It depends. A hydroelectric power installation at a pre-existing dam (it's called retrofitting) generally has a relatively small effect on the surroundings, and very little effect on the river or stream that supplies it with water. However, a hydropower project that includes a new dam and reservoir will have a considerable impact on the stream, as well as on the surrounding area.
they provide hydroelectric power.
Near rivers.
hydroelectric
it comes from the sea or rivers originally.
All rivers that flow downstream are capable of producing hydroelectric power.
It is the energy obtained from hydroelectric power plants; on rivers, tidal, etc.
Destruction of free-running rivers and their ecosystems
Hydroelectric Power!
Water helps to generate hydroelectric power, which has commercial use.
Hydroelectric power plants can only operate near rivers. This is because the water is the source of energy for this plant.
Venezuela also uses its rivers to great advantage as sources of hydroelectric power.
Hydroelectric power is already one of the current methods and has been for well over 100 years. No it cannot completely replace other means of generating electricity. For one thing most western nations have already maxed out their usage of hydroelectric power and some have actually had to tear down some older dams due to environmental damage caused by the dam. Rivers that can be economically dammed to generate power are a very limited resource.