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Bengaluru\u2019s \u2018Rain Man\u2019: Why Rainwater Harvesting is the future of water conservation<\/h1>\n
AR Shivakumar\u2019s house in Bengaluru, relies completely on water harvested during the rains and collected in underground and overhead tanks.<\/div>\n

AR Shivakumar, a resident of Bengaluru, has not paid a penny for his family\u2019s water needs for the last 20 years. A pioneer in water harvesting techniques, he believes in the mantra, \u2018be the change you wish to see in the world.\u2019 Shivakumar is the principal investigator for rainwater harvesting (RWH) at the Karnataka State Council for Science and Technology (KSCST). His house \u2018Sourabha\u2019 in Vijaynagar, Bengaluru, which he built in 1994, depends entirely on rain water.<\/p>\n

As a child in Amanghatta village in Tumkur district, Shivakumar and his sisters would wake up at dawn, to fetch water from the village well. Therefore, when he started building his house in Bangalore, he wanted to ensure that it would be free from water woes.<\/p>\n

\u201cWhen my wife Suma and I were planning our dream home, it was our desire to have\u00a0a house, where nature would fulfil our need for light, ventilation and water<\/a><\/span>. We read studies conducted by the Indian Institute of Science (IISc) and realised that rainwater harvesting was the answer to our water requirements. Even the construction of our house was done, using harvested rainwater,\u201d he recalls.<\/p>\n

\u201cOur needs are met by water harvested during the rains and collected in an underground tank, as well as an overhead tank,\u201d explains Shivakumar, who has conducted various training workshops and awareness programmes on RWH. His commitment towards water conservation, was instrumental in establishing the \u2018Sir M Visvesvaraya Rainwater Harvesting Theme Park\u2019 \u2013 the first-of-its-kind in the country, in Jayanagar, Bengaluru.<\/p>\n

Rainwater that falls on the roof is channelled into a 4,500-litre tank, built on the ground floor. The excess rainwater is diverted and allowed to percolate into the ground, through a system of percolation tanks. This system consists of four interconnected plastic drums that are buried underground, with their base cut open to recharge the groundwater. After the remaining portion of the roof water is cleaned by a popup filter, it flows into an underground sump of 10,000 litres capacity, under the car park.<\/p>\n

Advantages of rainwater harvesting<\/b><\/h2>\n
  • RWH is a quick solution, to increase the availability of water, in areas that have inadequate resources.<\/li>\n
  • It increases ground water levels and mitigates the effects of drought.<\/li>\n
  • It reduces rain water run-off, which may otherwise, flood storm water drains.<\/li>\n
  • It serves as a cost-effective method to reduce soil erosion.<\/li>\n<\/ul>\n

    However, its successful implementation, depends on the collective efforts of individuals, government bodies and builders. One can store rain water in tanks and use it to flush toilets, water plants, etc. Rain water can also be harvested, to recharge groundwater through recharge pits, dug wells, borewells, soak pits and recharge trenches.<\/p>\n


    The situation in Bengaluru<\/b><\/h2>\n

    In the last three decades, Bengaluru has experienced eight years of severe to moderate drought. Although the city receives 1,000 millimetres of rain water annually (equal to 2,30,000 litres of pure water in a plot of 2,400 sq ft), rapid urbanisation has substantially reduced the percolation of rainwater into the sub-soil, while the quantity of run-off water in storm drains, has increased tremendously.<\/p>\n

    \u201cAt least 50% of the city\u2019s water requirement can be met through rainwater harvesting,\u201d maintains Shivakumar. \u201cIf everyone practices rainwater harvesting in Bengaluru, in the next 25 years, the city can sustain itself with its available water sources. Similarly, other places in India, should also adopt RWH. Every drop of rainwater that is harvested, will save us from a water famine,\u201d he concludes.<\/p>\n

    <\/p>\n<\/div>\n","alt_image":"Bengaluru\u2019s \u2018Rain Man\u2019: Why Rainwater Harvesting is the future of water conservation","meta_title":"rainwater harvesting","meta_description":"rainwater harvesting","create_date":"2020-06-14 02:24:50"},{"id":"35","title":"Rainwater Harvesting- How it is done and how important is it for future?","image":"https:\/\/\/242843\/blogs\/35\/0927d3190d081aa1877980fe6187c36a.jpg","content":"

    Water is the reason why life exists on planet Earth, without it life is unimaginable. However, freshwater sources are becoming scarce with the passage of time. Reports of several global agencies, including United Nations, indicate that if the current situtation of water does not change and preventive measures are not taken, then world will start to run out of fresh water by 2050. Rainwater harvesting is a sustainable process that helps in preserving rain water for different purposes and for the future needs as well. Rainwater Harvesting is a method of collecting and storing rain water to be used for various purposes while it can be used in future as well.<\/span><\/p>

    Methods of Rainwater Harvesting<\/p>

    There are primarily two prevalent methods of rainwater harvesting that are used in most of the areas:<\/p>

    1. Surface Run-off Rainwater Harvesting:\u00a0The rainwater that flows off in the urban areas can be collected and stored to recharge the groundwater level or the aquifer bed, instead of letting the water flow into the drains.<\/li>
    2. Rooftop Rainwater Harvesting:\u00a0In rooftop harvesting the rainwater is directly collected from the roof of the buildings and transported either into a tank or an artificial aquifer. Through this method the harvested water can be used for daily use purposes (including drinking and cooking, only after purifying the water at a basic level) and for recharging the aquifers and help restore the groundwater levels.<\/li><\/ol>

      Components:\u00a0Catchments, Transportation, First Flush, Filter<\/p>


      1. Water storage for usage<\/li>
      2. Recharging aquifers<\/li>
      3. Bore well recharging<\/li>
      4. Recharge pits<\/li>
      5. Recharge shafts or Soakway<\/li>
      6. Dug wells recharge<\/li>
      7. Recharging Trenches<\/li><\/ol>

        Benefits of Rainwater Harvesting<\/p>

        • Storing rainwater helps in recharging the aquifers.<\/li>
        • It helps in preventing urban flooding due to excess rain.<\/li>
        • The stored water can be used for irrigation practices in farming region.<\/li>
        • The water can be used for daily use and help in reducing water bills in the towns and cities.<\/li>
        • Is a helpful way to tackle the scarcity of water in arid and dry regions.<\/li>
        • It helps in restoring the groundwater level.<\/li><\/ul>

          Relevance today and in future<\/p>