What is it?
Hydroelectric power uses running water to generate electricity, whether it's a small stream or a larger river.
Small or micro hydroelectricity systems, also called hydropower systems, can produce enough electricity for lighting and electrical appliances in an average home.
How does it work?
All streams and rivers flow downhill. Before the water flows down a hill, it has potential energy because of the height it is at. Hydropower systems convert this potential energy into kinetic energy inside a turbine, which drives a generator to produce electricity. The greater the height and the more water there is flowing through the turbine therefore the more electricity can be generated. (The amount of electricity a system actually generates also depends on how efficiently it converts the power of the moving water into electrical power.)
"a hydropower system can generate 24 hours a day, often generating all the electricity required."