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Assessing Fish Passage at Culverts Metrics and Preliminary findings.

Assessing Fish Passage at Culverts Metrics and Preliminary findings. Presentation by Richard Thompson Ministry of Environment. Difference Between. 2. What are the most common issues resulting in changes in fishes ability to move up a stream channel?. Turbulence and increased velocity.

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Assessing Fish Passage at Culverts Metrics and Preliminary findings.

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  1. Assessing Fish Passage at Culverts Metrics and Preliminary findings. Presentation by Richard Thompson Ministry of Environment

  2. Difference Between 2

  3. What are the most common issues resulting in changes in fishes ability to move up a stream channel? Turbulence and increased velocity • No streambed substrate and low flow issues Perched culverts 3

  4. Maintain channel continuity through the crossing • Goal • Streambed diversity and material are similar to natural channel • Water Velocities and depths, cover and resting areas are similar to the natural channel • Outcome : Crossing is transparent to aquatic species 4

  5. How can we evaluate culverts for Fish Passage? Fish Passage Field Methods 5 Experiments/surveys observing actual fish passage success Velocity measurements Hydraulic analysis Measurement of surrogates indicative of hydraulic conditions

  6. This protocol is an example of the surrogate methodology Fish Passage Field Methods 6 • Surrogate key advantages: • Limited training • very efficient • any time of the year • Information can be used in other analysis

  7. Fish Passage Field Methods Five Key indicators that go into our Surrogate determination Embeddedness Outlet Drop Stream Width Ratio Culvert Slope Culvert Length

  8. Fish Passage What is embeddedness? Field Methods

  9. Fish Passage • What is outlet drop? Field Methods Culvert invert A B Outlet control Outlet drop = A + B 11

  10. I can’t reach

  11. Fish Passage Field Methods • What is Stream Width Ratio? Culvert width Channel width 13

  12. Fish Passage Field Methods Stream Channel Width Edges of rooted vegetation Definite change in vegetation and sediment texture 14

  13. Fish Passage Field Methods Stream Channel Width 15

  14. Fish Passage Field Methods • What is Slope? 19 25 Rise Slope = Run = 60 2000 = .03 = 3% 60 cm 20 m 16

  15. Fish Passage Field Methods What is culvert length ? 20 m 17

  16. Fish Passage Model Channel Width Culvert Diameter Barrier Determination 18

  17. Fish Passage Model Barrier Determination

  18. Crossing Data

  19. Crossing Data

  20. iMap BC • http://www.data.gov.bc.ca/dbc/geo/imapbc/index.page

  21. IMAP BC

  22. Acknowledgements • Fish Passage Technical Working Group • Peter Tschaplinski MoE • Dave Maloney FLNRO • Ian Miller FLNRO • Brian Chow FLNRO • Craig Mount MoE • Terje Vold • Angeline Tillmans • Gord MacKinnon • George Robison • Simon Norris (Hillcrest Geographic) • Rodger Packham (MoE Retired) • Leslie Mckinley • Sean Wong • Ministry of Environment • Ministry of Forests, Lands and Natural Resource Operations. • Department of Fisheries • and Oceans • Council of Forest Industries • Ministry of Transportation and Highways

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