EXPERIMENTAL INVESTIGATION OF FLOW AND ENERGY DISSIPATION IN STEPPED SPILLWAYS

Abstract

The experimental results presented have permitted to describe flow
configurations on the stepped spillway. The same results indicate that:
i. stepped spillway dissipates the flow energy better than those of smooth
profile.
ii. The energy dissipation is inversely proportional to the flow discharge
which is equal to 30 l/s.m for our case.
iii. For the exploration data of our experiment, the nappe flow dissipates
better than that of skimming regime.
iv. Also, our results indicate that the energy dissipation, in the case of a
nappe flow, depends on the number of spillway steps and on the
discharge.
v. In the case of skimming flow, the energy dissipation depends on the
spillway slope and the discharge.
vi. The friction factor has a strong influence on the energy dissipation whose
mean value is 0.24.