Question

Q 13. What is the main objective of water harvesting techniques? Name &
ancient water harvesting structures used in India. Mention 3 causes for failure
to sustain water availability under ground? ​

Answer 1

Answer: hope it helps

1. To meet the increasing demand of water.

2. To reduce the run-off which chokes the drains.

3. To avoid the flooding of roads.

4. To raise the underground water table.

5. To reduce groundwater pollution.

6. To reduce soils erosion.

7. Supplement domestic water needs.

Answer 2

Answer:

The main objectives of rainwater harvesting are

It means capturing rainwhere it falls or capturing the runoff in your own village or town. And taking measures to keep that water clean by not allowing polluting activities to take place in the catchment. Reducing loss of water by its running –off.

Examples of traditional rainwatersystems in India include bamboo pipes and Apatani systems of eastern Himalayas, Ghul of western Himalayas, Zabo and Cheo-ozihi of north easternIndia, Dongs, Garh and Dara of Brahmaputra valley, Kund, Khadin, Talabs, Beri, Johad, Baoli etc

Loss of vegetation cover.

Diversion for high water demanding crops.

Pollution from industrial effluents.

Dumping of urban waste.