What is rainwater harvesting? Analyze the economic and social values of rainwater harvesting. Write an essay on hydropower in India
Answers
Question 1:
What is rainwater harvesting?
Answer:
1. Rainwater harvesting is the simple process, technique or technology used to conserve rainwater by collecting, storing, conveying and purifying it.
2. This technique is practiced to store water, purify it so that it can be used for future use.
3. Rainwater Harvesting is practiced in such areas where calamities like drought is prone to that place.
Question 2:
Analyze the economic and social values of rainwater harvesting.
Answer:
The economic and social values of rainwater harvesting are as follows-
1. It is a low cost and eco-friendly technique for preserving every drop of water by guiding the rain water to bore well, pits and wells.
2. Rainwater harvesting increases water availability and checks the declining ground water table.
3. Improves the quality of groundwater through dilution of contaminants like fluoride and nitrates.\
Question 3:
Write an essay on hydro-power in India.
Answer:
Hydro electric power plays a major role in the field of power development in the country. Its present contribution to the total electricity generation is about 25 per cent. Hydro electricity power is a renewable natural resource.
1. The generation of electricity by using the force of falling water is called hydro-electricity.
2. Water is a renewable resource and can be used year after year. Thus, making hydel power cheaper to produce than thermal or nuclear power.
3. Water from storage reservoirs is sent through pipes along a steep gradient to rotate the turbines, which convert this energy into electricity. This process is very clean and does not cause pollution of any kind.
4. The water used for generating hydro-electricity is not consumed or contaminated in any way and is still available and suitable for use. It may be used for irrigation, industries or domestic purposes.
5. After the initial cost of constructing dams, power stations and transmission lines, the production of hydro-electricity is inexpensive since there is no consumption of fuel as in thermal power stations.
6. In most cases in India, the production of hydro-electricity is linked with irrigation, flood control, navigation and therefore the cost of hydel power production is lower.
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