Kevin G Mercer 
Member since Apr 1, 2015


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Re: “Rain Catchment-22

The quote, "As for rain barrels at [the] home level, they are not very cost-efficient. It is much better and cheaper to direct your storm runoff onto your lawn or flower beds and let it soak in." is why rain harvesting has an uphill struggle for legitimacy. Let me put this very succinctly; that's rubbish.
In drought conditions, stormwater does not infiltrate but sheet flows off lawns and gardens until they are already slightly saturated enough for the water to infiltrate.
Yes, tiny 50 gallon rain barrels are useless. But up that to say 200USG per downspout or about 600-1000USG per home and you'll notice a significant reduction in both runoff impacts and potable water demand. Volume is king but so is having capacity available to catch and hold that storm when it arrives.
I'll leave this thread with one suggestion, RainGrid lot level stormwater utilities distribute automated cisterns to householders free of charge on the basis that catching stormwater at the lot level actually pays for itself in saved infrastructure damage and insurance risk reduction. And that's before even bringing potable water conservation into the discussion.

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Posted by Kevin G Mercer on 04/01/2015 at 8:31 AM

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