Rainwater Assessment & Interactive eNumator for Firm-yield Analysis Limits
A daily water-balance over the historical rain record at each station. Results describe how a
configuration would have performed across the record — past performance under your assumptions, not a forecast.
System design
ft² of roof / collection surface
gallons
gallons per day · water-efficient use ≈ 25 gal/person/day
fraction of rain captured
percent full · first-flush diversion: 10 gal per 1,000 ft² (per source model)