Discuss how rainwater harvesting in semi-arid regions of rajasthan is carried out

The answer is given as follows, • In Rajasthan, to store drinking water, ‘Rooftop rainwater harvesting’ was commonly practised. • Rain fed storage structures were created in agricultural fields. It allowed water to stand thereby moistening the soil – Johads in different parts of Rajasthan, and Khadins in Jaisalmer. • For storing drinking water, all the houses had tankas or underground tanks in Balmer, Phalodi, Bikaner regions of Rajasthan. • The size of tankas would be as large as a big room. • The Rooftop rainwater harvesting system had tankas which were built inside the courtyard or main house. • Through a pipe they were connected to the sloping roofs of the house. • These underground tankas are used to store rainwater, which falls on the roof and flows down through pipes. • Due to the perennial Rajasthan Canal, rooftop rainwater harvesting is on decline.

Rainwater harvesting is a technique of increasing the recharge of groundwater by capturing and storing rainwater. Many low cost techniques are used in semi-arid areas like Rajasthan in Bikaner, Phalodi and Barmer, underground tanks or tankas are used for storing drinking water. They are connected to the sloping roofs of the houses through a pipe. Rainwater is stored in the tankas for three to five years. Rainwater or Palar Pani is considered the purest form of fresh water.

Hint: Rainwater harvesting is that the collection and storage of rain, instead of allowing it to escape. Rainwater is collected from roofs of houses and redirected to a tank. Complete answer: Rain water harvesting in semi-arid regions of Rajasthan is administered within the following ways:- (i) In Rajasthan semi-arid regions, every house is having underground tanks to store the water for drinking purposes. (ii) These tanks are large and deep which were built inside most houses or the courtyard. (iii) They were linked to the sloping roofs of the homes through a pipe. Rainwater falling on the rooftops would run down through a pipe and collect within the underground tankas. (iv) The rainwater collected, is stored within the tanks providing beverage till subsequent season . (v) When all other sources have dried up, these tanks were beneficial to fight against the summer heat as they kept the rooms cool. The rainwater or palar pani, as commonly known in these parts, is taken into account the purest sort of natural water. (VI) Paar is a common water harvesting practice in the western Rajasthan region. It is a standard place where the rainwater flows from the agar and within the process percolates into the sandy soil. In order to access the rajani pani which is percolated water, kuis or beris are dug within the agor which is a storage area. Note: In semi arid regions of Rajasthan rainwater harvesting helps utilities reduce peak demands during summer months, saving treated water f...

People in Rajasthan follow rooftop water harvesting to store drinking water. In the arid and semi-arid regions, the agricultural fields are covered in water storage structures which store the rainwater. This allows the soil to be moistened, like we see "khadins" in Jaisalmer and "Johads" in the other parts of Rajasthan. In the semi-arid and arid regions, particularly in Bikaner, Phalodi and Barmer, most of the houses have traditional underground water storage tanks or "tankas" for the storage of drinking water. The size of the tanks differ, they can a big room inside the main house or a storage tank in the courtyard. They are connected to the sloping roofs of the houses through a pipe. The rainwater falls down the pipes and is collected in the underground "tankas". In the western part of the state, the rainwater harvesting has declined due to the construction of the Indira Gandhi Canal. This makes the availability of water in plenty and thus, people refrain from using the rooftop rainwater harvesting technique. 1 Based on the information given below classify each of the situations as 'suffering from water scarcity' or 'not suffering from water scarcity'. (a) Region with high annual rainfall. (b) Region having high annual rainfall and large population. (c) Region having high annual rainfall but water is highly polluted. (d) Region having low rainfall and low population. 1 Which one of the following statements is not an argument in favour of multi-purpose river projects? (a)...