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Revision as of 16:54, 22 April 2009
The WaterPod will be collecting rainwater from a few of the impermeable roof areas. The calculations for collection are on this spreadsheet. There are three tabs feeding the results:
- Tab:Collection Calcs - Calculates the monthly availability of the rainwater.
- Tab:Collections Dimensions - Calculates the available rainwater collection area based upon the planned structures.
- Tab:Regional Climate Data - Show monthly rainfall from historical averages. Could be made more current.
Regional Climate Data
The historical 1971 - 2000 Rainfall Normals for Central Park, New York[1] are:
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| 3.42 | 3.27 | 4.08 | 4.2 | 4.42 | 3.67 | 4.35 | 4.01 | 3.89 | 3.56 | 4.47 | 3.91 | 47.25 |
Basic Calculation
Collection = rain fall (in) * 1 ft/12 in * collection area (ft2) * 7.48 gal/ft3 * roof coefficient
Conclusion
Wait until the spreadsheet is finalized before posting the final conclusions here.