Discharge Efficiency of Reservoir-Application-Specific Labyrinth Weirs

Abstract

Published labyrinth weir design methods, which have primarily been developed on the basis of labyrinth weir test data from laboratory flumes, are specific to in-channel labyrinth weir applications in which the approach flow is oriented normal to the weir axis. Consequently, some uncertainty exists regarding the hydraulic performance of labyrinth weir configurations that are specific to reservoir applications (i.e., projecting, flush, rounded inlet, and arced labyrinth weirs). The discharge efficiency, as characterized by the weir discharge coefficient, of laboratory-scale projecting, flush, rounded inlet, and arced labyrinth weirs with 12 degree sidewall angles, were evaluated as a function of