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Hydraulic design aspects of rock-weir fishways with notch for habitat connectivity.

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Title: Hydraulic design aspects of rock-weir fishways with notch for habitat connectivity.
Authors: Baki, Abul Basar M.1 baki@ualberta.ca, Zhu, David Z.2, Harwood, Andrew3, Lewis, Adam3, Healey, Katie3
Source: Journal of Ecohydraulics. Apr2020, Vol. 5 Issue 1, p94-109. 16p.
Subjects: Hydraulics, Fishways, Energy dissipation, Flow velocity, Swimming
Abstract: Nature-like fishways have been installed at many migration barriers in recent years to mitigate the effects of human development and habitat fragmentation on fish. The design of these fishways determines the flow characteristics and ultimately the success of these passage facilities. This study numerically investigates the hydraulic properties associated with small passage openings (notch) that are provided in rock-weir-type fishways. Two distinct flow regimes, weir and transitional, were identified. The rock-weir with notch ensured suitable hydraulics for fish migration and sufficient fish resting areas in weir pools. A dimensionless weir coefficient was introduced to existing depth–discharge relationships to compute the weir flow more accurately. A reduction factor for the maximum velocity was also proposed as a function of discharge. This study optimized the design of rock-weir fishways considering passage notches based on fish resting zones, volumetric dissipated power, and performance for upstream fish migration. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Ecohydraulics 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: 143739642
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Hydraulic design aspects of rock-weir fishways with notch for habitat connectivity.
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  Data: <searchLink fieldCode="AR" term="%22Baki%2C+Abul+Basar+M%2E%22">Baki, Abul Basar M.</searchLink><relatesTo>1</relatesTo><i> baki@ualberta.ca</i><br /><searchLink fieldCode="AR" term="%22Zhu%2C+David+Z%2E%22">Zhu, David Z.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Harwood%2C+Andrew%22">Harwood, Andrew</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Lewis%2C+Adam%22">Lewis, Adam</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Healey%2C+Katie%22">Healey, Katie</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="DE" term="%22Hydraulics%22">Hydraulics</searchLink><br /><searchLink fieldCode="DE" term="%22Fishways%22">Fishways</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+dissipation%22">Energy dissipation</searchLink><br /><searchLink fieldCode="DE" term="%22Flow+velocity%22">Flow velocity</searchLink><br /><searchLink fieldCode="DE" term="%22Swimming%22">Swimming</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Nature-like fishways have been installed at many migration barriers in recent years to mitigate the effects of human development and habitat fragmentation on fish. The design of these fishways determines the flow characteristics and ultimately the success of these passage facilities. This study numerically investigates the hydraulic properties associated with small passage openings (notch) that are provided in rock-weir-type fishways. Two distinct flow regimes, weir and transitional, were identified. The rock-weir with notch ensured suitable hydraulics for fish migration and sufficient fish resting areas in weir pools. A dimensionless weir coefficient was introduced to existing depth–discharge relationships to compute the weir flow more accurately. A reduction factor for the maximum velocity was also proposed as a function of discharge. This study optimized the design of rock-weir fishways considering passage notches based on fish resting zones, volumetric dissipated power, and performance for upstream fish migration. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Ecohydraulics 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.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1080/24705357.2019.1652706
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 16
        StartPage: 94
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      – SubjectFull: Hydraulics
        Type: general
      – SubjectFull: Fishways
        Type: general
      – SubjectFull: Energy dissipation
        Type: general
      – SubjectFull: Flow velocity
        Type: general
      – SubjectFull: Swimming
        Type: general
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      – TitleFull: Hydraulic design aspects of rock-weir fishways with notch for habitat connectivity.
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            NameFull: Harwood, Andrew
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            NameFull: Lewis, Adam
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            NameFull: Healey, Katie
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            – D: 01
              M: 04
              Text: Apr2020
              Type: published
              Y: 2020
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