write a note on the traditional method of rain water harvesting in western Himalaya Bengal and Rajasthan ?
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(a) In hilly and mountainous regions, people built diversion channels like ‘gul’ or ‘kul’ in Western Himalaya for agriculture.
(b) Roof-top rain water harvesting was commonly practised to store drinking water particularly in Rajasthan.
(c) In West Bengal, people develop inundation channels to irrigate their fields.
(d) In semi-arid regions agricultural fields were converted into rain fed storage structures called Khadins and Johads that allowed the water to stand and moist the soil.
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