Hydropower, or hydroelectric power, is a renewable source of energy that generates power by using a dam or diversion structure to alter the natural flow of a river or other body of water.

Hydropower (from Ancient Greek ὑδρο -, "water"), also known as water power or water energy, is the use of falling or fast-running water to produce electricity or to power machines.

Apr 20, 2023 · At hydropower plants water flows through a pipe, or penstock, then pushes against and turns blades in a turbine that spin to power a generator to produce electricity.

Nov 14, 2025 · hydroelectric power, electricity produced from generators driven by turbines that convert the potential energy of falling or fast-flowing water into mechanical energy.

There are four main types of hydropower plants: run-of-river, storage, pumped storage and offshore hydropower. Only a small minority of the world's dams are built for hydropower, with the majority …

Oct 8, 2025 · Hydropower is energy created from fresh, moving water. Over 2,000 years ago, the ancient Greeks used the power in rivers and streams to rotate wooden wheels and crush grain to …

Hydropower is essential to our clean energy future. Solar, wind and battery storage may grab the headlines, yet a simple truth is often overlooked: we can’t achieve deep decarbonization of our …