CE 704 · Chapter 4
Hydropower Engineering past question
4.4.2 Methods of dissipating energy below a dam, stilling basin, ski-jump and flip buckets, their suitability, hydraulics of stilling basin, the role of tail-water in energy dissipation
The discharge of water over a spillway 12m wide is 300m³/s into stilling basin of the same width. The lake level behind the spillway has an elevation of 50m and river water surface elevation downstream of stilling basin is 25m. Assume a 10% energy loss in flow down the spillway, find invert level elevation of the flow of the stilling basin so that hydraulic jump forms in the basin. Select an appropriate USBR stilling basin so that hydraulic jump forms in the basin so that hydraulic jump forms in the basin. Select an appropriate USBR stilling basin so that hydraulic jump forms in the basin and list all the dimensions. [10]