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Juvenile Salmon Passage.

File Language:
English


Details

  • Alternative Title:
    Hydrodynamic Regimes and Structures in Weir Baffled Culverts and Their Influence on Juvenile Salmon Passage
  • Creators:
    Thurman, D. R. ; Horner-Devine, A. R.
  • Corporate Creators:
    Washington State Transportation Center
  • Corporate Contributors:
    Washington (State). Department of Transportation ; United States. Federal Highway Administration
  • Subject/TRT Terms:
  • Publication/ Report Number:
    WA-RD 687.1
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Washington
  • Corporate Publisher:
    Washington (State). Department of Transportation
  • Abstract:
    The purpose of this study was to determine what hydraulic characteristics enhance or diminish ; upstream juvenile salmon passage within a sloped-weir baffled culvert. The culvert slope, baffle ; spacing, and baffle height were varied to observe flow regime trends that describe conditions suitable ; for fish passage. Biological testing was conducted in conjunction with the hydraulic micro-Acoustic ; Doppler Velocimeter (ADV) measurements. There was considerable spatial variability in the flow ; created by the sloped baffles within the culvert. The asymmetry of flow (As) decreased for increasing ; discharge, larger baffle spacing and smaller baffle heights. To describe the flow features essential to fish ; passage, the interrelation between flow asymmetry, depth, and velocity were presented in comparison ; with biological testing. For the range of parameters tested, flows were described by a series of three jet ; regimes which were a function of water depth over baffles. Comparing these regimes to the biological ; study revealed peak juvenile salmon passage was associated with a critical transition between jet ; regimes. Generalizing this transition for the entire data set using dimensionless scales provides ; professionals with guidance for retrofitting culverts.
  • Format:
    PDF
  • Funding:
    T9233, Task 9
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/27401/dot_27401_DS1.pdf
  • File Type:
    Filetype[PDF - 2.62 MB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha256:7a4d2a17c62a7cc66cf4738442fb7f6b05b138e81f5f939660638523b2727e74
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