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<TITLE>Re: [Greenbuilding] quick tools for calculating rainwater run-off?</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>I believe the calc is = every square foot of roof surface gives one gallon of water for every 1/4” of rainfall.<BR>
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On 2/15/11 8:14 PM, "Erin Rasmussen" <<a href="erin@trmiles.com">erin@trmiles.com</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12pt'>The soil is clay, it absorbs water very slowly, so either it is saturated, and sheets off all the nutrients I just added to it, or it percs slowly into the ground. I am hoping to collect it temporarily into rain-gardens, catchment, etc so I can get it to go where I want it to in winter, and keep some of it around for the 1/3 of the year when it doesn't rain. <BR>
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Erin <BR>
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</SPAN></FONT><FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'><B>From:</B> <a href="greenbuilding-bounces@lists.bioenergylists.org">greenbuilding-bounces@lists.bioenergylists.org</a> [<a href="mailto:greenbuilding-bounces@lists.bioenergylists.org">mailto:greenbuilding-bounces@lists.bioenergylists.org</a>] <B>On Behalf Of </B>Reuben Deumling<BR>
<B>Sent:</B> Tuesday, February 15, 2011 5:03 PM<BR>
<B>To:</B> Green Building<BR>
<B>Subject:</B> Re: [Greenbuilding] quick tools for calculating rainwater run-off?<BR>
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I just made up my own spreadsheet calculator. If you know the area of the roof flattened out (not counting the pitches) you just need to multiply that area by the inches of rain that fall, and using some conversion figures to get cubic inches into cubic feet (1728) and cubic feet into gallons (7.48) you're good to go. <BR>
Beyond the roof area are you saying that your soils don't absorb the rain? Once its on the ground I don't think capturing and storing it is going to very rewarding unless you live on some really steep land, which you said you didn't. What are you planning to do with the water you've collected?<BR>
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By drainage do you mean something like a drywell?<BR>
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</SPAN></FONT><FONT FACE="Times New Roman"><SPAN STYLE='font-size:12pt'>On Tue, Feb 15, 2011 at 4:57 PM, Erin Rasmussen <<a href="erin@trmiles.com">erin@trmiles.com</a>> wrote:<BR>
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</SPAN></FONT><FONT FACE="Times New Roman"><SPAN STYLE='font-size:12pt'>Boy, I've been diligently insulating at my house for the last couple of weeks, and thinking of you folks for inspiration only to find that in my absence you've been talking about sending Martha Stewart to outer space. ;-) <BR>
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I live in a low spot, and we've got rainy conditions for 2/3 of the year. Does anyone have any good cheat sheets for figuring out how much rain water (in gallons) are coming off my roof, lawn and land? I've got to install some type of additional drainage system and i'd like to add rainwater catchment - but I'm not sure what scale I should be looking at.<BR>
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Total roof area is about 1000 square feet (including the garage) and it's about 0.15 acre but I should calculate for 0.25 acre to include run-off from the neighbors. Daily rainfall is typically 0.5-1 inch but it's not unusual to have 3-4 inches in a 2 day period. <BR>
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Erin Rasmussen<BR>
TR Miles Techical Consultants Inc.<BR>
and BioEnergy Discussion Lists<BR>
<a href="erin@trmiles.com">erin@trmiles.com</a><BR>
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