Geography [3 Mark Question Answer]

Wells are an independent source of irrigation. It may be used as and when the necessity arises.
(i) Wells are simplest and cheapest source of irrigation, can be dug at any convenient place.
(ii) Inundation canals are ‘flood-water’ canals and have water in them only when the river is flooded during the rainy season.

Several methods are used for lifting the water. The prevailing methods are the Persian Wheel, Mhote and the Picotin.
The Persian Wheel: It is also known as ‘Rehat’ and is worked by bullocks, buffaloes or camels.
Mhote: It is also worked by bullocks, moving up a sloping ramp to pull up a big leather bucket.
Picotin: In this device a vertical pole is employed for balancing the bucket and the equivalent load fixed on either ends. It is also known as ‘Dhenkuli’.

Conservation of water resources has become essential due to:
(i) The increase in population with the progress of time results in water scarcity.
(ii) Our water resources like the river, lakes etc., are polluted and their water can hardly used without adequate treatment.
(iii) The water demand for industrial use will increase day by day.