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Rain Water Harvesting
Indian Homes
• History
• Concept
• Current Situation
• Residential
• Commercial
• Retail
• Hospitality
• Rain catchers
• Evangelists
Contents
History
• Rainwater harvesting is an ancient
practice of catching and holding rain
for later use.
• In a rainwater harvesting system, rain
is gathered from a building rooftop or
other source and is held in large
containers for future use, such as
watering gardens or washing cars.
• This practice reduces the demand on
water resources and is excellent
during times of drought,
• The other methods of ‘catching the
rain includes using the land surface or
rock catchments
Current situation – Residential
• 250 million urban dwellers in India
• By 2020, half of India will be in cities with a significant
population in apartments
• Current issues facing the Indian citizens
• Inadequate levels of service
• Increasing demand-supply gap
• Poor sanitary conditions
• Deteriorating financial and technical performance of the water
supply boards
• 88 per cent of urban population has access to a potable
water supply
Current situation – Commercial
• Transmission and distribution networks are old and
poorly maintained
• Physical losses range from 25% to over 50%.
• Low pressures and intermittent supplies allow back
siphoning, which results in contamination of water in
the distribution network
• Water is typically available for only 2-8 hours a day in
most Indian cities.
• The situation is even worse in summer when water is
available only for a few minutes
Current situation – Retail (Bangalore)
• Fifth largest city in the country
• Average annual rainfall: 859 mm
• Primary rainy season: June - September (South-West Monsoon)
• Secondary rainy season: November - December (North-East
Monsoon)
• To meet the demand supply gap, the government has
already proposed to extract 770.0 MLD of water from the
Cauvery River under Cauvery stage IV project
• The production cost of this water per kiloliter is expected to be
INR. 45.70.
• The demand supply gap is met by groundwater
exploitation. It is estimated that 40% of the population of
Bangalore, is dependent on groundwater
Current situation – Hospitality
(Better Initiatives)
• Environment-friendly and useful reserve of water in
scarcity seasons
• On rooftops of hotels and hospitals, the stored rain
water can be used instead of the regular water supply
from municipality etc., thereby saving municipality
water.
• Increases ground water level and aids in irrigation
• Helps in eradicating many water borne diseases
• Siraj Hussain – Vice Chancellor, Jamia
Hamdard University; Delhi
• Total roof top and surface area – 3.15 lakh
sq.m.
• Water harvested – 6.74 crores liters annually
• Terrain – Hard rock
• Method – Ground Water recharging
• Atul Bhalla – Arts Teacher, Mira Model
School; Delhi
• Total roof top and surface area – 16200 sq.m.
• Water harvested – 44.54 lakh liters annually
• Terrain – Sedimentary
• Method – Ground Water recharging.
Rain Catchers
• Dr. Krishan Saighal – Former President,
Panchsheel Club; Delhi
• Total roof top and surface area – 3.57 lakh
sq.m.
• Water harvested – 17.45 crores liters
annually
• Terrain – Hard rock
• Method – Ground Water recharging.
• Hero Honda Motorcycle manufacturing
unit – Dharuhera, Haryana
• Total roof top and surface area – 11080 sq.m.
• Water harvested – 54.41 lakhs liters annually
• Terrain – Sedimentary
• Method – Ground Water recharging
Rain Catchers
For further details you can contact
+91 900 8111 099

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Rain water harvesting in homes

  • 2. • History • Concept • Current Situation • Residential • Commercial • Retail • Hospitality • Rain catchers • Evangelists Contents
  • 3. History • Rainwater harvesting is an ancient practice of catching and holding rain for later use. • In a rainwater harvesting system, rain is gathered from a building rooftop or other source and is held in large containers for future use, such as watering gardens or washing cars. • This practice reduces the demand on water resources and is excellent during times of drought, • The other methods of ‘catching the rain includes using the land surface or rock catchments
  • 4. Current situation – Residential • 250 million urban dwellers in India • By 2020, half of India will be in cities with a significant population in apartments • Current issues facing the Indian citizens • Inadequate levels of service • Increasing demand-supply gap • Poor sanitary conditions • Deteriorating financial and technical performance of the water supply boards • 88 per cent of urban population has access to a potable water supply
  • 5. Current situation – Commercial • Transmission and distribution networks are old and poorly maintained • Physical losses range from 25% to over 50%. • Low pressures and intermittent supplies allow back siphoning, which results in contamination of water in the distribution network • Water is typically available for only 2-8 hours a day in most Indian cities. • The situation is even worse in summer when water is available only for a few minutes
  • 6. Current situation – Retail (Bangalore) • Fifth largest city in the country • Average annual rainfall: 859 mm • Primary rainy season: June - September (South-West Monsoon) • Secondary rainy season: November - December (North-East Monsoon) • To meet the demand supply gap, the government has already proposed to extract 770.0 MLD of water from the Cauvery River under Cauvery stage IV project • The production cost of this water per kiloliter is expected to be INR. 45.70. • The demand supply gap is met by groundwater exploitation. It is estimated that 40% of the population of Bangalore, is dependent on groundwater
  • 7. Current situation – Hospitality (Better Initiatives) • Environment-friendly and useful reserve of water in scarcity seasons • On rooftops of hotels and hospitals, the stored rain water can be used instead of the regular water supply from municipality etc., thereby saving municipality water. • Increases ground water level and aids in irrigation • Helps in eradicating many water borne diseases
  • 8. • Siraj Hussain – Vice Chancellor, Jamia Hamdard University; Delhi • Total roof top and surface area – 3.15 lakh sq.m. • Water harvested – 6.74 crores liters annually • Terrain – Hard rock • Method – Ground Water recharging • Atul Bhalla – Arts Teacher, Mira Model School; Delhi • Total roof top and surface area – 16200 sq.m. • Water harvested – 44.54 lakh liters annually • Terrain – Sedimentary • Method – Ground Water recharging. Rain Catchers
  • 9. • Dr. Krishan Saighal – Former President, Panchsheel Club; Delhi • Total roof top and surface area – 3.57 lakh sq.m. • Water harvested – 17.45 crores liters annually • Terrain – Hard rock • Method – Ground Water recharging. • Hero Honda Motorcycle manufacturing unit – Dharuhera, Haryana • Total roof top and surface area – 11080 sq.m. • Water harvested – 54.41 lakhs liters annually • Terrain – Sedimentary • Method – Ground Water recharging Rain Catchers
  • 10. For further details you can contact +91 900 8111 099