Rainwater Harvesting

Rainwater harvesting (RWH) is a simple method by which rainfall is collected for future usage. The collected rainwater may be stored, utilised in different ways or directly used for recharge purposes. With depleting groundwater levels and fluctuating climate conditions, RWH can go a long way to help mitigate these effects. Capturing the rainwater can help recharge local aquifers, reduce urban flooding and most importantly ensure water availability in water-scarce zones. Though the term seems to have picked up greater visibility in the last few years, it was, and is even today, a traditional practice followed in rural India. Some ancient rainwater harvesting methods followed in India include madakas, ahar pynes, surangas, taankas and many more.

This water conservation method can be easily practiced in individual homes, apartments, parks, offices and temples too, across the world. Farmers have recharged their dry borewells, created water banks in drought areas, greened their farms, increased sustainability of their water resources and even created a river. Technical know how for the rooftop RWH with direct storage can be availed for better implementation. RWH An effective method in water scarce times, it is also an easily doable practice. Practical advice is available in books written by Indukanth Ragade & Shree Padre, talks by Anupam Mishra and other easy to follow fun ways

Read our FAQ on Rainwater Harvesting and have many basic questions answered.

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  • Hello,We are a community of 164 households in Okkiyam Thoraipakkam, Chennai. Our community is known as Trinity Park. Currently we source water from outside, as the groundwater is unusable. We are collectively looking for a rainwater harvesting solution to improve the groundwater quality.We need help...
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While the monster floods of 2015 mercilessly gobbled up villages along the coast of Tamil Nadu, settlements in neighbouring Puducherry managed to escape the fury. Miracle, you say?

The East Coast of India is very much unlike its western counterpart both in terms of physiography and climatology. Unlike the West Coast which receives a predictable amount of rainfall within a predictable time frame, the East Coast is entirely dependent on the depressions in the Bay of Bengal to bring in the much needed rain. Due to the absence of a set pattern and the erratic nature of rainfall, the engineers of ancient times came up with a fool-proof solution – constructing tanks to hold the water.

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Farmers have been known to observe the movement of ants and butterflies to forecast rainfall. Do such indigenous practices hold the key to addressing climate change issues?

Erratic rainfall, heavy storms, extreme weather and droughts are some of the major impacts of climate changes. Though it affects everyone, certain sections of society, like indigenous people who live closer to the natural environment, are in fact more vulnerable to these variations. However, they are also the first to observe, identify and formulate required strategies to adapt to climate change. This wisdom, insight and knowledge of local people is termed as indigenous technical knowledge (ITK).

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About the programme:

The training programe will include interactive sessions with leading experts/practitioners, presentation on case studies, and visit to successfully implemented RWH and DWWT systems in CSE campus. The participants will get the opportunity to plan and design the sustainable urban water management (SUWM) systems as part of ‘Do It Yourself ‘- group exercise. 

Who can apply?

February 23, 2016 9:00AM - February 26, 2016 6:00PM

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Inspite of Dehradun being declared as an Ecologically Sensitive Zone 30 years ago, we couldn’t safeguard its fragility. Will the so called 'Smart City Plan' by UHUDA really help?

The Babur Nama mentions that the “the finest running water in Hindustan is that in the Dun.” The expanse of the va

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The city's old wells and baodis are running dry, and the Yamuna is getting more polluted by the day. Where is Delhi's water going to come from when groundwater levels are also dropping?

Delhi, home to 16.75 million people, is in the grip of a major water crisis. Statistics by the Delhi Jal Board for the year 2011 suggest that the water deficit stands at about 250 million gallons per day with the supply being 830 million gallons per day. Unaccounted for water--the gap between the water produced and distributed--is as high as 40-45%.

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Rice-fish systems allow for the production of fish and other aquatic animals as well as rice from the same rice field area, and generally without causing reductions in rice yields.

Coastal regions of Kendrapara and Jagatsinghpur districts of Odisha have been hit by cyclonic storms for more than two decades. These have severely affected the livelihood of the communities living in the region. Ashok Das of Junapangara village is one such farmer who had suffered massive agricultural losses. He owned around two acres of land, including homestead land, with a pond. With a wife, two daughters and a son to support, he gave up agriculture in 2011 and took up the job of a labourer.

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Hi,

I am building a house on 30x40 plot in Bangalore. I have made the provision for storing rain water which is approximately 30,000 liters. I want to harvest the grey water as well. I want to reuse only the water from the kitchen and washing machine. We are a family of 4 including a 3 years old kid. Is it worth considering grey water harvesting? If yes, what is the storage capacity required? What should happen when the grey storage tank overflows? Can someone please send me the design?

Thanks, Shishir Thalner

 

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About WET 2016
VIKSAT announces the next batch of the WASH Educators Training (WET 2016). This batch is particularly for the Institutions/applicants from the western eco-regions of India working on issues related to Water, Sanitation and Hygiene (WASH). The training is directed towards creating and nurturing a cadre of young educators for better understanding of water and WASH issues.

February 24, 2016 10:00AM - March 4, 2016 7:00AM
January 15, 2016 11:45PM

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Lalit Mohan Sharma of Sehgal Foundation, Gurgaon speaks to India Water Portal about innovative solutions to sail through Mewat's water crisis.

What is the exact problem as regards groundwater salinity, fluoride and water scarcity in Mewat, Haryana? Is the area underlain with saline groundwater aquifers? What is the status of surface water in the area? Can it not reduce dependence on groundwater?

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Yet to recover from the torrential lashing, the low-lying city of Chennai is slowly piecing its life back together. How ironic for a state that was a pioneer in rainwater harvesting.

Chennai has historically been a water-starved region, but never rain-starved as it receives much of its annual quota during the northeast or ‘retreating’ monsoon between October and December. But this November was like no other. 

The water level in Tamil Nadu for the week ending 11.11.2015 was 124.4mm, as against the norm of 49.3mm, a departure of nearly 152 percent. Chennai recorded a massive 239mm rainfall as against the expected 88.5mm, 170 percent more than usual [1].

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