Difference between revisions of "Rainwater harvesting"
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| − | Yield: 1 acre * 1 inch rainfall per year = 6.273e+6 in^3 / year = 27160 gallons per year | + | Yield: |
| + | * 1 acre * 1 inch rainfall per year = 6.273e+6 in^3 / year = 27160 gallons per year | ||
| + | * San Diego County 55 year average (minimum) rainfall data = 10.26 (3.41) inches | ||
Usage estimate: | Usage estimate: | ||
* 50-70% of household usage is outdoors (e.g. lawns and gardens), average American uses 100 gal/day [https://portal.ct.gov/-/media/Departments-and-Agencies/DPH/dph/drinking_water/pdf/27icwaterfactspdf.pdf source: CT DPH] | * 50-70% of household usage is outdoors (e.g. lawns and gardens), average American uses 100 gal/day [https://portal.ct.gov/-/media/Departments-and-Agencies/DPH/dph/drinking_water/pdf/27icwaterfactspdf.pdf source: CT DPH] | ||
| − | * Average American uses 82 gal/day [https://pubs.usgs.gov/fs/2018/3035/fs20183035.pdf source: USGS] | + | * Average American uses 82 gal/day (29930 gal/year) [https://pubs.usgs.gov/fs/2018/3035/fs20183035.pdf source: USGS] |
| − | * Average Californian uses 108 gal/day [https://www.neefusa.org/story/water/home-water-use-united-states source: National Environmental Education Foundation] | + | * Average Californian uses 108 gal/day (39420 gal/year) [https://www.neefusa.org/story/water/home-water-use-united-states source: National Environmental Education Foundation] |
| + | * Average American drinks 44 ounces/day [https://www.cdc.gov/nutrition/data-statistics/plain-water-the-healthier-choice.html source: CDC] | ||
| + | Sustainability Estimate 1: 10.26 inches/year * 27160 gallons/year/acre = 278661.6 gal / 39420 = 7 persons / acre | ||
Revision as of 19:04, 26 December 2023
Yield:
- 1 acre * 1 inch rainfall per year = 6.273e+6 in^3 / year = 27160 gallons per year
- San Diego County 55 year average (minimum) rainfall data = 10.26 (3.41) inches
Usage estimate:
- 50-70% of household usage is outdoors (e.g. lawns and gardens), average American uses 100 gal/day source: CT DPH
- Average American uses 82 gal/day (29930 gal/year) source: USGS
- Average Californian uses 108 gal/day (39420 gal/year) source: National Environmental Education Foundation
- Average American drinks 44 ounces/day source: CDC
Sustainability Estimate 1: 10.26 inches/year * 27160 gallons/year/acre = 278661.6 gal / 39420 = 7 persons / acre