09-04-2012, 12:39 PM
RAIN WATER HARVESTING
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What is RAIN WATER HARVESTING
RWH is simply collecting, staring and purifying the naturally soft and pure rainfall that falls upon your roof.
Rain water may be utilized for both potable and non-potable requirements such as…..
-drinking,cooking,bathing(potable quality)
-swimming pool replenishment.
-toilet flushing.
-laundry(reduces detergent and bleach)
-landscape irrigation.
-livestock and animals.
How to Harvest Rain
The six basic components of a RWH include:
Catchment: roof surface to collect rain.
Conveyance: channels or pipes from roof or catchment area to storage.
Roof washing: ‘first flush’ diverter system to filter and remove contaminants.
Storage: cisterns or tanks where collected rainwater is securely stored.
Purification : includes filtration ,ozone or UV light to purify the collected rainwater for portable use.
Distribution : system that delivers the rainwater; usually including a small pump and preserve tank.
Quality of Rainwater Harvested
Quality of Rainwater Harvested
- As the primary source of water, rainwater is the purest form of water. Rainwater harvesting not only solves the problem of availability of water, but also provides good quality water.
Low Cost Domestic RWH Systems
Main 3 components for low cost RWH systems are……
1)Collecting surface/area- It’s the area from which the rainwater is to be collected. Eg: roofs.
2)Transporting systems- It is the method of transportation of rainwater from collecting surface to storage facility. EgVC drainpipes.
3)Storage facility- it is the PVC storage tanks used to store the harvested rain water.
In this system the water is not filtered so this harvested water can only be used in non drinking purposes like; watering the plants etc.
ADVANTAGES OF RWH
Provides self sufficiency to your water supply.
Reduces the cost for pumping of ground water.
Provides high quality water, soft and low in minerals.
Improves the quality of ground water through dilution when recharged to ground water.
Conclusion
Our Mission Should Be:
-Conservation of water.
-since we cannot produce energy we can save it by
preventing wastage.
-In the same way we cannot produce water but save it
and protect our future.
Reduces soil erosion in urban areas.
The roof-top rain water harvesting is less expensive.
RWH systems are simple which can be adopted by individuals.
Rooftop RWH are easy to construct, operate, and maintain.
In hilly terrains, RWH is preferred.
In islands, due to limited extent of fresh water aquifers, rain water harvesting is the most preferred source of water for domestic use.
In deserts ,where rainfall is low,RWH is providing relief to the people.