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Hydroelectric power generates approximately 10% of the nation's energy. Credit: US Army Corps of Engineers. By capturing flowing water, it creates enough kinetic energy, which can be captured and turned into electricity. We call this by-product hydroelectric power or hydropower.

Commonly, this is harnessed by a hydroelectric power plant, dam, reservoir, or a river. Water flows through a turbine, rotating propellers and, which in turn activates a generator engine to generate electricity. However, hydroelectricity necessarily does not require an extensive dam. Hydroelectric power plants can use a small channel or waterway to funnel water through a turbine. Energy collected from hydroelectricity can be obtained and stored for later use.

Generators will rotate turbines backward; this kinetic energy causes turbines to pump water of a river or reservoir to an upper reservoir, in turn, this is where power will be stored. Appropriating the potential energy, the water is released from an upper reservoir into a lower river or reservoir. Which, spins turbines forward, activating the generators to produce electricity.