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RAIN-WATER
HARVESTING
PRINCIPLES & METHODSPRINCIPLES & METHODS
Made By : MEHUL HOTWANI
B.ARCH.-2nd YEAR(3rd SEM.)B.ARCH.-2 YEAR(3 SEM.)
RAIN WATER HARVESTING
Rain water harvesting is a
technology used fortechnology used for
collecting and storing rain
water from roof tops, the
land surface or rock
catchments using simple
techniques such as jars &
pots as well as more
complex techniques such as
underground check tanks.
Rain water harvesting is
the accumulation and
deposition of rain water for
reuse on-site, rather than
allowing it to run-off.
Uses of Rain Water
Recharge underground waterRecharge underground water
Gardening
Livestock
Drinking purpose
For irrigation purpose, etc.
ADVANTAGES
Conserve & supplement existing water
resources.
Available for capture and storage inAvailable for capture and storage in
most global locations.
Potentially provide improved quality of
water.
Supply water at one of the lowest costs
possible for a supplemental supply
source.
Capturing and directing storm water
(runoff) & beneficially use it.
Commitment as a corporate citizen-Commitment as a corporate citizen-
showcasing environmental concerns.
Public mandate(India).
Replenishing local ground water,
aquifers where lowering of water tables
has occured.
How can we harvest Rainwater
Broadly there are two ways
of rainwater harvesting-
 Surface runoff
harvesting
 Roof top rainwater
harvesting
In urban area
Surface Run-off Harvesting
In urban area
rainwater flows away
as surface runoff.
This runoff could be
caught and used for
recharging aquifiers
by adopting
appropriateappropriate
methods.
Roof top Rainwater Harvesting
It 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. This methodhouse/building. This method
is less expansive and very
effective.
Components of the roof top
rainwater harvesting systemrainwater harvesting system
 Catchment area
 Transportation
 First flush
 Storage system
 Delivery system Delivery system
 Filtration system
Recharging ground water aquifers
Commonly used recharging
methods are-
Recharging of bore wells
Recharging of dug wells
Recharge pits
Recharge trenches
Percolation tanks
Principles of RWH
System of rainwater
harvesting is helpful forharvesting is helpful for
achieving the following-
 25% portable water
reduction
 100% portable water
provided by rain
50% reduction of sewer 50% reduction of sewer
quantities
‘LIFE DEPENDS ON WATER AND WATER
DEPENDS ON YOU SO SAVE WATER ANDDEPENDS ON YOU SO SAVE WATER AND
DON’T LET IT TO DRAIN’
THANK-YOUTHANK-YOU

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RAIN WATER HARVESTING

  • 1. RAIN-WATER HARVESTING PRINCIPLES & METHODSPRINCIPLES & METHODS Made By : MEHUL HOTWANI B.ARCH.-2nd YEAR(3rd SEM.)B.ARCH.-2 YEAR(3 SEM.)
  • 2. RAIN WATER HARVESTING Rain water harvesting is a technology used fortechnology used for collecting and storing rain water from roof tops, the land surface or rock catchments using simple techniques such as jars & pots as well as more complex techniques such as underground check tanks. Rain water harvesting is the accumulation and deposition of rain water for reuse on-site, rather than allowing it to run-off.
  • 3. Uses of Rain Water Recharge underground waterRecharge underground water Gardening Livestock Drinking purpose For irrigation purpose, etc.
  • 4. ADVANTAGES Conserve & supplement existing water resources. Available for capture and storage inAvailable for capture and storage in most global locations. Potentially provide improved quality of water. Supply water at one of the lowest costs possible for a supplemental supply source. Capturing and directing storm water (runoff) & beneficially use it. Commitment as a corporate citizen-Commitment as a corporate citizen- showcasing environmental concerns. Public mandate(India). Replenishing local ground water, aquifers where lowering of water tables has occured.
  • 5. How can we harvest Rainwater Broadly there are two ways of rainwater harvesting-  Surface runoff harvesting  Roof top rainwater harvesting
  • 6. In urban area Surface Run-off Harvesting In urban area rainwater flows away as surface runoff. This runoff could be caught and used for recharging aquifiers by adopting appropriateappropriate methods.
  • 7. Roof top Rainwater Harvesting It 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. This methodhouse/building. This method is less expansive and very effective.
  • 8. Components of the roof top rainwater harvesting systemrainwater harvesting system  Catchment area  Transportation  First flush  Storage system  Delivery system Delivery system  Filtration system
  • 9. Recharging ground water aquifers Commonly used recharging methods are- Recharging of bore wells Recharging of dug wells Recharge pits Recharge trenches Percolation tanks
  • 10. Principles of RWH System of rainwater harvesting is helpful forharvesting is helpful for achieving the following-  25% portable water reduction  100% portable water provided by rain 50% reduction of sewer 50% reduction of sewer quantities
  • 11. ‘LIFE DEPENDS ON WATER AND WATER DEPENDS ON YOU SO SAVE WATER ANDDEPENDS ON YOU SO SAVE WATER AND DON’T LET IT TO DRAIN’ THANK-YOUTHANK-YOU