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LATEST NEWS UPDATES | Why flooding raises alarm over bearing of hydropower plants on the Himalayas -Jasleen Bhatti

Why flooding raises alarm over bearing of hydropower plants on the Himalayas -Jasleen Bhatti

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published Published on Jul 29, 2021   modified Modified on Jul 29, 2021

-Down to Earth

The need of the hour is to put halt large hydel-power projects in the Himalayas. Can small hydropower plants offer a sustainable solution?

Hydropower is a renewable and non-polluting source of energy. India has an economically exploitable and viable hydropower potential, which is estimated to be about 84,000 megawatt at 60 per cent load factor. It has an installed capacity of 148,701 MW, according to the National Hydroelectric Power Corp. 

The Central Electricity Authority reported that the country has around 13,000 MW of hydropower plants under construction, with another 8,000 MW slated to start in the next six to eight months. Currently, the installed capacity of hydropower in the country is 45,700 MW.

Small hydel power projects up to 25 MW in India are under the Union Ministry of New and Renewable Energy (MNRE) and large hydel-power projects exceeding 25 MW are under the Union Ministry of Power. The country has set a target of 175 GW of renewable power capacity by 2022, including 5 GW of small hydropower. 

India's hydropower capacity is expected to reach 70 GW by 2030, according to MNRE.

The power ministry in its draft amendment of the Electricity Act has proposed to include hydropower within the renewable purchase obligation targets set for the state power distribution companies.

In India, the western Himalayan states of Jammu & Kashmir, Uttarakhand, and Himachal Pradesh are rich in hydropower potential as they have numerous glaciers and rivers. Hydropower generation in these states increases in summers but decreases in winter (from December to March) because of the freezing of glaciers and lakes.

As water stored in a reservoir falls on a turbine, its kinetic energy is converted to mechanical energy. In turn, the generator converts the mechanical energy of the turbine into electricity.

A hydroelectric plant's turbine is custom-made for maximum efficiency. The generated electricity is then transferred to the communities by way of transmission lines, and the used water is returned to lakes, streams and rivers.

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Down to Earth, 29 July, 2021, https://www.downtoearth.org.in/blog/energy/why-flooding-raises-alarm-over-bearing-of-hydropower-plants-on-the-himalayas-78167?fbclid=IwAR3CcGk6H_lJvA741anXO9zrMkur85RxujSmaLUjvEaSQ3c4SQ32zkAJCtU


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