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Green Plumbing

Category - Water-Efficient Technology

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What is the equation to determine the amount of harvested rainwater (in gallons)?

Catchment area (ft2) x rainfall depth (in.) x 0.62 conversion factor
Catchment area (ft2) x rainfall depth (in.)
Roof area (ft2) x roof slope (degrees) x rainfall depth (in.)
Roof area (ft2) x roof slope (degrees) x rainfall depth (in.) x 0.62 conversion factor

Explanation

Answer: A - The equation for calculating the amount of harvested rainwater uses the catchment area, depth of rainfall, and a conversion factor. The slope of the roof is not a consideration as it does not affect the catchment area, nor is the shape or design of the roof. The conversion factor addresses the actual amount of rainwater generated.

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