2. "Today in Rajasthan, the practise of rooftop rainwater water harvesting popularity has declined" .
Do you agree ? give reason .
Answers
Answer
Rainwater harvesting (English: water harvesting) is the process of collecting or collecting rainwater from a particular medium. Shortage of drinking water is becoming a crisis around the world. The reason for this is that the water level of the earth is constantly going down. For this, the surplus monsoon runoff that flows into the ocean needs to be harvested and recharged so that ground water resources can be augmented. In India alone, the estimate of viable groundwater storage is 216 billion cubic meters. (BCM) from which 170 BCM can be recovered. [1] One solution to this problem is water harvesting. Water harvesting system is being adopted globally as an alternative to the availability of drinking water of animals, irrigation of crops. The water harvesting system is suitable for places where there is a minimum of 200 mm of rainfall per year. The cost of this system when building a new house in 400 square units comes from about twelve to fifteen hundred rupees only. [2]
Use
Water harvesting involves collecting rain from the roofs of the house, roofs of local offices or even a specially constructed area. Two types of pits are made in it. A pit in which water is stored for daily use and another is used in irrigation work. For daily use, pucca pits are constructed with cement and brick and its depth is seven to ten feet and length and width is about four feet. These pits are connected to roof drains and basins by drains and pipes (pipes), so that rainwater can reach these pits and other pits are kept as such (raw). The fields are irrigated with its water. Water collected from the roof of houses can be used immediately. There are some areas in the world, such as New Zealand, where people depend on the water harvesting system. People there collect water from the roof of their houses when it rains.
Storage methods
Harvesting in India
In India, people collect water through water harvesting in mixed aquatic areas, such as the Thar Desert region of Rajasthan. The roof-overhead water harvesting technique has been adopted here. Rainwater harvesting is a simple and inexpensive technique that has been practiced in the desert for thousands of years. For the last two and a half decades, Barefoot College has been providing drinking water to more than 30 million people by collecting rainwater, collected in underground tanks, in the schools and schools of fifteen-sixteen states, on the roofs of the school. The college is expanding this technology not only as an alternative but as a permanent solution. [4] This structure serves two purposes: -
Provision of water throughout the year to improve drinking water sources, especially four to five months of dry season
Thus local techniques, especially in zonal areas, are getting direct benefits from various sections of society in many ways.
References
External linkage of water from rooftops (India Water Portal) Advisory Council on Artificial Recharge, Government of India