensionless factors influencing are Froude q2/(gHdam3). step less impact on However, discharge over increasing slope, will increase Using multiple regressions, some useful relations determination dissipating obtained.