What is the Rain water harvesting System

Rainwater harvesting / collection System

It has been increasingly imperative for housing project to incorporate rainwaterharvesting system in regions both rural and urban of known potable water scarcity. This is a step towards ensuring availability through traditional methods of water tapping, in a modern way.

Need for Rooftop Rain Water Harvesting

The Central Ground Water Board has made an assessment of 215 billion cubic metre surplus monsoon run off water that could be stored on surface or in subsurface aquifers through various methods, which otherwise goes as waste. Roof top rain water harvesting structures have to be implemented all over the state/ country: -

1. To meet the ever increasing demand for water.
2. To reduce the runoff, due to which storm drains choke.
3. To avoid flooding of roads.
4. To augment the ground water storage and control decline of water levels.
5. To reduce ground water pollution.
6. To improve the quality of ground water.
7. To reduce the soil erosion.
8. To supplement domestic water requirement during summer, drought etc.

Roof Top Water Collection and Recharge

Availability of rain water from roof tops is so high in the urban areas that if it is properly diverted and used, it helps in reducing the water scarcity problem of cities and towns. Commonly runoff water from roof tops are let off into the drains. Instead of this, the outlets can be connected through a pipe to a storage tank and over flow of this tank may be diverted and let into gravel filled trenches, pits or existing open wells/ bore wells etc., to serve as recharge points. This method is less expensive and very effective and if implemented in good spirit by each house/housing society, will help in augmenting the groundwater availability of the area. Different structures can be adopted for storage, utilizing the roof top water.