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Running water is a great source of energy. Turbines and dynamos are used to generate electricity from water moving with high velocity and great falls. This electricity is called Hydro-electricity. Hydro-electricity is the cheapest and most versatile source of energy among all the known renewable energy. China is the largest producer of hydro-electricity. Important hydro-electricity producing countries are: China, Canada, Brazil, the United States of America, Russia, India, Norway and Japan.
S.No. | Hydro-electricity power | Installed Capacity (MW) | State | River |
| 1. | Tehri Dam | 2400 | Uttarakhand | Bhagirathi |
| 2. | Srisailam Dam | 1670 | Andhra Pradesh | Krishna |
| 3. | Nagarjuna Sagar Dam | 960 | Andhra Pradesh | Krishna |
| 4. | Sardar Sarovar Dam | 1450 | Gujarat | Narmada |
| 5. | Bhakra Nangal Dam | 1325 | Punjab | Sutlej |
| 6. | Koyna Dam | 1960 | Maharashtra | Koyna |
| 7. | Mettur Dam | 120 | Tamilnadu | Kaveri |
| 8. | Idukki Dam | 780 | Kerala | Periyar |
Three Gorges Dam in China:
This dam is the largest hydroelectricity project in the world. Its construction started in 1994 and ended in 2012. The installed capacity of the dam is \(22,500MW\).
This dam is the largest hydroelectricity project in the world. Its construction started in 1994 and ended in 2012. The installed capacity of the dam is \(22,500MW\).
Three gorges dam
S.No. | Name of the power project | Country | River | Installed Capacity in MW |
| 1. | Three gorges Dam | China | Yangtze | 22,500 |
| 2. | Itaipu Dam | Brazil and Paraguay | Parana | 14,000 |
| 3. | Xiluodu Dam | China | Jinsha | 13,860 |
| 4. | Guri Dam | Venezuela | Caroni | 10,235 |
| 5. | Tucurui Dam | Brazil | Tocantins | 8,370 |
Tehri Dam in Uttarakhand is the highest dam in India.
Hirakud Dam in Odisha is the longest dam in India.
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