Sensitivity Analysis of Adjustable River Surf Waves in the Absence of Channel Drop

Most artificial river wave technologies require a drop in the riverbed to generate recreational surf waves; herein a new technology is introduced that can be used on a flat bed. The mechanism includes an adjustable ramp, transition and kicker, which can be independently manipulated to generate a sur...

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Bibliographic Details
Published in:Water (Basel) 2021-05, Vol.13 (9), p.1287
Main Authors: Asiaban, Puria, Rennie, Colin D., Egsgard, Neil
Format: Article
Language:English
Subjects:
Analysis
Experiments
Flatbed
Flow rates
Hydraulics
Mathematical models
New technology
Numerical models
Ocean waves
River beds
Rivers
Sensitivity analysis
Simulation
Surf
Surfing
Tailwater
Turbulence models
Velocity
Viscosity
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Summary:Most artificial river wave technologies require a drop in the riverbed to generate recreational surf waves; herein a new technology is introduced that can be used on a flat bed. The mechanism includes an adjustable ramp, transition and kicker, which can be independently manipulated to generate a surf wave. A 3-D numerical model of the described mechanism is developed based on a prototype Kananaskis River wave in Alberta, Canada, and is calibrated by means of physical model data. Numerical experiments are conducted to demonstrate sensitivity of the wave to geometric features of each element of the structure in different hydraulic conditions such as flowrate and tailwater depth. Results are presented in dimensionless form to be generalizable and describe the wave behavior. It is shown that the ramp slope, the heaviest and most expensive element of the structure, has a minimal effect on the wave profile, while the tailwater depth, kicker geometry and kicker position can significantly augment and accelerate the wave.
ISSN:2073-4441
2073-4441
DOI:10.3390/w13091287