The problem is really down to finding places where you can actually build something like a hydroelectric power plant.

You need a large area you can safely flood. (No villages in the area or only villages you can buy out the owners of) or a high up lake.

The area to flood needs to have the geology required to construct a dam safely.

And finally, the area needs to be pretty high up and have an area below you can direct the outgoing water to.

A shocking amount of microcontroller manufacturers have eclipse based IDEs for their chips. Thought that seems to be going out of style, luckily.