Hanna, L.

English

ScholarWorks@UMass Amherst

University of Massachusetts AmherstScholarWorks@UMass AmherstInternational Conference on Engineering andEcohydrology for Fish PassageInternational Conference on Engineering andEcohydrology for Fish Passage 2014Jun 10th, 4:50 PM - 5:10 PMHelix Design for Downstream Fish PassageL. HannaUniversity of Wisconsin - MadisonFollow this and additional works at: https://scholarworks.umass.edu/fishpassage_conferenceThis Event is brought to you for free and open access by the Fish Passage Community at UMass Amherst at ScholarWorks@UMass Amherst. It hasbeen accepted for inclusion in International Conference on Engineering and Ecohydrology for Fish Passage by an authorized administrator ofScholarWorks@UMass Amherst. For more information, please contact scholarworks@library.umass.edu.Hanna, L., "Helix Design for Downstream Fish Passage" (2014). International Conference on Engineering and Ecohydrology for FishPassage. 74.https://scholarworks.umass.edu/fishpassage_conference/2014/June10/74Cle Elum Helix Design for Downstream Fish PassageLeslie Hanna, Jim Higgs, Brent Mefford, Jason Wagner Hydraulic Investigations &Research LaboratoryLarge Storage Reservoir  Challenges• Reduce Operation and Maintenance costs• Dam Height• Large water surface fluctuations due to seasonal releases.Yakima Projects DamsHelix ConceptAdvantages• Long, relatively mild slope • Small footprint• Smooth transitionsPreliminary (10% slopeIntake Structure• Follows Reservoir bank-line • Overlapping intake zonesJuvenile Intake StructureFlow regulation and energy dissipation structure (“The Helix”)Juvenile downstream tunnelExisting DamExisting SpillwayAdult Collection FacilityTunnel outfall• Initial Helix geometry– 6 ft diameter pipe – 52 ft Helix diameter– 11.75 ft drop between loopsHelix CFD studies (Jim Higgs)Sensitivity Analysis - shapes6-ft diameter pipe with 3 helix diameters4-ft chamfered rectangular box4-ft and 5-ft rectangular box4-ft and 5-ft  rotated rectangular boxesSensitivity Analysis(from fish’s perspective) Surface roughness = 0.0042 feetTotal area with velocity less than 1 ft/s cross-velocity (blue shades indicate a more favorable condition).Tightness of rotational flows.Maximum sweeping velocity.Rollover Parameter (ROP) - Difference in Max     and Min vertical velocityROP = 5.06 6-ft diameter pipe with 3 helix diametersROP = 5.06 ROP = 5.19 ROP = 3.33 4-ft chamfered rectangular box 5-ft rectangular boxROP = 4.37 ROP = 5.90 ROP = 4.04ROP = 4.10 ROP = 3.18 5-ft  rotated rectangular box4-ft rotated rectangular box4-ft rectangular boxHelix Numerical analysis• Most stable flume geometry Large sweet spot – low secondary rotational velocities Appears to have no excessive sloshing or rolloverROP = 3.18 Helix Model Construction    (1:9.5 scale)• At every cross section -- horizontal floor,slope varies across width of flume 8.5%Inside wall 7.8% centerline 7.14% Outside wallHelix Physical Model Study Objectives• Verify CFD and Refine into the final design for Cle Elumdownstream passage Evaluate flow conditions in helix flume to ensure no excessive sloshing or roll-over Determine flow depths and velocities in the flume Evaluate transitions  From inlet structure into helix structure From helix to downstream conduitHelix operating at 300 ft3/sHelix operating at 400 ft3/sBeads at 300ft3/sString Loop 2 at 400 ft3/s2 inch trout at 300 ft3/s - 22 inch trout at 300 ft3/s - 32 inch trout at 400 ft3/s - 42 inch trout at 400 ft3/s - 5-4-3.5-3-2.5-2-1.5-1-0.500 1 2 3 4 5 6Helix Loop # Below Flow Entrance (#)Flow Depth at 300 ft3/s (ft)Outside Wall DepthInside Wall Depth-4-3.5-3-2.5-2-1.5-1-0.500 1 2 3 4 5 6 7Helix Loop # Below Flow Entrance (#)Flow Depth at 400 ft3/s (ft)Outside wall Depth at 400 cfsInside Wall Depth 400 cfs-4-3.5-3-2.5-2-1.5-1-0.500 10 20 30 40Helix Loop # Below Flow Entrance (#)Average Velocity at 300 ft3/s (ft/s)Outside Wall Avg VelocityMiddle Avg VelocityInside Wall Avg VelocityOverall Avg Velocity-4-3.5-3-2.5-2-1.5-1-0.500 10 20 30 40Helix Loop # Below Flow Entrance (#)Average Velocity at 400 ft3/s (ft/s)Outside Wall Avg VelocityMiddle Avg VelocityInside Wall Avg VelocityOverall Avg VelocityWall of Death Daredevil Motorcycle Stunt Riders(It feels like “down” is towards the wall)Next Steps• Refine inlet structure design • Refine Helix transitions• Final Design completion 6/30/2015• Construction begins Nov 2015?AcknowledgmentsSpecial Thanks to:• Yakama Nation: Mark Johnston, Brian Saluskin, Dave Fast• NMFS: Bryan Nordlund, Sean Gross, Jeff Brown• Yakima Basin Joint Board: David Child (the YBJB represents the major irrigation districts)• WA State Department  of Fish & Wildlife (WDFW): Bruce Heiner,John Easterbrooks• WA State Department of Ecology: Derek Sandison• Bureau of Reclamation: Joel Hubble, Wendy Christensen, Brent Mefford, Jason Wagner, Steve Montague, Walter Larrick,Questions?Leslie Hanna, Lhanna@usbr.gov, 303-445-2146•End

Helix Design for Downstream Fish Passage

https://scholarworks.umass.edu/cgi/viewcontent.cgi?article=1667&context=fishpassage_conference

Helix Design for Downstream Fish Passage

Abstract

Similar works

Full text

Available Versions

ScholarWorks@UMass Amherst