Hydraulic Design of Stilling Basins: Stilling Basin with Sloping Apron (Basin V)

Bradley, Joseph N.; Peterka, A. J.

doi:10.1061/jyceaj.0000118

Cited by 23 publications

(6 citation statements)

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“…For a smooth bed, Eq. 9 with the above values of a, b and c yields systematic underestimates of Y values in comparison with both the 72 tests carried out here for a=12°, and the 45 tests of Bradley and Peterka (1957) for a=11.3° and 14°. To improve its reliability, Eq.…”

Section: Resultssupporting

confidence: 49%

“…6, the following empirical relationship: (9) where: a, b and c are three coefficients, is applicable. Using the 103 tests of Bradley and Peterka (1957), characterised by a=2.9°, 5.7°, 8.5°, 11.3°, 14°, 16.7°, and the 219 present tests for a=8.5°, 17.5° and 30°, Carollo et al (2011) obtained a=8.42, b=0.181 and c=0.663.…”

Section: Resultsmentioning

confidence: 99%

“…One of the first investigations concerning the B-jump on a smooth bed was carried out by Bradley and Peterka (1957) for angles a from 2.9° to 16.7° of the upstream sloping bed. Hager (1988) investigated Bjumps in a channel with a=45° and Kawagoshi and Hager (1990) extended the previous findings to a=30°.…”

Section: Introductionmentioning

confidence: 99%

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Sequent depth ratio of B-jumps on smooth and rough beds

Carollo

Ferro

Pampalone

2013

J Agricult Engineer

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A hydraulic B-jump has the toe section located on a positively sloping upstream channel and the roller end on a downstream horizontal channel. This paper analyses the B-jump on a rough bed, such as at the transition from a block ramp to the stilling basin. Laboratory measurements of the sequent depth were carried out using three different channel slopes for the rough bed and a single slope for the smooth bed. A solution useful for estimating the sequent depth ratio in a rectangular channel for different relative roughness and bed slope is proposed and positively tested by the present measurements. This solution can also be used to estimate the sequent depth ratio of classical hydraulic jumps or B-jumps on smooth and rough beds.

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Section: Resultssupporting

confidence: 49%

Section: Resultsmentioning

confidence: 99%

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Sequent depth ratio of B-jumps on smooth and rough beds

Carollo

Ferro

Pampalone

2013

J Agricult Engineer

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“…In a Report published in the 1950s, Bradley & Peterka (1955) established that the hydraulic jump could be classified in at least four different types, according to the inflow Froude number. The information contained in this and in other Reports was later used to assemble Monograph 25 (Peterka, 1984), first published in 1958.…”

Section: Introductionmentioning

confidence: 99%

Turbulent pressures at the position of maximum pressure fluctuation in hydraulic jump stilling basins

Júnior

Kipper

Ferreira

et al. 2023

RBRH

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Turbulent flow is responsible for a significant portion of damages and failures in dams. This paper sought to introduce novel approaches to the estimation of typical parameters used in the design of stilling basins. The standard deviations of pressure samples of 24 hydraulic jumps were analysed throughout the stilling basin longitudinal centreline, and the positions of maximum pressure fluctuation were identified. Next, mean and extreme pressures occurring at this position were calculated. Finally, these parameters were plotted against the inflow Froude number and curves were adjusted to the data. The position where maximum turbulence of undular, weak and oscillating jumps occurs varies according to the Froude number. Steady and strong jumps are more likely to induce negative pressures on the stilling basin. The findings of this paper broaden the knowledge on which regions of the stilling basin must receive special attention, and on how to minimize the chances of damages.

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“…In addition to the classic or free hydraulic jump studies, the effects of a roughened bed below the jump were mainly investigated for man‐made baffle devices (e.g., baffle blocks, baffle rows, end sills) (Bradley & Peterka, 1957a, 1957b, 1957c, 1957d, 1957e, 1957f; Rehbock, 1929), uniformly distributed engineered roughness (e.g., corrugated bed, rippled bed, rubber mats) (Ead & Rajaratnam, 2002; Felder & Chanson, 2018; Izadjoo & Shafai‐Bejestan, 2007), as well as uniformly distributed natural rigid roughness elements like sand and gravel (Afzal et al., 2011; Carollo et al., 2007, 2012). The literature generally indicated decreasing conjugate depth ratio and shortened jump length with increasing equivalent roughness height k s .…”

Section: Introductionmentioning

confidence: 99%

Hydraulic Jump on a Partially Vegetated Bed

Bai

Ning

Liu

et al. 2022

Water Resources Research

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Hydraulic jump is a common phenomenon in open-channel flows when the approach flow Froude number exceeds unity. The cause of hydraulic jump varies from sudden change in channel width, slope or bed elevation, to the presence of obstacles or bed roughness in the path of the supercritical flow, leading to a rapid rise in flow depth and transition to the subcritical flow regime (Hager, 1992;Henderson, 1966). Hydraulic jumps in natural waterways are usually featured by three-dimensional flow motions depending on the channel topography and movable boundaries (Valle & Pasternack, 2006a, 2006b. Vegetation growing on the channel bed represents a common flow barrier that introduces both form drag and friction resistance to the flowing water, inducing a hydraulic jump as the supercritical flow runs into the vegetation canopy and is forced to decelerate. The change in flow regime and the associated air entrainment can cause a number of hydraulic and environmental impacts from reduction in flood passage capacity to varied flow and fluid properties such as sediment carrying capacity, air-water mixture density, and dissolved oxygen content (

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Hydraulic Design of Stilling Basins: Stilling Basin with Sloping Apron (Basin V)

Cited by 23 publications

References 0 publications

Sequent depth ratio of B-jumps on smooth and rough beds

Sequent depth ratio of B-jumps on smooth and rough beds

Turbulent pressures at the position of maximum pressure fluctuation in hydraulic jump stilling basins

Hydraulic Jump on a Partially Vegetated Bed

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