Not really the same at all. The gravitation water vortex power plant is designed in such a way that fish can easily go through in both directions because the t

Not really the same at all. The gravitation water vortex power plant is designed in such a way that fish can easily go through in both directions because the turbine is in the upper, not lower portion of the vortex, leaving the drain clear for fish (and a certain extent, debris) to pass through. This is just a turbine installed in the drain. It's really not much different than a traditional hydro plant.