Rain Water Harvesting - EVS Project

RAIN WATER HARVESTING


INTRODUCTION


Rain Water Harvesting is a way to capture the rain water when it rains, store that water above ground or charge the underground and use it later. This happens naturally in open rural areas. But in congested, over-paved metropolitan cities, we need to create methods to capture the rain water.


ADVANTAGES OF RAIN WATER HARVESTING IN URBAN AREAS
Rainwater harvesting in urban areas can have manifold reasons. To provide supplemental water for the city's requirement,it increase soil moisture levels for urban greenery, to increase the ground water table through artificial recharge, to mitigate urban flooding and to improve the quality of groundwater are some of the reasons why rainwater harvesting can be adopted in cities. In urban areas of the developed world, at a household level, harvested rainwater can be used for flushing toilets and washing laundry. Indeed in hard water areas it is superior to mains water for this. It can also be used for showering or bathing. It may require treatment prior to use for drinking
TYPES OF RAIN WATER SYSTEMS
The types of rain water systems can be broadly divided into two types:-
1. DOMESTIC RAIN WATER SYSTEM- there are two types of domestic rain water systems:-
i. DIY domestic system
ii. Commercial domestic systems

INDUSTRIAL RAIN WATER SYSTEMS- Rainwater may also be used for groundwater recharge, where the runoff on the ground is collected and allowed to be absorbed, adding to the groundwater.
Rainwater harvesting system

METHODS OF RAIN WATER HARVESTING
Traditional Methods
1. Kunds of Thar Desert
2. Kul Irrigation Method
3. Bamboo Method
4. Temple Tanks of India

Modern Methods
1. Absorption Pit Method
2. Absorption Well Method
3. Well cum Bore Method
4. Recharge trench cum injection well


CONCLUSION
Thus rain water harvesting is of immense importance especially in those places which are facing the problem of scarcity of water. It is a way to use the rain water effectively which usually gets drained away and wasted. It has been made mandatory in some states in India and has a bright prospect in our country in years to come.