Khadins, Ahars and Katta’s are ancient structures that are examples of water harvesting.
(A) True
(B) False

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Hint: Water harvesting is the assortment and capacity of downpour, as opposed to permitting it to run off. Water is gathered from a rooftop like surface and diverted to a tank, storage, profound pit, spring, or a supply with permeation.

Complete answer: In India, water harvesting is an age-old notion. Some of the water harvestings including water conveyance status are ‘chadians’ in Rajasthan, ‘perhaps’ in Bihar and ‘kasha’ in the swastika.
a) Khadins - Khadins are indigenous constructions built to collect surface runoff water for agriculture. A long earthen embankment that is constructed across the hill slopes of gravelly uplands is the main characteristic of a khadin, also known as ‘dhora’. Slices and spillways allow the excess water to drain off and then the water-saturated land is used for crop production.
b) Ahars - These are conventional flow water harvesting systems. These are reservoirs constructed at the end of irrigation channels with embankments on three sides.
c) Kattas - It involves temporary control dams built across streams. Every year, these conventional structures are designed to preserve water for summer irrigation. It was constructed using kacha stones and wood that are locally available.
Hence, the correct answer is option A.

Note: Rainwater harvesting in urban areas decreases the effect of runoff and flooding with regard to urban agriculture. It used to provide water for drinking in China and Brazil. It also reduces soil erosion, controls flood and increases the demand for the use of groundwater.