Hydraulic Studies on Drainage Gate (Flap Gate) (I)

Two dimensional efflux from flap gate

Abstract

Flap gate is most widely used for the purpose of water control in reclamation land. In this study, its discharge characteristics were analyzed in two-dimensional efflux. First, the efflux from a gate was divided into submerged and free-jet effluxes, and the discharge coefficient was determined experimentally for flap gates with different values of unit weight. Next, the relation between the inclination of flap gate and head water and tail water depths was obtained.