Research on Energy Dissipation and Applying Value of Stepped Spillway

This paper summarizes calculation formula of energy dissipation of stepped spillway, influence factor of energy dissipation and the applied range of the stepped spillway. This paper compares the project of stepped spillway of a reservoir with the project of smooth surface spillway of the same reservoir with references to the effect of energy dissipation and the length of the stilling basin, and then respectively analyzes the feature of the two projects. The result shows that the dissipation of the stepped spillway mainly concentrates on the steps, and compared with the smooth surface spillway, the stepped spillway greatly shortens the length of the stilling basin, thus decreases the investment.