Equation2: Monthly harvested rainwater volume. (v4)

deepak cherukumilli

LEED AP (BD+C)

Dar al Handasah

LEEDuser Basic Member

1 thumbs up

Project location :

India

April 29, 2015

Reference guide v4 BD+C:Page290: STEP 5: I didnot understand why a 0.15 is used in this equation. Is this for any kind of losses in the rain water storage process. Cant we just use directly equation 3 to get adjusted LWR after equation 1? Step 6: 0.15 in equation 4 is clear to account for 15% reduction by smart controls.

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Theresa Backhus

Sites Technical Specialist, LEED

USGBC

LEEDuser Premium Member

47 thumbs up

Mon, 08/31/2015 - 16:32

Hi Deepak, We will be publishing an addendum to the PDF and print versions of the BD+C Reference Guide on October 1 that addresses this issue. Step 5, specifically Equation 2, should read: "Amount available = Gallons per 1 inch of rain x Average inches rain per month." The online Reference Guide already shows this correct equation.

Jing Zhang

LEEDuser Basic Member

0 thumbs up

Wed, 10/19/2016 - 21:13

Hello, I still didn't get meaning of 0.15 in equation 4. Does it mean, for the additional 30% which mentioned in option 2, only maximum 15% can be supplied by either rainwater or smart irrigation control? In addition, I couldn't find the addendum for this topic in addenda database. Could you please illustrate more?