Tank irrigation is more practiced in South India as compared to other forms of irrigation like...........

Geography Irrigation

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Tank irrigation is more practiced in South India as compared to other forms of irrigation like canal and wells. Why?

1. It is difficult to dig canals and wells due to undulating relief and hard rock structure.

2. Low percolation of rain water due to hard rock structure

3. Many rivers of South India are seasonal in nature.

4. Population and agricultural fields are scattered which makes canal irrigation economically unviable.

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1,2 and 3 only

2, 3 and 4 only

1, 2 and 4 only

All of the above

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Explanation:

Tank is an artificial reservoir. Tank use is critical in parts of South India without perennial rainfall where water supply replenishment is dependent on monsoon seasons.
Most of the rivers of this region are seasonal and dry up in summer season. Therefore, they cannot supply water to canals throughout the year.
There are several streams which become torrential during rainy season. The only way to make best use of this water is to impound it by constructing bunds and building tanks. Otherwise this water would go waste to the sea.
Most of the tanks are natural and do not involve heavy cost for their construction. Even an individual farmer can have his own tank. Tanks are generally constructed on rocky bed and have longer life span. In many tanks, fishing is also carried on. This supplements both the food resources and income of the farmer.