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Average Daily Flow
4,000 gal/day
Average Daily Flow vs Number of Occupants
Formel
## Sewage Flow Estimation **Average Daily Flow = Occupants x Per Capita GPD** **Peak Flow = Average / 24 x Peak Factor** Residential per-capita wastewater is typically 60 to 100 gallons per day. The peak-hour factor (2 to 4 for residential, up to 5 for commercial) accounts for the morning and evening surges.
Lösungsbeispiel
50 occupants, 80 gal/day each, peak factor 2.5.
- 01Avg daily = 50 x 80 = 4,000 gal/day
- 02Avg hourly = 4,000 / 24 = 167 gal/hr
- 03Peak hourly = 167 x 2.5 = 417 gal/hr
- 04Peak GPM = 417 / 60 = 6.9 GPM
Häufig Gestellte Fragen
What per-capita flow should I assume?
Residential: 60 to 100 GPD. Office buildings: 15 to 25 GPD per worker. Schools: 10 to 15 GPD per student. Restaurants: 30 to 50 GPD per seat.
Why use a peak factor?
Sewage flow is not constant throughout the day. The peak factor ensures the system can handle the busiest hour without backing up.
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