Juvenile Salmon Passage.

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:
  Culverts Fish Ladders Hydraulic Characteristics Hydrodynamics Salmon Salmon Passage Weirs
• 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
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:7a4d2a17c62a7cc66cf4738442fb7f6b05b138e81f5f939660638523b2727e74
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27401/dot_27401_DS1.pdf
• File Type:
  [PDF - 2.62 MB ]