Metrics and Preliminary findings Presentation by Richard Thompson Ministry of Environment Difference Between 2 Turbulence and increased velocity Perched culverts No streambed substrate and low flow issues ID: 1019290
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1. Assessing Fish Passage at Culverts Metrics and Preliminary findings.Presentation by Richard ThompsonMinistry of Environment
2. Difference Between2
3. Turbulence and increased velocityPerched culvertsNo streambed substrate and low flow issuesWhat are the most common issues resulting in changes in fishes ability to move up a stream channel?3
4. Maintain channel continuity through the crossingGoalStreambed diversity and material are similar to natural channelWater Velocities and depths, cover and resting areas are similar to the natural channelOutcome : Crossing is transparent to aquatic species4
5. How can we evaluate culverts for Fish Passage?Experiments/surveys observing actual fish passage successVelocity measurements Hydraulic analysisMeasurement of surrogates indicative of hydraulic conditionsFish PassageField Methods5
6. This protocol is an example of the surrogate methodologySurrogate key advantages:Limited trainingvery efficient any time of the yearInformation can be used in other analysisFish PassageField Methods6
7. Five Key indicators that go into our Surrogate determination Embeddedness Outlet Drop Stream Width Ratio Culvert Slope Culvert LengthFish PassageField Methods
8. What is embeddedness?Fish PassageField Methods
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11. What is outlet drop?10.Outlet Drop (cm)Invert –ToP (A)ToP – BoC (B)Outlet Drop A+BOutlet drop = A + BCulvert invertOutlet controlABFish PassageField Methods11
12. I can’t reach
13. What is Stream Width Ratio?Fish PassageField Methods13Culvert widthChannel width
14. Stream Channel WidthDefinite change in vegetation and sediment textureEdges of rooted vegetationFish PassageField Methods14
15. Stream Channel WidthFish PassageField Methods15
16. What is Slope?20 m60 cmSlope = RiseRun= 602000= .03 = 3%Fish PassageField Methods25191612.Culvert Slope (%) (less than 4% use level) (nearest 0.1%) (otherwise clino)
17. 20 mFish PassageField Methods1713.LengthWhat is culvert length ?
18. Barrier DeterminationChannel WidthCulvert DiameterFish PassageModelEmbedded(9)valueOD(10)valueSWR(11)valueSlope(12)valueLength(13)valueScore>30 cm. or > 20% of Diameter and continuous(Full)0< 150< 1.00< 10< 150< 30 cm. or 20% of Diameter but continuous(Partial, contin.)515 - 3051.0 - 1.331 - 3515 – 303No embeddment or discontinuous(None, discont)10> 3010> 1.36> 310> 30618
19. Fish PassageModelBarrier DeterminationCumulative ScoreResult0 - 14passable15 - 19potential barrier> 20barrier
20. Crossing Data
21. Crossing DataProvinceKootenayNumber48701384% Fail7161% Outlet Drop >30 cm4347% Stream Width Ratio > 17478% Slope >1%7781
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24. iMap BChttp://www.data.gov.bc.ca/dbc/geo/imapbc/index.page
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26. IMAP BC
27. AcknowledgementsFish Passage Technical Working GroupPeter Tschaplinski MoEDave Maloney FLNROIan Miller FLNROBrian Chow FLNROCraig Mount MoETerje VoldAngeline TillmansGord MacKinnonGeorge RobisonSimon Norris (Hillcrest Geographic)Rodger Packham (MoE Retired)Leslie MckinleySean WongMinistry of EnvironmentMinistry of Forests, Lands and Natural Resource Operations.Department of Fisheries and OceansCouncil of Forest IndustriesMinistry of Transportation and Highways