Here’s a nice case study on small scale hydro power from Practical Preppers, where they install a neat micro hydro power system in a small mountain stream. They use a Turgo turbine/generator which can handle more volume and less head.
The “head” is the fall height (vertical drop) of the water from the starting point to the turbine, and in this case study they have about 30 feet (9 m) of head.
The goal is to be able to charge a 24v battery bank and produce about 10,000 watts of power a day.
It’s a great video. Don’t miss 4:30 where he turns on the water flow to the turbine. That’s the sound of power generation!
Check out part 2 below, an update a few months later on the micro hydro power system they installed.