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A comparative study of open channel and subaqueous gravity flows passing a slope break.

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Title: A comparative study of open channel and subaqueous gravity flows passing a slope break.
Authors: Tao, Liyun1,2 (AUTHOR), Huang, Heqing1,3 (AUTHOR) heqingh@sina.com, Yin, Guoxia3 (AUTHOR), Wu, Yakun3 (AUTHOR)
Source: Journal of Hydraulic Research / Journal de Recherches Hydraulique. Dec2025, Vol. 63 Issue 6, p713-722. 10p.
Subjects: Open-channel flow, Turbidity currents, Slopes (Soil mechanics), Stratified flow, Computer simulation, Chemistry experiments, Hydraulic jump
Abstract: Subaqueous gravity flows – turbidity currents and industrial or agricultural discharges – often encounter abrupt slope changes shortly after entering rivers, lakes or oceans. It has long been assumed that such flows become fully mixed through submerged hydraulic jumps, in the same way as open-channel flows. Here we combine laboratory experiments with high-resolution numerical simulations to compare open-channel flow with two types of subaqueous gravity flow – saline density currents and dilute depositional turbidity currents – at identical inflow rates across a slope break. The results reveal marked contrasts: hydraulic jumps in subaqueous gravity flows are far weaker, and the near-bed density stratification remains across the slope transition. These findings advance our understanding of how dilute turbidity currents deposit stratified layers over breaks in slope and offer guidance for mitigating pollution caused by submerged gravity-driven discharges. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Hydraulic Research / Journal de Recherches Hydraulique is the property of Taylor & Francis Ltd 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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Header DbId: egs
DbLabel: Engineering Source
An: 190436431
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: A comparative study of open channel and subaqueous gravity flows passing a slope break.
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  Data: <searchLink fieldCode="AR" term="%22Tao%2C+Liyun%22">Tao, Liyun</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Heqing%22">Huang, Heqing</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> heqingh@sina.com</i><br /><searchLink fieldCode="AR" term="%22Yin%2C+Guoxia%22">Yin, Guoxia</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Yakun%22">Wu, Yakun</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Hydraulic+Research+%2F+Journal+de+Recherches+Hydraulique%22">Journal of Hydraulic Research / Journal de Recherches Hydraulique</searchLink>. Dec2025, Vol. 63 Issue 6, p713-722. 10p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Open-channel+flow%22">Open-channel flow</searchLink><br /><searchLink fieldCode="DE" term="%22Turbidity+currents%22">Turbidity currents</searchLink><br /><searchLink fieldCode="DE" term="%22Slopes+%28Soil+mechanics%29%22">Slopes (Soil mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Stratified+flow%22">Stratified flow</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Chemistry+experiments%22">Chemistry experiments</searchLink><br /><searchLink fieldCode="DE" term="%22Hydraulic+jump%22">Hydraulic jump</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Subaqueous gravity flows – turbidity currents and industrial or agricultural discharges – often encounter abrupt slope changes shortly after entering rivers, lakes or oceans. It has long been assumed that such flows become fully mixed through submerged hydraulic jumps, in the same way as open-channel flows. Here we combine laboratory experiments with high-resolution numerical simulations to compare open-channel flow with two types of subaqueous gravity flow – saline density currents and dilute depositional turbidity currents – at identical inflow rates across a slope break. The results reveal marked contrasts: hydraulic jumps in subaqueous gravity flows are far weaker, and the near-bed density stratification remains across the slope transition. These findings advance our understanding of how dilute turbidity currents deposit stratified layers over breaks in slope and offer guidance for mitigating pollution caused by submerged gravity-driven discharges. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Hydraulic Research / Journal de Recherches Hydraulique is the property of Taylor & Francis Ltd 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.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=190436431
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1080/00221686.2025.2589144
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 10
        StartPage: 713
    Subjects:
      – SubjectFull: Open-channel flow
        Type: general
      – SubjectFull: Turbidity currents
        Type: general
      – SubjectFull: Slopes (Soil mechanics)
        Type: general
      – SubjectFull: Stratified flow
        Type: general
      – SubjectFull: Computer simulation
        Type: general
      – SubjectFull: Chemistry experiments
        Type: general
      – SubjectFull: Hydraulic jump
        Type: general
    Titles:
      – TitleFull: A comparative study of open channel and subaqueous gravity flows passing a slope break.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Tao, Liyun
      – PersonEntity:
          Name:
            NameFull: Huang, Heqing
      – PersonEntity:
          Name:
            NameFull: Yin, Guoxia
      – PersonEntity:
          Name:
            NameFull: Wu, Yakun
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 12
              Text: Dec2025
              Type: published
              Y: 2025
          Identifiers:
            – Type: issn-print
              Value: 00221686
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            – Type: volume
              Value: 63
            – Type: issue
              Value: 6
          Titles:
            – TitleFull: Journal of Hydraulic Research / Journal de Recherches Hydraulique
              Type: main
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