The electricity generation from the water is called as the hydroelectric power plant.There are certain steps that is involved in the production of electricity from water.
The water that is behind he dam is collected into a pipe which is known as penstock.
The water then is pushed against the blades of the turbine, instead of using the steam for rotating the turbine, water is used for the rotation of turbines.
The moving turbines converts the kinetic energy of water into the rotating energy and then it turns on a generator by the help of the turbine.
The electricity produced then travels over long distance to home, schools, et cetera.