Hydroelectricity, or hydroelectric power, uses the energy from flowing or falling water to operate turbines that spin generators to produce electricity. Dams are often used to store water in reservoirs that is then released to flow through turbines, turning them to generate electricity. The largest current hydroelectric project is the Itaipu Dam between Brazil and Paraguay, although the Three Gorges Dam in China will become the largest once completed.

1. How water turbines can be used to produce electricity
(energy)

2. Hydroelectricity, or hydroelectric power, is a form of
hydropower that uses the energy released as a result of
water falling, or flowing downhill. The energy
contained in the flowing water is used to produce
electricity by operating some form of generator. For
example the water turbine.
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3.  Hydroelectric power is usually generated at dams or
other placed where water falls from a height.
 The energy that may be extracted from water is not
measured by the volume of water, although the volume
is important for keeping the turbine moving.
 Wellington Dam
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projects/wellington-dam-remedial-works
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4.  Around 19% of the world electricity is generated this
way and in 2005, accounted for more than 63% of the
total electricity generated from renewable sources.
 Currently the largest hydro electric project in the
world is the Itaipu Dam with total capacity of 12,600
megawatts on the border of Brazil and Paraguay.
However, on completion, China's massive "Three
Gorges Dam" will be the largest.
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5. http://www.worldtourismplace.com/itaipu-dam-one-
of-seven-wonders-of-the-modern-world/
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6.  A typical hydro-electric scheme consists of a dam
behind which a reservoir of water is held. When
electricity is in demand, valves will be
released, allowing the water to flow downhill to a
power station where turbines will be made to turn by
the force of the water flow. Connected to
generators, electricity can be produced. The water is
then allowed to return to the original riverbed or a
nearby river.
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