|Re: sidewalk material||<– Date –> <– Thread –>|
|From: Fred H. Olson (fholsoncohousing.org)|
|Date: Fri, 16 Oct 1998 07:53:07 -0500|
Loren Davidson Permaculturist, poet, philosopher loren [at] wombat.net is the author of the message below but due to a problem it was posted by the Fred the list manager: owner-cohousing-L [at] cohousing.org -------------------- FORWARDED MESSAGE FOLLOWS -------------------- robin.ellison [at] dartmouth.edu Robin Ellison wrote: > Simple to give you all info. One of the consultants that the group I > was invloved with stated that a lawn produces 90% the same run off as a > paved parking lot. I am curious as to how this consultant arrived at that conclusion. I can see conditions (matted grasses in heavy clay soil) where this could indeed be the case, but I doubt it's true for all lawns. Depending on the site layout and the slopes involved, one of the following could provide both appropriate support/traction and capture runoff: 1) If you can design your property so that some or all of your driveways and paths are on contours, create a gravel "swale" on the downhill side of them. This will capture the runoff and infiltrate it into the soil; you can then plant trees on the downhill side of the swale to take advantage of this runoff. 2) If you can't put your paths/driveways on contour, create diversions off the downhill sides of these into such a swale system. If you're getting close to the property boundary, you could use some combination of a gentle bump in the driveway and/or grating over a gutter to divert runoff before it leaves your property. Village Homes uses these techniques to great advantage, providing most or all of the water necessary to support lush plantings of trees, etc. in Davis, CA, where the average annual rainfall is, I believe, 19 inches...all of it falling between November and April/May. Loren == Loren Davidson Permaculturist, poet, philosopher Please reply to loren [at] wombat.net http://www.batnet.com/beauty/ "We all lie, Michael. The innocent lie because they're afraid of being blamed for things they didn't do. The guilty lie because they have no choice." -- Cmdr. J.D. Sinclair
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