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A new study by Colorado Parks and Wildlife researchers suggests man-made whitewater parks that create “play waves” for kayakers and other recreationists are having a negative impact on fish passage.
Colorado’s rivers are well-loved by both whitewater enthusiasts and anglers. Yet, as whitewater parks have been constructed throughout the state, researchers say the potential impacts on fish and anglers have not always been taken into consideration.
“Essentially, they’re kind of at odds,” said Eric Richer, an aquatic research scientist with the state wildlife agency and one of the lead authors of the study. “Fish want slow, deep water and whitewater parks, to create the hydraulic wave, are constricting water into a steep chute or drop, often over a surface that has been grouted to try to make it as smooth as possible to get those velocities elevated.”
The state wildlife agency first began looking into the impacts of white water parks on fish passage a number of years ago after one scientist who is an avid angler was fishing near the white water park on the Arkansas River near Buena Vista, Richer said. The researcher noticed that he was catching more fish downstream of the man-made structure than he was as he worked his way upstream through the structure.
Researchers identified more than 40 white water parks across Colorado that are either already built or are in the planning stages. There are whitewater parks on the Colorado River near Glenwood Springs, the Roaring Fork near Basalt, the Ten Mile Creek in Frisco, the Pumphouse in Gore Canyon near Kremmling and dozens of other locations.
Read the full story from our partner at vaildail.com.
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Ryan Spencer
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