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Democracy Unlimited Humboldt County Rainwater A Case Study in Open Source Community Action for Sustainability Lonny Grafman - March 2009
who owns the rain? ,[object Object]
Tucson and many parts of India - rainwater collection is mandatory.
Bolivia, Year 2000, people injured and killed over water rights.http://www.internationalist.org/lapazmujeres171003www.jpg
why do it? ,[object Object]
Less impact on the waste water treatment plant
Less impact on often failing sewer systems
Water quality
Cost
Independence
Less runoff, less erosion
less processing
Local groundwater recharge
Because it works,[object Object]
a bucket
a bucket, + end use
a roof and a barrel, + end use
a roof, a filter and a barrel, + end use
a roof, a filter, a first flush and a barrel, + end use,[object Object]
Footprint of collection surface (F in ft2)
Efficiency of collection surface (e ~ .5 to .95)
Conversion from ft3 to gal (7.48 gal/ft3)
Collection/time = R * 1ft/12in * F * 7.48 gal/ft3 * e,[object Object]
how does it work? ,[object Object]
.6 gallons for every inch of rainfall on each square foot.0.6 gal/(in * square foot)
how does it really work?
A Client Democracy Unlimited Humboldt County
Service Learning
Research & Design
Building

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Who owns the rain? Building a collection system.

Notas del editor

  1. India and Tuscon http://thinkchangeindia.wordpress.com/2008/06/06/putting-laws-into-practice-the-case-of-rainwater-harvesting/, http://www.awwa.org/Resources/WaterWiserNewsDetail.cfm?ItemNumber=42023 vs Colorado and Utah -http://www.ksl.com/?nid=148&sid=4001252, http://www.rainwatercollecting.com/blog/?p=56-In Bolivia, 2000, a 17 year old boy killed and many injuries as wellhttp://www.foodandwaterwatch.org/water/private-vs-public/corporations/Bechtel
  2. These aren’t always the case, but often are. Have the audience populate this list.What is different between the water that falls and the water that runs off?
  3. Most images from http://www.appropedia.org/Rainwater
  4. http://www.rainwater-harvester.com/sizingyourharvester.htm
  5. Here is a spreadsheet for sizing - https://spreadsheets.google.com/ccc?key=0AjTvqXcCy42EcFVhbWxnY2s2VDdjV0lsNzVvbnRVTEE&hl=en
  6. Feel free to then multiply by a roof efficiency factor. This rule of thumb gives us 3000 gallons without the efficiency factor and 2400 gallons with the efficiency factor… pretty darn close to 2500 gallons.
  7. Someone wants it
  8. A partnership
  9. Research
  10. A student builds it…. Student is found through Appropedia
  11. Omar is pursuing a bachelor's degree in environmental resource engineering at HSU, concentrating in water quality issues. Omar is interested in graywater systems for the recycling ability they offer for water, an increasingly limited resource.
  12. Steven J. Addison has worked in the environmental conservation field work since he first feel in love with the Klamath River in the mid 90s. As an Environmental Resource Engineering major at Humboldt State University Steven has had a chance to continue his learning and understanding of natural processes, and hopes to one day contribute to writing future policies effecting water use on a national level.
  13. http://www.appropedia.org/M_Street_Eureka_rainwater_catchment