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Effect of Step Geometry on Local Scour Downstream of Stepped Chutes.

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Title: Effect of Step Geometry on Local Scour Downstream of Stepped Chutes.
Authors: Tuna, M.1 mctuna@firat.edu.tr, Emiroglu, M.1
Source: Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ). Mar2013, Vol. 38 Issue 3, p579-588. 10p.
Subjects: Spillways, Chutes, Geometry, Energy dissipation, Flood control, Scour (Hydraulic engineering)
Abstract (English): A chute is characterized by a steep bed slope associated with torrential flow. The chute flow may be either smooth or stepped. Stepped spillways (or chutes) have become a popular method for handling flood releases. Scour hole formed downstream of a chute may affect the safety and stability of the hydraulic structure. In this study, the effect of step geometry on the dynamics of local scour processes is analyzed in the context of the scour that takes place downstream from a stepped chute. Three different step heights have been used to study the scour process for various chute angles, stilling basin sill heights, tailwater depths and flow rate conditions. A total of 216 laboratory tests have been conducted and the findings have been analyzed to determine the influence of step geometry on the scouring at the downstream of the stepped chute. The results show that the equilibrium depth of scour is highly dependent on the step geometry. In addition, the equilibrium depth of scour decreases while the step height increases. Also, the equilibrium depth of scour also increases with an increase in the discharge and the chute angle. [ABSTRACT FROM AUTHOR]
Abstract (Arabic): [MediaObject not available: see fulltext.] [ABSTRACT FROM AUTHOR]
Copyright of Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Data: Effect of Step Geometry on Local Scour Downstream of Stepped Chutes.
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  Data: <searchLink fieldCode="DE" term="%22Spillways%22">Spillways</searchLink><br /><searchLink fieldCode="DE" term="%22Chutes%22">Chutes</searchLink><br /><searchLink fieldCode="DE" term="%22Geometry%22">Geometry</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+dissipation%22">Energy dissipation</searchLink><br /><searchLink fieldCode="DE" term="%22Flood+control%22">Flood control</searchLink><br /><searchLink fieldCode="DE" term="%22Scour+%28Hydraulic+engineering%29%22">Scour (Hydraulic engineering)</searchLink>
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  Label: Abstract (English)
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  Data: A chute is characterized by a steep bed slope associated with torrential flow. The chute flow may be either smooth or stepped. Stepped spillways (or chutes) have become a popular method for handling flood releases. Scour hole formed downstream of a chute may affect the safety and stability of the hydraulic structure. In this study, the effect of step geometry on the dynamics of local scour processes is analyzed in the context of the scour that takes place downstream from a stepped chute. Three different step heights have been used to study the scour process for various chute angles, stilling basin sill heights, tailwater depths and flow rate conditions. A total of 216 laboratory tests have been conducted and the findings have been analyzed to determine the influence of step geometry on the scouring at the downstream of the stepped chute. The results show that the equilibrium depth of scour is highly dependent on the step geometry. In addition, the equilibrium depth of scour decreases while the step height increases. Also, the equilibrium depth of scour also increases with an increase in the discharge and the chute angle. [ABSTRACT FROM AUTHOR]
– Name: Abstract
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  Group: Ab
  Data: [MediaObject not available: see fulltext.] [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s13369-012-0335-x
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        Text: English
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        Type: general
      – SubjectFull: Chutes
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      – SubjectFull: Geometry
        Type: general
      – SubjectFull: Energy dissipation
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      – SubjectFull: Flood control
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      – SubjectFull: Scour (Hydraulic engineering)
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      – TitleFull: Effect of Step Geometry on Local Scour Downstream of Stepped Chutes.
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              Text: Mar2013
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