Rainwater harvesting

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What is rainwater harvesting:

Rainwater harvesting means capturing rain where it falls or capturing the run off in your own village or town. And taking measures to keep that water clean by not allowing polluting activities to take place in the catchment

Rainwater harvesting is a process involving collection and storage of rain water that runs off natural or man-made catchment areas e.g. roof top, compounds, rock surface or hill slopes or artificially repaired impervious/semi-pervious land surface.

Rainwater harvesting, apart from recharging the ground water level, increases the availability of water at a given place at a given point of time.

Rain water harvesting – a simple, economical and ecofriendly method of water conservation is an ideal solution to recharge the ground water

The rainwater that falls on the surface/ roof top is guided to borewells or pits or new/ old/ abandoned wells through small diameter pipes to recharge the underground water which can be used later whenever required.

Why Harvest Rainwater:

• To  Save energy
• To Reduce water logging
• To stop salinity ingression
• To save ground water storage
• To Surface water is inadequate to meet our demand and we have to depend on ground water.Due to rapid urbanization, infiltration of rain water into the sub-soil has decreased drastically and recharging of ground water has diminished.

How to harvest Rainwater:

Roof top rainwater harvesting (RTRWH):

Rooftop is a system of catching rainwater where it falls. In rooftop harvesting, the roof becomes the catchments, and the rainwater is collected from the roof of the house/building. It can either be stored in a tank or diverted to artificial recharge system. This method is less expensive and very effective and if implemented properly helps in augmenting the ground water level of the area

Catchments

The catchment of a water harvesting system is the surface which directly receives the rainfall and  provides water to the system. It can be a paved area like a terrace or courtyard of a building, or an unpaved area like a lawn or open ground.