renewable energy by water

I need help, I am an innovation manager and my job is to formulate and develop innovative prototypes that help improve agricultural production in the region I am.
The need they have in a certain part of the community that is far from the city is to have electric power, I need innovative ideas to solve this problem in the easiest way and with the help of technology. We have a small river near the community.

So you want to put in a watermill power alternator to make electricity?
Could use a combination of that and Solar to charge a bank of batteries, and a DC/AC inverter from there to have an AC s source. Or just power stuff from DC.

We have a small river near the community.

That would be one possibility, if there is sufficient vertical drop. Other possibilities include sunshine and wind.

None of these would be innovative, though, as there are millions of web pages describing how to tap these sources of energy.

How much electric power do you have in mind? Charge cell phones? Power small lights at night? Run large electric motors for agriculture?

rubendariosolarte11:
The need they have in a certain part of the community that is far from the city is to have electric power, I need innovative ideas to solve this problem in the easiest way and with the help of technology. We have a small river near the community.

At this stage of the development of your idea it is not an Arduino problem - it is a question for geography, meteorology and construction and engineering. Maybe property-rights will also be an important factor.

As @jremington has said there are probably millions of more suitable web pages for advice.

If you settle on a technical solution that can benefit from an Arduino-based control system and if you have difficulty implementing the Arduino system then will be appropriate time for questions here.

...R