EXPANDING STILLING BASIN

The Paper deals with abruptly expanding stilling basins. Based on a de scription of the main features of hydraulic jumps in expanding channel s, a design method for this type of energy dissipator is proposed. The how conditions in the basin are improved with a central baffle sill. An extensive experimental investigation was carried out in order to de fine the most adequate sill geometry and location. The proposed design method may be considered as an alternative to the USBR Basin III desi gn. From an economic point of view, the proposed dissipator provides b oth stilling action and expansion of the how. Owing to the presence of the baffle sill, the application of the described stilling basin is l imited to flow conditions in which incipient cavitation should not be expected.