Community Rainwater Harvesting

Community rainwater harvestingBhagwati Agrawal has been named a 2015 Top 10 CNN Hero. Voting for CNN Hero of the Year takes place through Sunday, November 15. All of this year’s Top 10 CNN Heroes will be honored during, “CNN Heroes: An All-Star Tribute,” Sunday, December 6, on the global networks on CNN.

When he lost his corporate job, Mr. Agrawal decided he wanted to focus his energy on creating a solution to his homeland’s drinking water crisis. Fresh water was so scarce in his community, it needed to be trucked in.

Click to watch a video showing  how his non profit organization, Sustainable Innovations, built a community rainwater harvesting system which captures rain from rooftops during India’s monsoon season, providing safe, clean drinking water to six villages with more than 10,000 people in India’s driest area.

“In many parts of the world, you never think of water. In other parts, you think of water day and night,” said Agrawal, 70. “My mission is to end water scarcity, not only in India, but globally.”

The rainwater collection system is called Aakash Ganga — Hindi for “River from the Sky” – and consists of a network of rooftops, gutters, pipes and underground reservoirs that collect and store monsoon rains, which fall from July to September. By saving this rainwater, 6 villages have potable water all year long.

Read more at CNN

Where Can You Learn About Rainwater Harvesting?

The American Rainwater Catchment Systems Association (ARCSA) is a rainwater harvesting industry membership organization with a broad range of professionals working in private, city, state, and federal government, academia, designers, installers, manufacturers and suppliers of rainwater harvesting equipment, consultants, and individuals interested in preserving, growing and supporting sustainability through rainwater collection.

arcsalogoThe mission of The American Rainwater Catchment Systems Association is to promote sustainable rainwater harvesting practices to help solve potable, non-potable, stormwater and energy challenges throughout the world.

In 1994, Dr. Hari J. Krishna of Austin, Texas founded the 501(c)(3) non-profit American Rainwater Catchment Systems Association (ARCSA) to bring renewed attention to the ancient practice of rainwater harvesting. For thousands of years collecting rainwater was a common method for providing water, but over the last century, wells and municipal water supplies took over as primary water sources. The diminishing supply of fresh water in wells and aquifers, concerns of quality and population growth are among the top reasons for the resurgence of rainwater catchment. The American Rainwater Catchment Systems Association (ARCSA) was created to promote sustainable rainwater harvesting practices throughout the United States and the world.  Read more.

ARCSA is involved in efforts including:

  • Favorable regulatory atmosphere
  • Educating professionals and the public regarding safe rainwater design, installation and maintenance practices
  • Community outreach education through a volunteer board of directors, augmented by regional directors located in various parts of the United States as well as in Australia, New Zealand, Canada and Europe

RainBank Rainwater Systems president Ken Blair is lifetime ARCSA member, ARCSA accredited Professional, ARCSA Systems Inspector, and ARCSA Northwest regional rep. Ken is a available for ARCSA workshops for interested parties as well as local governmental agencies, engineering and architectural firms. Contact Ken using the form below for more information about a workshop for your agency or group.

How Can Urban Homes Benefit From Rainwater Collection?

RBRWC9241510Just like rural homeowners, urban households can benefit from rainwater collection. Unlike rural homes, most city homes have less space available for storage. Slim line water tanks and underground storage options allow those who live in an urban environment to collect, store, and use rainwater for a number of purposes.

You do not need a lot of capacity of storage for supplemental use of rainwater. For every inch of rainfall, a thousand square feet of surface will yield 623 gallons of water. A 2,000 square foot roof in Seattle will yield over 44,000 gallons of water annually. Even with only 3,000 gallons of storage, winter use can be as much as 100% or can be stored for summer irrigation demands. See chart below  – an average 2,000 square foot roof yields over 44, 000 gallons with only 3,000 gallons of storage capacity based on 120 gallons of daily demand.  (click the image for larger view)

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Rainwater is a clean source of water that needs very little treatment for irrigation, toilet flushing, or laundry facilities. Further treatment with UV disinfection allows for whole house demands including drinking water. With more demands on our water districts due to drought conditions, every drop helps. Why not benefit from this natural resource, rather than send it down the curbside drain?