Results 181 to 190 of about 266 (220)
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Pressures on a stepped spillway
Journal of Hydraulic Research, 2007This paper presents an analysis of the pressure field on the steps of a stepped spillway on an RCC dam. The fundamental component of this study is a series of pressure measurements obtained in the fully-developed zone of skimming flow regime along a reduced-size stepped spillway model constructed at the Department of Hydraulic, Maritime and ...
M. S´nchez-Juny, E. Bladé, J. Dolz
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Hydraulics of stepped spillways with different numbers of steps
Dams and Reservoirs, 2010This paper describes the study of two physical models that were built to investigate the energy dissipation and flow regimes for different discharges over stepped spillways with different numbers of steps. These physical models had a general slope of 19·2% and had 12 and 23 steps respectively.
R. Roshan +5 more
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Journal of Hydraulic Engineering, 1994
This technical note presents a method to estimate the energy loss on stepped spillways for the jet‐flow regime, which occurs when the ratio of the critical depth yc to the height of the step h is less than approximately 0.8. It introduces the concept of α, the proportional energy loss per step, and using the extensive experimental results of Horner, α;
M. R. Chamani, N. Rajaratnam
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This technical note presents a method to estimate the energy loss on stepped spillways for the jet‐flow regime, which occurs when the ratio of the critical depth yc to the height of the step h is less than approximately 0.8. It introduces the concept of α, the proportional energy loss per step, and using the extensive experimental results of Horner, α;
M. R. Chamani, N. Rajaratnam
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Hydraulics of Stepped Spillways
2020This book provides a discussion of the latest research pertaining to the hydraulic design of spilways and to hydraulic engineering in general. It comprises the papers of a workshop organized to bring together engineers and scientists from around the world for the exchange of ideas on water flow over stepped spillways.
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Converging stepped spillway flow
Journal of Hydraulic Research, 2016ABSTRACTWall deflection in supercritical flow induces standing waves which significantly influence the flow field close to the wall. This paper analyses the flow in the converging stepped spillway, using two scale-models with different step heights and convergence angles. Results show that the height and the width of the standing wave increase with the
Zindović, Budo +3 more
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Air–Water Flows and Head Losses on Stepped Spillways with Inclined Steps
Journal of Irrigation and Drainage Engineering, 2022On a stepped spillway, the staircase invert profile generates some intense turbulent dissipation during the spill, associated with a significant reduction of kinetic energy, as well as strong self-aeration. The present study focused on the effects of inclined downward steps on the air–water flow properties, flow resistance, and head losses because ...
Yvan Arosquipa Nina +3 more
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Design of converging stepped spillways
2008Roller compacted concrete (RCC) stepped spillways are growing in popularity for providing overtopping protection for aging watershed dams with inadequate auxiliary spillway capacity and for the construction of new dams. Unobtainable land rights, topographic features, and land use changes caused by urbanization limit the ability to construct new dams or
Hunt, Sherry Lynn, Abt, Steven
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Bottom Aeration of Stepped Spillways
Journal of Hydraulic Engineering, 2006The upstream reach of stepped spillway flows may become prone to cavitation damage for large specific discharges because of the absence of air close to its bottom, until the point of bottom self-aeration is reached. This study considers the effect of two aerator types located at the first vertical step face to add air to the chute bottom.
Pfister, Michael +2 more
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Converging RCC Stepped Spillways
World Environmental and Water Resource Congress 2006, 2006The United States Department of Agriculture (USDA), Natural Resources Conservation Service (NRCS) estimates that nearly half of the small watershed dams constructed with their assistance will reach the end of their planned service life within the next 10 years.
S. L. Hunt, K. C. Kadavy, D. M. Temple
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Hydraulic design of stepped spillways
2002Roller Compacted Concrete (RCC) is becoming an increasingly popular method of constructing and protecting dam embankments. RCC naturally lends itself to a stepped configuration by the construction technique of roller compacting successive horizontal concrete lifts. To date, there have been numerous RCC stepped spillways constructed worldwide, yet there
Ward, Jason Paul +4 more
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