Research on Energy Dissipation and Applying Value of Stepped Spillwayi

This paper summarizes the calculation formula of energy dissipation of a stepped spillway,the influence factor of energy dissipation and the applied range of the stepped spillway.The paper compares the stepped spillway with the smooth surface spillway in both effect of energy dissipation and length of the stilling basin for a specific reservoir,and then analyzes the respective features of the two spillways.The result shows that the energy 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 reducing the cost.