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Hybrid analysis of river training structures: integration of 3D numerical modeling with field-scale hydrodynamic assessment.

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Title: Hybrid analysis of river training structures: integration of 3D numerical modeling with field-scale hydrodynamic assessment.
Authors: Roushangar, Kiyoumars1,2 (AUTHOR) kroshangar@yahoo.com, Aalami, Mohammad Taghi1 (AUTHOR) mtaalami@tabrizu.ac.ir, Akhoundzadeh, Ali3 (AUTHOR) ali.akhoundzadeh@tabrizu.ac.ir
Source: Environmental Earth Sciences. May2026, Vol. 85 Issue 11, p1-17. 17p.
Subject Terms: *Levees, *Three-dimensional flow, *Computer simulation, *Hydrodynamics, *Computational fluid dynamics, *River engineering, *Hydraulic models
Abstract: In this paper, the performance of groynes and levees as river training structures on the Aras River in Ashtabin village is examined using three numerical models: FLOW-3D, HEC-RAS 2D and CCHE2D. The study was based on a 3.5 km stretch whereby the flow velocities varied within the range of 0.2 to 2.5 m/s with a range of depths of 0.2 to 5 m. It was found that groynes raised the local flow velocities by 45% at the heads, but that levees raised the main channel velocity by 2535%. The measurements of turbulent kinetic energy demonstrated a higher turbulence of up to 80% increase in groynes than natural conditions and an increase of 30% in levees, which is moderate. Peak scour depths of groyne heads were 2.5-3 times groyne length, with levees having a less homogeneous, shallower scour, in the range of 1.5 times the depth of flow. The numerical modeling of the results revealed that FLOW-3D gave the best results that had less than 5% error in predicting the surface and bed shear stresses when compared with HEC-RAS 2D and the CCHE2D that had 15% and 25% errors, respectively. The experiment also found out that groynes formed powerful horseshoe vortices of relative intensities 0.4–0.6 of mean flow velocity in comparison to the weak secondary flows (0.2–0.3) around levees. The results are quantitative information useful in designing the best river training structure and the advantages of three-dimensional modeling in complex hydraulic modeling. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 194452077
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Hybrid analysis of river training structures: integration of 3D numerical modeling with field-scale hydrodynamic assessment.
– Name: Author
  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Roushangar%2C+Kiyoumars%22">Roushangar, Kiyoumars</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> kroshangar@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Aalami%2C+Mohammad+Taghi%22">Aalami, Mohammad Taghi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> mtaalami@tabrizu.ac.ir</i><br /><searchLink fieldCode="AR" term="%22Akhoundzadeh%2C+Ali%22">Akhoundzadeh, Ali</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> ali.akhoundzadeh@tabrizu.ac.ir</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Environmental+Earth+Sciences%22">Environmental Earth Sciences</searchLink>. May2026, Vol. 85 Issue 11, p1-17. 17p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Levees%22">Levees</searchLink><br />*<searchLink fieldCode="DE" term="%22Three-dimensional+flow%22">Three-dimensional flow</searchLink><br />*<searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br />*<searchLink fieldCode="DE" term="%22Hydrodynamics%22">Hydrodynamics</searchLink><br />*<searchLink fieldCode="DE" term="%22Computational+fluid+dynamics%22">Computational fluid dynamics</searchLink><br />*<searchLink fieldCode="DE" term="%22River+engineering%22">River engineering</searchLink><br />*<searchLink fieldCode="DE" term="%22Hydraulic+models%22">Hydraulic models</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In this paper, the performance of groynes and levees as river training structures on the Aras River in Ashtabin village is examined using three numerical models: FLOW-3D, HEC-RAS 2D and CCHE2D. The study was based on a 3.5 km stretch whereby the flow velocities varied within the range of 0.2 to 2.5 m/s with a range of depths of 0.2 to 5 m. It was found that groynes raised the local flow velocities by 45% at the heads, but that levees raised the main channel velocity by 2535%. The measurements of turbulent kinetic energy demonstrated a higher turbulence of up to 80% increase in groynes than natural conditions and an increase of 30% in levees, which is moderate. Peak scour depths of groyne heads were 2.5-3 times groyne length, with levees having a less homogeneous, shallower scour, in the range of 1.5 times the depth of flow. The numerical modeling of the results revealed that FLOW-3D gave the best results that had less than 5% error in predicting the surface and bed shear stresses when compared with HEC-RAS 2D and the CCHE2D that had 15% and 25% errors, respectively. The experiment also found out that groynes formed powerful horseshoe vortices of relative intensities 0.4–0.6 of mean flow velocity in comparison to the weak secondary flows (0.2–0.3) around levees. The results are quantitative information useful in designing the best river training structure and the advantages of three-dimensional modeling in complex hydraulic modeling. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=194452077
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1007/s12665-026-12943-z
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 17
        StartPage: 1
    Subjects:
      – SubjectFull: Levees
        Type: general
      – SubjectFull: Three-dimensional flow
        Type: general
      – SubjectFull: Computer simulation
        Type: general
      – SubjectFull: Hydrodynamics
        Type: general
      – SubjectFull: Computational fluid dynamics
        Type: general
      – SubjectFull: River engineering
        Type: general
      – SubjectFull: Hydraulic models
        Type: general
    Titles:
      – TitleFull: Hybrid analysis of river training structures: integration of 3D numerical modeling with field-scale hydrodynamic assessment.
        Type: main
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            NameFull: Roushangar, Kiyoumars
      – PersonEntity:
          Name:
            NameFull: Aalami, Mohammad Taghi
      – PersonEntity:
          Name:
            NameFull: Akhoundzadeh, Ali
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          Dates:
            – D: 25
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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              Value: 18666280
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              Value: 85
            – Type: issue
              Value: 11
          Titles:
            – TitleFull: Environmental Earth Sciences
              Type: main
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