How to harvest Rainwater ?
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Harvesting rain water is very simple. When it rains we have to
collect this water and not to allow it to run away. There are various
techniques to do it. Broadly, rain water can be harvested
for two purposes.
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1. Stored for ready use in containers above ground or below ground.
2. Charged into the ground for withdrawal later (ground water recharging).
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As indicated above rain water falling on the terrace can be collected
through pipelines/drains and stored in a storage tank for direct
use or diverted into a well for ground water recharge. Rain fall
over the open spaces around the building may also be diverted for
recharge purpose. The details of various RWH techniques are described
in the Chapter "Different methods of Rainwater Harvesting".
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1. What is Roof Top Harvesting?
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To collect and store the rainwater which falls on the terrace
of the buildings/houses.The water collected from the terrace is
of good quality and it can be stored in tanks/sumps either for direct
use or can be diverted to the existing bore well/open well for ground
water recharge and storage.
The terrace of the building should be maintained clean. A grill/mesh
has to be fixed at the entrance of the rain water pipe in the terrace
to arrest large particles such as papers, leaves, etc. A filter
chamber has to be provided to filter small/minute dust particles
before diverting the rain water into the storage tank or open well/bore
well.
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2. How to harvest rain water in the open
spaces?
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Rain water collected in the open spaces, being relatively dirty
in nature, cannot be used for direct recharge of the well and therefore
used for ground water recharge, using appropriate recharge methods/structures.
In the absence of open well, the roof-top water may also be harvested
along with open space water.A dwarf wall of (7.5 cm height) has
to be constructed at the entrance/gate to avoid run off into the
street/road. If man holes are present (sewerage/waste water line)
the height of which has to be raised a little to avoid draining
of rain water through the manholes.
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3. What is Roof Top Harvesting?
|
|
|
To collect and store the rainwater which falls on the terrace
of the buildings/houses.The water collected from the terrace is
of good quality and it can be stored in tanks/sumps either for direct
use or can be diverted to the existing bore well/open well for ground
water recharge and storage.
The terrace of the building should be maintained clean. A grill/mesh
has to be fixed at the entrance of the rain water pipe in the terrace
to arrest large particles such as papers, leaves, etc. A filter
chamber has to be provided to filter small/minute dust particles
before diverting the rain water into the storage tank or open well/bore
well.
|
4. How to harvest rain water in the open
spaces?
|
|
|
Rain water collected in the open spaces, being relatively dirty
in nature, cannot be used for direct recharge of the well and therefore
used for ground water recharge, using appropriate recharge methods/structures.
In the absence of open well, the roof-top water may also be harvested
along with open space water.A dwarf wall of (7.5 cm height) has
to be constructed at the entrance/gate to avoid run off into the
street/road. If man holes are present (sewerage/waste water line)
the height of which has to be raised a little to avoid draining
of rain water through the manholes.
|
5. How to harvest rain water in the open
spaces?
|
|
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| Rain water collected in the open spaces, being relatively dirty
in nature, cannot be used for direct recharge of the well and therefore
used for ground water recharge, using appropriate recharge methods/structures.
In the absence of open well, the roof-top water may also be harvested
along with open space water.A dwarf wall of (7.5 cm height) has
to be constructed at the entrance/gate to avoid run off into the
street/road. If man holes are present (sewerage/waste water line)
the height of which has to be raised a little to avoid draining
of rain water through the manholes. |
