Question

The main purpose of constructing water harvesting structures is to A hold rainwater on the surface of the earth B. use water for irrigation C. use water for fish farming D. recharge the ground water​

Answer 1

Answer:

B. use water for irrigation

Explanation:

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The main purpose of the rainwater harvesting is to use the locally available rainwater to meet water requirements throughout the year without the need of huge capital expenditure. This would facilitate the availability of uncontaminated water for domestic, industrial, and irrigation needs.

Answer 2

Answer:

The main purpose of constructing water harvesting structures is to use water for irrigation.

Therefore, the option (B) is correct.

Explanation:

The rainwater harvesting system or structures is one of the best way to  support the conservation of water. Rainwater is pure and of good quality, can be used for irrigation, cooking, washing, bathing, cleaning and also for other livestock requirements.

• Rainwater stored in  water harvesting system is an excellent source of water for irrigation with no chemicals, salts and free from all minerals.
• Rainwater harvesting reduces soil erosion, flooding,  storm water runoff and pollution of surface water with fertilizers, pesticides, metals etc.
• Rainwater does not need any filtration system for landscape irrigation.
• Rainwater harvesting reduces the demand for water and for imported water.
• Rainwater harvesting improves the quality and quantity of groundwater.
• Rainwater harvesting inspires and promotes both water and energy conservation.

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