Investigating Energy Dissipation for Different Inclined Spillways and ‎Baffles Blocks

Abstract

The stepped spillway is an important structure for energy dissipation downstream of dams. This study is based on laboratory work, aiming to increase the energy dissipation percentage for uniform and non-uniform stepped spillways. The study is based on twelve models of water-resistant wood, six models uniform and six models non-uniform, with different slopes and numbers of steps where angles were used (30°,40°,45°) and number stepped (10, 5) steps. The total number of trials is 126 trials. The laboratory results showed that the non-uniform model is more efficient in energy dissipation and approximating the hydraulic jump. After that placing baffles blocks in stepped spillways with ten steps and 45° because it records the lowest dissipation energy. The results indicate that the best model for energy dissipation is the seventh model with an angle of inclination (30°) and the number of steps 5.