What is water harvesting? How can this technique help in the conservation of water?

Hint:Rainwater harvesting can also reduce floods in some regions. Rainwater recycling would not only help people conserve on their water bills, but will cut expenses for cities as a whole.

Complete Answer:
Water is a fundamental requirement for all aspects of life on earth. Conservation of water is very important since it is essential for all biological activities.
Water harvesting is an age-old idea in India and has been performed in India for years. It is a recycling method in which rainwater is collected as it rains and steps are taken to clean it up. Rainwater harvesting is the gathering and storing of rain, rather than allowing it to drain dry. Rainwater is gathered from a roof-like surface and diverted to a pool, cistern, deep lake, and aquifer or percolate reservoir. Dew and fog may also be gathered using nets or other instruments.
Water harvesting tends to save water when there is a lack of rain or a shortage of electricity so it can be applied at the time. It also recharges groundwater and decreases reliance on rainfall for irrigation purposes. There are also benefits of the water contained in the ground. It does not evaporate, but stretches out to recharge wells and provides plants with moisture over a large area. Furthermore, it does not have spawning areas for mosquitoes such as polluted water found in wetlands or artificial lakes. Groundwater is therefore reasonably safe from pollution from human and animal waste.

Note:Rainwater harvesting is a method of accumulating and storing rainwater for on-site use rather than allowing it to wash off. Rainwater has an autonomous and unrestricted water supply that offers a variety of ways the water can be used.