Measuring the hydraulic effect of hydrokinetic energy extraction in the Tanana River, Alaska

Journal Article

Title: Measuring the hydraulic effect of hydrokinetic energy extraction in the Tanana River, Alaska
Publication Date:
August 29, 2019
Journal: Journal of Ocean Engineering and Marine Energy
Volume: 5
Issue: 3
Pages: 241-250
Publisher: Springer
Stressor:
Technology Type:

Document Access

Website: External Link

Citation

Edgerly, E.; Ravens, T. (2019). Measuring the hydraulic effect of hydrokinetic energy extraction in the Tanana River, Alaska. Journal of Ocean Engineering and Marine Energy, 5(3), 241-250.
Abstract: 

During two field seasons, a 1.93 m diameter, open-center style, hydrokinetic device was deployed from a pontoon barge in the Tanana River, in Alaska. Near-surface velocity was roughly 1.7 m/s and 2 m/s at the deployment site during September 2014 and July 2015, respectively. Velocity and turbulence were measured in the vicinity of the turbine location using an acoustic Doppler velocimeter (ADV) and an acoustic Doppler current profiler in order to characterize the impact of the turbine on river hydraulics and turbulence. ADV measurements showed velocities being 97.8% recovered within 18.1 turbine diameters and fully recovered within 20.7 turbine diameters. ADV measurements also indicate a 520% increase in turbulence intensity at 2.6 turbine diameters downstream which appeared to resolve within 20.7 turbine diameters.

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