How does gravity hydropower work?

Question: How does gravity hydropower work?

Answer: Gravity dams work like any other hydroelectric power source in terms of how they generate power. Water flows through a tube (pen stock) and into a turbine that generates electricity before flowing out of the system. The difference in gravity dams is how they resist the forces created by holding back so much water. Essentially they are just so massive in size that the force of gravity is enough to overcome those forces created by the water. This is the only real drawback of this type of dam when compared to arch dams for example, they require a lot of concrete in order to obtain the mass needed to resist the force of the water.

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