water wheel power generation
So, briefly and you can research detailed information about water wheels and electricity generation.

Power = Q (flow in L/s) * g (gravity) * H (height) * efficiency

Gravity can be assumed as 10 due to the inaccuracies - because none of the other items will be precise...

High head tends towards Pelton wheel installations while Low head high flow are Kaplan turbines. There are several different turbines available and Pelton for example can have a single or multiple jets...

Any installation will need intake valve control and usually a surge pipe to deal with rapid intake valve closing and dissipating the inertial forces...

There are lots of other things to be considered, one of the most important is having permission to extract the water from the source and also to put it back into the source after it has been through the turbine. For that you will need to contact the relevant authority.

There are, in many countries, people who specialize in this sort of thing, try looking under renewable energy and check out those who have successful installations...