EVERYDAY SCIENCE

Detailed explanation-1: -It reduces soil erosion and flood hazards by collecting rainwater and reducing the flow of stormwater to prevent urban flooding. Most buildings that utilize rainwater harvesting systems have a built-in catchment area on top of the roof, which has a capacity of collecting large volumes of water in case of rainstorms.

Detailed explanation-2: -The use of rainwater harvesting systems allows groundwater levels to recharge, which in turn aids in enhancing urban greenery. Rainwater harvesting systems are simple to set up and operate. There is no requirement of complicated purifying systems which need to be applied to cleanse groundwater, since rainwater is pure.

Detailed explanation-3: -In areas where the surface soil is impervious and large quantities of roof water or surface runoff is available within a very short period of heavy rainfall, the use of trench/ pits is made to store the water in a filter media and subsequently recharge to ground water through specially constructed recharge wells.

Detailed explanation-4: -Plant root increases the extent of percolation of water to groundwater. So by planting more and more trees, we can make more rainwater to percolate and reach the water underground. Was this answer helpful?

Detailed explanation-5: -Feature of the catchment of the water. Impact on the environment as well. Storage tanks capacity. Technology availability. Runoff quantum. 08-Jul-2021