Hydrodynamic, water quality and fish bioenergetics modeling in Lake Roosevelt

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Hydrodynamic, water quality and fish
bioenergetics modeling in Lake Roosevelt

• Michael McKillip and Dr. Scott WellsDepartment
  of Civil and Environmental EngineeringPortland
  State University
• November 14, 2007
• Lake Roosevelt Forum
• Spokane, Washington

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Presentation Outline
Kokanee Zooplankton Phytoplankton

• Key Lake features
• W2 - Model summary
• Fish Model (Mazur)
• Results Fish Growth Potential
• Temperature
• Hydrodynamics
• Nutrients

Grand Coulee Dam (USBR website)
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Limnological summary (1) oligotrophic
Mean annual trophic status index, 2000 22 to
40 Oligotrophic to meso-oligotrophic (2000
LRFEP Annual Report)
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Limnological summary (2) spring drawdown

• Annual desiccation
• sparce zoobenthos
• riverine-lacustrine ecological shift

Forebay stage
Detention time
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Colville River, 1997
Photographs taken by LRFEP
Gifford boat ramp, 1997
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CE-QUAL-W2 Reservoir Model

• W2 - Widely Used Long Narrow Systems
• Reservoirs (319)
• Lakes (436)
• Rivers (286)
• Others (92)

Rectangular Model Grid (2 m vertical) ( 500,
1000 m, longitudinal) 533 active segments
Bathymetry Contour (Horizontal 22 m) (Vertical 1
m)
Segment delineation
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Model Input Measurement Locations
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1
Kettle Falls
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1 Columbia River, (USGS, Environment
Canada) 2 Kettle River, (USGS) 3 Colville River
(USGS) 4 Little Falls Dam (Avista) 5 Grand Coulee
Dam forebay, (USGS, USBR, USACOE)
Six-mile downstream (USACOE) Feeder Canal
with Banks Lake (USGS)
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Grand Coulee
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Seven Bays Marina
Hydrodynamic, Temperature Meteorologic LRFEP
Hydrolab
Cheney, SRML
Odessa
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W2 Conceptual schematic algae zooplankton
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• Fish Model Drivers
• Temperature
• Prey (food)
• Light (season, turbidity)

• W2 Processes Factors
• Water temperature
• Phytoplankton epiphyton
• Zooplankton
• Carbonate Chemistry
• Nutrients
• Dissolved Oxygen
• Light Shading
• Wind
• Bathymetry
• Outlet Geometry

• Not Considered
• Entrainment
• Predation
• Angling
• Interspecies competition
• Wintering
• Precocity
• Spawning

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Model-data comparison Grand Coulee Dam
Temperature statistics, C
Daily-average
15-minute averaged
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Temperature Distribution
Animations Temperature Cladocera Water Age
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Fish Growth Potential

• By cell
• fixed mass
• prescribed mass
• model-predicted mass
• By segment with diel foraging strategy

animation
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Diel Foraging Strategy
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Diel Foraging Strategy
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Foraging Depth - Temperature Limited
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Growth Underprediction

• Literature range /- 10-50
• Spatial mobility
• Littoral habitat
• Cold water refugia
• Uncertainties in prey energy density
• Underestimation of foraging

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Increased Phosphorous(upstream of Grand Coulee)
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Increased Phosphorous Prey Limited
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Reservoir Operations Sensitivity
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Kokanee are not strictly prey limited

• Large, nutritionally important Daphnia are
  present in stomachs and net catches. (Fields, et
  al., 2004)
• Temperature has large influence on consumption.
• Bioenergetics model
• Literature value of 15 C optimal temperature
• Kokanee do grow
• foraging strategies
• cold-water refugia, horizontal migration

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Conclusions

• Obvious
• Summer temperatures are above optimal
• More prey more growth
• Spokane Arm productive traps P prey
• Columbia P prey stem from Spokane R.
• FGP not sensitive to changes in
• reservoir stage, flow
• stratified water temperature (vertical migration)

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Acknowledgements

• Spokane Tribe of Indians
• Deane Pavlik-Kunkel
• Ben Scofield
• Univ. of Washington
• Dave Beauchamp
• Mike Mazur
• Portland State Univ.
• Rob Annear
• Chris Berger
• Scott Wells

• Data sources/providers
• USGS
• USBR
• Avista Utilities
• Eastern Washington Univ.
• US Forestry, Agrimet
• Environment Canada
• Spokane Tribes
• WA Ecology
• Murray, Smith Associates, Inc.