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Rainwater harvesting - A new hope for life
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Rainwater harvesting - A new hope for life


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A presentation on rainwater harvesting. …

A presentation on rainwater harvesting.
Presentation has brief intro about Water source and water cycle.
Causes about water sources is also raised.
The presentation talks about the solution to the problem of water shortage in the end..

Published in: Education, Technology, Business

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  • Insert a picture of one of the geographic features of your country.
  • Transcript

    • 1. Shubham jain
    • 2. India has 2% of world’s land, 4% of freshwater, 16% of population, and 10% of its cattle. • Geographical area = 329 Mha of which 47% (142 Mha) is cultivated, 23% forested, 7% under non-agri use, 23% waste. • Per capita availability of land 50 years ago was 0.9 ha, could be only 0. 14 ha in 2050. • 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.
    • 3. •New dams - inter-basin transfer •Groundwater - underdeveloped •Demand Management •Water savings - increase in efficiency, reduce evaporation. •Water productivity - increases in crop per drop •Trade (virtual water), import food.
    • 4. India expected to be severely water stressed by 2025 •Paradox of acute water crisis in Cherrapunji, the wettest place in the world •India receives most of its rain in just 100 hours a year and for the remaining 8660 hours there is nothing
    • 5. Total water management for sustainable development!!!
    • 6. Important step for solutions to issues of water and environmental conservation is to change people's attitudes and habits Conserve water because it is right thing to do!.
    • 7.  Use only as much water as you require. Close the taps well after use. While brushing or other use, do not leave the tap running, open it only when you require it. See that there are no leaking taps.  Use a washing machine that does not consume too much water. Do not leave the taps running while washing dishes and clothes.
    • 8.  Install small shower heads to reduce the flow of the water. Water in which the vegetables & fruits have been washed use to water the flowers & plants.  At the end of the day if you have water left in your water bottle do not throw it away, pour it over some plants. Re-use water as much as possible Change in attitude & habits for water conservation Every drop counts!!!
    • 9. Rain Water Harvesting? • Rain Water Harvesting RWH- process of collecting, conveying & storing water from rainfall in an area – for beneficial use. • Rain water collected at roof top passed through two stage filtration system designed to remove organic material such as leaves & twigs out of stored rain water before collected at domestic tank. • In the present Global Warming scenario, It is our responsibility to save Water, thereby indirectly Reduce Emissions & Create a Sustainable Environment for future generation.
    • 10. Rain water collected at terrace Rain Water Collection Tank Contro l Valve Filtration Tank Storm water drain line
    • 11. Domestic collection tank Final filtered water Incoming rainwater collection tank Second stage Pebble filtration First stage sand filtration
    • 12.  Rain water harvesting is essential because : 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.  Seriously consider conserving water by harvesting and managing this natural resource by artificially recharging the system.
    • 13. • RWH - yield copious amounts of water. For an average rainfall of 1,000mm, approximately four million litres of rainwater can be collected in a year in an acre of land (4,047 m2), post-evaporation. •As RWH - neither energy-intensive nor labourintensive •It can be a cost-effective alternative to other wateraccruing methods. • With the water table falling rapidly, & concrete surfaces and landfill dumps taking the place of water bodies, RWH is the most reliable solution for augmenting groundwater level to attain self-sufficiency
    • 14. Rain Water Harvesting Advantages 1.Provides self-sufficiency to water supply 2.Reduces the cost for pumping of ground water 3.Provides high quality water, soft and low in minerals 4.Improves the quality of ground water through dilution when recharged 5.Reduces soil erosion & flooding in urban areas 6.The rooftop rain water harvesting is less expensive & easy to construct, operate and maintain 7. In desert, RWH only relief 8. In saline or coastal areas & Islands, rain water provides good quality water
    • 15.  A well is not for storing water. The well connects the surface to the underground water sources. Based on the underground water availability during a rainy season, the water level in the well will go up and down.  Long after the rains have stopped, the well gets its water from the underground sources leaking into it.  Where you get water using a bore-well, rain water did percolate through any soil structure at the ground level, including rocky, laterite rock surface.  Every bore well will eventually go dry, some sooner, some later.  Use a bore well in reverse. Use a dried up bore well to recharge the underground supply by adding a percolation pit at the top
    • 16. A. Build community wells in a few places in the village. Within 10-20 feet from the well, construct a bore-well using a hand-operated pump. Educate the villagers to keep the area around the well and the bore well clean - no washing (human, cattle, motor cycles, clothing), no defecation. B. If there are existing water tanks in the village, desilt and dredge them every 3 years. C. If there are any small rivers or streams, build check-dams across them to hold the rain water for usage after the rains have stopped.
    • 17.  Economics  Harvested rainwater can cost from Rs 5 /- to Rs 30/- a kilo litre  When it is cheaper than alternate source water it is easier adopted  Industries are the first to consider rainwater harvesting  The city of Hyderabad subsidizes r.w.h  The city of Indore gives a property tax rebate
    • 18. Made By: