Reducing the impact on fish populations by rethinking the traditional turbine design
While hydropower is emission-free, the use of traditional turbines can result in negative impacts on fish, especially migratory fish. Fast-spinning, traditional blades can cut them, sudden changes in pressure can kill them, as can being pushed through the turbine. But a new pin-wheel design turbine with blunt edges can act as "an airbag" and greatly improve the outcomes for fish. https://www.bbc.com/future/article/20200713-the-most-powerful-renewable-energy
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