Quote Originally Posted by Getty View Post
On reflection, I know there would be no impact on Huka.
However, thinking deeper, I wonder why the power generating companies dont utilise Pelton wheels, and/or Archimedes screws inside the penstocks, so the water flow is better used on its gravity rush to the bottom generators.
There would be some impedance, but I suspect a nett gain....
The energy you take from the water with your wheels and screws means less energy for the turbines so overall no gain.

I believe your other ideas may not be practible either.

Now building a pumped hydro using the craters of the major north island volcanoes would be a different matter all together.