In this study some results on local scour downstream of stilling basins for low-head structures are presented. A number of laboratory experiments were conducted in a 1 m wide and 20 m long rectangular straight channel in which an ogee-crest spillway followed by a stilling basin type USBR IV (without chute blocks) was positioned. Two nearly uniform bed sediments were tested. The runs were of long durations, typically 3 days, to achieve conditions of quasi-equilibrium scour hole. Based on the data collected, a new relationship was conjectured relating the quasi-equilibrium scour depth to the tail water densimetric Froude number.

Local scour downstream of stilling basins

OLIVETO, Giuseppe;B. ONORATI
2008-01-01

Abstract

In this study some results on local scour downstream of stilling basins for low-head structures are presented. A number of laboratory experiments were conducted in a 1 m wide and 20 m long rectangular straight channel in which an ogee-crest spillway followed by a stilling basin type USBR IV (without chute blocks) was positioned. Two nearly uniform bed sediments were tested. The runs were of long durations, typically 3 days, to achieve conditions of quasi-equilibrium scour hole. Based on the data collected, a new relationship was conjectured relating the quasi-equilibrium scour depth to the tail water densimetric Froude number.
2008
978-041545471-1
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11563/8523
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