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Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
Rainwater harvesting - CCRT
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Rainwater harvesting - CCRT

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  • What are the dependencies that affect the timeline, cost, and output of this project?
  • Transcript

    • 1. Rain Water Harvesting
      9.8.2011
      Dr. N. Sai Bhaskar Reddy
      CEO, GEO
      http://e-geo.org
      Centre for Cultural Resources Training
      (Ministry of Culture, Govt. of India), Hyderabad
    • 2.
    • 3. Climate Changes in India
      • Increase in surface temperature by 0.4 degree C over the past century.
      • 4. Warming trend along the west coast, in central India, the interior peninsula, and northeastern India.
      • 5. Cooling trend in northwest India and parts of South India.
      • 6. Regional monsoon variations: increased monsoon seasonal rainfall along the west coast, northern Andhra Pradesh and North-western India, decreased monsoon seasonal rainfall over eastern Madhya Pradesh, North-eastern India, and parts of Gujarat and Kerala.
      3
    • 7. Climate Changes in India
      • Observed trends of multi-decadal periods of more frequent droughts, followed by less severe droughts.
      • 8. Studies have shown a rising trend in the frequency of heavy rain events and decrease in frequency of moderate events over central India from 1951 to 2000.
      • 9. Records of coastal tide gauges in the north Indian ocean for the last 40 years has revealed an estimated sea level rise between 1.06-1.75 mm per year.
      • 10. The available monitoring data on Himalayan glaciers indicates recession of some glaciers.
      4
    • 11. Per-capita Carbon –dioxide emission (Metric Tons)
    • 12.
    • 13.
    • 14. WASTED WATER
      The Barefoot College, Tilonia
    • 15. STRUGGLE FOR WATER
      The Barefoot College, Tilonia
    • 16. POLLUTED WATER
      The Barefoot College, Tilonia
    • 17. The Barefoot College, Tilonia
    • 18. Roof top rainwater harvesting
      At AVANI, Berinag, Uttarakhand
    • 19. RECHARGE WELLS
      While it would normally take between 20-30 years for water to percolate 100 feet from an open tank, it has been noticed in an open well 300,000 litres can percolate to the same depth within a week.
      The Barefoot College, Tilonia
    • 20. Every drop counts
    • 21. INDIA’S LAND RESOURCE, IRRIGATION AND FOOD PRODUCTION
      • India has 2% of world’s land, 4% of freshwater, 16% of population, and 10% of its cattle.
      • 22. Geographical area = 329 Mha of which 47% (142 Mha) is cultivated, 23% forested, 7% under non-agri use, 23% waste.
      • 23. Per capita availability of land 50 years ago was 0.9 ha, could be only 0. 14 ha in 2050.
      uk-energy-saving.com
    • 24. Out of cultivated area, 37% is irrigated which produces 55% food; 63% is rain-fed producing 45% of 200 M t of food.
      In 50 years (ultimate), proportion could be 50:50 producing 75:25 of 500 M t of required food.
    • 25. Freshwater management in India
      Anupma Sharma
    • 26. What Is Rainwater Harvesting?
      RWH technology consists of simple systems to collect, convey, and store rainwater. Rainwater capture is accomplished primarily from roof-top, surface runoff, and other surfaces.
      RWH either captures stored rainwater for direct use (irrigation, production, washing, drinking water, etc.) or is recharged into the local ground water and is call artificial recharge.
      In many cases, RWH systems are used in conjunction with Aquifer Storage and Recovery (ASR). ASR is the introduction of RWH collected rainwater to the groundwater / aquifer through various structures in excess of what would naturally infiltrate then recovered for use
    • 27. Why Rainwater Harvesting?
      Conserve and supplement existing water resources
      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 (run-off) and beneficially use it
      Commitment as a corporate citizen - showcasing environmental concerns
      Public Mandate (India)
      Replenishing local ground water aquifers where lowering of water tables has occured
    • 28. Why Not RWH?
      Not applicable in all climate conditions over the world
      Performance seriously affected by climate fluctuations that sometimes are hard to predict
      Increasingly sophisticated RWH systems (ASR) necessarily increases complexities in cost, design, operation, maintenance, size and regulatory permitting
      Collected rainwater can be degraded with the inclusion of storm water runoff
      Collected water quality might be affected by external factors
      Collection systems require monitoring and continuous maintenance and improvement to maintain desired water quality characteristics for water end-use
      Certain areas will have high initial capital cost
    • 29. Condensation
      Let’s take a look at
      The Water Cycle
      Precipitation
      Evapotranspiration
      Evaporation
      Infiltration
      Surface Runoff
      Surface Water
      Consumption
      Groundwater
      .ppt (21)
      Sea water intrusion
    • 30. Design and Feasibility Criteria
    • 31. Collection Area and Characteristics
      Measure Area
      Runoff Characteristics
      Roof top 0.75 – 0.95
      Paved area 0.50 – 0.85
      Bare ground 0.10 – 0.20
      “Green area” 0.05 – 0.10
      Water harvesting potential(m3) = Area (m2) X Rainfall (m) X Collection Efficiency
    • 32. Quality Issues
      Roofs contain: bird droppings, atmospheric dust, industrial and urban air pollution
    • 33. Operational Procedures and Design Considerations
    • 34. Operational Procedures and Design Considerations
    • 35. Storage
      Ponds and Reservoirs
      Artificial recharge of Groundwater
      Water Tanks
      Rainwater runoff in surface water
      Rainwater runoff in groundwater
      Rainwater runoff in tanks
      Effluent in surface water
      Effluent in ground water
      Every drop counts
    • 36. Every drop counts
    • 37. Every drop counts
    • 38.
    • 39. Every drop counts
    • 40. Jnnurm – URBAN RAIN WATER HARVESTING
    • 41. Means of water conservation
    • 42. Water Conservation…
      Every drop counts!!!
      Prof. T. I. Eldho ,
    • 43. Water Conservation
      Water conservation interventions includes contour trenches, gully plugging, vegetative and field bunding, percolation tanks.
      Overall land treatment against potential area is varying between 40-60%.
      Type of land ownership for soil and water conservation measures
      Techniques of soil and water conservation measures
      Prof. T. I. Eldho ,
    • 44.
    • 45. THANK YOU

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