Typical Spillway Structure for Central and Southern Florida Water-Control Project

摘要

A typical control structure, a low ogee spillway with vertical-life gates, was studied on a 1:16-scale model to determine the effects on discharge characteristics of various approach and exit channel elevations under free and submerged, uncontrolled and controlled flows. Results indicated that the discharge characteristics for each type of flow can be satisfied by certain equations. The approach depth does not affect submerged-flow discharge coefficients, and approach depths greater than the design head do not appreciably affect free-flow coefficients. However, approach depths less than the design head do affect free-flow coefficients. Exit channel elevations affect uncontrolled flow more than controlled (almost no effect), and free more than submerged. There is a critical exit channel elevation at which the structure's efficiency in passing uncontrolled flows is greatly reduced. The test data do not permit a complete solution of the problem, but do afford a firmer basis for design. Additional model and field data are needed for a complete solution. (Author)