Lake Creek Instream Flow Study Status Update Fish/Aquatics Meeting - PowerPoint PPT Presentation

Lake Creek Instream Flow Study Status Update Fish/Aquatics Meeting June 2007

INSTREAM FLOW STUDIES Habitat-Based Model • Physical Component – Physical Habitat Surveys – Study Site and Transect Weighting • Biological Component – Species Distribution – Barrier Identification – Species Suitability Criteria and Preferences • Hydraulic Component – Instream Flow Modeling for Habitat • Hydrology Component – Inflow from Drop Structure to Cowlitz River

Instream Flow Study – Physical Component • Physical Habitat Survey (2004) – Lake Creek into 5 reaches • Study Site Selection – Lake Creek from Drop Structure to Confluence with Cowlitz River – Four Study Sites Selected – 34 Transects Measured

Table 2.4-4 Final Transect Weighting, Study Site 4 (Reach 5) Transect Transect Description Frequency Percentage 1 Wide Run 1.33 8.33% 2 Plunge Pool 1.33 8.33% 3 Narrow Run (boulder and cobble) 1.33 8.33% 4 Pool (bedrock on sides; cobble/boulder on margins 1.33 8.33% 5 Split Channel Glide ((boulder/cobble) 1.33 8.33% 6 Run (below plunge pool) 1.33 8.33% 7 Split Channel w/lateral pool 2 12.50% 8 Wide Glide 1.33 8.33% 9 Pool Tailout 2 12.50% 10 Wide Pool 1.33 8.33% 11 Riffle (gravel and cobble) 1.33 8.33% 16 100%

Table 2.4-5 Lake Creek Study Site Weighting Study Site Begin End Total Percentage 1 0.0 0.7 0.7 13.0% 2 0.7 3.5 2.8 51.9% 3 3.5 4.9 1.4 25.9% 4 4.9 5.4 0.5 9.3% Total 5.4 100.0%

Instream Flow Study – Biological Component • Identification of Barriers • Species Distribution • Species Periodicity • Habitat Suitability Index (HSI) Curves (preference curves)

Identification of Barriers • Chute/Falls at RM 1.03 – Barrier for • Chinook Salmon • Coho Salmon • Sea-run Cutthroat Trout • Falls at RM 1.95 – Barrier for • Steelhead Trout • Rainbow Trout have access to all of Lake Creek

Lake Creek Study Sites and Reaches and Fish Distribution 3,500 Drop Structure SS4 SS3 3,000 2,500 Rainbow Elevation (ft) Steelhead Barrier Barrier Chinook Coho Cutthroat 2,000 SS2 1,500 SS1 Reach 4 Reach 5 Reach 3 Reach 2 Reach 1 1,000 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 RM

Table 2.6-1 Lake Creek Fish Periodicity Species Lifestage Oct Nov Dec Jan Feb Mar April May June July Aug Sept Spawning Spring Chinook Incubation Rearing Spawning Coho Incubation Rearing Spawning Steelhead Incubation Rearing Spawning Cutthroat Trout Incubation Rearing Spawning Rainbow Trout Incubation Rearing Based on: John Serl, WDFW Fish Biologist, Cowlitz Falls (May 10, 2007)

Preference Curve Selection • WDFW/WDOE Habitat Suitability Index (HSI) Curves used (spawning and rearing) – Steelhead trout – Chinook salmon – Coho salmon – Rainbow trout – Cutthroat trout – Trout Winter Rearing

Fish Distribution and Preference Curve Utilization • Below RM 1.03 (Spawning and Rearing) – Steelhead, Chinook, Coho, Rainbow and Cutthroat Trout • Between RM 1.03 and 1.95 (Spawning and Rearing) – Steelhead (with C f =1.0) – Rainbow Trout • RM 1.95 – 5.4 – Rainbow Trout (Spawning and Rearing)

Amphibians • Species/Life Stages • Periodicity • Distribution • Species Habitat Suitability Criteria

Amphibians • Species and Life Stages Modeled – Giant Salamander ( Dicamptodon spp. ) • Eggs • Larvae – Coastal Tailed Frogs ( Ascaphus truei ) • Eggs • Larvae – Cascade Torrent Salamander ( Rhyacotrin cascadae ) • Eggs • Larvae

Amphibian Periodicity • Giant Salamander – Eggs: March – October – Larvae: Year Round • Coastal Tailed Frog – Eggs: May – September – Larvae: Year Round • Cascade Torrent Salamander – Eggs: April – December – Larvae: Year Round

Amphibian Distribution • Tailed Frogs: – RM 1.03 – 5.4 • Reaches 2 – 5 • Study Sites 2 – 4 • Giant Salamander – RM 1.03 - 5.4 • Reaches 2 – 5 • Study Sites 2 – 4 • Torrent Salamander – RM 3.5 – 4.9 • Reach 4 • Study Site 3

Hydraulic Component • Calibration Flows • Error checking • Model Calibration – 3 Velocity Set Models – 1 Velocity Set Models • Model Approval • Input HSI Curves • Generation of WUA • Combining Models for Transects/Study Reaches

Calibration Flows • 2004 – Spill Releases • 3 cfs base flow at Drop Structure • 15 – 17 cfs middle flow release • 33 – 35 cfs high flow release • 2006 – Overtopping Release – 130 cfs

Lake Creek Study Site 1 160 140 120 100 Discharge (cfs) 80 60 40 20 0 1 2 3 4 5 6 7 8 9 Transect Low Flow Mid Flow High Flow Spill Flow

Lake Creek Study Site 2 160 140 120 100 Discharge (cfs) 80 60 40 20 0 1 2 3 4 5 6 7 8 Transect Low Flow Mid Flow High Flow Spill Flow

Lake Creek Study Site 3 160 140 120 100 Discharge (cfs) 80 60 40 20 0 1 2 3 4 5 6 Transect Low Flow Mid Flow High Flow Spill Flow

Lake Creek Study Site 4 160 140 120 100 Discharge (cfs) 80 60 40 20 0 1 2 3 4 5 6 7 8 9 10 11 Transect Low Flow Mid Flow High Flow Spill Flow

Middle Flow Measurements, Study Site 1

Study Sites 1 and 2 – 130 cfs Release

Study Sites 3 and 4 – 130 cfs Release

Model Calibration • Generally, Use 3 Velocity Set (Regression) Models to predict velocities and depth ranging from: – 0.4 X the Low Calibration Measurement – 2.5 X the High Flow Measurement • Use Velocity Adjustment Factors (VAFs) to determine how well the model performs – 0.80 – 1.20 = Good (3 Flow Models) • Use 1 Velocity Set (1 Flow) Models to model farther up or down – VAFs can range from 0.1 to 10

Calibration details for Lake Creek Study Site 1 Transect 1 WSE (ft) 96.96 97.24 97.49 97.68 Disch (cfs) 5.00 12.50 25.50 41.00 Rv Pt Sta Elev Orig Rev Meas Orig * Rev * Meas Orig * Rev * Meas Orig * Rev 1 0.00 101.54 2 0.10 99.96 3 0.70 100.67 4 1.40 99.19 5 10.00 98.55 * 6 10.50 97.68 0.01 0.00 7 11.00 97.60 0.09 0.02 8 12.00 97.36 0.13 0.13 0.23 0.23 0.24 9 13.00 97.21 0.17 0.20 0.43 0.45 0.77 0.76 0.46 0.74 10 14.00 97.06 0.09 0.08 0.09 0.17 0.16 0.17 0.23 0.24 0.24 * 11 15.00 96.66 -0.26 0.00 -0.03 0.02 0.18 0.12 0.34 0.39 -0.02 0.13 0.38 * 12 16.00 96.66 0.01 0.06 0.10 0.22 0.53 * 0.64 * 1.57 * 1.25 0.09 0.89 1.13 * 13 17.00 96.66 0.20 0.02 0.00 0.36 * 0.11 0.56 0.54 0.39 0.68 0.70 0.86 14 18.00 96.46 0.01 0.01 0.11 0.09 0.10 0.30 0.40 0.41 1.24 1.02 1.03 15 19.00 96.81 0.43 0.48 0.90 0.97 1.56 1.61 2.18 2.16 0.95 1.70 2.06 16 20.00 96.61 0.52 0.59 0.95 0.86 0.94 1.22 1.25 1.29 1.57 1.55 1.53 17 20.50 96.55 0.54 0.62 0.86 0.79 0.86 1.03 1.03 1.06 1.19 1.19 1.18 18 21.00 96.60 0.51 0.59 0.62 0.68 0.71 0.73 0.75 0.74 0.71 0.63 0.80 19 21.50 96.41 0.25 0.28 0.52 0.42 0.46 0.45 0.62 0.65 0.97 0.78 0.78 20 22.00 96.66 0.12 0.13 0.32 0.28 0.30 0.49 0.55 0.57 0.90 0.83 0.83 21 22.50 96.41 0.18 0.20 0.35 0.38 0.58 0.60 0.79 * 0.79 0.44 0.40 1.01 22 23.00 96.53 0.30 0.34 0.52 0.45 0.49 0.53 0.61 0.63 0.79 0.72 0.72 23 23.50 96.61 0.21 0.24 0.43 0.40 0.43 0.64 0.63 0.65 0.81 0.82 0.81 24 24.00 96.63 0.25 0.28 0.41 0.44 0.59 0.61 0.73 0.72 0.48 0.48 0.83 25 24.50 96.68 0.18 0.20 0.27 0.26 0.28 0.38 0.34 0.35 0.36 0.39 0.39 26 25.00 96.41 0.13 0.15 0.37 0.36 0.39 0.87 0.76 0.78 1.11 1.21 1.20 * 27 25.50 96.31 0.17 0.22 0.40 * 0.45 * 0.74 0.77 1.08 1.06 0.00 0.77 1.05 28 26.00 96.41 0.32 0.37 0.55 0.60 0.82 * 0.84 * 1.03 1.01 0.54 1.13 0.83

Table 1a. Velocity Adjustment Factors, Lake Creek Study Site 1. Three Flow Deck Trans 1 Trans 2 Trans 3 Flow Orig Rev Orig Rev Orig Rev 5 0.7809 0.9277 0.6972 0.8397 0.7533 0.8746 6 0.8053 0.9439 0.7694 0.8881 0.7747 0.9039 7 0.8265 0.9577 0.8292 0.9268 0.8054 0.9298 8 0.8446 0.9686 0.8862 0.9558 0.8371 0.9527 9 0.8613 0.9786 0.9261 0.9806 0.8522 0.9311 10 0.8765 0.9872 0.9540 0.9950 0.8790 0.9589 12 0.9025 1.0002 1.0009 1.0227 0.9261 1.0020 14 0.9224 1.0074 1.0293 1.0381 0.9602 1.0234 16 0.9409 1.0139 1.0471 1.0475 0.9830 1.0344 18 0.9569 1.0184 1.0567 1.0522 1.0061 1.0466 20 0.9708 1.0211 1.0604 1.0534 1.0241 1.0549 25 0.9984 1.0225 1.0534 1.0471 0.9735 1.0287 30 1.0182 1.0186 1.0337 1.0331 0.9753 1.0187 35 1.0319 1.0109 1.0082 1.0156 0.9645 1.0060 40 1.0409 1.0006 0.9803 0.9966 0.9442 0.9917 45 1.0461 0.9885 0.9518 0.9770 0.9176 0.9778 50 1.0482 0.9752 0.9238 0.9575 0.8864 0.9646 55 1.0479 0.9610 0.8967 0.9385 0.8517 0.9520 60 1.0456 0.9461 0.8708 0.9201 0.8146 0.9401 65 1.0414 0.9309 0.8462 0.9025 0.7760 0.9287 70 1.0359 0.9154 0.8228 0.8856 0.7367 0.9178 75 1.0291 0.8998 0.8007 0.8694 0.6974 0.9073 80 1.0213 0.8842 0.7797 0.8540 0.6586 0.8973 85 1.0126 0.8686 0.7599 0.8392 0.6208 0.8876 90 1.0033 0.8532 0.7411 0.8251 0.5842 0.8783 95 0.9933 0.8379 0.7233 0.8115 0.5492 0.8693 100 0.9828 0.8228 0.7064 0.7986 0.5159 0.8605