Difference between revisions of "Rainwater harvesting"
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Yield: | Yield: | ||
* 1 acre * 1 inch rainfall per year = 6.273e+6 in^3 / year = 27160 gallons per year | * 1 acre * 1 inch rainfall per year = 6.273e+6 in^3 / year = 27160 gallons per year | ||
| − | * San Diego County | + | * San Diego County 92-year average (minimum, std) rainfall data = 10.26 (3.41, 4.16) inches |
* 75% catchment is considered good | * 75% catchment is considered good | ||
Usage estimate: | Usage estimate: | ||
Revision as of 21:00, 26 December 2023
Yield:
- 1 acre * 1 inch rainfall per year = 6.273e+6 in^3 / year = 27160 gallons per year
- San Diego County 92-year average (minimum, std) rainfall data = 10.26 (3.41, 4.16) inches
- 75% catchment is considered good
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 Estimates
- # of Californians sustained off 1 acre, based on...
- Annual Average Rainfall: 10.26 inches * 27,160 gallons/inch of rainfall = 278,661.6 gal / 39,420 gal/person/yr = 7 persons = about 2 average households
- 97.5% Coverage (Avg - 1 StDev): 6.1 inches * 27,160 gallons/inch of rainfall = 165,676 gal / 39,420 gal/person/yr = 4.2 persons = about 1.3 average households
Detailed resources for planning a build:
But is it legal in California?