The present paper describes the experimental campaign carried on the physical model of the spillway of Lower Diamphwe Dam (Malawi), which is provided with a USBR type II stilling basin. Stilling basins are used in order to reduce the excessive kinetic energy of flowing water downstream of spillways. Specifically, a USBR type II basin is provided with blocks at the end of the chute and with a confining dentated sill; these appurtenances allow to dissipate excess energy with high efficiency. The study focuses on the hydraulic behavior of the stilling basin; tests were carried on for different values of incoming discharge and downstream water depth. Results show the dissipation efficiency of the stilling basin in terms of pressure fluctuation and the variability of the jump type with the hydraulic characteristics of the incoming and the downstream flow depths.
Experimental results on the physical model of an USBR type II stilling basin / Fecarotta, Oreste; Carravetta, Armando; DEL GIUDICE, Giuseppe; Padulano, Roberta; Brasca, A.; Pontillo, M.. - (2016). (Intervento presentato al convegno International Conference on Fluvial Hydraulics, RIVER FLOW 2016; Code 177969 tenutosi a St. Louis; United States nel 11 July 2016 through 14 July 2016).
Experimental results on the physical model of an USBR type II stilling basin
FECAROTTA, ORESTE;CARRAVETTA, ARMANDO;DEL GIUDICE, GIUSEPPE;PADULANO, ROBERTA;
2016
Abstract
The present paper describes the experimental campaign carried on the physical model of the spillway of Lower Diamphwe Dam (Malawi), which is provided with a USBR type II stilling basin. Stilling basins are used in order to reduce the excessive kinetic energy of flowing water downstream of spillways. Specifically, a USBR type II basin is provided with blocks at the end of the chute and with a confining dentated sill; these appurtenances allow to dissipate excess energy with high efficiency. The study focuses on the hydraulic behavior of the stilling basin; tests were carried on for different values of incoming discharge and downstream water depth. Results show the dissipation efficiency of the stilling basin in terms of pressure fluctuation and the variability of the jump type with the hydraulic characteristics of the incoming and the downstream flow depths.File | Dimensione | Formato | |
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