INVESTIGATION OF SPECIFIC FLOW ENERGY WITHIN SHARP-CRESTED WEIR

The article presents theoretical and experimental investigations of the flow specific energy within sharp-crested weir. The height of the overflow wall св and head H are estimated as main operating factors that determine hydraulic weir outbound parameters: threshold depth h and the specific weir flow q. It is pointed that reshuffle of the flow from the steady flow to the nappe comes along the weir and cases head loss. Hinds formula application adequacy is proved to evaluate this loss. An energy equation for sharp-crested weir is determined. Graphs set out in the article disclose the influence of the main operating factors and their ratio on the fractional head loss.